S0 frame, 32 A — the derating curve sets the real limit
The 3RW4027-2BB15: The S0 frame size means the power stage and bypass are sized for this current band — the derating above 40 °C is the number that governs the motor FLA you can actually start in a warm panel. An integrated bypass contact system carries the motor current once the start ramp completes, taking the thyristors out of the circuit and eliminating continuous heat dissipation. This keeps the enclosure temperature rise lower than a non-bypassed starter running the same load. The adjustable current limitation lets you set the start current between 20 % and the rated value — useful for soft-starting conveyors or pumps where the load torque curve is known and you want to limit inrush on the supply side.
Mounting and wiring — screw or snap, spring terminals
Fastening is by screw or snap-on mounting onto a DIN rail. The 45 mm width and 150 mm height fit a standard S0 footprint — the 155 mm depth is the dimension to check against enclosure depth, especially if a fan or additional clearance is needed above the unit. Auxiliary and control circuits also use spring-loaded terminals, which speeds wiring in panel assembly — no screw torque control needed. Pollution degree 3 per IEC 60947-4-2 means the starter is rated for industrial environments where conductive pollution or dry non-conductive pollution that becomes conductive due to condensation may occur. This is the standard pollution severity for most control panels without sealed enclosures.
Control voltage and operating conditions
Control supply voltage is 110 … 230 V DC — a wide-range input that covers common DC bus voltages in industrial panels. Operating frequency is 50 … 60 Hz, so the same unit works on 50 Hz or 60 Hz mains without adjustment. The mounting position is flexible: with an additional fan, the unit can be rotated ±90° on a vertical surface and tilted ±22.5° front-to-back; without a fan, rotation is limited to ±10°. Motor overload protection and intrinsic device protection are built in — the starter monitors both the motor current and its own thyristor temperature, reducing the need for external overload relays in many applications.