Pollak 31-273 4-Position Ignition Switch - 7-Blade Terminals, Various Keyed

Enhanced Connectivity for Modern Fleet & Industrial Equipment

The Pollak 31-273 Ignition Switch is a high-capacity, 4-position starter switch engineered for vehicles requiring extensive accessory circuits. Unlike standard 4-terminal switches, the 31-273 features a 7-blade terminal configuration, designed to interface seamlessly with complex wiring harnesses, including the standard Packard connector #2984017.

Rugged Construction for Demanding Environments Built with a durable zinc die-cast housing and a high-impact base, this switch is designed to withstand the heavy vibrations and mechanical stress common in commercial trucking and construction. It includes a momentary start function and is internally lubricated for a long service life of up to 50,000 cycles.

Advanced Environmental Protection To ensure reliability in all weather conditions, the 31-273 is equipped with an internal lip seal and a weather-resistant O-ring. These features create a barrier against moisture and dust, preventing corrosion of the solid copper contacts and ensuring consistent electrical performance.

Key Features:

• 4-Position Function: Accessory – Off – On/Run – Start (Momentary).

• 7-Blade Terminals: Ideal for use with Packard connectors and complex electrical systems.

• Various Keyed: Provides unique key security (not keyed alike) for added vehicle protection.

• Weatherproof Design: Includes a protective lip seal and O-ring to keep out environmental contaminants.

• Industrial Strength: Solid copper contacts and zinc die-cast housing for maximum conductivity and durability.

Technical Specifications:

• Part Number: 31-273 (Pollak Aftermarket)

• Switch Positions: 4 (Acc-Off-On-Start)

• Terminal Type: 7 Blade Terminals (Type 7 Base)

• Keying: Various Key Codes (Provides security for individual units)

• Housing Material: Die-Cast Zinc

• Base Material: High-Impact Plastic (Fits Packard Connector #2984017)

• Mounting Hole Pattern: Pattern 5 (Standard 1" Bushing)

• Current Rating (at 14V DC): Ignition: 8A | Accessory: 30A | Start: 75A (Make) / 20A (Break)

• Typical Applications: Heavy-Duty Trucks, Agricultural Equipment, Construction Vehicles, and Marine Applications.