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ebm-papst R3G400 Alternative — LONGWELL LWBE3G400

Looking for an alternative for ebm-papst R3G400-AD32-71? The LONGWELL LWBE3G400 has the same impeller diameter. Catalogue ratings, measured curves and dimensioned drawings for every model are on the LONGWELL Fan Selector; final selection is made at your duty point. R3G is ebm-papst's primary backward-curved centrifugal line; LONGWELL covers this size in the LWBE3G400 series.

Reference model: ebm-papst R3G400-AD32-71 Diameter: Ø400 mm Family: R3G → LONGWELL LWBE3G (backward-curved EC) Sample: 1–3 days
Reference model
ebm-papst
R3G400
R3G · EC backward-curved centrifugal · Ø400 mm
→
LONGWELL series
LONGWELL
LWBE3G400
Same impeller diameter (Ø400 mm) · dimensions per LONGWELL drawing · 15–30 day production lead time

Specification Comparison

Specification ebm-papst R3G400 LONGWELL LWBE3G400
Fan type EC backward-curved centrifugal EC backward-curved centrifugal
Impeller diameter Ø400 mm Ø400 mm 13 models
Airflow range up to 7,459 m³/h up to 9,682 m³/h
Static pressure (max) up to 980 Pa up to 1,627 Pa
Motor power (max) ≈1,100 W class up to 2,060 W
Noise floor (Lw) 75 dB(A) from 62 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 · ETL on single-phase 115/230 V versions (UL 507 / CSA C22.2 No.113)
Sample lead time Per manufacturer quotation 1–3 days
Series lead time (≤500 units) Per manufacturer quotation 15–30 days
Pricing Per manufacturer quotation Quoted per project
Verify it on the LONGWELL selector: all 13 LWBE3G400 models — data, measured curves, drawings · LWBE3G400-188NT-17 (largest airflow in the series) · check your own duty point · samples, MOQ and lead time

Matched to ebm-papst R3G400-AD32-71 by impeller size and fan type — LONGWELL model LWBE3G400-138PT-04. Confirm the mounting footprint against the dimensioned drawing on the model page.

LWBE3G400 at a glance

Production Lead Time

15–30 days
Ex works for production batches. Sample units 1–3 days from stock.

Pricing

Quoted per project
Price depends on model, voltage, control option and quantity. Sample fees are credited in full against the first production order.

Same Impeller Diameter

Ø400 mm
Same impeller diameter; confirm the mounting hole pattern and inlet ring against the LONGWELL drawing before ordering.

Installation and control: what to check

Mechanical

Mounting dimensions of the LONGWELL LWBE3G400 are given on its dimensioned drawing. Confirm the mounting dimensions against the LONGWELL drawing before ordering.

Electrical & control

The LONGWELL LWBE3G400 accepts a 0–10 V analog speed reference, PWM and Modbus RTU (RS485) control signals (per model; see the model datasheet). LONGWELL supplies its Modbus register map for BMS integration. For other bus protocols, ask LONGWELL engineering for the integration options.

Performance

The measured P-Q curve of every LONGWELL model is on its model page; we check your duty point against it before quoting. The LWBE3G400-138PT-04 variant carries higher airflow than the original at the same frame for capacity-uplift retrofits.

Typical Applications

The LWBE3G400 is typically specified for large AHU, industrial ventilation and fan-grid arrays. Common application categories include:

  • Large AHU
  • Industrial ventilation
  • Fan-grid arrays

The 400 mm size moves into fan-grid territory — multiple units arrayed for redundancy and turndown in large AHU.

FAQ

What should I check before using LONGWELL LWBE3G400 in place of ebm-papst R3G400?
The impeller diameter is the same — confirm the mounting hole pattern and inlet ring against the LONGWELL drawing on the model page. Available control inputs (0–10 V / PWM / Modbus RTU) and voltages are listed in the table above. Confirm the mounting hole pattern and inlet ring against the LONGWELL drawing on the model page. Matched model: LWBE3G400-138PT-04.
Where can I find efficiency data for LWBE3G400?
LONGWELL does not publish a single peak-efficiency figure for the LWBE3G400. 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 is the LONGWELL lead time?
LONGWELL LWBE3G400 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 Ø400 mm inventory.
How is LONGWELL pricing determined?
LONGWELL quotes per project. 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 R3G400 specifically; for the RadiCal equivalent see the K3G400 page in the alternatives index.

Evaluate a LONGWELL alternative to R3G400 — 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 LWBE3G400 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.