Siemens SIRIUS 3RW4422-3BC34 Soft Starter (Phased Out)
Siemens SIRIUS 3RW4422-3BC34 Soft Starter (Phased Out).
The Siemens 3RW4422-3BC34 is a SIRIUS soft starter with standard ratings of 26A at 460V (15 hp) and inside-delta ratings of 45A (30 hp). It operates on 200-460V AC and features 115V AC spring-type terminals. Please note, this is a phased-out product with a preferred successor, the SIRIUS 3RW5516-3HA14.
This soft starter was used to provide smooth, controlled starting for three-phase induction motors, reducing mechanical stress and electrical inrush current. Its applications were common in pump control, fan systems, conveyor belts, and other machinery where soft starting is beneficial.
Stanlo Automation, a veteran-owned distributor of industrial automation surplus, has this Siemens 3RW4422-3BC34 available. While phased out, it can be a critical part for maintaining existing systems. Consider its successor, the 3RW5516-3HA14, for new installations.
| Type | Soft Starter |
| Series | SIRIUS |
| Rated Current (Standard) | 26 A @ 460V |
| Rated Current (Inside-delta) | 45 A |
| Rated Power (Standard) | 15 hp @ 460V |
| Rated Power (Inside-delta) | 30 hp |
| Voltage | 200-460V AC |
| Control Voltage | 115V AC |
| Terminals | Spring-type |