Product Description:

The PMB33C-20100-03 is a brushless servomotor manufactured by Pacific Scientific and belongs to the PMB Brushless Servomotors series. Acting as a torque source in multi-axis machines, the unit couples directly to gearheads or load shafts and delivers precise speed and position control when driven by a compatible amplifier. By eliminating brushes, it reduces maintenance and supports the high cycle rates required in packaging lines, electronic assembly, and material-handling stations. Its operating style also suits repeated start-and-stop motion where stable response and accurate positioning are important.

The motor uses flying leads with AMP connectors, and these pre-terminated conductors simplify field wiring while keeping contact resistance low. Its frame is classified as NEMA Size 34, so the face measures 3.38 inches square and fits standard 34-frame brackets. A nominal stall current of 3.8 ARMS at 240 VAC indicates the steady current the drive must supply at zero speed to hold maximum torque without excessive thermal rise. Rotor position is detected by a resolver, which provides feedback that remains reliable in electrically noisy environments and at elevated temperatures. The standard frame format also supports straightforward integration with common machine mounts and coupling hardware intended for this motor size.

The output shaft uses a square key, which helps maintain positive engagement with couplings and reduces the chance of slip under peak load. Electromagnetic length is extended by a stack length multiple of 3, allowing higher continuous torque while preserving the 34-frame footprint. The unit includes a shaft seal and a PTC thermistor; the seal helps restrict dust or coolant entry, and the sensor can signal rising winding temperature to the connected drive. As part of the PMB Brushless Servomotors series, the model follows the same general mounting geometry used across the product line. This consistency helps when a machine design is based on the PMB platform and needs predictable fit within the available mounting space.