Allen-Bradley 25B-A4P8N104 PowerFlex 525 0.75 kW AC Drive

A single-phase 240V PowerFlex 525 with three-phase output

The Allen-Bradley 25B-A4P8N104 runs a three-phase motor from a single-phase 200 to 240V supply. It is rated 0.75 kW (1 HP) with 4.8 A output, in frame A, and it keeps the embedded EtherNet/IP and Safe Torque Off of the 525 family. This is the drive used where only a single-phase supply is available, such as small remote sites or workshop machines.

The PowerFlex 525 adds an embedded EtherNet/IP port and Safe Torque Off, rated up to SIL 2 / PLd, to the 520-series family. Frame A measures 72 x 152 x 172 mm and weighs 1.1 kg (2.4 lb).

Technical specifications

Input current is the key difference

On a single-phase supply the drive draws 10.7 A for a 4.8 A output (2.8 kVA), roughly twice the current of the three-phase 25B-B5P0N104. The IEC protection table therefore lists larger fuses of 16 to 25 A, a 100-C12 or 100-E12 contactor and a 140M-C2E-C16 motor protector. Cable and breaker should be sized from the input current, not from the motor rating.

Catalog number decoding: 25B is the PowerFlex 525, A is the voltage code (240V AC single-phase), the rating digits give the output current, N is the IP20 NEMA/Open enclosure, 1 is the standard keypad module, 0 is no EMC filter and 4 is standard braking, meaning the brake IGBT is included.

The ordering code differs from the 25B-B5P0N104 only in the voltage letter and the current digits, so double-check the letter A (single-phase) before placing an order. Where only a single phase is available and a larger motor is needed, the 525 series range continues to 25B-A8P0N104 and 25B-A011N104 at 2 and 3 HP.

Practical notes

Output is still 0 to 230V, three-phase, so the motor must be a standard three-phase machine rated for the voltage. Total watts loss is 50 W, and the supply range is 170 to 264V.

If the supply is weak, check the datasheet limits and ride-through behaviour. A line reactor on the input may help reduce harmonics, and the technical data lists input reactor and filter options in its accessories chapter.

Related Allen-Bradley products: Allen-Bradley 25B-E1P7N104 PowerFlex 525 0.75 kW AC Drive, Allen-Bradley 25B-A2P5N104 PowerFlex 525 0.4 kW AC Drive, Allen-Bradley 25B-B024N104 PowerFlex 525 5.5 kW AC Drive, Allen-Bradley 25B-B8P0N104 PowerFlex 525 1.5 kW AC Drive, Allen-Bradley 25B-D013N104 PowerFlex 525 5.5 kW AC Drive and Allen-Bradley 25B-D024N104 PowerFlex 525 11 kW AC Drive.

Branch circuit protection for the 25B-A4P8N104

Rockwell Automation’s technical data (publication 520-TD001) lists this drive in the 200–240 V AC (−15%, +10%) single-phase input, 0–230 V three-phase output group. It is a frame A drive rated 1.0 HP / 0.75 kW in both normal and heavy duty, with a 4.8 A output current and an input voltage range of 170 to 264 V. Because the input is single-phase, the input current (10.7 A) is more than twice the output current, so the supply cable and protective device must be sized on the input side, not on the motor current.

The fuse and circuit breaker tables in the same publication give the following selections for the 25B-A4P8N104:

• IEC (non-UL) installations: fuse rating 16 A minimum, 25 A maximum; Bulletin 140M motor protection circuit breaker 140M-C2E-C16; Bulletin 140U molded case circuit breaker 140U-D6D2-C15.
• UL installations: Class CC, J or T fuses up to 25 A.
• Input contactor: 100-C12 (or 100-E12).

Always confirm the final selection against the current edition of the technical data and your local wiring regulations.

Replacement power module and options

The PowerFlex 520-series uses a detachable control module and power module. For this rating, the technical data lists the replacement power module 25-PM1-A4P8 (and 25-PM2-A4P8 for the version with an integral EMC filter). This drive has no internal EMC filter (the 0 in the catalog number); where EN 61800-3 compliance is required, Rockwell lists external filters for categories C1, C2 and C3. The PowerFlex 525 accepts two option cards, such as a dual-port EtherNet/IP card or other communication adapters, without increasing the footprint. Frame A drives can be DIN rail mounted, and zero stacking is allowed at ambient temperatures up to 45 °C (113 °F). For small single-phase machines such as fans, pumps and conveyors fed from a 230 V supply, this rating lets a standard three-phase motor be used without a three-phase supply.

Ordering and documents

Order 25B-A4P8N104 exactly as printed. The hosted document is the PowerFlex 520-series technical data 520-TD001I, and the photo is the official Rockwell family photograph of the frame A PowerFlex 525 drive (one image per frame, not per rating). Related drives are listed in the AC Drives category.

Seven Star LLC is an independent supplier in Muscat and quotes on request. Please confirm the catalog number, ratings and the current product status against the latest Rockwell Automation documents before ordering.