Transitioning to lead-free soldering and RoHS compliancy is a lot more than only choosing a lead-free solder.
There will be equipment compatibility issues to investigate, component and board procurement and compatibility problems to address. There will be lead-free process validation studies, lead-free product implementation plans to execute and training for line supervisors and operators to be done. All this takes a company’s commitment, resources and a solid understanding of the potential pitfalls.
The first thing a company must do is to create a RoHS Compliancy Team, comprising of
manufacturing engineers, purchasing, inventory, training and quality personnel. In many cases
reliability test engineers are also involved, since the components and boards will change as will
the solder; it may be necessary to verify the reliability of the lead-free, RoHS compliant assembly.
Process engineers will have to determine the lead-free alloy and lead-free flux systems to be used. Selecting soldering materials carefully can prevent many costly defects and increase reliability.
Key Factors to Consider When Choosing Solder Paste
- Lead-free flux must be used if using additional flux besides the solder, not typically recommended
- Flux system able to solder a variety of surface finishes
- Risk of tin whisker growth with higher tin content
- Good cold and hot slump properties
- Low bridging and solder ball potential
- Low voiding potential
- Low decomposition; low condensate
- Clear residues, if no-clean type
- Pin-testability of no-clean residues
- Cleanability if water washable paste in water if required
- Print speed
- Abandon time
- Stencil life
- Tack life
- Solder ball potential
- Slump, cold and hot
- Spread on various metallization
- Solderability on various finishes
- Reflow window
- Voiding potential
- Double reflow window capability
Questions to Better Define the Lead-Free Solder Paste
- Which solder alloy and powder diameter will be specified?
- Are you going to need water washable or no-clean solder paste chemistry?
- What are the finishes you are soldering?
- Are you going to use nitrogen reflow or air reflow?
- Are you doing double-sided SMT?
- If a no-clean paste will be used, which IPC classification?
- If you use water washable pastes, how cleanable is the flux residue?
- Do you need high speed printing pastes?
- Do you need a paste with a wide print process window, tack life, stencil life?
If the paste is selected carefully and the SMT process optimized to suit the chosen chemistry,
the lead-free transition will be achievable without jeopardizing reliability and product yields.
Sometimes a solder paste is selected which does not fit the process, high speed printing may
not be a necessity, a paste which will perform at lower peak temperatures not required. Solder
paste formulation is all about creating certain attributes at the expense of others.
The equipment will have to be lead-free compatible. For example the wave solder machine will require leach resistant solder pots, impeller, and ducting to avoid iron erosion with the higher tin containing lead-free solders such as tin-silver-copper and tin-copper alloys. The reflow oven will have to be able to give higher peak temperatures in the range of 230-245°C, but also be able to maintain production outputs at these thermal profiles.
Common Defects Associated with Lead-Free
- Off-pad solder balling
- Mid-chip solder balling
- Tomb-stoning
- Bridging (shorts) on fine pitch QFP leads
- Open joints
- Non-Wetting
- De-Wetting
- Cold solder joints
- Voids
- Excessive dullness or surface cracks
Preventing Icicling of Wave Soldered SMDs
Icicling may cause shorts or heat damage to components and has a higher tendency to occur since the surface energy of lead-free solders such as SAC and SnCu based alloys is higher. To avoid this, ensure the flux has good, sustained activity and therefore flux is still present at the exiting point of the board as to offer a good peel back of the solder. This defect is more common with low residue no-clean fluxes.
Lead-Free Hand Soldering Considerations
Soldering irons will require lead-free tips to avoid reduced tip life due to tin erosion. The picture below shows a tip destroyed by tin erosion when using lead-free solder on a regular leaded tip.
In this case the tip life was only three weeks. Traditionally the user had been used to a tip life averaging 3 months with leaded 63/37. To avoid the escalation of tips used per year, LF tips should be used. These tips have additives in the iron to reduce leaching.
- Insure the tips are designed for lead-free
- Insure the temperature is set to 700-800 ºF or just above the solder melting point
- Tin-Silver-Copper (SAC) solder will flow more readily than Tin-Copper (SnCu) solder
- Insure the solder flux content is 2-3% by weight in the solder wire
- Use LF tips with the longest life
- Insure the parts are easily solderable with the chosen flux
- Avoid prolonged contact times
- Avoid needless reworking of the joint
- Avoid the use of additional liquid flux
Use the correct tip for the job
Tech Tip: Avoiding the use of excessively higher tip temperatures will also reduce the erosion and prolong tip life.
Quality Verification & Testing
Lead-free may also require the implementation of other process verification methods such as X-Ray, to examine lead-free joints for voids. This is especially true with lead-free BGA assembly where voids or insufficient reflow and poor wetting can occur. However, optical inspection systems are best suited to examine joints for wetting performance and detecting hairline fractures.
These tests are recommended since lead-free solders tend to create more voiding than 63/37 eutectic solder.
- X-ray analysis
- Cross-sectional testing
- Intermetallic bond verification
- Outside laboratory visual confirmation
X-ray inspection of through-hole and SMD parts followed by select cross-sections of certain joints will allow the verification of joint meeting the voiding criteria established by IPC (Institute of Printed Circuits) and the customer. In some cases, voiding can occur which would be difficult to assess otherwise.
