Q: Which subrack platforms support the SMPS1002H-I, and what are its parallel expansion and active current-sharing capabilities?

With standard dimensions of 132×85×280 mm, the SMPS1002H-I seamlessly fits Zhujiang 19-inch and 21-inch telecom subracks with full hot-swap capability. It supports multi-module parallel N+1 redundancy, featuring an autonomous active current-sharing bus that limits current imbalance to <±5% across load profiles. Backward compatible with legacy Zhujiang monitoring systems, the unit incorporates hardware-level output overvoltage latch-off, short-circuit foldback current limiting, and output reverse-polarity isolation, ensuring zero downtime switchover if a single unit faults.

Q: What environmental tolerances, cooling mechanisms, and surge suppression designs are built into the Zhujiang SMPS1002H-I?

The SMPS1002H-I is built for harsh telecom edge and CO environments, rated for operational temperatures from -25°C to +65°C (with smart derating above +55°C) and storage from -40°C to +70°C at 5%~95% RH (non-condensing). Thermal management relies on an internal temperature-controlled variable-speed DC fan to optimize airflow, dust resistance, and acoustic performance. The AC port features telecom-grade surge protection conforming to 2kV differential mode and 4kV common mode (8/20μs lightning surge waveform), yielding an MTBF rating of ≥320,000 hours.

Question 1

What are the core electrical conversion specifications and input/output parameters of the Zhujiang SMPS1002H-I rectifier module?

Accepted Answer

The Zhujiang SMPS1002H-I (SKU: ZJ-REC-SMPS1002H-I) is engineered for telecom DC applications, delivering a rated output of -48VDC/20A (1000W) with an adjustable voltage window from -40V to -60VDC. Featuring an advanced topology with Active Power Factor Correction (APFC), it achieves a power factor of ≥0.99 and a peak conversion efficiency >92.5%. The unit operates across a wide single-phase AC input range of 90VAC to 290VAC (with linear derating under low input voltages) and maintains input current THD <5%, minimizing harmonic feedback to grid or backup generator sources.

Question 2

Which subrack platforms support the SMPS1002H-I, and what are its parallel expansion and active current-sharing capabilities?

Accepted Answer

With standard dimensions of 132×85×280 mm, the SMPS1002H-I seamlessly fits Zhujiang 19-inch and 21-inch telecom subracks with full hot-swap capability. It supports multi-module parallel N+1 redundancy, featuring an autonomous active current-sharing bus that limits current imbalance to <±5% across load profiles. Backward compatible with legacy Zhujiang monitoring systems, the unit incorporates hardware-level output overvoltage latch-off, short-circuit foldback current limiting, and output reverse-polarity isolation, ensuring zero downtime switchover if a single unit faults.

Question 3

What environmental tolerances, cooling mechanisms, and surge suppression designs are built into the Zhujiang SMPS1002H-I?

Accepted Answer

The SMPS1002H-I is built for harsh telecom edge and CO environments, rated for operational temperatures from -25°C to +65°C (with smart derating above +55°C) and storage from -40°C to +70°C at 5%~95% RH (non-condensing). Thermal management relies on an internal temperature-controlled variable-speed DC fan to optimize airflow, dust resistance, and acoustic performance. The AC port features telecom-grade surge protection conforming to 2kV differential mode and 4kV common mode (8/20μs lightning surge waveform), yielding an MTBF rating of ≥320,000 hours.

Key specifications	Value
Nominal Output Voltage	-48 VDC
Output Voltage Range	-40 ~ -60 VDC
Rated Output Power	1000 W
Physical Dimensions Spec	132 × 85 × 280 mm
Power Conversion Efficiency	> 92.5%
AC Input Voltage Range	90 ~ 290 VAC (Single Phase Wide Range)
Operating Temperature	-20°C ~ +65°C
Rated Output Current	20 A
Output Power Factor PF	> 0.99

Zhujiang SMPS1002H-I Industrial Telecom Rectifier Module (-48V 20A 1000W)

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Electric utility SCADA transmission stations

Broadband municipal access points

Railway signaling relay huts

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