ABB RL1304A277 Fan and Blower - NEMA 56 Open Frame
Part Number: 7BRL1304A277
Quick Summary
ABB RL1304A277 Fan and Blower is a compact 0.5 HP, 277 V single-phase motor for HVAC and industrial air handling. Engineers often contend with mismatched frames and long lead times for open-enclosure units. With CSA/UR listings and a NEMA 56 frame, it meets design and safety standards while easing integration. Its resilient mounting and open enclosure simplify installation in tight spaces, reducing vibration and footprint. This 277 V unit is ready to ship from multiple warehouses, enabling faster procurement and minimizing downtime for maintenance or OEM retrofits. Designed for continuous duty in demanding environments and backed by industry-standard certifications.
Product Information
Extended Description
7BRL1304A277 ABB: Fan and Blower 0.5 Hp 277 V (RL1304A277)
Configuration Only
No
Country of Origin
United States (US)
Lead Time
0 day
Made To Order
No
Product Sales Status
Active
Quote Only
No
Stocked At Warehouses
EGAUT001EXPU
Warranty Return
Product under warranty must be returned
Configuration Only
No
Country of Origin
United States (US)
Lead Time
0 day
Made To Order
No
Product Sales Status
Active
Quote Only
No
Stocked At Warehouses
GBINS001EXPU
Warranty Return
Product under warranty must be returned
Country of Origin
United States (US)
Lead Time
0 day
Made To Order
No
Product Sales Status
Active
Quote Only
No
Stocked At Warehouses
SGIND004EXPU
Warranty Return
Product under warranty must be returned
Country of Origin
United States (US)
Lead Time
0 day
Made To Order
No
Product Sales Status
Active
Quote Only
No
Stocked At Warehouses
USABB014EXPU
Warranty Return
Product under warranty must be returned
ABB Type Designation
.5HP/1725RPM/1PH/OPEN/NEMA 56
Altitude
1000 m
Ambient Temperature
40 °C
Bearing
6203, Ball
Bearing NDE
6203
Brake Present
No
Brand / Label
Baldor-Reliance
Catalog Number
RL1304A277
Certification Agency
CSA | UR
Country of Origin
United States (US)
Customs Tariff Number
85013100
Design
N
Dimension Diagram
34LYL033: Dimension Sheet
Direction of Rotation
Both sides
Drive End Flange Type
Resilient Mount
ETIM 7
EC001851 - Electric motor
Efficiency Level
Not Regulated / Exempt
Electrical Data
Enclosure Type
OPEN
Frame Material
Steel
Frame Size
56
Frequency (f)
60 Hz
Global Commercial Alias
RL1304A277
Gross Volume
1400.25 inÂł
Gross Weight
26 lb
Horsepower Rating UL/CSA
0.500 Hp
IC Class
OPEN
IDEA Granular Category Code (IGCC)
1318 >> Heating and cooling system motor AC
IE Class Data (50 Hz)
IE Class NA
IE Class Data (60 Hz)
IE Class NA
IM Class
F1
Insulation Class
B
Invoice Description
.5HP/1725RPM/1PH/OPEN/NEMA 56
Lubrication
Regreasable
Made To Order
No
Medium Description
Fan and Blower, 0.5 HP, 1800 RPM, Frame Size 56, ResilientMount Mounting, 1 Phase, OPEN Enclosure, 277 V, 60 Hz (RL1304A277)
Minimum Order Quantity
1 piece
Motor Base Type
Resilient
Motor Frame Size
56
Mounting Orientation
Horizontal
Mounting Position
F1
NEMA Design Code
N
Number of Phases
1
Number of Poles
4P
Number of Poles (High)
4
Number of Speeds
Single Speed
Order Multiple
1 piece
Output Power
0.5 Hp
Power Factor
61 %
Product Name
Fan and Blower
Product Net Depth / Length
13.813 in
Product Net Height
9.375 in
Product Net Weight
26 lb
Product Net Width
10.813 in
Product Type
Undefined
Quote Only
No
Rated Current (In)
3.6 A
Rated Efficiency
62 %
Rated Speed
1725 r/min
Replaced Product ID (OLD)
7B34L33W310
Selling Unit of Measure
piece
Service Factor
1.25
Service Factor Percentage
1.25 %
Shaft Diameter
0.63 in
Short Description
0.5 HP, 1800 RPM, Frame Size 56, ResilientMount, 1 PH, OPEN, 277 V
Standards
NEMA
Starting of Motor
Direct On Line
Stocked At (Warehouses)
China | Alabama, United States | Alaska, United States
