ABB Temperature Monitoring Relay With SPDT Contacts, 24 → 240 V ac/dc

  • RS Stock No. 876-4989
  • Mfr. Part No. 1SVR740720R1400
  • Manufacturer ABB
Technical data sheets
Legislation and Compliance
RoHS Certificate of Compliance
Product Details

CM-MSS Thermistor Motor Protection Relays

Heavy duty starting
Increased switching frequency
High ambient temperature
Insufficient cooling
Break operation

The CM range of thermistor motor protection relays are used to control motors equipped with PTC temperature sensors. The PTC temperature sensors are incorporated in the motor windings to measure the motor heating. This enables direct control and evaluation of the following operating conditions:

Main features include:
Dynamic interrupted wire detection
Wide control supply voltage rang 24-240 V AC/DC
Short circuit monitoring of the sensor circuit
Non-volatile fault storage
Remote reset
Screw connection technology or Easy Connect Technology available

Single Sensor Input Version
Wire Break Detection

Technical Specification
Manufacturer Part No. Supply Voltage Output Manual Reset Remote Reset Test Button Stock Number
1SVR430800R9100 24Vac/dc 1NO No No No 464-518
1SVR430801R1100 220-240Vac 1NO No No No 464-520
1SVR430810R9300 24Vac/dc 2CO Yes Yes No 464-570
1SVR430811R0300 110-130Vac 2CO Yes Yes No 464-574
1SVR430811R1300 220-240Vac 2CO Yes Yes No 464-568
1SVR430711R0300 110-130Vac 2CO Yes Yes Yes 464-564
1SVR430711R2300 380-440Vac 2CO Yes Yes Yes 464-558
1SVR430720R0400 24-240Vac/dc 1NO 1NC Yes Yes Yes 464-552
1SVR430720R0300 24-240Vac/dc 2CO Yes Yes Yes 464-546


Some products also have the ATEX approval for the use in hazardous areas.

Attribute Value
Monitoring Application Temperature
Supply Voltage 24 → 240 V ac/dc
Contact Configuration SPDT
Time Delay <100 ms
Temperature Sensitivity Overtemperature, Winding Temperature
Height 85.6mm
Operating Temperature Range -25 → +60 °C
Mounting Type DIN Rail, Snap-In
Length 103.7mm
Special Features Fail-Safe, Inbuilt PTC Sensor, Insufficient Cooling Protection, Manual & Automatic Reset, Non-Volatile Fault Storage, One Measuring Circuit, Over Heating Protection, Over Load Protection, Remote Reset, Short-Circuit Monitoring of the Sensor Circuit, Test
Series CM-MSS
Current Range Maximum of 3.7 mA
Width 22.5mm
Terminal Type Push In
Standards Met ATEX, CB Scheme, CCC, CE, CULus, EAC, EMC, GL, IEC/EN 60255-1, IEC/EN 60947-8, RCM, RoHS
Dimensions 103.7 x 22.5 x 85.6 mm
Minimum Operating Temperature -25°C
Maximum Operating Temperature +60°C
2 In stock for delivery within 5 working day(s)
Price (ex. GST) Each
$ 168.77
(exc. GST)
$ 185.65
(inc. GST)
Per unit
1 +
Related Products
Liquid Level Relays are used to monitor the ...
Liquid Level Relays are used to monitor the levels of conductive liquids, and are available in Up/Down, Minimum, Maximum, and Fill/Empty variations. Liquid Level Relays are straightforward to install and safe to use. The level control relays RM35 LM33MW and ...
The HSV relay controls the speed (or, more ...
The HSV relay controls the speed (or, more strictly speaking, the operating rate, or frequency) of a process (moving walkway, conveyor) using discrete sensors. It can be used to monitor under OR overspeed. Control of overspeed, underspeed, operating rate, stopping ...
Extremely simple operation with no complex menuHigh-end evaluation ...
Extremely simple operation with no complex menuHigh-end evaluation units with digital display suitable for wide temperature ranges & variety of sensor typesSettable hysteresisFast troubleshooting by detecting wire breakageRelay configuration: SPCO; SPNO.
Mainly used for asynchronous motors (cage rotors) on ...
Mainly used for asynchronous motors (cage rotors) on a single-phase or 3-phase network with significantly changing loadsThe internal electrical isolation of the supply and measuring circuits means it can be used in networks that are separatedMonitors the load status of ...