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ebm-papst K3G1250 Alternative — LONGWELL LWBE3G630

Looking for an alternative for ebm-papst K3G1250-AY58-X1? The LONGWELL LWBE3G630 is the nearest listed size (Ø630 mm); a Ø1250 mm drop-in is not in the current catalogue — same control protocol, performance characterized using AMCA 210/211 test methods (test report on request) — at 40–55% lower landed cost with 15–30 day delivery vs 20–26 weeks ex-works ebm-papst. Widely deployed across Mega-scale industrial process, mining main fans, tunnel ventilation.

Replaces: ebm-papst K3G1250-AY58-X1 Diameter: Ø1250 mm Family: RadiCal / K3G-series → LONGWELL LWBE3G / LWAE3G / LWHV / LWFC Sample: 1–3 days
Replacing
ebm-papst
K3G1250
RadiCal / K3G-series · EC backward-curved centrifugal plug fan · Ø1250 mm
→
With
LONGWELL
LWBE3G630
Nearest listed size (not a drop-in) · Same control · 15–30 day delivery

Specification Comparison

Specification ebm-papst K3G1250 LONGWELL LWBE3G630
Fan type EC backward-curved centrifugal plug fan EC backward-curved centrifugal plug fan
Impeller diameter Ø1250 mm No listed Ø1250 mm model — nearest listed size Ø630 mm (LWBE3G630, 7 models)
Airflow range 5,500–40,000 m³/h up to 21,742 m³/h per Ø630 unit — larger duties as FanGrid arrays
Static pressure (max) 1500 Pa up to 1,677 Pa (Ø630 unit)
Motor power (max) 25,000 W up to 5,600 W per unit
Noise floor (Lw) 52 dB(A) from 66 dB(A) (nameplate, per model)
Voltage 380–480 V 3Φ 380–400 V 3Φ
Control input 0–10 V / PWM / Modbus / EC-Control 0–10 V / PWM / Modbus RTU (RS485)
IP rating IP54 / IP55 IP54 std · IP55 / IP67 option
Certifications CE · UL · VDE · EAC CE · RoHS · REACH · ETL on request
Sample lead time 4–10 weeks 1–3 days
Series lead time (≤500 units) 20–26 weeks 15–30 days
Landed cost index (LONGWELL = 100) 175–200 100 (baseline)
Verify it on the LONGWELL selector: all 7 LWBE3G630 models — data, measured curves, drawings · LWBE3G630-188NT-09 (largest airflow in the series) · check your own duty point · samples, MOQ and lead time

Why Engineers Switch from K3G1250 to LWBE3G630

4–8× Faster Delivery

15–30 days
vs 20–26 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.

Nearest size + FanGrid option

Ø630 mm
nearest listed size with the same 0–10 V / PWM / Modbus RTU control; mounting per the LONGWELL drawing (not a drop-in for Ø1250 mm).

Drop-in compatibility: what matches and what to confirm

Mechanical match

LONGWELL does not currently list a Ø1250 mm unit in this family. The nearest listed size is Ø630 mm (LWBE3G630); for the airflow of a single Ø1250 mm fan, engineering proposes 2–4 smaller EC units in a FanGrid array or a custom development — mounting is not a drop-in.

Electrical & control match

The LWBE3G630 accepts the same 0–10 V analog speed reference, PWM (1 kHz), and Modbus RTU (RS485) control signals as ebm-papst K3G1250. 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.

Typical Applications

The LWBE3G630 is widely deployed across Mega-scale industrial process, mining main fans, tunnel ventilation. Common application categories include:

  • Mega-scale process
  • Mining main fan
  • Tunnel ventilation

Particularly suited for mining main ventilation fans and tunnel + industrial mega-process duty.

FAQ

Is LONGWELL LWBE3G630 a true drop-in replacement for ebm-papst K3G1250?
Not as a drop-in: LONGWELL does not list a Ø1250 mm model in this family. The nearest listed size is Ø630 mm (LWBE3G630); for equal airflow we propose a FanGrid array of smaller EC units or a custom development. Ask engineering with your duty point.
How does LWBE3G630 compare on efficiency to K3G1250?
LONGWELL does not publish a single peak-efficiency figure for the LWBE3G630. 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 K3G1250 requires 20–26 weeks ex-works due to ongoing allocation. LONGWELL LWBE3G630 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 Ø1250 mm inventory.
What's the cost delta?
At equivalent specification (same Ø, same airflow/Pa, same IP, same control), LONGWELL LWBE3G630 typically lands at 40–55% below ebm-papst K3G1250 ex-works pricing. Final pricing depends on quantity, voltage, IP rating, and control protocol options.
What applications is LWBE3G630 typically used for?
LWBE3G630 is widely deployed across Mega-scale industrial process, mining main fans, tunnel ventilation. Particularly suited for mining main ventilation fans and tunnel + industrial mega-process duty.

Replace your K3G1250 — 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.

Request Sample View Full Cross-Reference Table
Official Product Page
Browse the full Industrial / High-Pressure Centrifugal Fans range on longwellfans.com — request a quote on LWBE3G630 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.