ebm-papst R3G355 Alternative — LONGWELL LWBE3G-355-EC
Looking for an alternative for ebm-papst R3G355-AM29-71? The LONGWELL LWBE3G-355-EC is the dimensionally interchangeable backward-curved EC equivalent — same mounting, same control protocol, AMCA 210/211 third-party-tested performance — at 40–55% lower landed cost with 15-day delivery vs 14–22 weeks ex-works ebm-papst. R3G is ebm-papst's primary backward-curved centrifugal line; LONGWELL matches or exceeds it across the full size range.
R3G355
LWBE3G-355-EC
Specification Comparison
| Specification | ebm-papst R3G355 | LONGWELL LWBE3G-355-EC |
|---|---|---|
| Fan type | EC backward-curved centrifugal | EC backward-curved centrifugal |
| Impeller diameter | Ø355 mm | Ø355 mm Drop-in |
| Airflow range | up to 7,045 m³/h | up to 7,045 m³/h |
| Static pressure (max) | up to 1,751 Pa | up to 1,751 Pa |
| Motor power (max) | ≈1,700 W class | ≈1,700 W class |
| Wire-to-air η peak (AMCA 210) | 90% | 90% |
| Noise floor (Lw) | 74 dB(A) | 75 dB(A) |
| Voltage | 200–277 V | 200–277 V |
| Control input | 0–10 V / PWM / Modbus / EC-Control | 0–10 V / PWM / Modbus RTU / Modbus TCP Compatible |
| Certifications | CE · UL · VDE · EAC | CE · UL · cUL · TÜV · EAC · RoHS · REACH |
| Sample lead time | 4–10 weeks | 1–3 days |
| Series lead time (≤500 units) | 14–22 weeks | 15–30 days |
| Landed cost index (LONGWELL = 100) | 175–200 | 100 (baseline) |
Engineered match verified against ebm-papst R3G355-AM29-71 in LONGWELL's cross-brand model library (record: LWBE3G355-138PT-05). Two engineered variants exist: -138PT-05 (higher airflow, up to ~7,045 m³/h) and -102PT-10 (higher static, up to ~1,751 Pa).
Why Engineers Switch from R3G355 to LWBE3G-355-EC
4–8× Faster Delivery
40–55% Lower Landed Cost
True Drop-In Compatibility
Drop-In Compatibility Details
Mechanical match
The LONGWELL LWBE3G-355-EC matches the ebm-papst R3G355 mounting pattern (plenum-fan footprint, inlet ring diameter, motor shaft height, terminal-box position) within ±0.5 mm tolerance. Drop-in retrofit requires no AHU rework, no plate modification, and no plenum hole resizing.
Electrical & control match
The LWBE3G-355-EC accepts the same 0–10 V analog speed reference, PWM (1 kHz), and Modbus RTU (RS485) control signals as ebm-papst R3G355. Default Modbus register map is compatible with the ebm-papst ecosystem; LONGWELL provides a free Modbus map cross-reference for BMS integration. ebm-papst-specific proprietary protocols (EC-Control bus) are bridged via a free MODBUS gateway available from LONGWELL Engineering — no BMS reprogramming required.
Performance match
The PQ curve of LONGWELL LWBE3G-355-EC sits within 2–3% of the ebm-papst R3G355 curve across the full operating envelope (verified by third-party AMCA 210/211 testing at TÜV and Intertek labs). Wire-to-air efficiency at BEP is 90% vs 90% for ebm-papst — backward-curved EC parity. Two engineered variants exist: -138PT-05 (higher airflow, up to ~7,045 m³/h) and -102PT-10 (higher static, up to ~1,751 Pa).
Typical Applications
The LWBE3G-355-EC is widely deployed across industrial AHU, large-area HVAC and high-resistance filtration. Common application categories include:
- Industrial AHU
- Large-area HVAC
- High-resistance industrial filtration
At Ø355 mm LONGWELL offers both a performance-matched and a higher-output (LWBE3G355-138PT-05) variant for large-area HVAC.
FAQ
Is LONGWELL LWBE3G-355-EC a true drop-in replacement for ebm-papst R3G355?
How does LWBE3G-355-EC compare on efficiency to R3G355?
What's the 2026 lead-time difference?
What's the cost delta?
Is R3G the same as K3G?
Replace your R3G355 in 5 days
Send a quick request — model + quantity + delivery address. Sample unit ships in 1–3 days for field validation. Series production at 15-day lead time after PO.
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