Industrial Automation – Mouser United Kingdom

.hide-partial { max-height: none; } .show-more { display: none; }

SIRIUS 3RH2 4- & 8-Pole Contactor Relays

Siemens SIRIUS 3RH2 4- and 8-Pole Contactor Relays are available with screw or spring-loaded terminals. The basic unit contains four contacts with terminal designations according to EN 50011. Siemens 3RH2 Contactor Relays feature high contact stability at low voltages and currents. This performance is suitable for solid-state circuits with currents ≥1mA at a voltage of ≥17V. 3RH21 Coupling Contactor Relays for Switching Auxiliary Circuits are tailored to the special requirements of working with electronic controls.

.catnav-wrapper { height: auto; overflow: visible; } .catalog-nav-tabs ul { white-space: normal; }

Types of Industrial Automation

List Images

Results: 79

Search within results

In Stock

Normally Stocked

Active

New Products

RoHS Compliant

.search-refine-wrapper { display: inline-block; min-width: 100%; } .scroll-body { overflow-x: visible; } .search-table-wrapper { overflow: visible; } .hide-partial { max-height: none; } .show-more { display: none; }

Part #

Control Switches AUX. SWITCH 1NO+3NC FOR S00 SCREW

3RH29111HA13
Siemens
1: £35.37
4In Stock

Mfr. Part No.
3RH29111HA13

Mouser Part No
982-3RH29111HA13

Siemens

Control Switches AUX. SWITCH 1NO+3NC FOR S00 SCREW

Learn More

Datasheet

4In Stock

£35.37

£31.89

£30.47

£29.42

View

Min.: 1
Mult.: 1

Control Switches AUX. SWITCH 2NO FOR S0 SCREW

3RH29111HA20
Siemens
1: £22.60
9In Stock

Mfr. Part No.
3RH29111HA20

Mouser Part No
982-3RH29111HA20

Siemens

Control Switches AUX. SWITCH 2NO FOR S0 SCREW

Learn More

Datasheet

9In Stock

£22.60

£21.10

£19.75

£19.07

View

Min.: 1
Mult.: 1

Control Switches AUX. SWITCH 3NO+1NC FOR S00 SCREW

3RH29111HA31
Siemens
1: £35.58
23In Stock

Mfr. Part No.
3RH29111HA31

Mouser Part No
982-3RH29111HA31

Siemens

Control Switches AUX. SWITCH 3NO+1NC FOR S00 SCREW

Learn More

Datasheet

23In Stock

£35.58

£31.56

£31.09

£29.42

View

Min.: 1
Mult.: 1

Control Switches AUX. SWITCH 1NO+1NC WIRE TOP SCREW

3RH29111LA11
Siemens
1: £24.05
5In Stock

Mfr. Part No.
3RH29111LA11

Mouser Part No
982-3RH29111LA11

Siemens

Control Switches AUX. SWITCH 1NO+1NC WIRE TOP SCREW

Learn More

Datasheet

5In Stock

£24.05

£21.63

£20.65

£19.94

View

Min.: 1
Mult.: 1

Control Switches AUXILIARY SWITCH 1NO+1NC

3RH29111MA11
Siemens
1: £25.04
9In Stock

Mfr. Part No.
3RH29111MA11

Mouser Part No
982-3RH29111MA11

Siemens

Control Switches AUXILIARY SWITCH 1NO+1NC

Learn More

Datasheet

9In Stock

£25.04

£21.76

£21.74

£21.00

View

Min.: 1
Mult.: 1

Control Switches AUX. SWITCH 2NC FOR S00 & S0 SCREW

3RH29111NF02
Siemens
1: £81.15
5In Stock

Mfr. Part No.
3RH29111NF02

Mouser Part No
982-3RH29111NF02

Siemens

Control Switches AUX. SWITCH 2NC FOR S00 & S0 SCREW

Learn More

Datasheet

5In Stock

£81.15

£80.66

£79.30

£78.43

View

Min.: 1
Mult.: 1

Control Switches AUX. SWITCH 1NO+1NC FOR S00 & S0 SCREW

3RH29111NF11
Siemens
1: £75.80
6In Stock

