This Product Selection Guide contains information to help select products in the Surge Protection Devices (SPDs) category on DigiKey.com
Surge Protection Devices are designed to prevent a temporary surge of power on an AC or DC power line.
SelectionCharacteristics
Type: Indicates the type, typically meets a standard.
Form: Indicates whether the device is a module only, or whether it also comes with a mounting base for affixing to a larger system.
Number of Poles: The number of individual channels the device can provide independent protection to.
Voltage - Continuous Operating (Max) (MCOV): The maximum voltage level the part should be exposed to during normal, continuous operation.
Current - Discharge (Nom) (8/20µS): Indicates the nominal specified amount of surge current the part can dissipate or discharge during a surge event. Specified according to ANSI standardized surge profiles, which last between eight and twenty microseconds.
Current - Discharge (Max) (8/20µS): Indicates the maximum amount of surge current the part can dissipate withouor discharge during a surge event without suffering damage. Specified according to ANSI standardized surge profiles, which last between eight and twenty microseconds.
Current - Short Circuit Rating (SCCR): Indicates the maximum current value the SPD can be subjected to while still safely disconnecting from a power source.
Voltage - Protection Rating (VPR): The average voltage to which the SPD will limit a surge to. Can be thought of as the SPD’s clamping voltage.
Voltage - Protection Level (VP) (2416): The maximum voltage the SPD will hold itself to when subjected to its nominal discharge current.
Operating Temperature: Recommended operating temperature, typically given in a range or as a maximum. Exceeding these temperatures may affect performance or damage the device and other system components.
Features: These are different capabilities or properties of the device such as remote signaling contacts, thermally protected, and visual life indicator.
Mounting Type: Indicates how the device is attached.
Approval Agency: An indication that the product meets the minimum safety standards of an approving agency. These agencies are either government entities or private third-party labs that protect consumer safety.
ProductExamples
| MFR PART # | LSP10120S |
|---|---|
| DIGIKEY PART # | F6374-ND |
| MANUFACTURER | Littelfuse Inc. |
| DESCRIPTION | LIGHTING SURGE PROTECT 120V SCRW |
| DATASHEET | Click Here |
| MFR PART # | BSP3-277 |
|---|---|
| DIGIKEY PART # | 1121-1010-ND |
| MANUFACTURER | Thomas Research Products |
| DESCRIPTION | LIGHTING SURGE PROTECTOR 277V |
| DATASHEET | Click Here |
| MFR PART # | 1250-2S-120 |
|---|---|
| DIGIKEY PART # | 1250-2S-120-ND |
| MANUFACTURER | Bourns Inc. |
| DESCRIPTION | SPD AC 2W+G 120VAC |
| DATASHEET | Click Here |
| MFR PART # | SPD-20-240P |
|---|---|
| DIGIKEY PART # | 1866-4817-ND |
| MANUFACTURER | MEAN WELL USA Inc. |
| DESCRIPTION | LIGHTING SURGE PROTECT 240V SCRW |
| DATASHEET | Click Here |
MediaLinks
Videos
Bourns Surge Protection Device (SPD) Disconnect
SPD – Type 2 - Surge Protection Devices
Articles
How to Apply Hybrid AC Surge Protection Devices for Improved Surge Protection
Product Training Modules
Surge Protection for Industrial - Littelfuse
Blogs
DIN Rail Mountable Surge Protection Devices