Contactors & Relays – Mouser United Kingdom

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.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (GBP) Filter the results in the table by unit price based on your quantity.	Qty.
Auxiliary Contacts AUX. SWITCH 3NO+1NC FOR S00 SPRING 3RH29112HA31 Siemens 1: £41.75 380In Stock	Mfr. Part No. 3RH29112HA31 Mouser Part No 982-3RH29112HA31	Siemens	Auxiliary Contacts AUX. SWITCH 3NO+1NC FOR S00 SPRING Learn More about Siemens 3rh2 contactor relays	Datasheet	380In Stock	£41.75 £40.45 £36.93 £31.95 View £29.82 £27.70	Min.: 1 Mult.: 1
Contactors - Electromechanical CONTACTOR RELAY 3NO+1NC DC 24V SPRING 3RH21312BB40 Siemens 1: £109.48 17In Stock	Mfr. Part No. 3RH21312BB40 Mouser Part No 982-3RH21312BB40	Siemens	Contactors - Electromechanical CONTACTOR RELAY 3NO+1NC DC 24V SPRING Learn More about Siemens 3rh2 contactor relays	Datasheet	17In Stock	£109.48 £98.70 £94.24 £90.51 View £84.50 Quote	Min.: 1 Mult.: 1
Auxiliary Contacts AUX. SWITCH 1NO+1NC FOR S00 & S0 SCREW 3RH29111HA11 Siemens 1: £25.09 113In Stock	Mfr. Part No. 3RH29111HA11 Mouser Part No 982-3RH29111HA11	Siemens	Auxiliary Contacts AUX. SWITCH 1NO+1NC FOR S00 & S0 SCREW Learn More about Siemens 3rh2 contactor relays	Datasheet	113In Stock	£25.09 £21.34 £19.82 £18.57 £17.34	Min.: 1 Mult.: 1
Contactors - Electromechanical CONTROL RELAY 7NO+1NC DC 24V SCREW 3RH22711BB40 Siemens 1: £161.71 6In Stock	Mfr. Part No. 3RH22711BB40 Mouser Part No 982-3RH22711BB40	Siemens	Contactors - Electromechanical CONTROL RELAY 7NO+1NC DC 24V SCREW Learn More about Siemens 3rh2 contactor relays	Datasheet	6In Stock	£161.71 £140.61 £134.24 £129.67 View Quote	Min.: 1 Mult.: 1
Contactors - Electromechanical CONTACTOR RELAY 4NO+4NC DC 24V SPRING 3RH22442BB40 Siemens 1: £141.09 5In Stock	Mfr. Part No. 3RH22442BB40 Mouser Part No 982-3RH22442BB40	Siemens	Contactors - Electromechanical CONTACTOR RELAY 4NO+4NC DC 24V SPRING Learn More about Siemens 3rh2 contactor relays	Datasheet	5In Stock	£141.09 £136.23	Min.: 1 Mult.: 1
Auxiliary Contacts SOLID-STATE COMP. AUX. SW.BL.. 2NO+2NC 3RH29111NE22 Siemens 1: £108.05 10In Stock	Mfr. Part No. 3RH29111NE22 Mouser Part No 982-3RH29111NE22	Siemens	Auxiliary Contacts SOLID-STATE COMP. AUX. SW.BL.. 2NO+2NC Learn More about Siemens 3rh2 contactor relays	Datasheet	10In Stock	£108.05 £106.52 £91.87 £82.23 View £76.38 Quote	Min.: 1 Mult.: 1
Contactors - Electromechanical CONTACTOR RELAY 4NO AC 120V SCREW 3RH21401AK60 Siemens 1: £94.25 8In Stock	Mfr. Part No. 3RH21401AK60 Mouser Part No 982-3RH21401AK60	Siemens	Contactors - Electromechanical CONTACTOR RELAY 4NO AC 120V SCREW Learn More about Siemens 3rh2 contactor relays	Datasheet	8In Stock	£94.25 £86.43 £82.52 £78.57 View £73.35 Quote	Min.: 1 Mult.: 1
Auxiliary Contacts AUX. SWITCH LATERAL 1NO+1NC S0 SCREW 3RH29211DA11 Siemens 1: £37.64 22In Stock	Mfr. Part No. 3RH29211DA11 Mouser Part No 982-3RH29211DA11	Siemens	Auxiliary Contacts AUX. SWITCH LATERAL 1NO+1NC S0 SCREW Learn More about Siemens 3rh2 contactor relays	Datasheet	22In Stock	£37.64 £36.66 £32.01 £28.63 View £26.72 £24.81 Quote	Min.: 1 Mult.: 1