Mfr. Part No.
3RH29111NF11

Mouser Part No
982-3RH29111NF11

Siemens

Control Switches AUX. SWITCH 1NO+1NC FOR S00 & S0 SCREW

Learn More

Datasheet

6In Stock

£75.80

£68.64

£65.54

£63.28

£61.11

Min.: 1
Mult.: 1

Control Switches ACC CONTACTOR

3RH29112FA22
Siemens
1: £36.09
6In Stock

Mfr. Part No.
3RH29112FA22

Mouser Part No
982-3RH29112FA22

Siemens

Control Switches ACC CONTACTOR

Learn More

Datasheet

6In Stock

£36.09

£32.69

£31.21

£30.14

View

Min.: 1
Mult.: 1

Control Switches AUX. SWITCH 4NO FOR S00 & S0 SPRNG

3RH29112FA40
Siemens
1: £35.60
2In Stock

Mfr. Part No.
3RH29112FA40

Mouser Part No
982-3RH29112FA40

Siemens

Control Switches AUX. SWITCH 4NO FOR S00 & S0 SPRNG

Learn More

Datasheet

2In Stock

£35.60

£32.40

£30.90

£28.83

£27.69

Min.: 1
Mult.: 1

Control Switches AUX. SWITCH 4NC FOR S00 SPRING

3RH29112GA04
Siemens
1: £32.07
5In Stock

Mfr. Part No.
3RH29112GA04

Mouser Part No
982-3RH29112GA04

Siemens

Control Switches AUX. SWITCH 4NC FOR S00 SPRING

Learn More

Datasheet

5In Stock

£32.07

£31.20

£30.01

£29.10

£27.79

Min.: 1
Mult.: 1

Control Switches AUX. SWITCH 2NO+2NC FOR S00 SPRING

3RH29112GA22
Siemens
1: £25.91
4In Stock

Mfr. Part No.
3RH29112GA22

Mouser Part No
982-3RH29112GA22

Siemens

Control Switches AUX. SWITCH 2NO+2NC FOR S00 SPRING

Learn More

Datasheet

4In Stock

£25.91

£25.51

Min.: 1
Mult.: 1

Control Switches AUX. SWITCH 3NO+1NC FOR S00 SPRING

3RH29112GA31
Siemens
1: £32.69
5In Stock

Mfr. Part No.
3RH29112GA31

Mouser Part No
982-3RH29112GA31

Siemens

Control Switches AUX. SWITCH 3NO+1NC FOR S00 SPRING

Learn More

Datasheet

5In Stock

£32.69

£31.21

£30.14

£29.10

£27.79

Min.: 1
Mult.: 1

Control Switches AUX. SWITCH 1NO+2NC FOR S00 & S0 SPRNG

3RH29112HA12
Siemens
1: £30.01
6In Stock

Mfr. Part No.
3RH29112HA12

Mouser Part No
982-3RH29112HA12

Siemens

Control Switches AUX. SWITCH 1NO+2NC FOR S00 & S0 SPRNG

Learn More

Datasheet

6In Stock

£30.01

£27.10

£25.88

£24.98

View

Min.: 1
Mult.: 1

Control Switches AUX. SWITCH 2NO+2NC FOR S00 & S0 SPRNG

3RH29112HA22
Siemens
1: £36.52
6In Stock

Mfr. Part No.
3RH29112HA22

Mouser Part No
982-3RH29112HA22

Siemens

Control Switches AUX. SWITCH 2NO+2NC FOR S00 & S0 SPRNG

Learn More

Datasheet

6In Stock

£36.52

£32.67

£31.21

£30.14

View

Min.: 1
Mult.: 1

Control Switches AUX. SWITCH LATERAL 2NC S0 SCREW

3RH29211DA02
Siemens
1: £32.75
10In Stock

Mfr. Part No.
3RH29211DA02

Mouser Part No
982-3RH29211DA02

Siemens

Control Switches AUX. SWITCH LATERAL 2NC S0 SCREW

Learn More

Datasheet

10In Stock

£32.75

£31.58

£28.08

£27.12

View

Min.: 1
Mult.: 1

Control Switches AUX. SWITCH LATERAL 1NO+1NC S0 SCREW

3RH29211DA11
Siemens
1: £33.02
6In Stock

Mfr. Part No.
3RH29211DA11

Mouser Part No
982-3RH29211DA11

Siemens

Control Switches AUX. SWITCH LATERAL 1NO+1NC S0 SCREW

Learn More

Datasheet

6In Stock

£33.02

£29.41

£28.08

£27.12

View

Min.: 1
Mult.: 1

Control Switches AUX. SWITCH LATERAL 2NO S0 SCREW

3RH29211DA20
Siemens
1: £33.02
4In Stock

Mfr. Part No.
3RH29211DA20

Mouser Part No