Voiding can occur for a variety of reasons such as flux issues, plating issues, moisture pick-up and in the case of through-holes hole-to-lead ratio. X-ray and cross-sectional tests ensure voids are not excessive but cross-sectional testing can also reveal the nature of the intermetallic bond. Combined with visual these tests ensure the lead-free processes are performing optimally.
Click here for all DigiKey Solder Products.
Related Topics
Source - Kester RoHS Compliancy-Lead-free Roadmap
Source - Kester: Lead-free Wave-Insight on Optimization
Source - Kester: Case Study SAC and SnCu in Contract Assembly
Source - Kester: Developing a Reliable Lead-Free SMT Process
Source - Kester: Reliability with SnCu Based Solders
Easily Remove Solder Joints: SMD Removal / Desoldering Solder - What is Removal Alloy?
Tin Whiskers in Pure Tin Surface
Nickel Advantages in Tin-Plated Terminals: Surface Contact, Soldering, & Tin Whisker Growth
Summary
SMD291NL-ND
CW8400-ND
1873-1621-10S-ND
75-ES1697-ND
2805-MCC-PW210A-ND
2805-MCC-SPR-ND
1873-1102-ND
1873-1631-16SB-ND
CQ4LF-16-ND
315-SMD491-10M-ND
315-CQ4LF-B-R-ND
SMD4300TF30-ND
2805-MCC-SPRG-ND
CQ2LF-ND
CQNTRM-ND
2260-PEN-NC-VF-ND
315-SMD291NL-5M-ND
315-SMD291NL-10M-ND
315-RMA591NL-10M-ND
1873-2506-N-ND
473-1412-ND
315-CQ7LF-B-R-ND
315-CQ2LF-B-R-ND
315-CQ8LF-B-R-ND
CQ2LF-1.0-ND
315-CQIRM-1.0-ND
SMDST2CC4-ND
CQNTRM-1.0-ND
315-CQNIRM-ND
2260-PEN-NC-VF-SET-ND
315-NC551-3CC-ND
315-SGF991-10CC-ND
CW9400-ND
75-ES897B-ND
315-WS995-ND
2260-PEN-RMA-VF-SET-ND
315-NC551-5CC-ND
2805-MCC-BAC-ND
1873-1621-10SB-ND
315-NC551-10CC-ND
315-SMD491-ND
2805-MCC-PROWR-ND
315-CQNIRM-1.0-ND
2805-MCC-PROW-ND
2805-MCC-VOC10A-ND
473-837LFWS-1L-ND
1873-1105-ND
CQ2LF-16-ND
SMD291NL75G-ND
SMDLT75G-ND
117-91-7482-3331-ND
CQ4LF-128-ND
315-SGF1-4OZ-ND
315-SGF991-5CC-ND
315-NC551-5M-ND
2805-MCC-SPR19A-ND
SMD291NL150G-ND
SMDLT150G-ND
CQ2LF-128-ND
2805-MCC-PFR10A-ND
315-CQ2LF-AERO-ND
117-302703-ND
83-1046-0952-ND
117-90-7482-3320-ND
315-CQIRM-ND
2260-PEN-RMA-VF-ND
CQNTRM-0.5-ND
315-SMD491-5M-ND
CQ2LF-0.5-ND
315-CQIRM-0.5-ND
315-RMA591NL-5M-ND
2260-REFILL-NC-ND
2260-REFILL-NC-VF-ND
2260-REFILL-RMA-ND
473-836LFNC-P-ND
315-WS991-ND
315-NC551-10M-ND
473-836LFNC-1L-ND
473-8351-1L-ND
315-NC551-30CC-ND
315-NC551-3M-ND
315-SGF1-8OZ-ND
315-CQNIRM-0.5-ND
315-SGF991-30CC-ND
315-RMA591NL-ND
2805-MCC-PW2G-ND
117-300305-ND
CW8700-ND
70-4001-0003-ND
3M155811-ND
117-300303-ND
117-300203-ND
891672-ND
117-300304-ND
117-300204-ND
CW3220-ND
1721030-ND
CW8710-ND
134-8622-ND
117-65-0002-2372-ND
117-64-0004-0985-ND
117-65-0004-0985-ND
2349-FLS312-1G-ND
2349-FLS312-4G-ND
2349-FLS300-1G-ND
2349-FLS400-1G-ND
2349-FLS385-1G-ND
1873-1631-5S-ND
3844-FJCM4ZEA-ND
3844-FJCM01EA-ND
