Building the emergency stop directly into a control panel's door you're already assembling with other 22mm components (like the selector switch in this same ranking), instead of a separate stop station.
22mm Panel Mount
Mushroom Head
2NC
660V/10A
What is it and what's it for?
It's the same principle as any emergency stop: a button that, when pressed, opens a normally-closed contact wired in series with the contactor's or starter's coil, cutting the control circuit (not motor power) to de-energize everything at once. This model's difference is the reset style: push-twist, you have to turn the head (not just pull it) to release it after a stop, which keeps someone from accidentally reactivating it by brushing against it.
Real-world use cases
At home
In a home context this almost never comes up — it's a safety part for equipment with moving parts or motors, not common appliances.
In a business or workshop
In this catalog's VFD control panel, this button (or the BAOMAIN separate-box one, depending on the enclosure layout) wires in series with the soft starter's start coil — pressing it cuts the control circuit regardless of which position the mode selector in this same ranking is set to.
How to avoid buying the wrong one
It's 2NC (normally closed) — check that your starter/contactor expects a normally-closed contact in the stop circuit, not a normally-open one.
The reset is push-twist, not push-pull — some operators expect to pull the head to release it; this model releases by twisting, so call that out in equipment training.
With fewer reviews than the BAOMAIN in this catalog, it isn't the first choice if track record matters more than mounting format — pick this only if you specifically need the 22mm panel-mount version.
The investment takeaway
At $9.99 it's the cheapest emergency stop in this catalog, but with a thinner track record (87 reviews, 4.3 stars) than the BAOMAIN (422 reviews, 4.4 stars) — the price difference doesn't pay off unless your installation specifically needs the 22mm panel-mount format instead of the separate box.
Supports all three serial standards (RS232/485/422) on one device, so it works for both old instruments with an RS232 port and multi-device RS485 buses. PoE power is a real plus in installations where there's no outlet near the panel — a single Ethernet cable carries both data and power. Confirm whether your Modbus master needs TCP Server or Client mode before buying; the mode is set in software, it doesn't come fixed from the factory.
Single-phase input to 220V three-phase output — the typical choice for workshops without a three-phase feed that want to run a 3-phase motor. This is an entry-level model (2HP/1.5kW), meant for spindles and small CNC motors, not large industrial loads. The output range up to 3000Hz is only useful if your specific spindle takes advantage of it — for a standard 60Hz motor it's irrelevant.
Has vector control (not just scalar V/F), which holds torque better at low RPM — important if you'll be threading or cutting at reduced speed. At 5HP/4kW it covers larger motors than the entry-level model, and accepts both single-phase and three-phase input, giving flexibility depending on the electrical setup available. Rated up to 26A — confirm your wiring and breakers can handle that current before installing.
