Product Description:

The SRF3643-4533-7-5-56C is a permanent-magnet direct-current motor produced by Pacific Scientific and supplied within the Permanent Magnet DC Motors series. The unit converts electrical energy from regulated DC supplies into rotational motion for conveyors, positioning jigs, and other low-voltage automation axes that call for compact torque sources. By combining a magnetized rotor with a wound stator, the motor eliminates field excitation losses and offers a stable speed-torque profile that simplifies closed-loop drive control in material-handling or indexing equipment.

The motor is designed for power modules that deliver phase-controlled voltage, and its drive rating is SCR rated, indicating compatibility with silicon-controlled rectifier converters that modulate armature voltage through line commutation. A continuous-duty rating means heating under rated load remains within insulation limits during unrestricted operation time. The enclosure style is TEFC, so a shaft-mounted fan forces ambient air across exterior fins while internal parts stay sealed against airborne dust and moisture. Dimensional interchange follows the NEMA code 56C, giving a 5.62-inch diameter frame that aligns with standardized face couplings and shaft heights on small gear reducers or pumps. Under rated armature voltage, the shaft reaches 1750 rpm, a speed that balances mechanical efficiency with commutator life in general-purpose drives.

Installation flexibility is improved by a removable base, so the foot casting can be detached and the housing can mount directly to machine plates when vertical orientation is required. Core construction follows PMDC technology, which means permanent magnets provide the main field rather than wound shunts and reduce weight and response lag during speed changes. The face carries a NEMA C-face pilot register, enabling quick, concentric attachment to reducers without shaft-coupling misalignment during installation.