Square D 9007MS05S0300 Limit Switch Spdt Nc Cat Whisker

Product Description

The SQUARE D 9007MS05S0300 is a general purpose limit switch designed for industrial and commercial machine control applications. It uses a cat whisker actuator mounted at the top of the metal body, with a single-pole double-throw (SPDT) contact form in a normally closed (NC) configuration. The switch arrives prewired for fast installation and carries an IP54 ingress protection rating, meaning it resists dust ingress and water splashing from any direction. It operates reliably across a wide temperature range of -40 degrees F to 220 degrees F, making it suitable for both cold storage environments and high-heat industrial settings. Licensed electricians and controls technicians are the primary installers for this device.

This limit switch is used in machine tool, conveyor, and automated equipment applications where a mechanical actuator must signal a control circuit. The cat whisker actuator style responds to light contact from moving parts, making it a good fit for detecting object presence, end-of-travel positions, and door or guard interlock circuits. It is equally applicable in residential elevator controls, HVAC damper position feedback, and light industrial automation panels. Its NEMA 1, 12, and 13 ratings cover general indoor use, protection against circulating dust and dripping non-corrosive liquids, and oil-splash environments respectively.

Key Features

• Cat whisker actuator, top-mounted, for light-force mechanical actuation
• SPDT contact form with normally closed (NC) configuration
• IP54 ingress protection rating for dust and water splash resistance
• Metal body construction for durability in industrial environments
• Prewired terminal type for faster field installation
• Wide operating temperature range: -40 degrees F to 220 degrees F
• NEMA 1, 12, and 13 rated enclosure compatibility

Compatibility

Designed as an OEM-style replacement or direct-install general purpose limit switch for industrial machine control panels and automated equipment requiring a top-mounted cat whisker SPDT limit switch.

Installation Notes

Installation should be performed by a licensed electrician or qualified controls technician in accordance with the National Electrical Code (NEC) and any applicable local codes. De-energize all circuits and follow lockout/tagout (LOTO) procedures before mounting or wiring the switch. Verify that the actuator alignment with the target object produces consistent, repeatable actuation without over-travel that could damage the whisker. Prewired leads should be routed and secured away from sharp edges and heat sources before restoring power.