Lafert IE4 Motors – AMQE Series
Lafert AMQE super premium efficiency IE4 three-phase motors, 0.75 – 200 kW, aluminium frame 80 – 160 and cast iron frame 180 – 315. For continuous-duty pumps, fans and compressors where every efficiency point pays back. Supplied by KJ Export across the Gulf.
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IE4 vs IE3: what you gain
Nominal efficiency at 400 V 50 Hz, 4 pole, Lafert catalogue values.
| Rating | IE3 – AMPE | IE4 – AMQE | Losses saved |
|---|---|---|---|
| 2.2 kW (frame 100) | 86.7% | 89.5% | ≈ 21% |
| 7.5 kW (frame 132) | 90.4% | 92.6% | ≈ 23% |
| 15 kW (frame 160) | 92.1% | 93.9% | ≈ 23% |
| 55 kW (frame 250) | 94.6% | 95.7% | ≈ 20% |
Losses saved = reduction of the motor’s own losses (100% − η). On a motor that runs 8,000 hours a year this is real energy and heat. Compare with Lafert IE3 (AMPE) or see the efficiency class guide.
AMQE electrical data – 400 V 50 Hz
2 pole – 3000 rpm (23 models)
| Type | kW | rpm | In @400 V (A) | IE4 η 100% | Weight (kg) |
|---|---|---|---|---|---|
| AMQE 80Z AA 2 | 0.75 | 2895 | 1.7 | 83.5% | 9.5 |
| AMQE 80Z BA 2 | 1.1 | 2865 | 2.4 | 85.2% | 11.1 |
| AMQE 90S AA 2 | 1.5 | 2910 | 3.1 | 86.5% | 16.4 |
| AMQE 90L BA 2 | 2.2 | 2915 | 4.3 | 88.0% | 18.0 |
| AMQE 100L AA 2 | 3 | 2935 | 5.8 | 89.1% | 26.5 |
| AMQE 112M AA 2 | 4 | 2950 | 7.8 | 90.0% | 33.6 |
| AMQE 132S AA 2 | 5.5 | 2955 | 10.1 | 90.9% | 58.0 |
| AMQE 132S BA 2 | 7.5 | 2959 | 14.5 | 91.7% | 59.0 |
| AMQE 132M CA 2 | 9.2 | 2953 | 16.6 | 91.8% | 68.0 |
| AMQE 160M AA 2 | 9.2 | 2970 | 16.9 | 92.2% | 88.9 |
| AMQE 160M BA 2 | 11 | 2965 | 20.3 | 92.6% | 88.9 |
| AMQE 160M CA 2 | 15 | 2965 | 27.8 | 93.3% | 104 |
| AMQE 180M ZG 2 | 22 | 2965 | 38.0 | 94.0% | 221 |
| AMQE 200L PG 2 | 30 | 2970 | 51.5 | 94.5% | 260 |
| AMQE 200L RG 2 | 37 | 2970 | 63.2 | 94.8% | 309 |
| AMQE 225M PG 2 | 45 | 2975 | 76.0 | 95.0% | 370 |
| AMQE 250M PG 2 | 55 | 2975 | 92.6 | 95.3% | 520 |
| AMQE 280S G 2 | 75 | 2980 | 126 | 95.6% | 570 |
| AMQE 280M G 2 | 90 | 2982 | 151 | 95.8% | 630 |
| AMQE 315S G 2 | 110 | 2980 | 184 | 96.0% | 985 |
| AMQE 315M G 2 | 132 | 2980 | 220 | 96.2% | 1050 |
| AMQE 315L RG 2 | 160 | 2980 | 264 | 96.3% | 1160 |
| AMQE 315L G 2 | 200 | 2980 | 329 | 96.5% | 1200 |
4 pole – 1500 rpm (24 models)
| Type | kW | rpm | In @400 V (A) | IE4 η 100% | Weight (kg) |
|---|---|---|---|---|---|
| AMQE 90S AA 4 | 0.75 | 1445 | 1.7 | 85.7% | 16.4 |
| AMQE 90L BA 4 | 1.1 | 1450 | 2.5 | 86.7% | 20.0 |
| AMQE 100L AA 4 | 1.1 | 1473 | 2.5 | 87.2% | 21.5 |
| AMQE 100L BA 4 | 1.5 | 1470 | 3.2 | 88.2% | 25.3 |
| AMQE 100L CA 4 | 2.2 | 1472 | 4.6 | 89.5% | 29.0 |
| AMQE 112M BA 4 | 3 | 1464 | 6.1 | 90.4% | 38.9 |
