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ebm-papst R3G250 Alternative — LONGWELL LWBE3G250

Looking for an alternative for ebm-papst R3G250-AK41-71? The LONGWELL LWBE3G250 is the same-size 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. Widely deployed across high-static AHU, FFU filter systems, compact CRAH.

Replaces: ebm-papst R3G250-AK41-71 Diameter: Ø250 mm Family: R3G → LONGWELL LWBE3G (backward-curved EC) Sample: 1–3 days
Replacing
ebm-papst
R3G250
R3G · EC backward-curved centrifugal · Ø250 mm
→
With
LONGWELL
LWBE3G250
Same size class (Ø250 mm) — mounting per drawing · Same control · 15–30 day delivery

Specification Comparison

Specification ebm-papst R3G250 LONGWELL LWBE3G250
Fan type EC backward-curved centrifugal EC backward-curved centrifugal
Impeller diameter Ø250 mm Ø250 mm 29 models
Airflow range up to 2,100 m³/h up to 3,708 m³/h
Static pressure (max) up to 1,000 Pa up to 1,751 Pa
Motor power (max) ≈485 W up to 1,000 W
Noise floor (Lw) 70 dB(A) from 62 dB(A) (nameplate, per model)
Voltage 200–277 V 220–230 / 115 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)
Verify it on the LONGWELL selector: all 29 LWBE3G250 models — data, measured curves, drawings · LWBE3G250-102NT-21 (largest airflow in the series) · check your own duty point · samples, MOQ and lead time

Why Engineers Switch from R3G250 to LWBE3G250

4–8× Faster Delivery

15–30 days
vs 14–22 weeks ex-works for ebm-papst in 2026. Sample units 1–3 days from stock vs 4–10 weeks.

40–55% Lower Landed Cost

−€600 to −€2,400
per unit at equivalent spec, depending on size and quantity. On a 50-unit FanGrid retrofit, typical CapEx delta is €30k–€120k.

Drop-in Candidate · Same Size Class

Ø250 mm
Same impeller size and control protocol; confirm the mounting hole pattern and inlet ring against the LONGWELL drawing before ordering.

Drop-in compatibility: what matches and what to confirm

Mechanical match

The LONGWELL LWBE3G250 matches the ebm-papst R3G250 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 LWBE3G250 accepts the same 0–10 V analog speed reference, PWM (1 kHz), and Modbus RTU (RS485) control signals as ebm-papst R3G250. 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. 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 LWBE3G250 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 LWBE3G250 a true drop-in replacement for ebm-papst R3G250?
Same size class and control interface — confirm the mounting hole pattern and inlet ring against the LONGWELL drawing on the model page. It accepts the same 0–10 V / PWM / Modbus RTU control, and runs from the same 200–277 V supply. Confirm the mounting hole pattern and inlet ring against the LONGWELL drawing on the model page. Matched model: LWBE3G250-102PT-08.
How does LWBE3G250 compare on efficiency to R3G250?
LONGWELL does not publish a single peak-efficiency figure for the LWBE3G250. The model page on the selection site gives airflow, static pressure and input power along the curve (measured where marked, nameplate-estimated otherwise), so the efficiency at your duty point follows directly; a test report for a specific model is available from engineering on request.
What's the 2026 lead time difference?
As of May 2026: ebm-papst R3G250 requires 14–22 weeks ex-works due to ongoing allocation. LONGWELL LWBE3G250 ships in 15–30 days for orders up to 500 units and 6–10 weeks for 1,000+ unit OEM programs. Sample units ship in 1–3 days from stocked Ø250 mm inventory.
What's the cost delta?
At equivalent specification (same Ø, same airflow/Pa, same IP, same control), LONGWELL LWBE3G250 typically lands at 40–55% below ebm-papst R3G250 ex-works pricing. Final pricing depends on quantity, voltage, IP rating, and control protocol options.
Is R3G the same as K3G?
No. R3G is ebm-papst's standard backward-curved centrifugal line; K3G (RadiCal) is the aerodynamically-optimised variant. They share frame sizes but differ in wheel design and part number. This page maps the R3G250 specifically; for the RadiCal equivalent see the K3G250 page in the alternatives index.

Replace your R3G250 — 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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Official Product Page
Browse the full Backward-Curved Centrifugal EC Fans range on longwellfans.com — request a quote on LWBE3G250 directly.
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ebm-papst® is a registered trademark of ebm-papst Group. LONGWELL is an independent manufacturer and is not affiliated with, endorsed by, or sponsored by ebm-papst. Any references to third-party trademarks are used solely for identification and comparison purposes. All performance figures reflect specific test conditions; final selection should be confirmed by duty point, voltage/control, mounting and project validation.