Siemens 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.
Features
- Continuous supervision of motor currents and load conditions
- Mounted directly onto RT2 contactors
- IP20 protection
- Detect various faults, including overcurrent, undercurrent, phase failure, cable breaks, current asymmetry, and blocked‑rotor conditions
View Results ( 31 ) Page
| Part Number | Datasheet | Description |
|---|---|---|
| 3RR21433AA30 |  |
Industrial Relays CURRENT MONITOR S2 24VUC 8-80A SPRING |
| 3RR24421AA40 | |
Industrial Relays CURR MON IO-LINK S0 4-40A 24VDC SCREW |
| 3RR21411AA30 | |
Industrial Relays CURRENT MONITR S00 1.6-16A 24VUC SCREW |
| 3RR21411AW30 | |
Industrial Relays CURRENT MONITR S00 1.6-16A 24-240VUC SCW |
| 3RR21412AA30 | |
Industrial Relays CURRENT MONITR S00 1.6-16A 24VUC SPRING |
| 3RR21412AW30 | |
Industrial Relays CURRENT MONITR S00 1.6-16A 24-240VUC SPG |
| 3RR21421AA30 | |
Industrial Relays CURRENT MONITR S0 4-40A 24VUC SCREW |
| 3RR21421AW30 | |
Industrial Relays CURRENT MONITR S0 4-40A 24-240VUC SCREW |
| 3RR21422AA30 | |
Industrial Relays CURRENT MONITR S0 4-40A 24VUC SPRING |
| 3RR21422AW30 | |
Industrial Relays CURRENT MONITR S0 4-40A 24-240VUC SPRING |
Published: 2026-02-17
| Updated: 2026-02-17