Pollak 21-487 Precision Ball Switch – Normally Open (NO), Screw Terminals

Heavy-Duty Versatility with Secure Screw Terminal Connectivity

The Pollak 21-487 Precision Ball Switch is a rugged, high-reliability sensing solution built for the toughest environments in the transportation and industrial sectors. This Normally Open (NO) switch is engineered to provide precise electrical engagement, making it a critical component for systems that require dependable "on-demand" activation.

Designed for Custom Wiring & Easy Maintenance Unlike sealed or plug-in models, the 21-487 features exposed screw terminals. This design allows for maximum flexibility, enabling technicians to create custom wire terminations or perform quick field repairs without the need for specialized mating connectors. The secure screw-down connection ensures high conductivity and vibration resistance for long-haul performance.

Built to Withstand the Elements Whether utilized for neutral sensing, backup lamps, or PTO interlocks, this switch is designed to last. With a mechanical life of 1,000,000 cycles and a wide operating temperature range of -40°F to +250°F, the 21-487 provides consistent performance in engine compartments, transmissions, and under-chassis applications.

Key Specifications:

• Circuitry: Normally Open (NO)

• Termination: Exposed Screw Terminals

• Thread Size: 9/16-18

• Hex Size: 7/8"

• 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

• Installation: Includes O-ring for a secure, leak-proof seal.