Contactor & Control Relay Overloads

Contactor and control overload relays protect machinery from overheating, this includes the machine itself and the bearings, gears and coolants as the relay receives the corresponding signal and trips.


What is a Contactor and Control Overload Relay?


Often referred to as an overload relay, our generous range of contactor and control relay overloads offer users motor control within a multitude of environments.


It is important for users to have sufficient motor protection; electrical motors can be operated safely with the assistance of overload relays. They are predominantly designed for imitating the heating prototypes.


Within our range of contactor and control relay overloads, we feature thermal overload relays. A thermal overload relay is a protective device which cuts the power whenever the motor uses too much current for a long period of time.


These devices are directly related to circuit breakers, in design and in application. The difference being that a circuit breaker will disturb the circuit if an overload occurs for just a second, whereas a thermal overload will cut the power after a prolonged period of time.


Applications of a Contactor and Control Overload Relay


  • The majority of the time is to protect a motor

  • To detect both overload conditions and fault conditions to then announce trip command for a protective device

  • To deactivate a device whenever it pulls high current

  • Sometimes developed into microprocessor systems and solid-state electronics

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Description Price FLC Motor Rating Control Voltage Contact Current Rating Pole Configuration Range Contact Voltage Rating Mounting Style Interface Supply Voltage Series Normal State Configuration Number Of Auxiliary Contacts Power Rating Reset Method
RS Stock No. 638-7432
Mfr. Part No.3RB2056-1FC2
BrandSiemens
£159.05
Each
Units
50 → 200 A - 315 A 3P Sirius Classic 1 kV ac Direct Contactor - - 3RB2 NO/NC 2 90 kW Automatic, Manual
RS Stock No. 735-2787
Mfr. Part No.3TH2031-0BB4
BrandSiemens
£51.33
Each
Units
- - 4 A - SIRIUS Innovation 660 V ac - - - 3TH2 3NO/1NC 4 - -
RS Stock No. 706-1601
Mfr. Part No.3RU2126-1CB0
BrandSiemens
£39.37
Each
Units
1.8 → 2.5 A - 2.5 A 3P Sirius Innovation 690 V ac Direct Contactor - - 3RU NO/NC 2 1.5 kW Automatic, Manual
RS Stock No. 746-0743
Mfr. Part No.3RH2131-1BB40
BrandSiemens
£26.10
Each
Units
- - 10 A - SIRIUS Innovation 690 V ac - - - 3RH2 3NO/1NC 4 - -
RS Stock No. 746-5918
Mfr. Part No.3TX7002-1AB00
BrandSiemens
£43.21
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 246-4765
Mfr. Part No.3RU1146-4JB0
BrandSiemens
£89.46
Each
Units
45 → 63 A - 63 A 3P Sirius Classic 1 kV ac Direct Contactor - - 3RU NO/NC 2 30 kW Automatic, Manual
RS Stock No. 746-0737
Mfr. Part No.3RH2122-1BB40
BrandSiemens
£26.10
Each
Units
- - 10 A - SIRIUS Innovation 690 V ac - - - 3RH2 2NO/2NC - - -
RS Stock No. 746-0733
Mfr. Part No.3RH2122-1AP00
BrandSiemens
£22.56
Each
Units
- - 10 A - SIRIUS Innovation 690 V ac - - - 3RH2 2NO/2NC - - -
RS Stock No. 746-0768
Mfr. Part No.3RH2140-1BB40
BrandSiemens
£26.10
Each
Units
- - 10 A - SIRIUS Innovation 690 V ac - - - 3RH2 4NO 4 - -
RS Stock No. 706-1532
Mfr. Part No.3RU2116-1BB0
BrandSiemens
£29.66
Each
Units
1.4 → 2 A - 2 A 3P Sirius Innovation 690 V ac Direct Contactor - - 3RU NO/NC 2 0.75 kW Automatic, Manual
RS Stock No. 746-0730
Mfr. Part No.3RH2122-1AF00
BrandSiemens
£22.56
Each
Units
- - 10 A - SIRIUS Innovation 690 V ac - - - 3RH2 2NO/2NC - - -
RS Stock No. 706-0762
Mfr. Part No.3RB3016-1SB0
BrandSiemens
£52.43
Each
Units
3 → 12 A - 12 A 3P Sirius Innovation 690 V ac Direct Contactor - - 3RB NO/NC 2 5.5 kW Automatic, Manual
RS Stock No. 246-4721
Mfr. Part No.3RU1136-4FB0
BrandSiemens
£75.21
Each
Units
28 → 40 A - 40 A 3P Sirius Classic 690 V ac Direct Contactor - - 3RU NO/NC 2 18.5 kW Automatic, Manual
RS Stock No. 735-2796
Mfr. Part No.3TH2262-0BB4
BrandSiemens
£69.35
Each
Units
- - 4 A - SIRIUS Innovation 500 V ac - - - 3TH2 6NO/2NC 8 - -
RS Stock No. 706-1557
Mfr. Part No.3RU2116-1DB0
BrandSiemens
£29.66
Each
Units
2.2 → 3.2 A - 3.2 A 3P Sirius Innovation 690 V ac Direct Contactor - - 3RU NO/NC 2 1.1 kW Automatic, Manual
RS Stock No. 746-0761
Mfr. Part No.3RH2140-1BF40
BrandSiemens
£26.10
Each
Units
- - 10 A - SIRIUS Innovation 690 V ac - - - 3RH2 4NO 4 - -
RS Stock No. 243-6849
Mfr. Part No.3RU1116-1BB0
BrandSiemens
£36.61
Each
Units
1.4 → 2 A - 2 A 3P Sirius Classic 690 V ac Direct Contactor - - 3RU NO/NC 2 0.75 kW Automatic, Manual
RS Stock No. 746-0759
Mfr. Part No.3RH2140-1AP00
BrandSiemens
£22.56
Each
Units
- - 10 A - SIRIUS Innovation 690 V ac - - - 3RH2 4NO 4 - -
RS Stock No. 243-6833
Mfr. Part No.3RU1116-1AB0
BrandSiemens
£40.27
Each
Units
1.1 → 1.6 A - 1.6 A 3P Sirius Classic 690 V ac Direct Contactor - - 3RU NO/NC 2 0.55 kW Automatic, Manual
RS Stock No. 243-6928
Mfr. Part No.3RU1116-1JB0
BrandSiemens
£36.61
Each
Units
7 → 10 A - 10 A 3P Sirius Classic 690 V ac Direct Contactor - - 3RU NO/NC 2 4 kW Automatic, Manual