ebm-papst R3G355 Alternative — LONGWELL LWBE3G355
Looking for an alternative for ebm-papst R3G355-AM29-71? The LONGWELL LWBE3G355 is the same-size backward-curved EC alternative — same control protocol, mounting dimensions on the LONGWELL drawing, performance characterized using AMCA 210/211 test methods (test report on request) — at 40–55% lower landed cost with 15–30 day delivery vs 14–22 weeks ex-works ebm-papst. R3G is ebm-papst's primary backward-curved centrifugal line; LONGWELL covers this size in the LWBE3G355 series.
R3G355
LWBE3G355
Specification Comparison
| Specification | ebm-papst R3G355 | LONGWELL LWBE3G355 |
|---|---|---|
| Fan type | EC backward-curved centrifugal | EC backward-curved centrifugal |
| Impeller diameter | Ø355 mm | Ø355 mm 21 models |
| Airflow range | up to 7,045 m³/h | up to 8,034 m³/h |
| Static pressure (max) | up to 1,751 Pa | up to 2,524 Pa |
| Motor power (max) | ≈1,700 W class | up to 3,100 W |
| Noise floor (Lw) | 74 dB(A) | from 68 dB(A) (nameplate, per model) |
| Voltage | 200–277 V | 220–230 V 1Φ · 380–400 V 3Φ |
| Control input | 0–10 V / PWM / Modbus / EC-Control | 0–10 V / PWM / Modbus RTU (RS485) |
| Certifications | CE · UL · VDE · EAC | CE · RoHS · REACH · ETL on single-phase 115/230 V versions (UL 507 / CSA C22.2 No.113) |
| 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) |
Matched to ebm-papst R3G355-AM29-71 by impeller size and fan type — LONGWELL model LWBE3G355-138PT-05. Confirm the mounting footprint against the dimensioned drawing on the model page.
Why Engineers Switch from R3G355 to LWBE3G355
4–8× Faster Delivery
40–55% Lower Landed Cost
Drop-in Candidate · Same Size Class
Drop-in compatibility: what matches and what to confirm
Mechanical match
The LONGWELL LWBE3G355 matches the ebm-papst R3G355 mounting pattern (plenum-fan footprint, inlet ring diameter, motor shaft height, terminal-box position) per the mounting dimensions on the LONGWELL drawing. In most retrofits no plate modification is needed — confirm the mounting dimensions against the LONGWELL drawing before ordering.
Electrical & control match
The LWBE3G355 accepts the same 0–10 V analog speed reference, PWM (1 kHz), and Modbus RTU (RS485) control signals as ebm-papst R3G355. LONGWELL provides the Modbus register map and a cross-reference to the ebm-papst map for BMS integration. For ebm-papst-specific bus protocols (EC-Control), ask LONGWELL engineering for the integration options.
Performance match
The measured P-Q curve of every LONGWELL model is on its model page; we check your duty point against it before quoting. 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 LWBE3G355 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 LWBE3G355 a true drop-in replacement for ebm-papst R3G355?
How does LWBE3G355 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 — samples in 1–3 days
Send a quick request — model + quantity + delivery address. Sample unit ships in 1–3 days for field validation. Series production at 15–30 day lead time after PO.
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