3844-FJCM2ZEA-ND
4590-2327449-ND
SMD291NL
CW8400
1621-10S
ES1697
MCC-PW210A
MCC-SPR
1631-16S
1631-16SB
CQ4LF-16
SMD491-10M
CQ4LF-B-R
SMD4300TF30
MCC-SPRG
CQ2LF
CQNTRM
PEN-NC-VF
SMD291NL-5M
SMD291NL-10M
RMA591NL-10M
2506-N
8351-125ML
CQ7LF-B-R
CQ2LF-B-R
CQ8LF-B-R
CQ2LF-1.0
CQIRM-1.0
SMDST2CC4
CQNTRM-1.0
CQNIRM
PEN-NC-VF-SET
NC551-3CC
SGF991-10CC
CW9400
ES897B
WS995
PEN-RMA-VF-SET
NC551-5CC
MCC-BAC
1621-10SB
NC551-10CC
SMD491
MCC-PROWR
CQNIRM-1.0
MCC-PROW
MCC-VOC10A
837LFWS-1L
1651-16S
CQ2LF-16
SMD291NL75G
SMDLT75G
91-7482-3331
CQ4LF-128
SGF1-4OZ
SGF991-5CC
NC551-5M
MCC-SPR19A
SMD291NL150G
SMDLT150G
CQ2LF-128
MCC-PFR10A
CQ2LF-AERO
302703
83-1046-0952
90-7482-3320
CQIRM
PEN-RMA-VF
CQNTRM-0.5
SMD491-5M
CQ2LF-0.5
CQIRM-0.5
RMA591NL-5M
REFILL-NC
REFILL-NC-VF
REFILL-RMA
836LFNC-P
WS991
NC551-10M
836LFNC-1L
8351-1L
NC551-30CC
NC551-3M
SGF1-8OZ
CQNIRM-0.5
SGF991-30CC
RMA591NL
MCC-PW2G
300305
CW8700
70-4001-0003
NOVEC FLUX REMOVER
300303
300203
891672
300304
300204
CW3220
1721030
CW8710
8622
65-0002-2372
64-0004-0985
65-0004-0985
FLS312-1G
FLS312-4G
FLS300-1G
FLS400-1G
FLS385-1G
1631-5S
FJCM4ZEA
FJCM01EA
FJCM2ZEA
2327449
SMDSWLF.0312OZ-ND
SMDIN52SN48-ND
315-CQ100GE.0311LB-ND
82-125-ND
82-111-ND
KE1813-ND
BARSN96.5AG3.0CU0.5-ND
KE1922-ND
KE1923-ND
SMDSWLF.00650G-ND
90-7068-8850-ND
KE1919-ND
117-91-7482-3340-ND
117-44-9574-0050-ND
KE1921-ND
KE1855-ND
473-1101-ND
82-124-ND
KE1133-ND
KE1125-ND
KE1128-ND
KE1130-ND
SMDSWLT.040100G-ND
KE1127-ND
KE1124-ND
KE1123-ND
KE1121-ND
KE1134-ND
KE1132-ND
KE1898-ND
KE1137-ND
117-44-7068-0000-ND
KE1129-ND
KE1131-ND
KE1122-ND
KE1892-ND
KE1126-ND
4590-1993881-ND
KE1896-ND
KE1811-ND
KE1810-ND
KE1853-ND
KE1894-ND
KE1854-ND
KE1809-ND
315-SMD3SWLT.040200G-ND
SMDSWLT.040200G-ND
4590-2041005-ND
KE1897-ND
315-SMDIN66.3BI33.7-ND
82-109-ND
315-SMDSWLT.0478OZ-ND
SMDSWLF.00850G-ND
2260-WBRASAC20-1LB-ND
1042097-ND
KE1812-ND
315-WW100GE.0311LB-ND
2757-EBSN96.5AG3-ND
2757-CWSN99.3NCCW2.2.015-ND
2757-CWSN99.3.0621#-ND
2757-CWSN99.3NCCW2.2.032-ND
2757-CWSN99.3WRMAP.062-ND
2757-CWSN99.3NCCW2.2.062-ND
2757-CWSN99.3.032-ND
2757-CWSN99.3WRMAP3.032-ND
2757-CWSN99.3WRAP3.015-ND
2757-CWSN99.3WRMAP3.015-ND
2757-CWSACRA3%.0321#-ND
2757-CWSACNCCW2.0321#-ND
24-9574-7619-ND
2757-CWSACWRMAP3.032-ND
2757-CWSACWRMAP3.062-ND
2757-SWSAC.0321#SPLTB-ND
2757-CWSACWRAP.015-ND
2757-CWSN96.5AG3-ND
2757-CWSACNCCW2.2.062-ND
2757-CWSACWRMAP.015-ND
2757-CWSACNC.0151#-ND
2757-CWSnCu0.7NiNCCW2.2%.0321#TB-ND
2757-CWSnCu0.7NiRA3%.0621#TB-ND
2757-CWSnCu0.7NiNCCW2.2%.0621#TB-ND
2757-CWSnCu0.7NiRMA3%.0621#TB-ND
2757-CWSnCu0.7NiRA3%.0321#TB-ND
2757-CWSnCu0.7NiRMA3%.0321#TB-ND
2757-SWSAC.0621#SPLTB-ND
2757-SWSAC305.0151#TB-ND
SMD291SNL-ND
TS391LT-ND
SMD291SNL50T3-ND
TS391SNL50-ND
