140 mm flange, 4040 W — SH3 servo for high-torque three-phase lines
The SH31404P02A1200 is a 140 mm flange-size servo motor from Schneider Electric's SH3 series, delivering 4040 W continuous power on a three-phase supply. It is built for applications that need sustained torque at speed — think indexing tables, rotary knives, or winder drives where the load profile demands both peak and continuous output. Nominal torque lands at 30.2 N.m on 400 V three-phase, with a continuous stall torque of 33.4 N.m across the 115...480 V three-phase range. The peak stall torque hits 131.9 N.m — enough to break through a jam or accelerate a high-inertia load without tripping the drive on overcurrent.
Absolute multiturn Hiperface encoder and IP65/IP67 sealing
The absolute multiturn SinCos Hiperface encoder gives position feedback without a home cycle after power loss — the drive knows the shaft angle and the number of turns since commissioning. This matters on a gantry or rotary axis where a homing move would crash the tool into the part. IP65 on the motor body and shaft bushing, IP67 on the housing per IEC 60034-5. The shaft bushing seal is the wet-end barrier — if the machine sees washdown or coolant splash, this motor survives where an IP54 unit would wick moisture into the bearings. The straight connector exits the motor body without a right-angle joint, so the cable gland sees less bending stress in a fixed installation.
Smooth shaft, no brake — coupling and holding strategy
The shaft is smooth with a 24 mm diameter and 50 mm length. No keyway means the coupling must transmit torque through a friction fit or a clamping hub — a set-screw coupling on a smooth shaft will slip under the 131.9 N.m peak torque; use a clamping or shrink-disc coupling rated for the full peak torque plus a safety factor.
Current ratings and thermal limits for drive and cable sizing
Continuous stall current is 21.3 A; the maximum peak current (3 s) is 95.6 A. The drive's continuous output rating must be ≥ 21.3 A, and the peak current capability must handle 95.6 A for at least 3 seconds. Cable cross-section should be sized for 21.3 A continuous with a derating factor for the motor's 130 °C copper hot temperature and the cable routing in the cable track. Stator resistance is 0.28 Ohm and inductance is 2.035 mH — these set the I²R copper loss and the current ripple at the drive's PWM carrier frequency. The torque constant is 1.57 N.m/A at 120 °C, and the back EMF constant is 104 V/krpm at 20 °C. Enter these into the drive autotune routine, not the default motor parameters, or the current loop bandwidth will be wrong and the motor will run rough at low speed.