Pollak 31-540 3-Position Ignition Starter Switch – 4 Stud Terminals – Keyed Alike D250 – Heavy-Duty Zinc Die-Cast

Professional-Grade Security with High-Vibration Reliability

The Pollak 31-540 3-Position Ignition Switch is the ideal choice for heavy-duty vehicle maintenance and fleet standardization. Engineered for durability, this switch features a rugged one-piece zinc die-cast housing designed to withstand the harsh environments of the construction, agricultural, and trucking industries.

This model is equipped with 4 threaded stud terminals, providing a superior electrical connection that resists loosening due to constant vibration—making it a significant upgrade over standard blade-style switches. Keyed Alike to the D250 code, it allows fleet operators to maintain a single key standard across multiple machines, significantly simplifying equipment management.

Key Features & Benefits:

• 3-Position Logic: Easy operation with Off – On/Accessory – Start (Momentary Start) positions.

• 4 Stud Terminals: Threaded studs with nuts/washers ensure a permanent, high-torque connection that won't vibrate loose on the job site.

• D250 Keyed Alike: Pre-keyed to the industry-standard D250 code, perfect for mixed fleets or rental equipment.

• Heavy-Duty Construction: Features solid copper contacts and brass terminals for maximum conductivity and long service life.

• Environmental Protection: Includes an internal O-ring seal and a lip seal to block out moisture, dust, and grime from the contact chamber.

• Rugged Housing: The one-piece zinc die-cast body offers superior resistance to mechanical wear and impact.

Technical Specifications:

• Part Number: 31-540 (Retail: 31-540P)

• Positions: 3 (Off-On/Acc-Start)

• Terminals: 4 Stud Terminals

• Rating: 12V DC, 30A (Typical)

• Key Code: D250 (Includes 2 Keys)

• Mounting: 1" Diameter Threaded Stem (Standard Pattern 4)

• Material: Zinc Die-Cast