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SIRIUS 2 Contactors

Siemens SIRIUS 2 Contactors provide switching with high contact reliability, prolonged endurance, and usability in extreme conditions. The comprehensive SIRIUS 2 lineup includes 3RT devices that offer up to 2650A switching without current derating, even at an ambient temperature of +55°C. Siemens SIRIUS 2 Contactors comply with all major standards and certificates, making them suitable for a variety of applications.

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Part #

Contactors - Electromechanical CONTACTOR S0 38A 110VAC 1NO/1NC SCRW

3RT20281AF00
Siemens
1: $368.407
5In Stock

Mfr. Part #
3RT20281AF00

Mouser Part #
982-3RT20281AF00

Siemens

Contactors - Electromechanical CONTACTOR S0 38A 110VAC 1NO/1NC SCRW

Datasheet

5In Stock

$368.407

$368.397

Min.: 1
Mult.: 1

Contactors - Electromechanical CONTACTOR S0 38A 120VAC 1NO/1NC SCRW

3RT20281AK60
Siemens
1: $361.098
6In Stock

Mfr. Part #
3RT20281AK60

Mouser Part #
982-3RT20281AK60

Siemens

Contactors - Electromechanical CONTACTOR S0 38A 120VAC 1NO/1NC SCRW

Datasheet

6In Stock

$361.098

$321.502

$316.285

Min.: 1
Mult.: 1

Contactors - Electromechanical CONTACTOR S0 38A 24VDC 1NO/1NC SCRW

3RT20281BB40
Siemens
1: $521.575
5In Stock

Mfr. Part #
3RT20281BB40

Mouser Part #
982-3RT20281BB40

Siemens

Contactors - Electromechanical CONTACTOR S0 38A 24VDC 1NO/1NC SCRW

Datasheet

5In Stock

$521.575

$464.363

$454.057

Min.: 1
Mult.: 1

Contactors - Electromechanical CONTACTOR S0 38A 24VDC 1NO/1NC SPRG

3RT20282BB40
Siemens
1: $521.575
5In Stock

Mfr. Part #
3RT20282BB40

Mouser Part #
982-3RT20282BB40

Siemens

Contactors - Electromechanical CONTACTOR S0 38A 24VDC 1NO/1NC SPRG

Datasheet

5In Stock

$521.575

$472.977

Min.: 1
Mult.: 1

Contactors - Electromechanical CONTACTOR S2 40A 120VAC SCREW 1NO/1NC

3RT20351AK60
Siemens
1: $341.263
13In Stock
10Expected 8/25/2026

Mfr. Part #
3RT20351AK60

Mouser Part #
982-3RT20351AK60

Siemens

Contactors - Electromechanical CONTACTOR S2 40A 120VAC SCREW 1NO/1NC

Datasheet

13In Stock

10Expected 8/25/2026

$341.263

$304.769

Min.: 1
Mult.: 1

Contactors - Electromechanical CONTACTOR S2 40A 24VDC SCREW 2NO/2NC

3RT20351KB443MA0
Siemens
1: $490.109
4In Stock

Mfr. Part #
3RT20351KB443MA0

Mouser Part #
982-3RT20351KB443MA0

Siemens

Contactors - Electromechanical CONTACTOR S2 40A 24VDC SCREW 2NO/2NC

Datasheet

4In Stock

$490.109

$445.328

Min.: 1
Mult.: 1

Contactors - Electromechanical CONTACTOR S2 40A 20-33VUC SCREW 1NO/1NC

3RT20351NB30
Siemens
1: $456.802
4In Stock

Mfr. Part #
3RT20351NB30

Mouser Part #
982-3RT20351NB30

Siemens

Contactors - Electromechanical CONTACTOR S2 40A 20-33VUC SCREW 1NO/1NC

Datasheet

4In Stock

$456.802

$412.704

$394.026

Min.: 1
Mult.: 1

