ebm-papst R3G310 Alternative — LONGWELL LWBE3G-310-EC

Looking for an alternative for ebm-papst R3G310-AI39-71? The LONGWELL LWBE3G-310-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 data-center CRAH, commercial AHU, cold-chain condensing units.

Replaces: ebm-papst R3G310-AI39-71 Diameter: Ø310 mm Family: R3G → LONGWELL LWBE3G (backward-curved EC) Sample: 1–3 days

Replacing

ebm-papst
R3G310

R3G · EC backward-curved centrifugal · Ø310 mm

→

With

LONGWELL
LWBE3G-310-EC

Drop-in dimensional match · Same control · 15-day delivery

Specification Comparison

Specification	ebm-papst R3G310	LONGWELL LWBE3G-310-EC
Fan type	EC backward-curved centrifugal	EC backward-curved centrifugal
Impeller diameter	Ø310 mm	Ø310 mm Drop-in
Airflow range	up to 3,500 m³/h	up to 3,500 m³/h
Static pressure (max)	up to 670 Pa	up to 670 Pa
Motor power (max)	≈500 W	≈500 W
Wire-to-air η peak (AMCA 210)	89%	89%
Noise floor (Lw)	72 dB(A)	73 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 R3G310 to LWBE3G-310-EC

4–8× Faster Delivery

15–30 days

vs 14–22 weeks ex-works for ebm-papst in 2026 (active allocation). 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 multi-unit AHU / fan-grid program the CapEx delta scales fast.

−56% Input Power at Duty

220 W

vs 500 W for the original at the matched 310 mm AHU/CRAH duty — a strong part-load energy retrofit case.

Drop-In Compatibility Details

Mechanical match

The LONGWELL LWBE3G-310-EC matches the ebm-papst R3G310 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-310-EC accepts the same 0–10 V analog speed reference, PWM (1 kHz), and Modbus RTU (RS485) control signals as ebm-papst R3G310. 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-310-EC sits within 2–3% of the ebm-papst R3G310 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 89% vs 89% for ebm-papst — backward-curved EC parity. The LWBE3G310-092PS-08 match is an energy-saving selection at the stated duty point.

Typical Applications

The LWBE3G-310-EC is widely deployed across mid-range data-center CRAH and commercial AHU. Common application categories include:

Data-center mid-range CRAH
Commercial AHU
Cold-chain condensing units

A high-volume retrofit size for mid-range data-center and commercial AHU plug-fan replacements.

FAQ

Is LONGWELL LWBE3G-310-EC a true drop-in replacement for ebm-papst R3G310?

Yes. The LWBE3G-310-EC matches the R3G310 dimensionally (mounting hole pattern, inlet ring diameter, motor shaft height) within ±0.5 mm, accepts the same 0–10 V / PWM / Modbus RTU control, and runs from the same 200–277 V supply. Installation is identical to a same-brand replacement. Verified library record: LWBE3G310-092PS-08.

How does LWBE3G-310-EC compare on efficiency to R3G310?

ebm-papst R3G310 delivers ~89% peak wire-to-air efficiency at BEP. LONGWELL LWBE3G-310-EC measures ~89% in AMCA 210/211 third-party testing — backward-curved EC parity. In typical part-load HVAC duty, the gap narrows to within 1 pp because both platforms hold flat η curves across their operating range.

What's the 2026 lead time difference?

As of May 2026: ebm-papst R3G310 requires 14–22 weeks ex-works due to ongoing allocation. LONGWELL LWBE3G-310-EC 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 Ø310 mm inventory.

What's the cost delta?

At equivalent specification (same Ø, same airflow/Pa, same IP, same control), LONGWELL LWBE3G-310-EC typically lands at 40–55% below ebm-papst R3G310 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 R3G310 specifically; for the RadiCal equivalent see the K3G310 page in the alternatives index.

Replace your R3G310 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

Official Product Page

Browse the full Backward-Curved Centrifugal EC Fans range on longwellfans.com — request a quote on LWBE3G-310-EC 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.