SMDIN97AG3-ND
SMDLTLFP10-ND
TS391LT50-ND
SMD291SNL10-ND
BARSN99.3CU0.7-8OZ-ND
SMD4300SNL10-ND
TS391LT10-ND
473-1270-ND
SMDLTLFP10T5-ND
SMDSWLTLFP32-ND
SMD291SNL10T5-ND
SMDIN52SN48-R-ND
70-1608-0820-ND
SMD291SNL250T3-ND
NC2SWLF.0311LB-ND
315-EXB-SN96.5AG3.0CU0.5-ND
SMD291SNL250T4-ND
SMD4300SNL250T4-ND
TS391SNL250-ND
SMDLTLFP250T3-ND
SMDLTLFP250T4-ND
TS391LT250-ND
315-TS991SNL500T4-ND
KE1814-ND
SMD291SNL250T5-ND
KE1818-ND
117-93-7069-9510-ND
82-110-ND
473-1103-ND
KE1891-ND
4590-2003721-ND
KE1816-ND
70-4021-1410-ND
KE1893-ND
KE1817-ND
7019030810-ND
4590-2041006-ND
RASWLF.0311OZ-ND
RASWLF.0151OZ-ND
RASWLF.0312OZ-ND
SMDSWLF.0311OZ-ND
SMDSWLF.0201OZ-ND
SMDSWLF.0151OZ-ND
SMD2SWLF.0201OZ-ND
SMD2SWLF.0151OZ-ND
RASWLF.0152OZ-ND
315-SMD3SWLT.0471OZ-ND
2260-WBWSSAC31-2OZ-ND
2260-WBNCSAC31-2OZ-ND
2260-SSLFNC-15G-ND
315-SMD2SWLT.0471OZ-ND
315-NC191LT15T5-ND
315-SMDSWLF.0061G-ND
2260-WBWSSAC20-2OZ-ND
2260-WBNCSAC20-2OZ-ND
315-SMDSWLT.0471OZ-ND
SMD2SWLF.0312OZ-ND
315-NC191SNL15T5-ND
SMDSWLF.0202OZ-ND
SMDSWLF.0152OZ-ND
315-NC191SNL35-ND
315-SMD3SWLT.04010G-ND
RASWLF.0314OZ-ND
72-T0051404699-ND
315-SMD2SWLT.04010G-ND
SMDIN100-ND
315-SMDSN60BI40-ND
SMDSWLT.04010G-ND
315-SMDSWLF.0062G-ND
RASWLF.0204OZ-ND
SMD2060-25000-ND
473-1269-ND
SMD2055-25000-ND
SMD2050-25000-ND
RASWLF.0154OZ-ND
315-SMDSWLTLFP16-ND
315-NC191LT35T5-ND
473-4900-18G-ND
SMD2040-25000-ND
2260-WBNCSAC31-4OZ-ND
2260-WBWSSAC31-4OZ-ND
SMD291SNLT5-ND
SMD2036-25000-ND
315-SMD2SWLT.0472OZ-ND
SMD2032-25000-ND
2260-WBNCSAC20-4OZ-ND
SMD2SWLF.0204OZ-ND
315-REM2.7-ULTRA-NL-ND
315-SMDSWLT.0472OZ-ND
315-NC191LT50T5-ND
SMD2024-25000-ND
72-T0051404899-ND
SMD291SNL10T4-ND
315-SMDIN100-0.4MM-ND
SMD2016-25000-ND
315-SMDSWLF.0065G-ND
72-T0051402599-ND
SMDSWLF.0314OZ-ND
SMDSWLF.0204OZ-ND
SMDSWLF.0154OZ-ND
SMD4300SNL10T4-ND
315-SMD3SWLT.04020G-ND
315-SMD2SWLT.04020G-ND
72-T0051388299-ND
72-T0051388499-ND
315-EXB-SN96.5AG3.0CU0.5-0.5LB-ND
SMDSWLT.04020G-ND
SMDSN100-S-16-ND
315-EXB-SN99.3CU0.7-ND
SMD2SWLF.0318OZ-ND
SMD2SWLF.0208OZ-ND
BARSN96.5AG3.0CU0.5-8OZ-ND
SMD2SWLF.0158OZ-ND
72-T0051388399-ND
473-1271-ND
315-SMDSN90AU10-2FT-ND
315-SMDSWLF.00610G-ND
SMD2SWLF.012100G-ND
473-1100-ND
315-SMD2SWLT.0474OZ-ND
SMD291SNL60T4-ND
315-REM4.5-ULTRA-NL-ND
BARSN42BI57AG1-ND
473-1102-ND
SMD4300SNL250T3-ND
72-T0051388799-ND
SMDSWLF.0318OZ-ND
RASWLF.0318OZ-ND
SMDSWLF.0208OZ-ND
315-NC191LT250-ND
SMDSWLF.0158OZ-ND
SMD2SWLF.0311LB-ND
70-1709-0820-ND
315-SMDLTLFPT6-ND
NC2SWLF.0201LB-ND
315-CQ100GE.0201LB-ND
315-SMDIN52SN48-1.69X5.71-R-ND
SMDIN100-R-ND
72-T0051388599-ND
RASWLF.0158OZ-ND
473-1165-ND
72-T0051388699-ND
72-T0051388899-ND
72-T0051387399-ND
72-T0051387499-ND
315-SMD2SWLT.04050G-ND
SMDSWLT.04050G-ND
865940-ND
NC3SWLF.0311LB-ND
