Tel+86 17621197907Serving 56+ countries
RICEWIND
Delta ESR-48/56AC High-Efficiency Switch-Mode Telecom Rectifier Module (-48V 56A 3000W) - Official Front View
DeltaModel: ESR-48/56AC

Delta ESR-48/56AC High-Efficiency Switch-Mode Telecom Rectifier Module (-48V 56A 3000W)

The Delta ESR-48/56AC is a carrier-grade high-frequency switch-mode telecom rectifier module delivering nominal -48V DC, 56A maximum output current, and 3000W rated power across a wide AC input voltage range.

Talk to RICEWIND

Need to confirm a model, specification, or project configuration? Our team can follow up by email or phone.

Request a quoteWhatsApp
Tel+86 17621197907

Clear support from selection to delivery

360°Technical support
N+Service commitment
3Steps shipping
100%Customer satisfaction
Nominal DC Output Voltage
-48VDC (-42V ~ -58V)
Rated DC Output Current
-48VDC (-42V ~ -58V)
Rated Output VA / Wattage
3000W
AC Input Voltage
88V to 300V AC (Nominal 220V/230V)
Operating Temperature Range
-25°C ~ +65°C
Cooling & Form Factor
Smart Fan Forced Air / Subrack Hot-Swap

What this product is

What this product is

This module slots into Delta telecom DC power subracks, converting incoming single-phase utility or generator AC power into low-ripple -48V DC power to drive base station equipment and charge backup batteries.

What problem it solves

Eliminates low power conversion efficiency, high input harmonic distortion, and nuisance tripping during utility voltage sags, ensuring high power factor and grid tolerance.

Who and where it is for

Engineered for wireless macro cell sites, microwave transmission hubs, core switching offices, and industrial power distribution systems utilizing Delta subracks.

Core advantages

  • High-Efficiency Power Conversion: Typical efficiency exceeds 92%, substantially reducing site utility costs and cooling requirements.
  • Ultra-Wide AC Input Range: Operates reliably across 88V to 300V AC, withstanding severe grid voltage drops in remote regions.
  • Hitless Hot-Plug Maintenance: Supports live insertion and removal without interrupting continuous -48V DC bus power delivery.
  • Active Digital Current Sharing: Autonomous load sharing across multiple parallel modules ensures uninterrupted N+1 redundancy.

Technical specifications

Key specificationsValue
Rated DC Output Current-48VDC (-42V ~ -58V)
Rated Output VA / Wattage3000W
AC Input Voltage88V to 300V AC (Nominal 220V/230V)
Operating Temperature Range-25°C ~ +65°C
Cooling & Form FactorSmart Fan Forced Air / Subrack Hot-Swap
Nominal DC Output Voltage-48VDC (-42V ~ -58V)
Overall System EfficiencyUp to 96.2% (Gold Standard)
Acoustic Noise≤ 55 dBA (at 25°C ambient load)
Ingress Protection RatingIP20 (Indoor Dust & Finger Proof)
Dielectric Withstand Voltage3000VAC Input to Ground (< 5mA)

Applications

01

Telecom 4G/5G macro cellular base stations and distributed remote power sites

02

Enterprise-grade cloud data center mission-critical -48V DC power distribution lineups

03

Utility power grid dispatch centers and high-voltage substation DC switchgear rooms

04

Railway transit signaling, automated train control, and communications equipment rooms

Frequently asked questions

Continue exploring

Delta

Products