Nicotra Gebhardt RDP 355 Alternative — LONGWELL LWBE3G355
Looking for an alternative for Nicotra Gebhardt RDP 355? 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 10–14 weeks ex-works Nicotra Gebhardt. Widely deployed across Cleanroom FFU, AHRI-cert AHU, pharma cleanroom.
LWBE3G355
Specification Comparison
| Specification | Nicotra Gebhardt RDP 355 | LONGWELL LWBE3G355 |
|---|---|---|
| Fan type | EC plug fan | EC 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) | 10–14 weeks | 15–30 days |
| Landed cost index (LONGWELL = 100) | 175–200 | 100 (baseline) |
Matched to Nicotra Gebhardt RDP 355 by impeller size and fan type. Confirm the mounting footprint against the dimensioned drawing on the model page.
Why Engineers Switch from RDP 355 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 Nicotra Gebhardt RDP 355 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 Nicotra Gebhardt RDP 355. LONGWELL supplies its Modbus RTU register map with the fan so the BMS points can be re-mapped; the register addresses are not identical to the Nicotra Gebhardt map.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 Cleanroom FFU, AHRI-cert AHU, pharma cleanroom. Common application categories include:
- Cleanroom FFU
- AHRI-certified AHU
- Pharma cleanroom
Particularly suited for cleanroom FFU and AHRI-certified AHU OEM specifications.
FAQ
Is LONGWELL LWBE3G355 a true drop-in replacement for Nicotra Gebhardt RDP 355?
How does LWBE3G355 compare on efficiency to RDP 355?
What's the 2026 lead time difference?
What's the cost delta?
What applications is LWBE3G355 typically used for?
Replace your RDP 355 — 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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