From Kemet:
C-Specs
C-Specs are 4-digit codes found at the end of a part number which specify things like reeling, ESR ratings or special testing. These are internal codes to KEMET and may not appear on a customer’s BOM. However, they do appear on labels and can cause confusion at receiving. Below are a number of KEMET
C-specs (Customer Specifications) which are commonly used.
Note: KEMET allows distributors and customers to use TR for specifying tape and reel or TU for ceramic chips, specifying tape/unmarked. When these abbreviations are used, the KEMET system will automatically apply the appropriate 4-digit code.
Example: C0805C103K5RACTU = C0805C103K5RAC7800 (7800 = standard tape & reel)
ESR rating example: T520D337M004ATE012 (E for ESR, 012 = 12mOhm)
Commercial Ceramic Chips
C-Spec | Marked | Description |
---|---|---|
7800 | 7025 | 7" Reel, Plastic Tape C0805-C2225 (C0201-C0603 use paper Tape) Typ 4k/reel |
7210 | 7215 | 13" Reel Plastic Tape C0805-C2225 (C0201-C0603 use paper Tape) Typ 10k/reel |
7867 | 7013 | 7" Paper Tape C0201-C2225 Typ 4k/reel |
7411 | 7040 | 13" Paper Tape C0201-C2225 Typ 10k/reel |
Txxx | See Above | 7" Reels for smaller quantities: Use T+QTY: T500 or T1K0=1k reel |
9019 | N/A | C0402=50k/Cassette, C0603=15k/cassette |
3946 | N/A | 100 pcs on strip of tape with feeder tape on each end(for auto insertion) |
3810 | N/A | All ceramic p/ns except military. This covers values not included in 3946. Bagged |
*Some Quantities can vary for further information see MFG datasheet. |
Commercial Tantalum Chips
C-Spec | Marked | Description |
---|---|---|
N/A | Standard | 7" reel for T49x, T510, T520, T530, T540 Case Size A&B=2000, C, D & X =500 |
7280 | Standard | 13" reel: T49x, T5xx, Case Size A=9000, B=8000, C=3000, D=2500, X=2000 |
Txxx | Standard | 7"reels for smaller quantities use: T+ATy T100 or T1K0 for 1k |
Exxx | Standard | For T493, T495, T496, T498, T499, T520, T521, T522, T530, T545. ESR ratings are called out (E+ESR rating) example: E040 = ESR of 40 mOhms; E1K5 = 1500 mOhms |
4394 | Standard | 20 piece increments on a strip of tape |
*Tantalum chip (SMD) come on a 7" reel as a standard, so no reeling spec is necessary. |
Ceramic Leaded Capacitors
C-Spec | Marked | Description |
---|---|---|
7200 | Standard | Axial: C41x, C420, C430, C440, C1xx, C2xx, CK12, CKR11 - CK16, CKR11 - CKR16 |
7301 7303 |
Standard | Radial: C3xx, C05x, C06x, MIL-C-11015, MIL-PRF-39014, CKR |
9248 | Standard | Radial: C31x, C32x, C33x, C34x, C35x |
Tantalum Leaded Capacitors
C-Spec | Marked | Description |
---|---|---|
7200 | Standard | Axial: T110, T140, T2xx, T32x, CSR, CSS, CX01/05, MIL-PRF-39003 |
7301 7303 |
Standard | Radial: T330, T340, T35x, T36x, CX02/09, T37x, CX06, MIL-PRF-49137 |
Common Military C-Specs
C-Spec | Marked | Description |
---|---|---|
7185 | Standard | 100 pieces per 7" reel. One date code per reel. One year date code |
7189 | Standard | 7" reel. One date code per reel (does not specify full reel increment only) |
7370 | Standard | 7" reel. Full reel increments as designated by chip size. One date code per reel |
7956 | Standard | Single date lot code per reel |
7505 | Standard | Single date/lot code per line item |
7513 | Standard | Single date/lot code per item + one year date code restriction |
Dxxx | Standard | 7" Reels for non-standard quantities, D+QTY: D100=100 pcs/reel |
4250 4251 |
Standard | Special surge testing |
6110 6420 |
Standard | ESR screening and surge testing |
7502 | Standard | Group A/C Test Data - Additional Charge Likely |