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3RR2 Monitoring Relays

Siemens 3RR2 Monitoring Relays are designed for continuous supervision of motor currents and load conditions in industrial control panels. These relays are mounted directly onto RT2 contactors for compact motor starter assemblies. The 3RR2 monitoring relays detect various faults, including overcurrent, undercurrent, phase failure, cable breaks, current asymmetry, and blocked‑rotor conditions, to prevent machine damage and reduce downtime. These relays are available in three sizes: S00, S0, and S2. The 3RR2 monitoring relays are conceived for monitoring 3-phase systems.

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Part #

Industrial Relays CURR MON IO-LINK S0 4-40A 24VDC SCREW

3RR24421AA40
Siemens
1: HK$5,765.59
3In Stock

Mfr. Part No.
3RR24421AA40

Mouser Part No
982-3RR24421AA40

Siemens

Industrial Relays CURR MON IO-LINK S0 4-40A 24VDC SCREW

Datasheet

3In Stock

HK$5,765.59

HK$5,531.98

Min.: 1
Mult.: 1

Industrial Relays CURRENT MONITR S00 1.6-16A 24VUC SCREW

3RR21411AA30
Siemens
1: HK$2,007.49
Non-Stocked Lead-Time 3 Weeks

Mfr. Part No.
3RR21411AA30

Mouser Part No
982-3RR21411AA30

Siemens

Industrial Relays CURRENT MONITR S00 1.6-16A 24VUC SCREW

Datasheet

Non-Stocked Lead-Time 3 Weeks

HK$2,007.49

HK$1,909.51

HK$1,874.82

Min.: 1
Mult.: 1

Industrial Relays CURRENT MONITR S00 1.6-16A 24-240VUC SCW

3RR21411AW30
Siemens
1: HK$2,256.23
Non-Stocked Lead-Time 2 Weeks

Mfr. Part No.
3RR21411AW30

Mouser Part No
982-3RR21411AW30

Siemens

Industrial Relays CURRENT MONITR S00 1.6-16A 24-240VUC SCW

Datasheet

Non-Stocked Lead-Time 2 Weeks

HK$2,256.23

HK$2,145.75

HK$2,106.70

Min.: 1
Mult.: 1

Industrial Relays CURRENT MONITR S00 1.6-16A 24VUC SPRING

3RR21412AA30
Siemens
1: HK$2,007.49
Non-Stocked Lead-Time 2 Weeks

Mfr. Part No.
3RR21412AA30

Mouser Part No
982-3RR21412AA30

Siemens

Industrial Relays CURRENT MONITR S00 1.6-16A 24VUC SPRING

Datasheet

Non-Stocked Lead-Time 2 Weeks

HK$2,007.49

HK$1,909.51

HK$1,874.82

Min.: 1
Mult.: 1

Industrial Relays CURRENT MONITR S00 1.6-16A 24-240VUC SPG

3RR21412AW30
Siemens
1: HK$2,256.23
Non-Stocked Lead-Time 2 Weeks

Mfr. Part No.
3RR21412AW30

Mouser Part No
982-3RR21412AW30

Siemens

Industrial Relays CURRENT MONITR S00 1.6-16A 24-240VUC SPG

Datasheet

Non-Stocked Lead-Time 2 Weeks

HK$2,256.23

HK$2,145.75

HK$2,106.70

Min.: 1
Mult.: 1

Industrial Relays CURRENT MONITR S0 4-40A 24VUC SCREW

3RR21421AA30
Siemens
1: HK$2,385.36
Non-Stocked Lead-Time 2 Weeks

Mfr. Part No.
3RR21421AA30

Mouser Part No
982-3RR21421AA30

Siemens

Industrial Relays CURRENT MONITR S0 4-40A 24VUC SCREW

Datasheet

Non-Stocked Lead-Time 2 Weeks

HK$2,385.36

HK$2,270.28

HK$2,238.96

Min.: 1
Mult.: 1

Industrial Relays CURRENT MONITR S0 4-40A 24-240VUC SCREW

3RR21421AW30
Siemens
1: HK$2,594.81
Non-Stocked Lead-Time 3 Weeks

Mfr. Part No.
3RR21421AW30

Mouser Part No
982-3RR21421AW30

Siemens

Industrial Relays CURRENT MONITR S0 4-40A 24-240VUC SCREW

Datasheet

Non-Stocked Lead-Time 3 Weeks

HK$2,594.81

HK$2,470.93

