Ao Smith b607 Electric Motor 1/3 Hp 1725 Rpm 48Z Frame

Product Description

The AO SMITH b607 is a single-phase, drip-proof electric motor rated at 1/3 horsepower and 1725 RPM. Manufactured to Marathon catalog specifications under model 048S17D2117, it operates on 277 volts at 60 Hz and draws 2.5 amps at full load. Built on a 48Z frame, it carries a 1.35 service factor, allowing short-duration overloads without damage to the winding insulation. Class B insulation keeps the motor within safe operating limits across a wide ambient temperature range. Licensed technicians and mechanical contractors install this motor in continuous-duty applications where a compact, reliable single-phase drive is required.

The b607 fits residential and light commercial equipment that accepts a 48Z frame motor. Its 277-volt rating makes it well suited to commercial lighting and fan circuits fed directly from a single leg of a 480-volt panel, a common configuration in commercial HVAC air-handler, exhaust fan, and blower applications. The drip-proof enclosure provides protection against falling liquids and particles in typical indoor mechanical room environments. No overload protector is built in, so external thermal protection should be confirmed at installation.

Key Features

• 1/3 HP output with 1.35 service factor for intermittent overload tolerance
• 277-volt, 60 Hz, single-phase operation suits commercial panel configurations
• 48Z frame for direct OEM-style footprint compatibility
• Drip-proof enclosure rated IP22 for indoor mechanical environments
• Class B insulation rated for continuous duty up to 40 degrees C ambient
• UL Recognized construction for code-compliant installations

Compatibility

Designed as an OEM-style replacement for 48Z frame single-phase electric motors rated at 1/3 HP and 277 volts in continuous-duty fan and blower applications.

Installation Notes

Installation should be performed by a licensed electrician or qualified mechanical contractor in accordance with applicable NEC requirements. Disconnect and lock out all power before removing the existing motor or making wiring connections. Confirm that the supply voltage matches the motor nameplate rating of 277 volts before energizing. Because this motor includes no built-in overload protector, verify that external overcurrent protection is properly sized per NEC guidelines.

Technical Specifications

• Model Number: 048S17D2117
• Output Power: 1/3 HP (0.33 HP / 0.25 kW)
• Speed: 1725 RPM
• Voltage: 277 volts
• Current: 2.5 amps
• Phase: Single phase
• Frequency: 60 Hz
• Service Factor: 1.35
• Frame: 48Z
• Enclosure: Drip Proof
• Insulation Class: B
• Duty: Continuous
• Ambient Temperature: 40 degrees C
• IP Code: IP22
• Drive End Bearing: 6203
• Opposite Drive End Bearing: 6203
• Overload Protector: None
• Certifications: UL Recognized

Standard Information

• Brand: AO SMITH
• Manufacturer Part Number: b607