Product Description:

The 136G7336 soft starter is manufactured by Danfoss and belongs to the MCD Soft Starters series. Installed between the mains supply and the motor, it controls voltage ramp-up and ramp-down, reducing torque peaks and extending equipment life in conveyor, pump, and fan applications across general automation plants. It handles across-the-line starts that would otherwise produce high electrical stress on switchgear.

An integrated bypass arrangement is provided; the contactor is internal, so heat losses during run duty are minimized without external wiring. Control electronics accept a logic supply of 24 VAC/VDC, allowing direct interface with standard PLC I/O cards. The mechanical envelope corresponds to frame size 1, enabling installation inside compact MCC sections. For environmental protection, the housing is rated IP20, giving finger-safe access while remaining suitable for ventilated cabinets. Power stages accommodate mains supplies from 200-525 V AC, covering common 208 V, 400 V, and 480 V systems. Under nominal ambient conditions, the starter carries a continuous line current of 20 A, matching motors of roughly 7.5 kW at 400 V while providing programmed acceleration and deceleration profiles.

Within the MCD 600 platform, the device uses adaptive control algorithms that track load changes and adjust voltage ramps, helping reduce nuisance trips on lightly loaded motors. Connection terminals are arranged for three-phase power, and the SCR pairs are synchronized to deliver even phase symmetry during soft-start and soft-stop cycles. Built-in monitoring reports run time, start counts, and phase imbalance, so service intervals can be based on actual operating data rather than fixed schedules. Because current bypasses the thyristors once full speed is reached, heat dissipation is limited, which supports dense panel layouts.