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Small cylindrical steel HVAC motor with stud mounting and closed base

FASCO

FASCO D1139 HVAC Motor 1/50 HP 1550 rpm 115V 3.3 Frame

SKU CH-8ZY8-3VDJB

Replacement shaded-pole HVAC motor delivers 1/50 hp at 1550 rpm on 115 V AC in a 3.3 frame

  • Product typeClosed Base
  • Delivers 10 W output for reliable HVAC airflow
  • Three-speed shaded-pole design matches varied ventilation needs
  • 1550 rpm at 115 V ensures consistent single-phase performance
  • Totally enclosed air-over frame protects motor in 40 °C ambient conditions
  • Auto thermal protection and Class B insulation extend service life

FASCO D1139 Replacement Motor

The FASCO D1139 is a shaded-pole HVAC motor rated at 1/50 hp with a nameplate speed of 1550 rpm. It operates on 115 V AC at 60 Hz and draws 0.9 A at full load. The unit uses a 3.3 frame with a closed-base steel construction and stud mounting for direct OEM replacement.

Suitable for Shaded-Pole Applications

This motor suits technicians replacing an original shaded-pole unit that runs at a fixed 1550 rpm with three-speed taps. It is not usable at 200 V or 208 V, so installers working on multi-voltage equipment must select a different motor. The clockwise shaft rotation when viewed from the shaft end also means it will not fit applications requiring counter-clockwise rotation.

Sustained Operation Within Thermal Limits

The totally enclosed air-over enclosure and Class B insulation are designed for continuous duty at a maximum ambient temperature of 40 °C. Automatic thermal protection interrupts power if internal temperatures exceed safe limits, allowing the motor to reset once it cools. With a service factor of 1.0 and 10 W output, the motor delivers consistent airflow without overload margin beyond its nameplate rating.

How it compares

Measured against everything we stock in Fan Motors, Parts & Clip-On Fans, at today’s prices. Recalculated every night.

Price $95.99
Pricier than about 66% of the 473 comparable items (median $38.99).

Specifications

Product
Brand nameFASCO
Product typeClosed Base

Questions about this item

What voltage supply does the FASCO D1139 motor require to operate?

This motor runs on 115V AC single-phase power at 60 Hz; it is not usable at 200V or 208V.

Will the 3.3 frame and stud mounting match the openings on my existing fan housing?

The motor uses a 3.3 frame size with stud mounting; verify that your housing accepts that frame and stud pattern before installation.

How can I confirm the motor is running correctly after wiring it?

Check that the shaft turns clockwise from the shaft end, the three-speed function works, and the auto thermal protection does not trip under normal load.

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