956-4154 - 956 Heavy Duty Series

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Littelfuse Ignition Switches are designed for universal applications within harsh environments. Their mounting, body, and actuator features are designed for ease-of-use and extended product lifecycle.

The 956 Heavy Duty Series is our most robust series of Ignition Switches, providing reliable circuit control for vehicle ignition.

Features and Benefits
  • Key removable in “Off” Position Only (where actuator applicable)
  • Ignition Proof to SAE J259
  • 5 screw terminals.
  • Coded lock & keys.
  • Gasket-sealed, Shutter lock seal, O-ring seal in stem.
  • Ground terminal.
  • 1"-24 bushing.
  • Off-Ign/Acc-Ign/Start. Spring return to Ign/Acc. Key removable at Off.
  • Ratings at 12V DC: 10A Accessory, 10A Ignition, 5A Start, 1A Ground.
Property (Mouseover for details) Value
Description Heavy Duty Ignition and Start Switch
Heavy Duty Ignition
Number of Positions 4
With anti-restart No
Actuator Key
Positions Acc - Off - Ign/Acc - Start
Spring return to Off Spring Return to Ign
Terminals 5 screw
O-Ring seal in stem No
Accessory 10A/12V DC
With harness No
With key boot No
Ignition/Run 10A/12V DC
Start 5A/12V DC
Removeable Actuator Position Key Removeable in Off Position Only
Case material Plated Steel
Sealed terminal insulator No
Ground terminal Yes
Mounting stem 1 (25.4mm)
Ground 1A/12V DC
Contact Materials Copper
Ignition-Proof SAE J259