Pollak 21-554 Precision Ball Switch – Normally Closed (NC), Sealed Terminals (Fits WP 12015792) – Retail Packaged

Professional-Grade Reliability in a Ready-to-Install Package

The Pollak 21-554 Precision Ball Switch is a premium sensing solution engineered for the high-intensity demands of the heavy-duty trucking and industrial sectors. This Normally Closed (NC) switch remains in a closed-circuit state until the ball plunger is depressed, making it the essential choice for safety interlocks, neutral sensing, and specialized limit switching where "break-on-contact" functionality is required.

Weatherproof Protection for Harsh Environments

Built to survive where standard switches fail, the 21-554 features sealed terminals and an integrated O-ring seal. This construction provides a watertight and dust-proof barrier, protecting internal electrical contacts from the corrosive effects of 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.

Retail Packaged for Quality Assurance

The 21-554 is the retail-packaged version of the 21-538, ensuring the part arrives protected and is easy to identify for inventory management. Built with a rugged, corrosion-resistant body, it operates reliably in extreme temperatures ranging from -40°F to +250°F and features a mechanical life of 1,000,000 cycles.