982-3RH29211DA20

Siemens

Control Switches AUX. SWITCH LATERAL 2NO S0 SCREW

Learn More

Datasheet

4In Stock

£33.02

£29.41

£28.08

£27.12

View

Min.: 1
Mult.: 1

Contactors - Electromechanical CONTACTOR RELAY 2NO+2NC AC 120V SCREW

3RH21221AK60
Siemens
1: £85.41
34On Order

Mfr. Part No.
3RH21221AK60

Mouser Part No
982-3RH21221AK60

Siemens

Contactors - Electromechanical CONTACTOR RELAY 2NO+2NC AC 120V SCREW

Learn More

Datasheet

34On Order

£85.41

£76.09

£72.65

£70.15

£67.74

Min.: 1
Mult.: 1

Contactors - Electromechanical CONTACTOR RELAY 2NO+2NC AC 230V SCREW

3RH21221AP00
Siemens
1: £85.40
6Expected 04/03/2026

Mfr. Part No.
3RH21221AP00

Mouser Part No
982-3RH21221AP00

Siemens

Contactors - Electromechanical CONTACTOR RELAY 2NO+2NC AC 230V SCREW

Learn More

Datasheet

6Expected 04/03/2026

£85.40

£76.09

£72.65

£70.15

£67.74

Min.: 1
Mult.: 1

Contactors - Electromechanical CONTACTOR RELAY 6NO+2NC, 24VDC, SZ S00

3RH22621BB40
Siemens
1: £146.21
7Expected 19/03/2026

Mfr. Part No.
3RH22621BB40

Mouser Part No
982-3RH22621BB40

Siemens

Contactors - Electromechanical CONTACTOR RELAY 6NO+2NC, 24VDC, SZ S00

Learn More

Datasheet

7Expected 19/03/2026

£146.21

£130.18

£124.28

£120.01

Min.: 1
Mult.: 1

Control Switches CONTACTOR_AUX_AC

3RH29112HA11
Siemens
1: £21.14
7Expected 02/04/2026

Mfr. Part No.
3RH29112HA11

Mouser Part No
982-3RH29112HA11

Siemens

Control Switches CONTACTOR_AUX_AC

Learn More

Datasheet

7Expected 02/04/2026

£21.14

£19.23

£18.34

£17.11

£16.44

Min.: 1
Mult.: 1

Control Switches AUX. SWITCH 2NO FOR S0 SPRING

3RH29112HA20
Siemens
1: £17.98
6Expected 18/02/2026

Mfr. Part No.
3RH29112HA20

Mouser Part No
982-3RH29112HA20

Siemens

Control Switches AUX. SWITCH 2NO FOR S0 SPRING

Learn More

Datasheet

6Expected 18/02/2026

£17.98

£16.01

£15.29

£15.16

Min.: 1
Mult.: 1

Control Switches AUX. SWITCH 2NO+2NC FOR S00 & S0 SPRNG

3RH29112XA220MA0
Siemens
1: £35.45
6Expected 27/02/2026

Mfr. Part No.
3RH29112XA220MA0

Mouser Part No
982-3RH29112XA220MA0

Siemens

Control Switches AUX. SWITCH 2NO+2NC FOR S00 & S0 SPRNG

Learn More

Datasheet

6Expected 27/02/2026

£35.45

£31.91

£30.47

£29.42

View

Min.: 1
Mult.: 1

Contactors - Electromechanical CONTACTOR RELAY 2NO+2NC DC 125V SCREw

3RH21221BG40
Siemens
1: £107.96
Non-Stocked Lead-Time 6 Weeks

Mfr. Part No.
3RH21221BG40

Mouser Part No
982-3RH21221BG40

Siemens

Contactors - Electromechanical CONTACTOR RELAY 2NO+2NC DC 125V SCREw

Learn More

Datasheet

Non-Stocked Lead-Time 6 Weeks

£107.96

£96.13

£91.79

£88.62

Min.: 1
Mult.: 1

Contactors - Electromechanical CONTACTOR RELAY 3NO+1NC DC 125V SCREW

3RH21311BG40
Siemens
1: £107.91
Lead-Time 5 Weeks

Mfr. Part No.
3RH21311BG40

Mouser Part No
982-3RH21311BG40

Siemens

Contactors - Electromechanical CONTACTOR RELAY 3NO+1NC DC 125V SCREW

Learn More

Datasheet

Lead-Time 5 Weeks

£107.91

£96.13

£91.79

£88.62

Min.: 1
Mult.: 1

SIRIUS 3RH2 4- & 8-Pole Contactor Relays

Types of Industrial Automation

Customer Service Office

Company

Resources

Support