315kW 1500rpm 4 Pole 380-415V/660-690V 50Hz IE4 UM4C Universal Motors
The Universal Motors UM4C 355L-4 is a 315kW 4-pole three-phase induction motor in a cast iron frame. It is rated IE4 Super Premium Efficiency and runs at 1490rpm on a 50Hz supply. The winding is dual voltage, 380-415V delta or 660-690V star, so it suits direct-on-line or star-delta starting.
Technical specifications
| Part number | UM4C 355L-4 |
|---|---|
| Series | Universal Motors UM4C, cast iron, IE4 Super Premium Efficiency |
| Rated output | 315 kW (430 hp) |
| Poles / synchronous speed | 4 pole / 1500 rpm |
| Rated speed | 1490 rpm |
| Supply | 380-415V / 660-690V, 3-phase, 50Hz |
| Efficiency at full load | 96.7% |
| Rated current at 400V | 522.50 A |
| Power factor (cos φ) | 0.90 |
| Rated torque | 2018.8 Nm |
| Starting current (Ia/In) | 8.5 |
| Frame size | IEC 355L |
| Mountings | B3 foot, B5 flange, B35 foot and flange |
| Enclosure | TEFV, IP55 |
| Insulation class | F |
| Duty | S1 continuous |
| Bearings | DE NU 322 / NDE 6322 C3 |
| Noise | 92 dB(A) |
| Weight (B3) | 1816 kg |
Why choose IE4
IE4 sits one efficiency class above IE3. Lower losses mean lower running costs and less heat, which matters most on large motors that run for long hours. At 96.7% full-load efficiency, the UM4C 355L-4 is rated IE4 on the manufacturer's datasheet.
Typical applications
- Pumps and fans
- Compressors
- Conveyors and material handling
- Crushers, mixers and process machinery
Download the datasheet for each mounting from this page. For help with sizing, starting method or a matched drive, contact our engineers.
| Power | 315.0 kW |
|---|---|
| Power (HP) | 430.0 HP |
| Poles | 4 |
| Full-load speed | 1490 rpm |
| Frequency | 50 Hz |
| Voltage | 380-415V/660-690V |
| Phase | Three-Phase |
| Nominal current | 522.5 A |
| Power factor (cos φ) | 0.9 |
| Efficiency class | IE4 |
| Efficiency | 96.7% |
| Rated torque | 2018.8 Nm |
| Starting current (Ia/In) | 8.5 |
| Duty rating | S1 |
| Protection rating | IP55 |
| Insulation class | F |
| Frame size | 355L |
| Frame material | Cast Iron |
| Mounting | B3 Foot |
| Bearings (DE / NDE) | DE NU 322 / NDE 6322 C3 |
| Noise level | 92 dB(A) |
| Weight | 1816.0 kg |
| Series | UM4C |
| Brand | Universal Motors |
| Motor type code | UM4C 355L-4-4 |
| Base part number | UM4C 355L-4 |
| Full part number | UM4C 355L-4 B3 |
| Warranty | 12 months manufacturer |
| SKU | UM4C 355L-4 B3 |
| Power | 315.0 kW |
|---|---|
| Power (HP) | 430.0 HP |
| Poles | 4 |
| Full-load speed | 1490 rpm |
| Frequency | 50 Hz |
| Voltage | 380-415V/660-690V |
| Phase | Three-Phase |
| Nominal current | 522.5 A |
| Power factor (cos φ) | 0.9 |
| Efficiency class | IE4 |
| Efficiency | 96.7% |
| Rated torque | 2018.8 Nm |
| Starting current (Ia/In) | 8.5 |
| Duty rating | S1 |
| Protection rating | IP55 |
| Insulation class | F |
| Frame size | 355L |
| Frame material | Cast Iron |
| Mounting | B5 Flange |
| Bearings (DE / NDE) | DE NU 322 / NDE 6322 C3 |
| Noise level | 92 dB(A) |
| Weight | 1816.0 kg |
| Series | UM4C |
| Brand | Universal Motors |
| Motor type code | UM4C 355L-4-4 |
| Base part number | UM4C 355L-4 |
| Full part number | UM4C 355L-4 B5 |
| Warranty | 12 months manufacturer |
| SKU | UM4C 355L-4 B5 |
| Power | 315.0 kW |
|---|---|
| Power (HP) | 430.0 HP |
| Poles | 4 |
| Full-load speed | 1490 rpm |
| Frequency | 50 Hz |
| Voltage | 380-415V/660-690V |
| Phase | Three-Phase |
| Nominal current | 522.5 A |
| Power factor (cos φ) | 0.9 |
| Efficiency class | IE4 |
| Efficiency | 96.7% |
| Rated torque | 2018.8 Nm |
| Starting current (Ia/In) | 8.5 |
| Duty rating | S1 |
| Protection rating | IP55 |
| Insulation class | F |
| Frame size | 355L |
| Frame material | Cast Iron |
| Mounting | B35 Foot and Flange |
| Bearings (DE / NDE) | DE NU 322 / NDE 6322 C3 |
| Noise level | 92 dB(A) |
| Weight | 1816.0 kg |
| Series | UM4C |
| Brand | Universal Motors |
| Motor type code | UM4C 355L-4-4 |
| Base part number | UM4C 355L-4 |
| Full part number | UM4C 355L-4 B35 |
| Warranty | 12 months manufacturer |
| SKU | UM4C 355L-4 B35 |
UK delivery
Next working day to most of the UK, on a fully tracked courier - you'll have the tracking link the moment it leaves our racking.
★ 2pm Promise: place your order before 2pm and it is despatched the same working day. Guaranteed, not just aimed for.
Shipping worldwide
We ship to 70+ countries with rates calculated live at checkout, so the price you see is the price you pay - no surprise invoice a week later. Moving several units, or need pallet freight? Get a freight quote on WhatsApp.
Returns
Specified the wrong one? Send it back within 14 days, unused and in its original packaging, and we'll refund it. Built-to-order and modified items are the one exception. Read the full returns policy →
Availability
5 × B3 Foot mounting on the shelf in our UK warehouse, boxed and ready to go out today.
5 × B5 Flange mounting on the shelf in our UK warehouse, boxed and ready to go out today.
5 × B35 Foot and Flange mounting on the shelf in our UK warehouse, boxed and ready to go out today.
Which mounting do I need?
The mounting type describes how the motor is fixed in place and how the shaft connects to your equipment. Choosing the right one ensures a direct, drop-in fit.
- B3 (Foot) - bolts down through feet on the base. The most common general-purpose mounting.
- B5 (Flange) - a large machined flange with clearance holes bolts directly to your gearbox or machine face.
- B14 (Face) - a smaller spigot/face flange with tapped holes, for lighter direct-coupled loads.
- B35 / B34 - combination mountings that provide both feet and a flange for extra support.
Still not sure? Message an engineer with your machine or existing motor's frame and we'll confirm the exact mounting for you.
Send us a message
Ask our UK engineers about this motor - sizing, stock, or a custom quote. Required fields are marked with *.