Contactors - Electromechanical CONTACTOR RELAY 2NO+2NC DC 24V SCREW 3RH21221BB40 Siemens 1: £110.22 11In Stock 24Expected 28/10/2026	Mfr. Part No. 3RH21221BB40 Mouser Part No 982-3RH21221BB40	Siemens	Contactors - Electromechanical CONTACTOR RELAY 2NO+2NC DC 24V SCREW Learn More about Siemens 3rh2 contactor relays	Datasheet	11In Stock 24Expected 28/10/2026	£110.22 £98.65 £94.20 £90.99	Min.: 1 Mult.: 1
Contactors - Electromechanical CONTROL RELAY 7NO+1NC AC 120V SCREW 3RH22711AK60 Siemens 1: £150.64 5In Stock	Mfr. Part No. 3RH22711AK60 Mouser Part No 982-3RH22711AK60	Siemens	Contactors - Electromechanical CONTROL RELAY 7NO+1NC AC 120V SCREW Learn More about Siemens 3rh2 contactor relays	Datasheet	5In Stock	£150.64 £130.69 £124.82 £120.54 View Quote	Min.: 1 Mult.: 1
Contactors - Electromechanical CONTACTOR RELAY 2NO+2NC AC 120V SCREW 3RH21221AK60 Siemens 1: £94.23 22In Stock	Mfr. Part No. 3RH21221AK60 Mouser Part No 982-3RH21221AK60	Siemens	Contactors - Electromechanical CONTACTOR RELAY 2NO+2NC AC 120V SCREW Learn More about Siemens 3rh2 contactor relays	Datasheet	22In Stock	£94.23 £88.98 £82.52 £79.68	Min.: 1 Mult.: 1
Contactors - Electromechanical CONTACTOR RELAY 3NO+1NC DC 24V SCREW 3RH21311BB40 Siemens 1: £109.71 14In Stock	Mfr. Part No. 3RH21311BB40 Mouser Part No 982-3RH21311BB40	Siemens	Contactors - Electromechanical CONTACTOR RELAY 3NO+1NC DC 24V SCREW Learn More about Siemens 3rh2 contactor relays	Datasheet	14In Stock	£109.71 £98.70 £94.24 £90.99	Min.: 1 Mult.: 1
Auxiliary Contacts AUX. SWITCH 2NO+2NC FOR S00 & S0 SCREW 3RH29111HA22 Siemens 1: £40.62 54In Stock	Mfr. Part No. 3RH29111HA22 Mouser Part No 982-3RH29111HA22	Siemens	Auxiliary Contacts AUX. SWITCH 2NO+2NC FOR S00 & S0 SCREW Learn More about Siemens 3rh2 contactor relays	Datasheet	54In Stock	£40.62 £34.54 £32.20 £31.83 View Quote	Min.: 1 Mult.: 1
Contactors - Electromechanical CONTACTOR RELAY 2NO+2NC AC 24V SCREW 3RH21221AB00 Siemens 1: £95.65 6In Stock	Mfr. Part No. 3RH21221AB00 Mouser Part No 982-3RH21221AB00	Siemens	Contactors - Electromechanical CONTACTOR RELAY 2NO+2NC AC 24V SCREW Learn More about Siemens 3rh2 contactor relays	Datasheet	6In Stock	£95.65 £86.43 £82.52 £79.68	Min.: 1 Mult.: 1
Contactors - Electromechanical CONTACTOR RELAY 2NO+2NC AC 110V SCREW 3RH21221AF00 Siemens 1: £95.65 6In Stock	Mfr. Part No. 3RH21221AF00 Mouser Part No 982-3RH21221AF00	Siemens	Contactors - Electromechanical CONTACTOR RELAY 2NO+2NC AC 110V SCREW Learn More about Siemens 3rh2 contactor relays	Datasheet	6In Stock	£95.65 £86.43 £82.52 £79.68	Min.: 1 Mult.: 1
Contactors - Electromechanical CONTACTOR RELAY 2NO+2NC AC 230V SCREW 3RH21221AP00 Siemens 1: £95.65 3In Stock 3Expected 14/10/2026	Mfr. Part No. 3RH21221AP00 Mouser Part No 982-3RH21221AP00	Siemens	Contactors - Electromechanical CONTACTOR RELAY 2NO+2NC AC 230V SCREW Learn More about Siemens 3rh2 contactor relays	Datasheet	3In Stock 3Expected 14/10/2026	£95.65 £86.43 £82.52 £79.68	Min.: 1 Mult.: 1
Contactors - Electromechanical CONTACTOR RELAY 2NO+2NC AC 240V SCREW 3RH21221AP60 Siemens 1: £95.65 3In Stock 2Expected 30/10/2026	Mfr. Part No. 3RH21221AP60 Mouser Part No 982-3RH21221AP60	Siemens	Contactors - Electromechanical CONTACTOR RELAY 2NO+2NC AC 240V SCREW Learn More about Siemens 3rh2 contactor relays	Datasheet	3In Stock 2Expected 30/10/2026	£95.65 £86.43 £82.52 £79.68	Min.: 1 Mult.: 1
