ebm-papst K3G355 Alternative — LONGWELL LWBE3G355
Looking for an alternative for ebm-papst K3G355-PB47-04? The LONGWELL LWBE3G355 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 Plenum AHU, data center in-row, heat pump fan coil, L2A modules.
LWBE3G355
Specification Comparison
| Specification | ebm-papst K3G355 | LONGWELL LWBE3G355 |
|---|---|---|
| Fan type | EC backward-curved centrifugal plug fan | EC backward-curved centrifugal plug fan |
| Impeller diameter | Ø355 mm | Ø355 mm 21 models |
| Airflow range | 800–4,500 m³/h | up to 8,034 m³/h |
| Static pressure (max) | 1200 Pa | up to 2,524 Pa |
| Motor power (max) | 950 W | up to 3,100 W |
| Noise floor (Lw) | 68 dB(A) | from 68 dB(A) (nameplate, per model) |
| Voltage | 380–480 V 3Φ | 220–230 V 1Φ · 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 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) |
Why Engineers Switch from K3G355 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 K3G355 mounting pattern (M-mount, ISO 9001 plenum-fan footprint) per the mounting dimensions on the LONGWELL drawing. Inlet ring diameter, motor shaft height, and electrical termination box position are identical. 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 K3G355. 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 LWBE3G355 is widely deployed across Plenum AHU, data center in-row, heat pump fan coil, L2A modules. Common application categories include:
- Plenum AHU
- Heat pump indoor
- L2A liquid cooling
- In-row data center cooler
Particularly suited for L2A liquid-to-air data center modules, in-row coolers, and 30–50 kW/rack RDHx.
FAQ
Is LONGWELL LWBE3G355 a true drop-in replacement for ebm-papst K3G355?
How does LWBE3G355 compare on efficiency to K3G355?
What's the 2026 lead time difference?
What's the cost delta?
What applications is LWBE3G355 typically used for?
Replace your K3G355 — 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