The Heda EPW30-48 is an industrial carrier-grade switch-mode power rectifier module engineered for telecom central offices and cellular base station DC power plants, delivering a nominal -48V DC output (adjustable from 42V to 58V DC) with a maximum load current of 30A and a rated continuous power output of 1600W.
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The EPW30-48 employs a high-frequency pulse-width modulated (PWM) dual-stage topology combining active power factor correction (APFC) with an isolated DC-DC resonant converter to deliver low-ripple telecom-quality -48V DC power. It integrates hardware-driven AC under/over-voltage shutdown, output over-voltage crowbar latching, output current limiting, thermal foldback, and localized telemetry interfaces compliant with global telecom and EMC standards.
Eliminates premature component burnout and brownout shutdowns in remote or unstable grid regions prone to severe voltage sags and transient surges; mitigates thermal runaway and current hogging in parallel redundant arrays; and eliminates downtime during maintenance via live hot-plug capability.
Cellular base stations (BBU/RRU/macro sites), optical access network nodes (FTTx/OLT), microwave repeater terminals, utility substation automation SCADA racks, and industrial 48V DC uninterruptible power supply (UPS) enclosures.
| Key specifications | Value |
|---|---|
| Rated Output Voltage | -48VDC (-42V ~ -58V) |
| Maximum Output Current | 30A |
| Rated Output Power | 1600W |
| AC Input Voltage | 90V AC ~ 290V AC |
| Maximum Efficiency | ≥ 92.0% |
| 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) |
Heda
Featuring a peak energy conversion efficiency exceeding 92.5%, the unit accepts an ultra-wide AC input range from 90V to 290V AC, incorporating active power factor correction, precision autonomous current sharing, and true hot-plug capability. It is specifically designed for space-constrained micro-stations and harsh field grid environments.
Featuring an ultra-wide operating range (-20°C to +65°C), the EPMU03 integrates a multilingual LCD screen with physical navigation keys, a high-performance digital control engine, and native Modbus/Heda protocol support. Its hot-swappable architecture ensures zero-downtime maintenance across critical network infrastructure.
Engineered for harsh operating environments, the 4850C achieves peak conversion efficiency greater than 92.5% and a power factor of 0.99 via advanced Active Power Factor Correction (APFC) and resonant topologies. It features forced-air cooling driven by an intelligent variable-speed brushless fan, seamless live hot-swappability, autonomous active current-sharing across parallel units, and robust protection against input line disturbances, voltage surges, and output anomalies.
Achieving a peak efficiency exceeding 94.5%, the 4850N2 combines full digital control topology with an intelligent speed-regulated brushless DC cooling fan for superior power density. Designed for rugged electrical environments, it features active power factor correction (PFC), comprehensive CAN bus communication, and true live hot-plug capability, guaranteeing carrier-grade reliability and exceptionally high MTBF.