Contactors - Electromechanical CONTACTOR RELAY 2NO+2NC DC 110V SCREW 3RH21221BF40 Siemens 1: £109.71 4In Stock 1Expected 28/10/2026	Mfr. Part No. 3RH21221BF40 Mouser Part No 982-3RH21221BF40	Siemens	Contactors - Electromechanical CONTACTOR RELAY 2NO+2NC DC 110V SCREW Learn More about Siemens 3rh2 contactor relays	Datasheet	4In Stock 1Expected 28/10/2026	£109.71 £98.70 £94.24 £90.99	Min.: 1 Mult.: 1
Contactors - Electromechanical CONTACTOR RELAY 2NO+2NC DC 24V SPRING 3RH21222BB40 Siemens 1: £109.71 3In Stock 3Expected 30/11/2026	Mfr. Part No. 3RH21222BB40 Mouser Part No 982-3RH21222BB40	Siemens	Contactors - Electromechanical CONTACTOR RELAY 2NO+2NC DC 24V SPRING Learn More about Siemens 3rh2 contactor relays	Datasheet	3In Stock 3Expected 30/11/2026	£109.71 £98.70 £94.24 £90.99	Min.: 1 Mult.: 1
Contactors - Electromechanical COUPLING RELAY 2NO+2NC DC 24V SPRING 3RH21222HB40 Siemens 1: £109.94 3In Stock	Mfr. Part No. 3RH21222HB40 Mouser Part No 982-3RH21222HB40	Siemens	Contactors - Electromechanical COUPLING RELAY 2NO+2NC DC 24V SPRING Learn More about Siemens 3rh2 contactor relays	Datasheet	3In Stock	£109.94 £98.70 £94.24 £90.99	Min.: 1 Mult.: 1
Contactors - Electromechanical CONTACTOR RELAY 3NO+1NC AC 24V SCREW 3RH21311AB00 Siemens 1: £95.65 2In Stock 8Expected 23/10/2026	Mfr. Part No. 3RH21311AB00 Mouser Part No 982-3RH21311AB00	Siemens	Contactors - Electromechanical CONTACTOR RELAY 3NO+1NC AC 24V SCREW Learn More about Siemens 3rh2 contactor relays	Datasheet	2In Stock 8Expected 23/10/2026	£95.65 £86.43 £82.52 £79.68	Min.: 1 Mult.: 1
Contactors - Electromechanical CONTACTOR RELAY 3NO+1NC AC 110V SCREW 3RH21311AF00 Siemens 1: £95.65 3In Stock 3Expected 30/10/2026	Mfr. Part No. 3RH21311AF00 Mouser Part No 982-3RH21311AF00	Siemens	Contactors - Electromechanical CONTACTOR RELAY 3NO+1NC AC 110V SCREW Learn More about Siemens 3rh2 contactor relays	Datasheet	3In Stock 3Expected 30/10/2026	£95.65 £86.43 £82.52 £79.68	Min.: 1 Mult.: 1
Contactors - Electromechanical CONTACTOR RELAY 3NO+1NC AC 110V SCREW 3RH21311AK60 Siemens 1: £95.65 5In Stock	Mfr. Part No. 3RH21311AK60 Mouser Part No 982-3RH21311AK60	Siemens	Contactors - Electromechanical CONTACTOR RELAY 3NO+1NC AC 110V SCREW Learn More about Siemens 3rh2 contactor relays	Datasheet	5In Stock	£95.65 £86.43 £82.52 £79.68	Min.: 1 Mult.: 1
Contactors - Electromechanical CONTACTOR RELAY 3NO+1NC AC 220V SCREW 3RH21311AN20 Siemens 1: £95.51 5In Stock	Mfr. Part No. 3RH21311AN20 Mouser Part No 982-3RH21311AN20	Siemens	Contactors - Electromechanical CONTACTOR RELAY 3NO+1NC AC 220V SCREW Learn More about Siemens 3rh2 contactor relays	Datasheet	5In Stock	£95.51 £94.11 £91.32 £89.23 View Quote	Min.: 1 Mult.: 1
Contactors - Electromechanical CONTACTOR RELAY 3NO+1NC AC 230V SCREW 3RH21311AP00 Siemens 1: £95.65 6In Stock	Mfr. Part No. 3RH21311AP00 Mouser Part No 982-3RH21311AP00	Siemens	Contactors - Electromechanical CONTACTOR RELAY 3NO+1NC AC 230V SCREW Learn More about Siemens 3rh2 contactor relays	Datasheet	6In Stock	£95.65 £86.43 £82.52 £79.68	Min.: 1 Mult.: 1

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