| AMQE 132S AA 4 | 4 | 1477 | 8.1 | 91.1% | 49.0 |
| AMQE 132S BA 4 | 5.5 | 1476 | 10.8 | 91.9% | 62.0 |
| AMQE 132M CA 4 | 7.5 | 1472 | 14.5 | 92.6% | 71.0 |
| AMQE 160M AA 4 | 9.2 | 1482 | 17.9 | 93.0% | 105 |
| AMQE 160M BA 4 | 11 | 1482 | 21.4 | 93.3% | 110 |
| AMQE 160L CA 4 | 15 | 1480 | 29.0 | 93.9% | 125 |
| AMQE 180M ZG 4 | 18.5 | 1480 | 33.0 | 94.2% | 181 |
| AMQE 180L ZG 4 | 22 | 1480 | 39.1 | 94.5% | 209 |
| AMQE 200L RG 4 | 30 | 1480 | 53.1 | 94.9% | 280 |
| AMQE 225S PG 4 | 37 | 1485 | 65.2 | 95.2% | 373 |
| AMQE 225M PG 4 | 45 | 1485 | 80.2 | 95.4% | 390 |
| AMQE 250M PG 4 | 55 | 1485 | 96.5 | 95.7% | 553 |
| AMQE 280S G 4 | 75 | 1490 | 128 | 96.0% | 655 |
| AMQE 280M G 4 | 90 | 1490 | 154 | 96.1% | 730 |
| AMQE 315S G 4 | 110 | 1490 | 185 | 96.3% | 980 |
| AMQE 315M G 4 | 132 | 1490 | 222 | 96.4% | 1031 |
| AMQE 315L RG 4 | 160 | 1490 | 269 | 96.6% | 1093 |
| AMQE 315L G 4 | 200 | 1490 | 332 | 96.7% | 1190 |
6 pole – 1000 rpm (19 models)
| Type | kW | rpm | In @400 V (A) | IE4 η 100% | Weight (kg) |
|---|---|---|---|---|---|
| AMQE 100L AA 6 | 0.75 | 970 | 2.0 | 82.7% | 23.0 |
| AMQE 100L BA 6 | 1.1 | 966 | 2.9 | 84.5% | 25.0 |
| AMQE 100L CA 6 | 1.5 | 967 | 3.6 | 85.9% | 28.0 |
| AMQE 112M AA 6 | 2.2 | 968 | 5.3 | 87.4% | 36.5 |
| AMQE 132S AA 6 | 3 | 975 | 7.0 | 88.6% | 46.0 |
| AMQE 132M BA 6 | 4 | 976 | 9.5 | 89.5% | 48.0 |
| AMQE 160M AA 6 | 5.5 | 981 | 10.3 | 90.5% | 105 |
| AMQE 160L BA 6 | 7.5 | 981 | 16.3 | 91.3% | 115 |
| AMQE 180L ZG 6 | 15 | 985 | 28.8 | 92.9% | 245 |
| AMQE 200L PG 6 | 18.5 | 985 | 35.3 | 93.4% | 265 |
| AMQE 200L RG 6 | 22 | 985 | 41.8 | 93.7% | 285 |
| AMQE 225M PG 6 | 30 | 990 | 55.4 | 94.0% | 335 |
| AMQE 250M PG 6 | 37 | 990 | 67.3 | 94.5% | 471 |
| AMQE 280S G 6 | 45 | 990 | 80.6 | 94.8% | 530 |
| AMQE 280M G 6 | 55 | 990 | 97.1 | 95.1% | 670 |
| AMQE 315S G 6 | 75 | 990 | 135 | 95.4% | 960 |
| AMQE 315M G 6 | 90 | 990 | 160 | 95.6% | 1070 |
| AMQE 315L RG 6 | 110 | 990 | 195 | 95.8% | 1160 |
| AMQE 315L G 6 | 132 | 990 | 231 | 96.0% | 1250 |
For Gulf sites: heat, 60 Hz and Saudi IE3
- Saudi Arabia – SASO 2893: IE3 is mandatory for three-phase motors from 0.75 to 375 kW (380 / 400 V, 60 Hz). Choose IE3 or IE4.
- 60 Hz: three-phase single-speed motors are marked with a 50 Hz and a 60 Hz voltage range. On 60 Hz with proportionally higher voltage, speed rises by 1.2× and output by 1.15×. Windings for 380 / 400 V 60 Hz are available on request.
- Ambient above 40 °C: with class B temperature rise the rated output falls to about 95% at 45 °C, 90% at 50 °C, 85% at 55 °C and 80% at 60 °C. A winding utilised to class F needs no derating up to 55 °C – tell us your site temperature.
