The Moeller DS4 is a compact soft start unit, with options for bypassed and reversing units available. Largest stocks of Moeller motor controllers held out side Moeller Germany.
The DS4 has been replaced by the new DS7 soft start. Some units are available from our stock, contact us for availability.
Specification and prices below:
| Control System | Line to Line Sine Wave PWM |
| Bypass | Integral bypass contactor in soft start models |
| Interface | Potentiometers x3 LEDs x2 |
| Starting Torque | 0-64% of nominal torque applicable to soft start units |
| Starting Current | Up to 300% of unit rating |
| Stopping | Ramp or Coast |
| DC Injection Braking | By external unit. Please see our INJ range. |
| Accel/Decel | 0.5-10secs |
| Frequency Range | 45-65Hz |
| Temperature Range | 0-40oC |
| Input Terminals | A1 & A2 wide voltage range 24-240V |
| Output Terminals | 1 relay, ready for swmi contactor, top of ramp for soft start |
| Overload Protection | By external unit, use Moeller PKZ, NZM |
| International Standards | UL, CE - Complies with EMC and LV Directives |
| Rated Current |
Rated Power |
Model | Unit Price | Model w/ Reverse |
Unit Price |
| Standard - 20 starts/hr @ 6*LN for 5s | |||||
| 6A | 2.2kW | DS4-340-2K2-M | Contact
us for pricing and availability |
DS4-340-2K2-MR | Contact
us for pricing and availability |
| 9A | 4.0kW | DS4-340-4K0-M | DS4-340-4K0-MR | ||
| 12A | 5.5kW | DS4-340-5K5-M | DS4-340-5K5-MR | ||
| 16A | 7.5kW | DS4-340-7K5-M | DS4-340-7K5-MR | ||
| 23A | 11kW | DS4-340-11K-M | DS4-340-11K-MR | ||
| Bypassed - 10 starts/hr @ 3*LN for 5s | |||||
| 16A | 7.5kW | DS4-340-7K5-MX | Contact
us for pricing and availability |
DS4-340-7K5-MXR | Contact
us for pricing and availability |
| 23A | 11kW | DS4-340-11K-MX | DS4-340-11K-MXR | ||
| 31A | 15kW | DS4-340-15K-MX | DS4-340-15K-MXR | ||
Moeller also made a single phase version of the DS4, however this is not a soft starter; it is a semiconductor contactor. They can be used as alternatives to contactors in applications that require a lot of switching and rapidly wear out the mechanical parts in contactors, such as fairground lights.
| Model Number | Type | Rate Current | Unit Price |
| DS4-140-010-H | Semiconductor contactor. Single Phase | 10A | Contact
us for pricing and availability |
| DS4-140-020-H | Semiconductor contactor. Single Phase | 20A | |
| DS4-140-030-H | Semiconductor contactor. Single Phase | 30A | |
| DS4-140-040-H | Semiconductor contactor. Single Phase | 40A |