ABB, CM-MSS.21P series, thermal motor protection relay, order code 1SVR740722R1400, current lifecycle stage.
| Parameter | Value |
|---|---|
| Estimated lead time | 4 - 6 weeks. |
This relay mounts on a DIN rail inside the motor control center. It connects between the contactor and the motor — the thermal replica circuit inside measures motor current via the built-in CTs and trips the relay if the thermal load exceeds the set point. For a panel OEM wireman, that means one less device to wire: no separate current transformer, no external overload relay. The CM-MSS.21P handles the protection logic in a single package.
Estimated lead time is 4 to 6 weeks. Availability and current pricing are confirmed at quote time against an RFQ through our distribution channel.
It is a thermal motor protection relay (CM-MSS.21P) that protects three-phase motors against overload and phase loss by tracking the motor's thermal replica curve. It mounts on a DIN rail and integrates directly between the contactor and motor without requiring external current transformers.
This part is sourced and quoted to order against an RFQ through independent industrial automation distribution. Availability and current pricing are confirmed at quote time.
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