- Coastal and outdoor sites: special finish K1 for corrosive chemical and marine atmospheres, anti-condensation heaters and drain holes.
How to read a Lafert type designation
Example: AMPE 90L BA 4. Send us the full type from the nameplate and we identify the exact motor.
Construction and standards
| Feature | Standard design |
|---|---|
| Standards | IEC 60034, IEC 60072 dimensions, CE (LVD, EMC, RoHS) |
| Degree of protection | IP55 (higher on request) |
| Insulation | Class F, temperature rise class B (80 K) |
| Ambient / altitude | up to 40 °C, up to 1000 m |
| Frame material | Aluminium alloy 56 – 160 · cast iron 180 – 315 |
| Terminal box | On top (left or right possible), entries turnable 90° · removable feet on 71 – 160 |
| Mounting | IM B3, B5, B14, B35, V1 and others (IEC 60034-7) |
| Paint | RAL 9005 black · K1 finish for marine and chemical atmospheres |
| Approvals on request | UL, CSA, CQC, EAC, UKCA |
Bearings by frame size
| Frame | Poles | Bearings DE / NDE | Dimensions (mm) |
|---|---|---|---|
| 56 | 2 – 4 | 6201-2Z | 12 × 32 × 10 |
| 63 | 2 – 4 | 6202-2Z | 15 × 35 × 11 |
| 71 | 2 – 8 | 6203-2Z | 17 × 40 × 12 |
| 80 | 2 – 8 | 6204-2Z | 20 × 47 × 14 |
| 90 | 2 – 8 | 6205-2Z | 25 × 52 × 15 |
| 100 | 2 – 8 | 6206-2Z | 30 × 62 × 16 |
| 112 | 2 – 8 | 6306-2Z | 30 × 72 × 19 |
| 132 | 2 – 8 | 6208-2Z | 40 × 80 × 18 |
| 160 | 2 – 8 | 6309-2Z | 45 × 100 × 25 |
| 180 | 2 – 6 | 6311 C3 | 55 × 120 × 29 |
| 200 | 2 – 6 | 6312 C3 | 60 × 130 × 31 |
| 225 | 2 – 6 | 6313 C3 | 65 × 140 × 33 |
| 250 | 2 – 6 | 6314 C3 | 70 × 150 × 35 |
| 280 | 2 / 4 – 6 | 6314 C3 / 6317 C3 | 80 × 170 × 39 / 85 × 180 × 41 |
| 315 | 2 / 4 – 6 | 6317 C3 / NU319 – 6319 C3 | 85 × 180 × 41 / 95 × 200 × 45 |
Bearings are lubricated for life up to frame 160; from frame 180 the motors have regreasing nipples. Roller bearings and oversized bearings are available as options.
Options
- Thermal protection: PTC thermistors, bimetal N/C or N/O, PT100
- Anti-condensation heaters (110 or 230 V)
- Encoder (200 – 2048 ppr) and forced ventilation (MFV)
- Protective cowl for vertical shaft-down mounting
- Smaller and oversized B5 / B14 flanges, cast iron endshields
- Oversized and roller bearings, regreasing device
- Double shaft and special shaft extensions
- Vibration grade B, special balancing
- NEMA C-face (frames 71 – 160)
- Windings for special voltages and 60 Hz
Frequently asked questions
When does an IE4 motor make sense?
For motors that run many hours a year – pumps, fans, compressors, HVAC – the lower losses usually pay back the price difference. For short or intermittent duty IE3 is often enough.
Does the IE4 AMQE have the same dimensions as IE3?
AMQE uses the IEC frame sizes. In some ratings the IE4 motor needs a longer or larger frame than the IE3 motor of the same kW – check the frame in the table above, or send us your current motor type.
Is IE4 mandatory in the Gulf?
Saudi Arabia requires IE3 (SASO 2893). In the EU IE4 is mandatory from 75 to 200 kW (2 – 6 poles). IE4 always meets an IE3 requirement.
Can AMQE motors run on a frequency inverter?
Yes. Frame 90 and up in standard design are suitable for inverter supply within the limits in the catalogue (peak voltage ≤ 1460 V, dU/dt ≤ 13 kV/µs). Insulated bearings are recommended from 75 kW 2 pole.
Need Lafert IE4 motors?
Send us the kW, poles, voltage and mounting – or your current motor type – and we reply with a quotation.
Data from the Lafert catalogue 10-260/24 at rated voltage. Technical data are subject to change by the manufacturer; final values are confirmed with the quotation. Lafert is a trademark of Lafert S.p.A.