Technical Parameters Product Name: ABB CM‑MSE Thermistor Motor Protection Relay Product Type: Temperature monitoring / motor protection relay Sensor Type: PTC thermistor temperature input Output Contact: 1 normally open (1 N/O) contact Rated Switching Capacity: Up to 250 V AC at 4 A (typical) Control Supply Voltage Options: Common versions include 110–130 V AC, 220–240 V AC, and 24 V AC (model‑dependent) Output Contact Configuration: Single SPST (single pole, single throw) normally open Function: Monitors motor temperature via PTC sensors and triggers output on trip condition Automatic Reset: Yes (relay can reset automatically once normal conditions return) Mounting: DIN‑rail (35 mm) mounting for control cabinets Terminal Type: Screw terminals for power and sensor connections Dimensions (approximate): Width ~22.5 mm, Height ~78 mm, Depth ~78.5 mm Housing Protection: Standard industrial enclosure (IP20 at terminals) Operating Temperature Range: Approximately –20 °C to +60 °C Connection Wire Size: Supports typical industrial wire sizes (stranded with ferrules or solid) Weight: Around 100–120 g Standards & Compliance: Designed to meet relevant IEC/EN standards for monitoring relays and immunity/EMC requirements Typical Applications: • Overtemperature protection for motors with PTC sensors • Motor control panels and automation systems • Industrial machinery where thermal monitoring and motor protection are needed