The Delta ESR-48/40AC is a compact telecom rectifier module delivering -48V 40A (2000W max power), engineered for space-constrained access network sites and micro telecom shelters.
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This unit installs into Delta 1U/2U or compact embedded power subracks, converting single-phase AC into telecom-grade stabilized DC for micro station power systems.
Solves space limitation in shallow outdoor enclosures, remote maintenance difficulties, and premature shutdowns caused by unstable utility voltages.
Engineered for 4G/5G small cells, FTTH optical distribution hubs, railway signaling relay boxes, and industrial embedded power supplies.
| Key specifications | Value |
|---|---|
| Nominal DC Output Voltage | -48VDC (-42V ~ -58V) |
| Rated DC Output Current | -48VDC (-42V ~ -58V) |
| Rated Output VA / Wattage | 2000W |
| AC Input Voltage | 85V to 300V AC (Nominal 220VAC) |
| Operating Temperature Range | -40°C ~ +75°C |
| Cooling & Form Factor | Smart DC Fan / Shallow-Depth Hot-Swap |
| Overall System Efficiency | Up to 96.2% (Gold Standard) |
| Acoustic Noise | ≤ 55 dBA (at 25°C ambient load) |
| Ingress Protection Rating | IP20 (Indoor Dust & Finger Proof) |
| Dielectric Withstand Voltage | 3000VAC Input to Ground (< 5mA) |
Delta
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