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Small cylindrical HVAC motor, silver metal body with mounting studs visible

Dayton

Dayton 71633716M 1/40 HP 1550 rpm 115V 3.3 Frame HVAC Motor

SKU CH-RN9P-4Y64V

A 1/40 HP shaded-pole motor runs at 1550 rpm on 115 V AC for HVAC fan duty

  • Product typeClosed Base
  • 1/40 HP motor delivers 19 W output for light HVAC duties
  • 1550 rpm nameplate speed suits single-speed fan applications
  • 115 V AC supply with 1.1 A full-load current fits standard circuits
  • 3 frame size and stud mounting simplify direct replacement
  • Totally enclosed air-over design with auto thermal protection ensures continuous operation

Direct Replacement Motor

The Dayton 71633716M is a shaded-pole HVAC motor rated at 1/40 hp and 1550 rpm for 115V AC single-phase power. It fits a 3.3 frame with a totally enclosed air-over enclosure and stud mounting. Continuous duty cycle and Class B insulation suit standard residential or light commercial air-moving equipment.

Upgrade From Lower Output Models

This unit delivers 19 watts output at 1.1 amps full-load current, replacing motors with lower wattage or open enclosures. The jump is worth it when the application demands auto thermal protection and a closed-base design that resists dust and moisture. It is not usable at 200V or 208V, so voltage must match exactly.

60 Hz Fixed-Speed Limitation

The motor runs at a single speed of 1550 rpm nameplate on 60 Hz supply with no variable-speed capability. Shaded-pole design limits starting torque and efficiency compared to permanent-split-capacitor types. Buyers needing speed control, reversible rotation, or higher efficiency should specify a different motor technology.

How it compares

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

Price $59.99
Pricier than about 56% of the 473 comparable items (median $38.99).

Specifications

Product
Brand nameDAYTON
Product typeClosed Base

Questions about this item

What stud pattern does the 3.3 frame motor use for mounting?

The motor uses a stud mounting type on its 3.3 frame; match the stud spacing to your fan housing before installation.

Which wiring step is critical when connecting the 115V shaded-pole motor?

Verify rotation is CWSE from the shaft end and connect the single-phase leads to 115V AC only; the motor is not usable at 200V or 208V.

How often should the auto thermal protection be checked on this continuous-duty motor?

The auto thermal protection resets itself; inspect the totally enclosed air-over enclosure annually for lint buildup that could restrict cooling airflow.

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