The Zhongheng ZHR481800M is a compact, high-power-density telecom switch-mode rectifier module delivering a nominal output of 53.5V DC (adjustable from 42V to 58V DC) with a maximum rated output current of 33.6A and a continuous power capacity of 1800W.
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Architecturally, the ZHR481800M utilizes a two-stage power conversion topology. The front end incorporates a wide-range active PFC boost pre-regulator (PF ≥ 0.99, THD < 5%), driving an isolated high-frequency DC-DC resonant LLC converter stage that delivers precision-regulated -48V/53.5V power to the DC busbar. Built-in digital control supervisory logic handles closed-loop regulation, CAN/RS485 bus telemetry, and autonomous hardware protection protocols compliant with IEC/EN 60950 and IEC 62368 safety standards.
This module mitigates common field power vulnerabilities, including severe utility voltage sags, phase spikes, and high-voltage grid fluctuations up to 300V AC. Its bumpless hot-swappable architecture prevents system downtime during capacity expansion or maintenance, while precision active load sharing eliminates circulating currents among parallel units and extends battery lifespan by suppressing output ripple voltage.
Ideal for 4G/5G wireless macro and small cell base stations, outdoor telecommunications enclosures, optical transport/FTTx nodes, micro edge data center racks, and industrial 48V DC UPS configurations paired with VRLA or lithium-ion backup batteries.
| Key specifications | Value |
|---|---|
| Rated Output Voltage | -48VDC (-42V ~ -58V) |
| Maximum Output Current | 33.6A |
| Rated Output Power | 1800W |
| AC Input Voltage | 85V AC ~ 300V AC |
| Maximum Efficiency | ≥ 94.0% |
| Operating Temperature Range | -40°C ~ +75°C |
| Cooling System | Forced Air Cooling with Intelligent Speed Fan |
| Hot-Swappable Support | Yes (Live Hot-Pluggable / Plug-and-Play without Power Interruption) |
Zhongheng
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