Tianjin Estel Electronic Science and Technology Co.,Ltd
TIANJIN ESTEL ELECTRONIC SCIENCE AND TECHNOLOGY CO.,LTD (ESTEL(GUANGDONG) TECHNOLOGY CO., LTD) We are the professoinal supplier of outdoor telecom cabinet, air conditioner, heat exchanger, and telecom
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Product Overview
MR483000HG2B-GS is a power supply device that converts standard AC voltage into stable 48Vdc for communication power supply systems.
For a larger load capacity, the rectifier modules can be connected in parallel, or an additional independent monitoring module can be used for intelligent control.
The rectifier module is a plug-in modular unit designed to be compatible with racks and cabinets.
| Item | Configuration |
|---|---|
| Operating temperature | –10℃ ~ +75℃ |
| Note: Normal operation at –10℃ ~ 55℃; | |
| Power derated to 80% from 55℃ to 65℃, and to 40% from 65℃ to 75℃. | |
| Startup at –40℃ possible after input is powered on. | |
| Storage temperature | –40℃ ~ +75℃ |
| Relative humidity | 5% ~ 95% (no condensation) |
| Altitude | ≤4000m (derated 1℃ per 200m above 3000m) |
Input parameters
Operating Voltage: 85Vac to 290Vac
Frequency: 45Hz ~ 66Hz (Rated: 50/60Hz)
Input current: ≤18A
Power factor: ≥0.99 (at 220Vac, 20%~100% load)
THD: ≤5% (at 50%~100% load)
Output parameters
Output voltage: 42VDC ~ 58VDC (Rated: 53.5VDC)
Linear power derating:
3000W from 176VAC to 290VAC
Derates to 1250W from 175VAC to 85VAC
Voltage regulation: ≤±0.6%Vo
Ripple and noise: ≤200mVp-p (≤20MHz bandwidth)
Standby power: ≤4W
Startup time: 3s ~ 8s
Hold-up time: >10ms
Phone noise: ≤2mV
Wideband noise voltage:
≤50mV (3.4kHz ~ 150kHz)
≤20mV (0.15MHz ~ 30MHz)
Dimensions: 41.5mm (H) × 106.4mm (W) × 291mm (D)
Weight: <2kg
Cooling: Forced air cooling with built-in fan (linear speed control)
Graphs and curves included in original manual (Output current, Input voltage derating, Temperature derating, Efficiency curve)
Protection features
Input over-voltage:
290~300Vac → warning light, output normal
300Vac → output off
Under-voltage:
<80±5Vac → output off
80~90Vac → auto recovery
Output over-voltage:
Internal: 58.5VDC–60.5VDC, lockout, recover by repowering
External: >63VDC for >500ms, lockout
Current limiting: See output curve
Short-circuit: Long-time tolerance, auto-recovery
Over-temperature: Protected
Certifications: CE, UL, CB
UL/EN/IEC 62368-1
EMC: EN 55032 Class B, EN 55035, IEC 61000-3-2/3
Lightning protection: 5kA (8/20μs)
MTBF: >500,000 hours @ 25℃
Noise: ≤55dB(A) @ 40℃
Gold finger pin layout
| Pin | Function |
|---|---|
| 1, 2 | Output 48V– |
| 3, 4 | Pre-charge |
| 5, 6 | Output 48V+ |
| 7 | Group address |
| 8 | Inner address |
| 13 | CANL |
| 14 | CANH |
| 31, 32 | Protection ground |
| 33, 34 | AC Neutral |
| 35, 36 | AC Phase |
Indicators on the front panel:
Power (Green)
On: Normal
Off: No input / input abnormal
4Hz flash: Manual query status
Alarm (Yellow)
Off: No alarm
On: Current limit
0.5Hz flash: Comm loss
4Hz flash: Address error
Fault (Red)
On: No output / internal fault
Over-voltage lock: Unplug for 1 minute to reset
