Motor Starters

A motor starter is a device for motor control applications and is used to start and stop a motor. A starter is an electromechanical switch similar to a relay, the main difference being that a starter contains a contactor and overload protection to prevent electrical overloading of the motor.

Types of Motor Starter

  • DOL Starters - Direct On Line (DOL) or across the line starters are the most common general purpose starter. A magnetic contactor connects the full voltage of the power supply directly to the motor with an overload relay for protection against short circuit, energizing the coil pulls the contactors together to close the circuit and start the device. They are used for motors that are only required to run in one direction at a single speed.
  • Reversing DOL Starters - these motor starters can run a motor either forwards or backwards. These three-button starters are particularly useful for conveyor based machinery, where reversing the direction is sometimes necessary.
  • Star Delta Starter - a reduced voltage motor starter designed to control a three-phase induction motor, the windings in this starter are switched between star and delta connections to start the motor. A star delta circuit will have a contactor configuration within the relay of. triple pole (star) and double throw (delta).
  • Soft Starter - typically used to control AC electric motors a soft starter works by helping reduce the torque and load in the power up and electrical current surges that are typical with motors during their start-up phase. It uses solid-state switches to control the voltage as well as the starting current supplied.

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Description Price Power Rating Motor Starter Type Range Voltage Rating IP Rating Current Rating Phase Number of Poles Motor Starter Functionality Reversibility Additional Features Overall Length Enclosure Overall Width
RS Stock No. 420-479
Mfr. Part No.3RW4047-1BB14
BrandSiemens
£790.82
Each
Units
55 kW Soft Start - 480 V ac IP00 106 A 3 - - - - 188mm - 70mm
RS Stock No. 420-514
Mfr. Part No.3RW4037-1BB14
BrandSiemens
£555.95
Each
Units
30 kW Soft Start - 480 V ac IP00 63 A 3 - - - - 170mm - 55mm
RS Stock No. 420-495
Mfr. Part No.3RW4028-1BB14
BrandSiemens
£393.35
Each
Units
18.5 kW Soft Start - 480 V ac IP20 38 A 3 - - - - 125mm - 45mm
RS Stock No. 746-4965
Mfr. Part No.3RW4055-6BB44
BrandSiemens
£895.11
Each
Units
75 kW Soft Start - 400 V IP00 134 A 3 - - - - 250mm - 120mm
RS Stock No. 420-524
Mfr. Part No.3RW4038-1BB14
BrandSiemens
£645.46
Each
Units
37 kW Soft Start - 480 V ac IP00 72 A 3 - - - - 170mm - 55mm
RS Stock No. 420-518
Mfr. Part No.3RW4036-1BB14
BrandSiemens
£468.08
Each
Units
22 kW Soft Start - 480 V ac IP00 45 A 3 - - - - 170mm - 55mm
RS Stock No. 746-4943
Mfr. Part No.3RW4027-1BB04
BrandSiemens
£328.48
Each
Units
15 kW Soft Start - 400 V IP20 32 A 3 - - - - 154mm - 45mm
RS Stock No. 420-502
Mfr. Part No.3RW4026-1BB14
BrandSiemens
£275.92
Each
Units
11 kW Soft Start - 480 V ac IP20 25 A 3 - - - - 154mm - 45mm
RS Stock No. 420-520
Mfr. Part No.3RW4046-1BB14
BrandSiemens
£725.12
Each
Units
45 kW Soft Start - 480 V ac IP00 80 A 3 - - - - 188mm - 70mm
RS Stock No. 420-508
Mfr. Part No.3RW4027-1BB14
BrandSiemens
£328.48
Each
Units
15 kW Soft Start - 480 V ac IP20 32 A 3 - - - - 154mm - 45mm
RS Stock No. 746-4971
Mfr. Part No.3RW4073-6BB44
BrandSiemens
£946.35
Each
Units
132 kW Soft Start - 400 V IP00 230 A 3 - - - - 278mm - 160mm
RS Stock No. 746-4940
Mfr. Part No.3RW4026-1BB04
BrandSiemens
£294.47
Each
Units
11 kW Soft Start - 400 V IP20 25 A 3 - - - - 154mm - 45mm
RS Stock No. 420-491
Mfr. Part No.3RW4024-1BB14
BrandSiemens
£234.86
Each
Units
5.5 kW Soft Start - 480 V ac IP20 12.5 A 3 - - - - 154mm - 45mm
RS Stock No. 746-4975
Mfr. Part No.3RW4074-6BB44
BrandSiemens
£1,489.87
Each
Units
160 kW Soft Start - 400 V IP00 280 A 3 - - - - 278mm - 160mm
RS Stock No. 746-4959
Mfr. Part No.3RW4037-1BB04
BrandSiemens
£555.95
Each
Units
30 kW Soft Start - 400 V IP00 63 A 3 - - - - 170mm - 55mm
RS Stock No. 746-4919
Mfr. Part No.3RW3026-1BB04
BrandSiemens
£211.05
Each
Units
11 kW Soft Start - 400 V IP20 25 A 3 - - - - 151mm - 45mm
RS Stock No. 746-4956
Mfr. Part No.3RW4036-1BB04
BrandSiemens
£468.08
Each
Units
22 kW Soft Start - 400 V IP00 45 A 3 - - - - 170mm - 55mm
RS Stock No. 746-4987
Mfr. Part No.3RW4076-6BB44
BrandSiemens
£2,322.43
Each
Units
250 kW Soft Start - 400 V IP00 432 A 3 - - - - 278mm - 160mm
RS Stock No. 746-4912
Mfr. Part No.3RW3018-1BB04
BrandSiemens
£180.66
Each
Units
7.5 kW Soft Start - 400 V IP20 17.6 A 3 - - - - 151mm - 45mm
RS Stock No. 665-6261
Mfr. Part No.3RK4353-3LR58-0BA0
BrandSiemens
£291.84
Each
Units
2.2 kW DOL - 400 V ac IP54 - 3 3P Manual - Circuit Breaker Included 220mm Yes 182mm