Pollak 21-495 Precision Ball Switch – Normally Closed (NC), Sealed Terminals (Fits WP 12015792)

Rugged Precision for Critical Sensing Applications

The Pollak 21-495 Precision Ball Switch is a professional-grade electrical component designed for the extreme demands of the heavy truck, agricultural, and industrial sectors. This Normally Closed (NC) switch remains in a closed-circuit state until the ball plunger is depressed, making it ideal for safety interlocks, neutral sensing, and specialized lamp switching where reliable "break-on-contact" performance is required.

Sealed Against the Elements Engineered for longevity in harsh environments, the 21-495 features sealed terminals and an integrated O-ring assembly. This design provides a watertight and dust-proof seal, protecting internal contacts from road salt, moisture, and grime. It is specifically designed to mate with the Packard Weather Pack (WP 12015792) connector, ensuring a secure, vibration-resistant connection that meets OEM standards.

Industrial-Strength Durability Built with a cold-rolled steel body and zinc plating with a chromate coating, this switch is designed to withstand the high-heat and high-vibration conditions found in engine compartments and chassis mounting. With a mechanical life of 1,000,000 cycles, the 21-495 is a reliable solution that reduces vehicle downtime and maintenance costs.

Key Specifications:

• Circuitry: Normally Closed (NC)

• Termination: Sealed Terminals (Mates with WP 12015792)

• Connector Type: Packard Weather Pack

• Voltage Rating: 5.0 - 24.0 VDC

• Current Rating: 0.01 - 5.0 DC Amp

• Operating Temperature: -40°F to +250°F (-40°C to +121°C)

• Cycle Life: 500,000 Electrical / 1,000,000 Mechanical

• Construction: Zinc-plated steel with O-ring seal for environmental resistance