Crompton – 252-PMMG – Thermistor Monitoring Relay 115 V 60 Hz, 5 A SPDT

The Crompton ‑PMMG is a DIN-rail mount thermistor monitoring relay for detecting motor winding or bearing temperatures via PT/thermistor sensors. It features a single-pole double-throw output that trips upon exceeding ~ Ω (i.e., over-temperature), with manual reset between – Ω. Suitable for industrial control panels, HVAC systems, or marine applications.

Key Features:

• Model: ‑PMMG (Crompton Instruments B.V.)  

• Supply:  V AC,  Hz ()

• Trip Threshold: ~ Ω, reset range – Ω (ANSI Device No. )  

• Contact: SPDT, rated  A @  VAC &  V DC  

• Function: De-energizes on trip with manual reset—relay-on-trip logic  

• Mounting: DIN-rail ready, ~ g  

• Includes: Reset dial, isolated coil terminals, power-fault detection