When a limit switch stops clicking, you have two choices: hunt down an exact replacement or risk a mismatch that leads to repeated downtime. The Square D 9007-CO3 is a no-nonsense candidate in the relay, contactor, and industrial switch space, so let's see if its specs actually line up with your application.
Quick Verdict
The Square D 9007-CO3 is a 10A, 600VAC snap action limit switch with a double-pole double-break contact setup. At $52.89, it's a new open-box unit, meaning the box has been opened but the switch itself is not used. If your circuit needs two independent poles switched by one mechanical plunger, this is a strong candidate.
Who It Suits
This switch fits anyone maintaining commercial equipment that uses limit switches for position sensing or interlock circuits. The AWG 22 to 14 wire range covers typical control wiring, and the brown housing with black plunger makes it simple to identify in a crowded panel. What you're getting is a mechanically actuated switch, not a coil-driven device.
What Stands Out From the Listed Details
The DPDT-DB (Double Pole Double Throw, Double Break) Form ZZ contact arrangement is the standout feature. With two poles and double-break contacts, one plunger can switch two separate circuits at the same time, and do it with a physical opening at two points per pole. The 10A rating at 600VAC gives you real switching capacity for motors or pilot loads. Add in the fact that it's manufactured in the United States, and it's a solid pick for domestic projects.
Square D 9007-CO3 Industrial Basic Snap Action Limit Switch
The listed price of $52.89 positions it as a practical replacement part for commercial control systems. The coil voltage is Not Applicable (0 Volts), which confirms it's not a relay or contactor-there's no coil to energize. Everything is driven by the mechanical plunger on the brown housing.
Meaningful Trade-Offs
The most obvious trade-off is the open-box condition. If your facility requires factory-sealed packaging for parts inventory, you'll want to confirm that's acceptable before purchasing. Also, because it's a snap action limit switch, it needs physical actuation-don't expect to wire it like a relay and get switching from a control signal. The wire range is limited to AWG 22 to 14, so it's not suited for heavier power wiring.
Bottom Line
The Square D 9007-CO3 is a capable limit switch for commercial switching jobs. The open-box condition is the only real compromise to weigh. If the mechanical actuation fits how your equipment works, this is a sensible replacement part.