HK$2,437.48

Min.: 1
Mult.: 1

Industrial Relays CURRENT MONITR S0 4-40A 24VUC SPRING

3RR21422AA30
Siemens
1: HK$2,385.36
Non-Stocked Lead-Time 3 Weeks

Mfr. Part No.
3RR21422AA30

Mouser Part No
982-3RR21422AA30

Siemens

Industrial Relays CURRENT MONITR S0 4-40A 24VUC SPRING

Datasheet

Non-Stocked Lead-Time 3 Weeks

HK$2,385.36

HK$2,270.28

HK$2,238.96

Min.: 1
Mult.: 1

Industrial Relays CURRENT MONITR S0 4-40A 24-240VUC SPRING

3RR21422AW30
Siemens
1: HK$2,594.81
Non-Stocked Lead-Time 2 Weeks

Mfr. Part No.
3RR21422AW30

Mouser Part No
982-3RR21422AW30

Siemens

Industrial Relays CURRENT MONITR S0 4-40A 24-240VUC SPRING

Datasheet

Non-Stocked Lead-Time 2 Weeks

HK$2,594.81

HK$2,470.93

HK$2,437.48

Min.: 1
Mult.: 1

Industrial Relays CURRENT MONITOR S2 24VUC 8-80A SCREW

3RR21431AA30
Siemens
1: HK$3,274.93
Non-Stocked Lead-Time 2 Weeks

Mfr. Part No.
3RR21431AA30

Mouser Part No
982-3RR21431AA30

Siemens

Industrial Relays CURRENT MONITOR S2 24VUC 8-80A SCREW

Datasheet

Non-Stocked Lead-Time 2 Weeks

HK$3,274.93

HK$3,158.78

HK$3,116.20

Min.: 1
Mult.: 1

Industrial Relays CURRENT MONITOR S2 24-240VUC 8-80A SCREW

3RR21431AW30
Siemens
1: HK$3,598.55
Non-Stocked Lead-Time 2 Weeks

Mfr. Part No.
3RR21431AW30

Mouser Part No
982-3RR21431AW30

Siemens

Industrial Relays CURRENT MONITOR S2 24-240VUC 8-80A SCREW

Datasheet

Non-Stocked Lead-Time 2 Weeks

HK$3,598.55

HK$3,470.73

HK$3,423.79

Min.: 1
Mult.: 1

Industrial Relays CURRENT MONITOR S2 24VUC 8-80A SPRING

3RR21433AA30
Siemens
1: HK$3,274.93
Non-Stocked Lead-Time 2 Weeks

Mfr. Part No.
3RR21433AA30

Mouser Part No
982-3RR21433AA30

Siemens

Industrial Relays CURRENT MONITOR S2 24VUC 8-80A SPRING

Datasheet

Non-Stocked Lead-Time 2 Weeks

HK$3,274.93

HK$3,158.78

HK$3,116.20

Min.: 1
Mult.: 1

Industrial Relays CURRENT MONITOR S2 250VUC 8-80A SPRING

3RR21433AW30
Siemens
1: HK$3,598.55
Non-Stocked Lead-Time 2 Weeks

Mfr. Part No.
3RR21433AW30

Mouser Part No
982-3RR21433AW30

Siemens

Industrial Relays CURRENT MONITOR S2 250VUC 8-80A SPRING

Datasheet

Non-Stocked Lead-Time 2 Weeks

HK$3,598.55

HK$3,470.73

HK$3,423.79

Min.: 1
Mult.: 1

Industrial Relays CURRENT MONITR S00 1.6-16A 24VUC SCREW

3RR22411FA30
Siemens
1: HK$3,861.67
Non-Stocked Lead-Time 2 Weeks

Mfr. Part No.
3RR22411FA30

Mouser Part No
982-3RR22411FA30

Siemens

Industrial Relays CURRENT MONITR S00 1.6-16A 24VUC SCREW

Datasheet

Non-Stocked Lead-Time 2 Weeks

HK$3,861.67

HK$3,788.27

Min.: 1
Mult.: 1

Industrial Relays CURRENT MONITR S00 1.6-16A 24-240VUC SCW

3RR22411FW30
Siemens
1: HK$4,026.48
Non-Stocked Lead-Time 3 Weeks

Mfr. Part No.
3RR22411FW30

Mouser Part No
982-3RR22411FW30

Siemens

Industrial Relays CURRENT MONITR S00 1.6-16A 24-240VUC SCW

Datasheet

Non-Stocked Lead-Time 3 Weeks

HK$4,026.48

HK$3,949.87

Min.: 1
Mult.: 1

Industrial Relays CURRENT MONITR S00 1.6-16A 24VUC SPRING

3RR22412FA30
Siemens
1: HK$3,861.67
Non-Stocked Lead-Time 2 Weeks

Mfr. Part No.
3RR22412FA30

Mouser Part No
982-3RR22412FA30

Siemens

Industrial Relays CURRENT MONITR S00 1.6-16A 24VUC SPRING

Datasheet

Non-Stocked Lead-Time 2 Weeks