Synchronous Speed (vsyn)
1800 r/min
Temperature Class Default
--
Two Speed Motor
No
Type of Duty
Continuous
UNSPSC
26101105
Voltage Code
K
Voltage Rating
277 V
Frame size 56 with resilient mounting and an OPEN enclosure simplifies installation and reduces mounting hardware costs. The result is faster commissioning and less system vibration, especially in OEM blowers and air handlers. In practical terms, your maintenance team spends less time aligning belts and securing a rugged base, while operations benefit from consistent airflow across multiple units in an environment with temperature up to 40 °C. 0.5 HP at 1725 r/min delivers balanced performance for continuous-duty air movement. The 277 V, 60 Hz, 1-phase design reduces wiring complexity and supports direct-on-line starting, cutting control panel costs and enabling quick retrofits. Regreasable 6203 ball bearings extend service intervals and reduce total cost of ownership. Combined with a robust frame (56) and open design, this motor tolerates industrial dust and moderate ambient temperatures while maintaining efficiency around 62%. CSA/UR listings and NEMA design code 'N' provide regulatory confidence for machinery installers and safety auditors. The 4-pole, 1-phase configuration delivers dependable performance with a single-speed profile for predictable process control. It's a straightforward, compatible retrofit for Baldor-Reliance RL1304A277 in OEM assemblies. Stocked across multiple warehouses with 0-day lead times minimizes downtime during replacements or new builds. Direct-on-line starting simplifies drive design, while the resilient base and horizontal mounting orientation support simple installation in compact spaces.
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FAQs
Yes. The RL1304A277 uses a 56-frame size and an open enclosure with resilient mounting, matching the typical Baldor-Reliance RL-series footprint. It supports 1-phase, 277 V operation and direct-on-line starting, which simplifies retrofit projects and OEM integrations. Verify shaft diameter (0.63 in) and mounting orientation (F1) to ensure a precise mechanical fit in your assembly.
Key electrical and mechanical specs include 0.5 HP, 1725 r/min (approx. 1800 synchronous), 277 V, 60 Hz, 1 phase, and a nominal current of 3.6 A. Frame size 56 with 6203 ball bearings and insulation class B. The unit is regreasable, improving maintenance intervals, and delivers efficiency around 62% with a power factor near 61%, suitable for continuous-duty blower applications.
Yes, it is designed for continuous duty in blower and air-handling equipment. The single-speed, 4-pole design provides stable torque and predictable airflow, while the open enclosure supports adequate cooling in ventilated spaces. Direct-on-line starting reduces control hardware and enables fast startups. For best results, install with horizontal mounting (F1) and ensure ambient temperature remains within the rated 40 °C.
The RL1304A277 carries CSA and UR listings, reflecting safety and reliability for industrial environments. It aligns with NEMA design standards (Code N) and is built for use in the United States with a robust stock program that minimizes lead times. These attributes assist with audits, procurement approvals, and meeting safety requirements in plant installations.
Maintenance and ROI are driven by long bearing life and rapid replacements. The regreasable 6203 bearings reduce downtime, while 0-day lead times and broad warehouse stocking shorten repair windows. The combination of open enclosure and resilient mounting lowers installation costs, and the unit’s reliable performance supports steady production rates and a favorable total cost of ownership.