72-T0051387699-ND
2260-WBWSSAC31-1LB-ND
2260-WBRASAC31-1LB-ND
NCSWLF.0311LB-ND
315-NC191SNL250T5-ND
NCSWLF.0201LB-ND
2260-WBRC9645-ND
RASWLF.0311LB-ND
SMDSWLF.0201LB-ND
SMDSWLF.0151LB-ND
RASWLF.0151LB-ND
315-SMD291SNL50T6-ND
473-1115-ND
SMD4300SNL250T5-ND
315-SMD4300LTLFP250T4-ND
315-TS991SNL500T3-ND
82-122-ND
315-WS991LT500T4-ND
82-123-ND
315-SMD3SWLT.040100G-ND
315-SMDLTLFP50T6-ND
315-SMD2SWLT.040100G-ND
SMD2032-ND
SMD2024-ND
SMD2020-ND
SMD2016-ND
473-1211-ND
4900P-250G-ND
72-T0051386499-ND
4590-2023641-ND
117-70-5306-2410-ND
315-SMD2SWLT.040200G-ND
70-4021-0811-ND
117-70-5426-2411-ND
SMDSWLF.020.4OZ-ND
SMD2SWLF.0311OZ-ND
2260-WBRASAC31-2OZ-ND
SMDAG100-S-0.25-ND
315-SMD3SWLT.0472OZ-ND
SMD2SWLF.0314OZ-ND
2260-WBWSSAC20-4OZ-ND
2260-WBNCSAC31-35G-ND
2260-WBAR4257/1-1/2LB-ND
SMDIN100-S-1-ND
S200-ND
SMDAG100-S-1-ND
2260-WBARS99.3/.7-ND
SMD2SWLF.0201LB-ND
315-SMD3SWLT.0478OZ-ND
315-SMD2SWLT.0478OZ-ND
2260-SSLTNC-250G-ND
72-T0051387799-ND
2260-WBNCSAC32-ND
72-T0051388099-ND
315-SMDSWLF.0593.31LB-ND
SMD2040-ND
72-T0051386299-ND
72-T0051386699-ND
72-T0051386099-ND
SMDLTLFP500T3C-ND
72-T0051387099-ND
315-REM32-ULTRA-NL-ND
2260-WBARS993/7-1/2LB-ND
2260-WBARSAC-1/2LB-ND
2260-WBENVIRO-ND
2260-WB964-ND
2260-WBNCSAC20-ND
315-SMD-SC-SN99.3CU0.7-0.031-1OZ-ND
315-SMD-SC-SN96AG4-0.031-1OZ-ND
315-SMD-SC-SAC305-0.031-1OZ-ND
315-SMD-SC-SAC405-0.031-1OZ-ND
4590-2591111-ND
4590-2591112-ND
4590-2370856-ND
315-WS991LT500T4C-ND
315-CQ-SS-SAC405-0.30MM-25000-ND
315-CQ-SS-SAC405-0.50MM-25000-ND
315-CQ-SS-SAC405-0.60MM-25000-ND
315-SMDAU80SN20-3INCH-0.762MM-ND
721471-ND
4590-2472657-ND
2491-CS-PBF1-ND
2757-EBSN99.3CU.71#-ND
3844-RC96L2062PSAC-ND
117-70-1608-0904-ND
315-REM16-ULTRA-NL-ND
117-275501-ND
2757-EBSnCu0.7Ni1#TRITB-ND
315-NC191LT10-ND
SMDLTLFP-ND
TS391SNL-ND
BARSN99.3CU0.7-ND
2260-WBRC96432-ND
KE1920-ND
315-WS991SNL500T4-ND
KE1856-ND
4590-2023628-ND
KE1895-ND
70-3213-0810-ND
RASWLF.0201OZ-ND
SMD2SWLF.031.7OZ-ND
72-T0051404999-ND
RASWLF.031.7OZ-ND
315-NC191LT15-ND
RASWLF.0202OZ-ND
315-NC191SNL15-ND
315-NC191SNL50-ND
2260-SSLTNC-15G-ND
SMDAL-ND
315-NC191LT35-ND
SMDLTLFPT4-ND
315-NC191LT50-ND
SMD291SNLT4-ND
SMDLTLFP15T4-ND
315-EXB-SN99.3CU0.7-0.5LB-ND
72-T0051404399-ND
SMD291SNL15T4-ND
2260-SSLFNC-50G-ND
2260-SSLTNC-50G-ND
SMDLTLFP50T3-ND
72-T0051404799-ND
SMDLTLFPT5-ND
SMDAL10-ND
SMDAL50-ND
SMDLTLFP10T4-ND
SMD2028-25000-ND
315-CQ100GE35G-ND
SMD2020-25000-ND
315-NC191SNL35T5-ND
TS391SNL10-ND
315-NC191SNL50T5-ND
SMD4300SNL10T5-ND
72-T0051388199-ND
72-T0051386570-ND
315-SMD291SNLT6-ND
315-NC191SNL250-ND
82-126-ND
315-NC191LT250T5-ND
2260-WBRC96462-ND
SMDSWLF.0311LB-ND
82-108-ND
SMD2036-ND
SMDLTLFP250T5-ND
TS391LT500C-ND
SMD291SNL500T5-ND
117-70-5426-2410-ND
SMDCU100-S-1-ND
