PMB33E-00100-02 Pacific Scientific
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The Pacific Scientific PMB33E-00100-02 is a brushless servomotor from the PMB Brushless Servomotors series with a NEMA Size 34 motor and a flat shaft design. It uses flying leads with AMP connectors and includes a resolver sensor with a PTC thermistor for protection. The nominal stall current at 240 Vac max is 7.4 ARMS, and it features a stack length multiple of 3.
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Product Description:
The PMB33E-00100-02 is a brushless servomotor manufactured by Pacific Scientific. It is part of the PMB Brushless Servomotors series. It is intended for closed-loop positioning duties in automated pick-and-place heads, carton erectors, or light gantry axes where fast response and repeatable accuracy are required without the added compliance of belts or gearboxes. Its brushless construction supports smooth torque production and fast command response in compact motion systems that require accurate starts, stops, and short indexing moves.
The motor is built around a NEMA Size 34 frame, so its 3.4-inch square face and standardized pilot diameter suit common NEMA 34 mounting patterns. When the shaft is locked, the winding can draw up to 7.4 ARMS at 240 VAC, a value the servo amplifier must sustain to hold static loads without overheating. The current rating is especially important during holding or low-speed operation, when the amplifier must manage heating while maintaining commanded torque. Rotor position is returned through a brushless Resolver, providing angular feedback and strong immunity to electrical noise that can upset digital encoders. Because the feedback element is brushless, it avoids contact wear in long-duty automation service. Installation is simplified by Flying leads with AMP connectors; these pigtails let the cable pass through machine conduit before the electrical connection is made.
A Flat shaft end offers a drive surface that suits couplings secured by set screws without adding shaft diameter. The motor uses a stack length multiple of 3, giving the stator a medium magnetic volume for applications that need more continuous torque than a single-stack motor while still favoring a compact size. To monitor winding temperature, a built-in PTC Thermistor changes resistance sharply near the allowable heat rise, enabling the drive to reduce current before insulation damage occurs. This type of thermal protection is useful on axes that cycle frequently or remain stationary under load for extended periods.
