Bel Power LXN1604-6 | 48V DC Front-End Power Supply

Description

Product Introduction

Here’s a trap that burns buyers weekly: LXN and LWN cassettes look nearly identical in a shelf photo, and they are not the same rectifier. The LXN1604-6 is a 1.6kW-class member of the Melcher lineage now sold under Bel Power, feeding 48V DC distribution in telecom huts and industrial cabinets. Order the full model string — the LXN family has enough near-twins to guarantee a wrong shipment.

Against the LWN1902-6, this cassette trades about 300W of output for a smaller thermal envelope, which matters in huts where cabinet airflow is marginal to begin with. Efficiency sits around 90% at nominal load per Bel’s curve; real numbers shift with input voltage and ambient temperature, so read the datasheet at your operating point rather than the headline (variants exist — verify the label).

Key Technical Specifications

Compatible Replacement Models

• ✅ Drop-in Replacement: Same LXN1604-6 model — cassette swap, no rewiring. Set output trim to match plant float voltage before energizing.
• ⚠️ Software Compatible: Other LXN-series cassettes — same shelf form factor in most cases, but output trim, alarm pinout, and controller handshake may need reconfiguration. Budget 1–2 hours with a DC power tech.
• ❌ Hardware Incompatible: LWN-series cassettes (including LWN1902-6) and Flatpack rectifiers — different shelf/connector configuration in many builds. Do not assume the LWN shelf accepts an LXN module; confirm against your shelf manual.

Frequently Asked Questions

Is the LXN1604-6 a direct replacement for an LWN1902-6?
Not automatically. LXN and LWN cassettes share a family look, but shelf compatibility, connector pinout, and alarm signaling differ across builds. Check your shelf manual or ask Bel Power support before you buy — guessing here means a return and a stalled plant.

Can I hot-swap this rectifier?
Only if the shelf is rated for live insertion and the plant runs N+1. Melcher-era shelves vary. When in doubt, isolate the shelf first.

How do I verify the unit works before it ships?
Ask for the test record: AC input sweep, full-load burn-in past 24 hours, output ripple measurement, alarm signaling check, insulation resistance above 10MΩ. QC Passed tag and proper foam or anti-static packing.

Is this the same as a Melcher-branded LXN1604-6?
Electrically, yes — Bel Power absorbed the Melcher line and carried the model string forward. Label branding varies by production date. Request a label photo before committing.

What float voltage should I set?
Match the battery manufacturer’s data — typically 53.5V for 48V telecom strings. A wrong trim setting ages batteries quietly; you find out a year later during a capacity test.

What warranty is reasonable?
A tested-functional guarantee with a defined window: 30 days standard, 90 on some refurbished lots. Rough fan noise or output trim drift on arrival? Flag it before installation.

Any installation traps?
Two. Airflow direction — front-to-back cassettes in a side-exhaust cabinet trip on thermal shutdown. And leave headroom on DC distribution; running at 100% rated load shortens capacitor life noticeably.