SMDSN100-S-1-ND
SMDBI100-S-1-ND
SMDSWLF.031.7OZ-ND
SMD2SWLF.020.4OZ-ND
RASWLF.020.4OZ-ND
SMD2SWLF.015.3OZ-ND
RASWLF.015.3OZ-ND
SMDSWLF.015.3OZ-ND
SMD2SWLF.0202OZ-ND
SMD2SWLF.0152OZ-ND
SMD2SWLF.0154OZ-ND
MA35232-ND
BARSN42BI57AG1-8OZ-ND
72-T0051402499-ND
SMDLTLFP60T4-ND
315-SMD3SWLT.0474OZ-ND
315-SMDSWLT.0474OZ-ND
315-CQ100GE250G-ND
315-EXB-SN96AG4-ND
SMD2SWLF.0151LB-ND
RASWLF.0208OZ-ND
315-REM8-ULTRA-NL-ND
315-SMD3SWLT.04050G-ND
SMDAL200-ND
72-T0051387599-ND
2260-SSLTNC-T5-250G-ND
NC3SWLF.0201LB-ND
72-T0051387899-ND
RASWLF.0201LB-ND
72-T0051387999-ND
TS391SNL500C-ND
72-T0051386199-ND
72-T0051386799-ND
SMD2028-ND
72-T0051386899-ND
72-T0051386399-ND
72-T0051386999-ND
72-T0051387299-ND
72-T0051386599-ND
SMDCU100-S-16-ND
2260-WBWSSAC20-1LB-ND
2260-SSLTNC-10G-SQ-ND
1188-SOLDERWIRESAC0307-0.8-ND
1188-SOLDERWIRESAC0307-0.6-ND
315-CQ100GE-ND
2260-SSLFNC-T5-250G-ND
2345-SR37-LFM23S-3.5-0.8MM-ND
2345-SR37-LFM23S-3.5-0.65MM-ND
2345-SR37-LFM23S-3.5-0.5MM-ND
2345-SR37-LFM48S-3.5-0.8MM-ND
2345-SR37-LFM48S-3.5-0.65MM-ND
2345-SR37-LFM48S-3.5-0.5MM-ND
2368-83-7068-1402-ND
3844-CCBLF22701020-ND
3844-RCBLF227L2031E-ND
3844-RCBLF227L2020P-ND
3844-RC9601020CQPJ-ND
3844-WCBLF22701031-ND
3844-WCBLF227L2031-ND
3844-RC9601062PSAC-ND
3844-WCBLF22701020-ND
3844-WCBLF22701062-ND
3844-CCBLF227L2020-ND
3844-CC96L2020ESAC-ND
3844-RCESZ2062E-ND
3844-CC9601020ESAC-ND
3844-WC96L2020P-ND
3844-CC96L2062E-ND
3844-CCBLF227L2062E-ND
3844-RCBLF227L2062E-ND
3844-RC96L2031EAG3-ND
3844-JPAGSC1501P-ND
3844-WCBLF227L2062E-ND
3844-CC9601062PSAC-ND
3844-CC96L2031E-ND
3844-RC9601031PSAC-ND
SMDSWLF.031 2OZ
SMDIN52SN48
CQ100GE.031 1LB
673828
733001
96-9574-9520
BARSN96.5AG3.0CU0.5
24-9574-7615
24-9574-7618
SMDSWLF.006 50G
90-7068-8850
24-9574-1400
91-7482-3340
44-9574-0050
24-9574-7609
96-9574-9525
4901-454G
673829
24-7068-7606
24-7068-1400
24-7068-6403
24-7068-6411
SMDSWLT.040 100G
24-7068-6417
24-7068-1404
24-7068-1402
24-7068-1401
24-7068-7607
24-7068-7617
24-7068-9716
24-7068-7601
44-7068-0000
24-7068-6409
24-7068-7603
24-7068-1406
24-7068-7608
24-7068-6401
1993881
24-7068-7618
96-7069-9531
96-7069-9520
96-7069-9525
24-7068-7610
96-7069-9540
96-7069-9515
SMD3SWLT.040 200G
SMDSWLT.040 200G
2041005
24-7068-7623
SMDIN66.3BI33.7
796037
SMDSWLT.047 8OZ
SMDSWLF.008 50G
WBRASAC20-1LB
1042097
96-9574-9515
WW100GE.031 1LB
EBSN96.5AG3
CWSN99.3 NCCW2.2 .015
CWSN99.3.062 1#
CWSN99.3 NCCW2.2 .032
CWSN99.3 WRMAP .062
CWSN99.3 NCCW2.2 .062
CW SN99.3 .032
CWSN99.3 WRMAP3 .032
CWSN99.3 WRAP3.015
CWSN99.3 WRMAP3 .015
CWSAC RA3% .032 1#
CWSAC NCCW2 .032 1#
24-9574-7619
CWSAC WRMAP3 .032
CWSAC WRMAP3 .062
SWSAC .032 1#SPL
CWSAC WRAP .015
CWSN96.5AG3
CWSAC NCCW2.2 .062
CWSAC WRMAP .015
CWSAC NC.015 1#
CWSnCu0.7Ni NCCW2.2% .032 1#