Contactors - Electromechanical CONTACTOR S2 50A 120VAC SCREW 1NO/1NC

3RT20361AK60
Siemens
1: $372.035
6In Stock

Mfr. Part #
3RT20361AK60

Mouser Part #
982-3RT20361AK60

Siemens

Contactors - Electromechanical CONTACTOR S2 50A 120VAC SCREW 1NO/1NC

Datasheet

6In Stock

$372.035

$340.979

$325.551

Min.: 1
Mult.: 1

Contactors - Electromechanical CONTACTOR S2 50A 230VAC SCREW 1NO/1NC

3RT20361AP00
Siemens
1: $370.142
19In Stock

Mfr. Part #
3RT20361AP00

Mouser Part #
982-3RT20361AP00

Siemens

Contactors - Electromechanical CONTACTOR S2 50A 230VAC SCREW 1NO/1NC

Datasheet

19In Stock

$370.142

$369.722

Min.: 1
Mult.: 1

Contactors - Electromechanical CONTACTOR S2 50A 24VDC SCREW 1NO/1NC

3RT20361KB40
Siemens
1: $493.621
4In Stock

Mfr. Part #
3RT20361KB40

Mouser Part #
982-3RT20361KB40

Siemens

Contactors - Electromechanical CONTACTOR S2 50A 24VDC SCREW 1NO/1NC

Datasheet

4In Stock

$493.621

$430.415

$410.937

Min.: 1
Mult.: 1

Contactors - Electromechanical CONTACTOR S2 50A 20-33VUC SPRING 1NO/1NC

3RT20363NB30
Siemens
1: $488.742
4In Stock

Mfr. Part #
3RT20363NB30

Mouser Part #
982-3RT20363NB30

Siemens

Contactors - Electromechanical CONTACTOR S2 50A 20-33VUC SPRING 1NO/1NC

Datasheet

4In Stock

$488.742

$488.731

Min.: 1
Mult.: 1

Contactors - Electromechanical CONTACTOR S2 65A 24VAC SCREW 1NO/1NC

3RT20371AC20
Siemens
1: $519.651
4In Stock

Mfr. Part #
3RT20371AC20

Mouser Part #
982-3RT20371AC20

Siemens

Contactors - Electromechanical CONTACTOR S2 65A 24VAC SCREW 1NO/1NC

Datasheet

4In Stock

$519.651

$471.410

Min.: 1
Mult.: 1

Contactors - Electromechanical CONTACTOR S2 65A 20-33VUC SCREW 1NO/1NC

3RT20371NB30
Siemens
1: $610.075
3In Stock

Mfr. Part #
3RT20371NB30

Mouser Part #
982-3RT20371NB30

Siemens

Contactors - Electromechanical CONTACTOR S2 65A 20-33VUC SCREW 1NO/1NC

Datasheet

3In Stock

$610.075

$560.656

Min.: 1
Mult.: 1

Contactors - Electromechanical CONTACTOR S2 65A 24VDC SPRING 1NO/1NC

3RT20373KB40
Siemens
1: $613.872
3In Stock

Mfr. Part #
3RT20373KB40

Mouser Part #
982-3RT20373KB40

Siemens

Contactors - Electromechanical CONTACTOR S2 65A 24VDC SPRING 1NO/1NC

Datasheet

3In Stock

$613.872

$560.656

Min.: 1
Mult.: 1

Contactors - Electromechanical CONTACTOR S2 65A 120VAC SCREW 1NO/1NC

3RT20381AK60
Siemens
1: $578.819
5In Stock

Mfr. Part #
3RT20381AK60

Mouser Part #
982-3RT20381AK60

Siemens

Contactors - Electromechanical CONTACTOR S2 65A 120VAC SCREW 1NO/1NC

Datasheet

5In Stock

$578.819

$529.621

Min.: 1
Mult.: 1

Contactors - Electromechanical CONTACTOR S2 65A 24VDC SCREW 1NO/1NC

3RT20381KB40
Siemens
1: $648.283
4In Stock

Mfr. Part #
3RT20381KB40

Mouser Part #
982-3RT20381KB40

Siemens

Contactors - Electromechanical CONTACTOR S2 65A 24VDC SCREW 1NO/1NC

Datasheet

4In Stock

$648.283

$591.071

Min.: 1
Mult.: 1

