Product Description:

The STF3624-4976-61-56BC is a permanent-magnet DC motor manufactured by Pacific Scientific within the Permanent Magnet DC Motors series. In automated machinery, this unit supplies direct rotational energy to gear reducers, lead-screw actuators, and compact pump stages that rely on steady armature voltage for speed control. As a brush-commutated design, it can be powered by SCR or PWM drives, making it a practical choice for packaging, conveying, and light material-handling equipment that operates in continuous-duty service. Its permanent-magnet field also eliminates the need for separate field excitation, which helps simplify installation and supports predictable speed response across common operating ranges.

Under continuous load, the armature draws 2.9 A, which marks the thermal limit for uninterrupted operation. At the same operating point, it delivers 9.0 lb-in of torque, keeping small mechanical transmissions moving without excessive heat buildup. The winding is optimized for a nominal bus of 90 V DC, and maintaining that level helps preserve the intended magnetic balance and stable commutation. Nameplate speed reaches 1750 RPM, allowing a common 30:1 regulated speed range when paired with modern controllers. Copper losses correspond to a resistance of 2.51 Ω, so current feedback can be used to estimate internal temperature rise during sustained operation.

Transient demands are handled by a peak armature draw of 54.0 A, letting the motor accelerate loads rapidly during short overload events. Each ampere produces 3.89 lb-in/A of torque, giving drive control loops a linear gain factor for accurate response. The armature inductance of 9.61 mH moderates current ripple, which helps the drivetrain run more smoothly when supplied by chopped DC. The motor has a rated output of one-quarter horsepower, mounts on a NEMA 56C face, and uses a Totally Enclosed Non-Ventilated housing to exclude airborne debris. An ingress rating of IP65 further protects internal components from dust and low-pressure water jets, which supports reliable use in washdown or particulate-laden areas.