CWSnCu0.7Ni RA3% .062 1#
CWSnCu0.7Ni NCCW2.2% .062 1#
CWSnCu0.7Ni RMA3% .062 1#
CWSnCu0.7Ni RA3% .032 1#
CWSnCu0.7Ni RMA3% .032 1#
SWSAC .062 1#SPL
SW SAC305 .015 1#
SMD291SNL
TS391LT
SMD291SNL50T3
TS391SNL50
SMDIN97AG3
SMDLTLFP10
TS391LT50
SMD291SNL10
BARSN99.3CU0.7-8OZ
SMD4300SNL10
TS391LT10
4902P-25G
SMDLTLFP10T5
SMDSWLTLFP32
SMD291SNL10T5
SMDIN52SN48-R
70-1608-0820
SMD291SNL250T3
NC2SWLF.031 1LB
EXB-SN96.5AG3.0CU0.5
SMD291SNL250T4
SMD4300SNL250T4
TS391SNL250
SMDLTLFP250T3
SMDLTLFP250T4
TS391LT250
TS991SNL500T4
96-9574-9531
SMD291SNL250T5
70-4825-0904
93-7069-9510
733002
4900-454G
24-7068-6422
2003721
70-4823-0910
70-4021-1410
24-7068-7609
70-4823-0911
70-1903-0810
2041006
RASWLF.031 1OZ
RASWLF.015 1OZ
RASWLF.031 2OZ
SMDSWLF.031 1OZ
SMDSWLF.020 1OZ
SMDSWLF.015 1OZ
SMD2SWLF.020 1OZ
SMD2SWLF.015 1OZ
RASWLF.015 2OZ
SMD3SWLT.047 1OZ
WBWSSAC31-2OZ
WBNCSAC31-2OZ
SSLFNC-15G
SMD2SWLT.047 1OZ
NC191LT15T5
SMDSWLF.006 1G
WBWSSAC20-2OZ
WBNCSAC20-2OZ
SMDSWLT.047 1OZ
SMD2SWLF.031 2OZ
NC191SNL15T5
SMDSWLF.020 2OZ
SMDSWLF.015 2OZ
NC191SNL35
SMD3SWLT.040 10G
RASWLF.031 4OZ
T0051404699
SMD2SWLT.040 10G
SMDIN100
SMDSN60BI40
SMDSWLT.040 10G
SMDSWLF.006 2G
RASWLF.020 4OZ
SMD2060-25000
4902P-15G
SMD2055-25000
SMD2050-25000
RASWLF.015 4OZ
SMDSWLTLFP16
NC191LT35T5
4900-18G
SMD2040-25000
WBNCSAC31-4OZ
WBWSSAC31-4OZ
SMD291SNLT5
SMD2036-25000
SMD2SWLT.047 2OZ
SMD2032-25000
WBNCSAC20-4OZ
SMD2SWLF.020 4OZ
REM2.7-ULTRA-NL
SMDSWLT.047 2OZ
NC191LT50T5
SMD2024-25000
T0051404899
SMD291SNL10T4
SMDIN100-0.4MM
SMD2016-25000
SMDSWLF.006 5G
T0051402599
SMDSWLF.031 4OZ
SMDSWLF.020 4OZ
SMDSWLF.015 4OZ
SMD4300SNL10T4
SMD3SWLT.040 20G
SMD2SWLT.040 20G
T0051388299
T0051388499
EXB-SN96.5AG3.0CU0.5-0.5LB
SMDSWLT.040 20G
SMDSN100-S-16
EXB-SN99.3CU0.7
SMD2SWLF.031 8OZ
SMD2SWLF.020 8OZ
BARSN96.5AG3.0CU0.5-8OZ
SMD2SWLF.015 8OZ
T0051388399
4900P-25G
SMDSN90AU10-2FT
SMDSWLF.006 10G
SMD2SWLF.012 100G
4901-112G
SMD2SWLT.047 4OZ
SMD291SNL60T4
REM4.5-ULTRA-NL
BARSN42BI57AG1
4900-112G
SMD4300SNL250T3
T0051388799
SMDSWLF.031 8OZ
RASWLF.031 8OZ
SMDSWLF.020 8OZ
NC191LT250
SMDSWLF.015 8OZ
SMD2SWLF.031 1LB
70-1709-0820
SMDLTLFPT6
NC2SWLF.020 1LB
CQ100GE.020 1LB
SMDIN52SN48-1.69X5.71-R
SMDIN100-R
T0051388599
RASWLF.015 8OZ
4901-227G
T0051388699
T0051388899
T0051387399
T0051387499
SMD2SWLT.040 50G
SMDSWLT.040 50G
865940
NC3SWLF.031 1LB
T0051387699
WBWSSAC31-1LB
WBRASAC31-1LB
NCSWLF.031 1LB
NC191SNL250T5
NCSWLF.020 1LB
WBRC9645
RASWLF.031 1LB
SMDSWLF.020 1LB
SMDSWLF.015 1LB
RASWLF.015 1LB
SMD291SNL50T6
4900-227G
SMD4300SNL250T5
SMD4300LTLFP250T4
TS991SNL500T3
673832
WS991LT500T4
673831
SMD3SWLT.040 100G
SMDLTLFP50T6
SMD2SWLT.040 100G
SMD2032
SMD2024
SMD2020
SMD2016
49500WS-454G
4900P-250G
T0051386499