HK$3,861.67

HK$3,788.27

Min.: 1
Mult.: 1

Industrial Relays CURRENT MONITR S00 1.6-16A 24-240VUC SPG

3RR22412FW30
Siemens
1: HK$4,026.48
Non-Stocked Lead-Time 2 Weeks

Mfr. Part No.
3RR22412FW30

Mouser Part No
982-3RR22412FW30

Siemens

Industrial Relays CURRENT MONITR S00 1.6-16A 24-240VUC SPG

Datasheet

Non-Stocked Lead-Time 2 Weeks

HK$4,026.48

HK$3,949.87

Min.: 1
Mult.: 1

Industrial Relays CURRENT MONITR S0 4-40A 24VUC SCREW

3RR22421FA30
Siemens
1: HK$4,273.08
Non-Stocked Lead-Time 2 Weeks

Mfr. Part No.
3RR22421FA30

Mouser Part No
982-3RR22421FA30

Siemens

Industrial Relays CURRENT MONITR S0 4-40A 24VUC SCREW

Datasheet

Non-Stocked Lead-Time 2 Weeks

HK$4,273.08

HK$4,191.54

Min.: 1
Mult.: 1

Industrial Relays CURRENT MONITR S0 4-40A 24-240VUC SCREW

3RR22421FW30
Siemens
1: HK$4,529.22
Non-Stocked Lead-Time 2 Weeks

Mfr. Part No.
3RR22421FW30

Mouser Part No
982-3RR22421FW30

Siemens

Industrial Relays CURRENT MONITR S0 4-40A 24-240VUC SCREW

Datasheet

Non-Stocked Lead-Time 2 Weeks

HK$4,529.22

HK$4,442.66

Min.: 1
Mult.: 1

Industrial Relays CURRENT MONITR S0 4-40A 24VUC SPRING

3RR22422FA30
Siemens
1: HK$4,273.08
Non-Stocked Lead-Time 2 Weeks

Mfr. Part No.
3RR22422FA30

Mouser Part No
982-3RR22422FA30

Siemens

Industrial Relays CURRENT MONITR S0 4-40A 24VUC SPRING

Datasheet

Non-Stocked Lead-Time 2 Weeks

HK$4,273.08

HK$4,191.54

Min.: 1
Mult.: 1

Industrial Relays CURRENT MONITR S0 4-40A 24-240VUC SPRING

3RR22422FW30
Siemens
1: HK$4,529.22
Non-Stocked Lead-Time 2 Weeks

Mfr. Part No.
3RR22422FW30

Mouser Part No
982-3RR22422FW30

Siemens

Industrial Relays CURRENT MONITR S0 4-40A 24-240VUC SPRING

Datasheet

Non-Stocked Lead-Time 2 Weeks

HK$4,529.22

HK$4,442.66

Min.: 1
Mult.: 1

Industrial Relays CURRENT MONITOR S2 24VUC 8-80A SCREW

3RR22431FA30
Siemens
1: HK$5,499.59
Non-Stocked Lead-Time 2 Weeks

Mfr. Part No.
3RR22431FA30

Mouser Part No
982-3RR22431FA30

Siemens

Industrial Relays CURRENT MONITOR S2 24VUC 8-80A SCREW

Datasheet

Non-Stocked Lead-Time 2 Weeks

HK$5,499.59

HK$5,312.75

Min.: 1
Mult.: 1

Industrial Relays CURRENT MONITOR S2 24-240VUC 8-80A SCREW

3RR22431FW30
Siemens
1: HK$5,811.05
Non-Stocked Lead-Time 2 Weeks

Mfr. Part No.
3RR22431FW30

Mouser Part No
982-3RR22431FW30

Siemens

Industrial Relays CURRENT MONITOR S2 24-240VUC 8-80A SCREW

Datasheet

Non-Stocked Lead-Time 2 Weeks

HK$5,811.05

HK$5,613.44

Min.: 1
Mult.: 1

Industrial Relays CURR MON IO-LINK S2 24VDC 8-80A SCREW

3RR22433FA30
Siemens
1: HK$5,499.59
Non-Stocked Lead-Time 2 Weeks

Mfr. Part No.
3RR22433FA30

Mouser Part No
982-3RR22433FA30

Siemens

Industrial Relays CURR MON IO-LINK S2 24VDC 8-80A SCREW

Datasheet

Non-Stocked Lead-Time 2 Weeks

HK$5,499.59

HK$5,312.75

Min.: 1
Mult.: 1

Industrial Relays CURR MON IO-LINK S2 24VDC 8-80A SPRNG

3RR22433FW30
Siemens
1: HK$5,811.05
Non-Stocked Lead-Time 2 Weeks

Mfr. Part No.
3RR22433FW30

Mouser Part No
982-3RR22433FW30

Siemens

Industrial Relays CURR MON IO-LINK S2 24VDC 8-80A SPRNG

Datasheet

Non-Stocked Lead-Time 2 Weeks

HK$5,811.05

HK$5,613.44

Min.: 1
Mult.: 1