ebm-papst R3G250 Alternative — LONGWELL LWBE3G-250-EC
Looking for an alternative for ebm-papst R3G250-AK41-71? The LONGWELL LWBE3G-250-EC is the dimensionally interchangeable 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. Widely deployed across high-static AHU, FFU filter systems, compact CRAH.
R3G250
LWBE3G-250-EC
Specification Comparison
| Specification | ebm-papst R3G250 | LONGWELL LWBE3G-250-EC |
|---|---|---|
| Fan type | EC backward-curved centrifugal | EC backward-curved centrifugal |
| Impeller diameter | Ø250 mm | Ø250 mm Drop-in |
| Airflow range | up to 2,100 m³/h | up to 2,100 m³/h |
| Static pressure (max) | up to 1,000 Pa | up to 1,000 Pa |
| Motor power (max) | ≈485 W | ≈485 W |
| Wire-to-air η peak (AMCA 210) | 88% | 88% |
| Noise floor (Lw) | 70 dB(A) | 71 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) |
Why Engineers Switch from R3G250 to LWBE3G-250-EC
4–8× Faster Delivery
40–55% Lower Landed Cost
True Drop-In Compatibility
Drop-In Compatibility Details
Mechanical match
The LONGWELL LWBE3G-250-EC matches the ebm-papst R3G250 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-250-EC accepts the same 0–10 V analog speed reference, PWM (1 kHz), and Modbus RTU (RS485) control signals as ebm-papst R3G250. 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-250-EC sits within 2–3% of the ebm-papst R3G250 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 88% vs 88% for ebm-papst — backward-curved EC parity. In typical part-load HVAC duty, the gap narrows to within 1 pp. The LWBE3G250-102PT-08 variant carries the duty into the higher-static band (up to ~1,000 Pa) for filter-loaded AHU.
Typical Applications
The LWBE3G-250-EC is widely deployed across high-static AHU, FFU filter systems, compact CRAH. Common application categories include:
- High-resistance AHU
- Cleanroom FFU systems
- Compact data-center CRAH
Particularly suited for AHU with high duct/filter resistance and FFU cleanroom modules requiring stable static at Ø250 mm.
FAQ
Is LONGWELL LWBE3G-250-EC a true drop-in replacement for ebm-papst R3G250?
How does LWBE3G-250-EC compare on efficiency to R3G250?
What's the 2026 lead time difference?
What's the cost delta?
Is R3G the same as K3G?
Replace your R3G250 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.
Request Sample View Full Cross-Reference Table