Three-phase motor selection
Choose load, kW, speed, voltage, frame, mounting and duty first; use efficiency only after compatibility is established.
Read the selection guide →Three-phase motor finder and selector.
Replacing a failed motor or selecting a new one — match Australian registered motors by rated power, poles, voltage, IEC frame and mounting, then compare GEMS efficiency and estimated running cost. Vendor neutral, compatibility first, and honest about what the data can't tell you.
- Enter what you know
- See motors registered for supply in Australia
- Read why each one qualified
- Compare up to four
- Verify what the register cannot confirm
Match results
Finding a replacement
Read the five figures off the nameplate — kW, poles, voltage, frame and mounting — and know which details still need separate confirmation.
Read the replacement guide →Efficiency & running cost
Why load point and operating hours matter, how BecSpec uses GEMS 50%, 75% and 100% efficiencies, and what the estimate excludes.
Read the evidence →IEC frame sizes & mounting
Understand 132S, 132M and related frame codes, plus B3, B5, B14 and B35 mounting arrangements.
Read the frame guide →How matching works
Every result is produced by fixed rules you can read. No score, no weighting, no commercial influence on ranking.
Read the rules →Where the data comes from
Published as open data, under a licence that permits commercial reuse.
See provenance →Known limitations
What the register leaves out, where one registration covers a whole product family, and which checks you still have to make yourself.
Understand the gaps →Browse by rating
Every power and pole combination on the register, with the frame sizes, brands and efficiency spread available at each.
See all ratings →
Common questions
Questions people bring to a motor replacement.
What is a 132M frame motor?
132M is an IEC frame designation. The number — 132 — is the shaft centre height in millimetres, measured from the base of the feet to the middle of the shaft. The letter M is the frame length: a 132M motor is longer than a 132S of the same centre height and shorter than a 132L. Because IEC frame sizes are standardised, a 132M motor from one manufacturer bolts up the same way as a 132M motor from another.
Browse 132M frame motors →What is a 132S frame motor?
132S shares the same 132 mm shaft centre height as the 132M and 132L frames, but is the shortest of the three — a shorter overall length and closer-set foot mounting holes. It's common on lower-power motors within the 132 frame range.
Browse 132S frame motors →How do I replace a 5.5 kW three-phase motor?
Start with rated power, pole count and voltage from the nameplate to narrow candidates with the same main electrical and speed characteristics. Then match the IEC frame designation and mounting code, commonly B3 for a foot-mounted motor, to narrow candidates with the same registered mechanical arrangement. Shaft dimensions, duty, starting requirements, terminal box position and other application-specific details still need to be checked separately; they're not all in the register BecSpec matches against.
Search 5.5 kW motors →What does B3 mounting mean?
B3 is the IEC code for a foot-mounted motor, bolted down through feet on its base — the most common arrangement. B5 and B14 are flange-mounted variants with no feet; B35 has both a flange and feet.
Browse B3 mounted motors →