Pollak 21-547 Precision Ball Switch – Normally Closed (NC), Sealed Terminals (Fits 1530002)

Rugged Performance for High-Integrity Vehicle Systems

The Pollak 21-547 Precision Ball Switch is a heavy-duty sensing solution engineered for the demanding environments of the trucking, agricultural, and construction industries. This Normally Closed (NC) switch remains in a closed-circuit state until the ball plunger is depressed, making it the ideal choice for safety interlocks, neutral sensing, and specialized lighting controls that require "break-on-contact" functionality.

Sealed for Maximum Reliability Designed to thrive where standard switches fail, the 21-547 is equipped with 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 connector 1530002, ensuring a professional-grade, vibration-resistant connection.

Industrial-Strength Engineering Pollak is an industry leader in precision switching, and the 21-547 is built to prove it. Constructed with a rugged, corrosion-resistant body, this switch is designed to operate in extreme temperatures ranging from -40°F to +250°F. With an exceptional mechanical life of 1,000,000 cycles, this component is built to reduce downtime and ensure your equipment stays on the road longer.

Key Specifications:

• Circuitry: Normally Closed (NC)

• Termination: Sealed Terminals (Mates with 1530002)

• 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

• Seal Type: Encapsulated with O-ring for environmental protection.