Bonfiglioli Bonfiglioli BN / BE / BX
Bonfiglioli BN (IE1), BE (IE2) and BX (IE3) three-phase asynchronous electric motors, with IEC sizes from 56 to 200 (BN).
BN, BE and BX are Bonfiglioli's series of three-phase squirrel-cage asynchronous motors for industrial environments: BN is efficiency class IE1, BE is IE2, BX is IE3, and BY (IE4) appears in the same catalogue for the large sizes. The BN, BE and BX series also have a compact version (M, ME, MX). The catalogue gives IEC sizes from 56A to 200LA for BN, from 63 to 180L for BE and from 63 to 355MCK for BX. The standard version is 230/400 V Δ/Y, 50 Hz, with a ±10 % tolerance, and for BN 160…200 the standard voltage is 400/690 V Δ/Y.
The code on the nameplate is read in the order given in the catalogue: motor type (BN, BE, BX, BY or M, ME, MX), size, number of poles, voltage and frequency, protection rating, insulation class, mounting form, then, for brake motors, the brake type (FD), braking torque, release lever orientation and brake supply. For a quotation, please send us a photo of the nameplate or the full code, including the number of poles and the mounting form; we check the code structure in the catalogue and the efficiency class before issuing the quotation.
Models and codes
| Code | Note |
|---|---|
| BN 63A 4 | IE1 motor with 4 poles; the power in the catalogue correlation table is 0.12 kW. |
| BN 71B 4 | IE1 motor with 4 poles; 0.37 kW in the correlation table. |
| BN 80B 4 | IE1 motor with 4 poles; 0.75 kW in the correlation table. |
| BN 90LA 4 | IE1 motor with 4 poles; 1.5 kW in the correlation table. |
| BN 100LB 4 | IE1 motor with 4 poles; 3 kW in the correlation table. |
| BN 132S 4 | IE1 motor with 4 poles; 5.5 kW in the correlation table. |
| BN 180L 4 | IE1 motor with 4 poles; 22 kW in the correlation table; the equivalents of the same size are BE 180L 4 (IE2) and BX 180L 4 (IE3). |
| BN 200L 4 | IE1 motor with 4 poles; 30 kW in the correlation table; standard voltage 400/690 V Δ/Y. |
Key specifications
| Efficiency classes (BNEXY catalogue) | BN = IE1, BE = IE2, BX = IE3, BY = IE4 |
|---|---|
| Compact versions | M (IE1), ME (IE2), MX (IE3) |
| BN IEC sizes | 56A … 200LA (compact M: 0B … 5SB) |
| BE / BX IEC sizes | BE 63 … 180L; BX 63 … 355MCK |
| Standard voltage, 50 Hz | 230/400 V Δ/Y, ±10 % (400/690 V Δ/Y for BN 160…200 and BE/BX 160, 180) |
| Protection rating | IP55 standard, IP56 optional (IP54 / IP55 on brake motors) |
| Insulation class | F standard, H optional |
| Mounting forms (IEC motor) | B3, B5, B14, B5R, B14R, B34, B35 |
The Bonfiglioli "BN-BE-BX-BY Series" catalogue, revision R07_0, covers the BN, BE, BX and BY series; the manufacturer's page keeps a separate catalogue and manual labelled "discontinued variants" (BNEX R06_1, IOM R03_0), so the exact code on the nameplate is checked in the appropriate documentation.
Frequently asked questions
How do I tell a BN motor from a BE or BX?
The letter in the code shows the efficiency class: BN is IE1, BE is IE2, BX is IE3. The same size exists in several classes (for example BN 180L 4, BE 180L 4 and BX 180L 4, all 22 kW at 4 poles), but the class cannot be deduced from the size; it is read from the nameplate.
What does "BN 71B 4" on the nameplate mean?
BN is the type (IE1 three-phase IEC motor), 71B is the size (frame 71, length B), and 4 is the number of poles. The voltage and frequency, protection rating, insulation class and mounting form follow, for example IP55, class F, B5. In the catalogue correlation table, BN 71B 4 appears at 0.37 kW.
What data should I send for a brake motor?
In addition to the motor code, the brake data from the code: type (FD), braking torque, release lever orientation, supply (AC or DC) and rectifier type. A photo of the nameplate with all the lines helps us check the structure in the catalogue.
Other Bonfiglioli series
The rated power for each size–pole combination, the currents and the speeds are read from the nameplate and from the catalogue data tables; only the values from the correlation table are listed here. Withdrawn variants are identified by the nameplate, in the corresponding documentation.
Updated: 2026-11-12