2023641
70-5306-2410
SMD2SWLT.040 200G
70-4021-0811
70-5426-2411
SMDSWLF.020 .4OZ
SMD2SWLF.031 1OZ
WBRASAC31-2OZ
SMDAG100-S-0.25
SMD3SWLT.047 2OZ
SMD2SWLF.031 4OZ
WBWSSAC20-4OZ
WBNCSAC31-35G
WBAR4257/1-1/2LB
SMDIN100-S-1
S200
SMDAG100-S-1
WBARS99.3/.7
SMD2SWLF.020 1LB
SMD3SWLT.047 8OZ
SMD2SWLT.047 8OZ
SSLTNC-250G
T0051387799
WBNCSAC32
T0051388099
SMDSWLF.059 3.3 1LB
SMD2040
T0051386299
T0051386699
T0051386099
SMDLTLFP500T3C
T0051387099
REM32-ULTRA-NL
WBARS993/7-1/2LB
WBARSAC-1/2LB
WBENVIRO
WB964
WBNCSAC20
SMD-SC-SN99.3CU0.7-0.031-1OZ
SMD-SC-SN96AG4-0.031-1OZ
SMD-SC-SAC305-0.031-1OZ
SMD-SC-SAC405-0.031-1OZ
2591111
2591112
2370856
WS991LT500T4C
CQ-SS-SAC405-0.30MM-25000
CQ-SS-SAC405-0.50MM-25000
CQ-SS-SAC405-0.60MM-25000
SMDAU80SN20-3INCH-0.762MM
721471
2472657
CS-PBF1
EBSN99.3CU.7 1#
RC96L2062PSAC
70-1608-0904
REM16-ULTRA-NL
275501
EBSnCu0.7Ni 1#TRI
NC191LT10
SMDLTLFP
TS391SNL
BARSN99.3CU0.7
WBRC96432
24-9574-1402
WS991SNL500T4
96-9574-9540
2023628
24-7068-7615
70-3213-0810
RASWLF.020 1OZ
SMD2SWLF.031 .7OZ
T0051404999
RASWLF.031 .7OZ
NC191LT15
RASWLF.020 2OZ
NC191SNL15
NC191SNL50
SSLTNC-15G
SMDAL
NC191LT35
SMDLTLFPT4
NC191LT50
SMD291SNLT4
SMDLTLFP15T4
EXB-SN99.3CU0.7-0.5LB
T0051404399
SMD291SNL15T4
SSLFNC-50G
SSLTNC-50G
SMDLTLFP50T3
T0051404799
SMDLTLFPT5
SMDAL10
SMDAL50
SMDLTLFP10T4
SMD2028-25000
CQ100GE 35G
SMD2020-25000
NC191SNL35T5
TS391SNL10
NC191SNL50T5
SMD4300SNL10T5
T0051388199
T0051386570
SMD291SNLT6
NC191SNL250
796065
NC191LT250T5
WBRC96462
SMDSWLF.031 1LB
732998
SMD2036
SMDLTLFP250T5
TS391LT500C
SMD291SNL500T5
70-5426-2410
SMDCU100-S-1
SMDSN100-S-1
SMDBI100-S-1
SMDSWLF.031 .7OZ
SMD2SWLF.020 .4OZ
RASWLF.020 .4OZ
SMD2SWLF.015 .3OZ
RASWLF.015 .3OZ
SMDSWLF.015 .3OZ
SMD2SWLF.020 2OZ
SMD2SWLF.015 2OZ
SMD2SWLF.015 4OZ
35232
BARSN42BI57AG1-8OZ
T0051402499
SMDLTLFP60T4
SMD3SWLT.047 4OZ
SMDSWLT.047 4OZ
CQ100GE 250G
EXB-SN96AG4
SMD2SWLF.015 1LB
RASWLF.020 8OZ
REM8-ULTRA-NL
SMD3SWLT.040 50G
SMDAL200
T0051387599
SSLTNC-T5-250G
NC3SWLF.020 1LB
T0051387899
RASWLF.020 1LB
T0051387999
TS391SNL500C
T0051386199
T0051386799
SMD2028
T0051386899
T0051386399
T0051386999
T0051387299
T0051386599
SMDCU100-S-16
WBWSSAC20-1LB
SSLTNC-10G-SQ
SOLDER WIRE SAC0307-0.8
SOLDER WIRE SAC0307-0.6
CQ100GE
SSLFNC-T5-250G
SR37-LFM23S-3.5-0.8MM
SR37-LFM23S-3.5-0.65MM
SR37-LFM23S-3.5-0.5MM
SR37-LFM48S-3.5-0.8MM
SR37-LFM48S-3.5-0.65MM
SR37-LFM48S-3.5-0.5MM
83-7068-1402
CCBLF22701020
RCBLF227L2031E
RCBLF227L2020P
RC9601020CQPJ
WCBLF22701031
WCBLF227L2031
RC9601062PSAC
WCBLF22701020
WCBLF22701062
CCBLF227L2020
CC96L2020ESAC
RCESZ2062E
CC9601020ESAC
WC96L2020P
CC96L2062E
CCBLF227L2062E
RCBLF227L2062E
RC96L2031EAG3
JPAGSC1501P
WCBLF227L2062E
CC9601062PSAC
CC96L2031E
RC9601031PSAC