Contactors - Electromechanical CONTACTOR S2 65A 20-33VUC SCREW 1NO/1NC

3RT20381NB30
Siemens
1: $657.380
3In Stock

Mfr. Part #
3RT20381NB30

Mouser Part #
982-3RT20381NB30

Siemens

Contactors - Electromechanical CONTACTOR S2 65A 20-33VUC SCREW 1NO/1NC

Datasheet

3In Stock

$657.380

$657.370

Min.: 1
Mult.: 1

Contactors - Electromechanical CONTACTOR.AC3:37KW.110VAC 50HZ/120V 60HZ

3RT20451AK60
Siemens
1: $928.811
3In Stock

Mfr. Part #
3RT20451AK60

Mouser Part #
982-3RT20451AK60

Siemens

Contactors - Electromechanical CONTACTOR.AC3:37KW.110VAC 50HZ/120V 60HZ

Datasheet

3In Stock

$928.811

$839.291

Min.: 1
Mult.: 1

Contactors - Electromechanical COUPL. CONT.. AC3:37KW. 1NO+1NC. 24VDC

3RT20451KB40
Siemens
1: $1.212.704
3In Stock

Mfr. Part #
3RT20451KB40

Mouser Part #
982-3RT20451KB40

Siemens

Contactors - Electromechanical COUPL. CONT.. AC3:37KW. 1NO+1NC. 24VDC

Datasheet

3In Stock

$1.212.704

$1.121.870

Min.: 1
Mult.: 1

Contactors - Electromechanical CONTACTOR AC3 45KW 110VAC

3RT20461AK60
Siemens
1: $1.192.743
5In Stock

Mfr. Part #
3RT20461AK60

Mouser Part #
982-3RT20461AK60

Siemens

Contactors - Electromechanical CONTACTOR AC3 45KW 110VAC

Datasheet

5In Stock

$1.192.743

$1.104.391

Min.: 1
Mult.: 1

Contactors - Electromechanical CONTACTOR RES S00 18A 24VDC 4NO SCRW

3RT23161BB40
Siemens
1: $145.428
20In Stock

Mfr. Part #
3RT23161BB40

Mouser Part #
982-3RT23161BB40

Siemens

Contactors - Electromechanical CONTACTOR RES S00 18A 24VDC 4NO SCRW

Datasheet

20In Stock

$145.428

$135.679

$125.130

$120.829

Min.: 1
Mult.: 1

Contactors - Electromechanical CONTACTOR RES S0 30A 24VDC 5NO/1NC SCRW

3RT23251BB40
Siemens
1: $357.070
7In Stock

Mfr. Part #
3RT23251BB40

Mouser Part #
982-3RT23251BB40

Siemens

Contactors - Electromechanical CONTACTOR RES S0 30A 24VDC 5NO/1NC SCRW

Datasheet

7In Stock

$357.070

$326.445

$311.668

Min.: 1
Mult.: 1

Contactors - Electromechanical CONTACTOR RES S0 35A 24VDC 5NO/1NC SCRW

3RT23261BB40
Siemens
1: $424.630
5In Stock

Mfr. Part #
3RT23261BB40

Mouser Part #
982-3RT23261BB40

Siemens

Contactors - Electromechanical CONTACTOR RES S0 35A 24VDC 5NO/1NC SCRW

Datasheet

5In Stock

$424.630

$384.204

$366.819

Min.: 1
Mult.: 1

Contactors - Electromechanical CONTACTOR RES S0 42A 120VAC 5NO/1NC SCRW

3RT23271AK60
Siemens
1: $400.400
5In Stock

Mfr. Part #
3RT23271AK60

Mouser Part #
982-3RT23271AK60

Siemens

Contactors - Electromechanical CONTACTOR RES S0 42A 120VAC 5NO/1NC SCRW

Datasheet

5In Stock

$400.400

$356.470

$340.337

Min.: 1
Mult.: 1

Contactors - Electromechanical CONTACTOR.AC1:140A. 24VAC 50/60HZ

3RT24461AC20
Siemens
1: $975.664
3In Stock

Mfr. Part #
3RT24461AC20

Mouser Part #
982-3RT24461AC20

Siemens

Contactors - Electromechanical CONTACTOR.AC1:140A. 24VAC 50/60HZ

Datasheet

3In Stock

$975.664

$894.010

Min.: 1
Mult.: 1