Product Introduction
The TH48D20ZZ-220 is a high-frequency switching rectifier module from the TH series intelligent communication power supply family,
delivering a nominal 48V DC output at 20A for telecom and DC power
applications. It is built on world-leading resonant voltage-type
double-loop control conversion technology, offering high
efficiency, compact size, light weight and high reliability.
The module accepts both AC 220V (±15%) and DC 220V (-10%~30%)
inputs, making it a true dual-input power supply for sites powered by grid or DC bus. An onboard standard RS-485
communication interface allows seamless connection to automatic
monitoring systems (four-remote: remote measurement, remote
signaling, remote control, remote adjustment). With natural
cooling, hot-swappable design and three working modes (automatic,
manual, independent), it is the ideal plug-and-play power module
for program-controlled switchboards and various communication
equipment.
Product Parameters
| Parameter | Specification |
|---|
| Model | TH48D20ZZ-220 |
| Input Voltage | AC 220V ±15% / DC 220V (-10%~30%) |
| Output Voltage | DC 40~58V adjustable (nominal 48V) |
| Output Current | 20A |
| Conversion Efficiency | ≥91% |
| Voltage Regulation Accuracy | ≤±0.6% |
| Output Ripple | ≤200mV |
| Audible Noise | ≤50dB |
| Parallel Current Sharing Imbalance | ≤±3% |
| Communication Interface | RS-485 (MODBUS / TH protocol) |
| Cooling Mode | Natural cooling |
| Operating Temperature | -10℃ ~ +40℃ |
| Working Modes | Automatic / Manual / Independent |
| Hot-Swap Support | Yes |
| Dimensions (W×H×D) | 109 × 179 × 260 mm (excl. panel connectors) |
| Weight | 4.5 kg |
| Certification | CE, ISO 9001, ISO 14001 |
| HS Code | 8504401991 |
| Warranty | 1 year |
Product Advantages
1. High conversion efficiency (≥91%) — lower power loss and reduced
electricity cost over the system lifetime.
2. Dual AC/DC input flexibility — operates from AC 220V grid or DC
220V bus, ideal for hybrid-powered sites.
3. Wide output adjustment (40~58V) — supports float and boost
charging set points for different battery configurations.
4. Natural cooling, zero moving parts — silent operation, no fan
failure, minimal maintenance and longer service life.
5. Smart RS-485 monitoring (MODBUS/TH protocol) — full four-remote
integration with SCADA / site monitoring systems.
6. Parallel operation with ≤±3% current sharing — supports N+1
redundant configurations for 24/7 critical loads.
7. Hot-swappable design — modules can be replaced without shutting
down the system, maximizing uptime.
8. Compact and lightweight (4.5 kg) — easy 19-inch rack
installation and simple field replacement.
9. Comprehensive protection — input under/over-voltage, output
over-voltage, over-current and over-temperature protection.
10. CE & ISO certified — meets international safety and quality
standards, suitable for export projects.
Usage Scenarios
- Telecom base stations & exchanges — powering program-controlled
switches and BTS/NodeB equipment.
- DC power systems (DC panel) for substations, power plants and distribution rooms.
- Battery charging systems — float and boost charging for lead-acid
battery banks.
- Communication equipment rooms & IDC data centers — reliable 48V
DC bus power.
- Railway, oil & gas, and industrial automation sites requiring
rugged 48V DC power.
- Backup power and site power retrofit projects where existing 220V
DC plants need module-level upgrade.
FAQ
Q1: What is the output voltage and current of TH48D20ZZ-220?
The module delivers a nominal 48V DC output, adjustable from 40V to
58V to match different battery float/boost requirements, with a
maximum output current of 20A.
Q2: Can the module work with both AC and DC input?
Yes. It accepts AC 220V ±15% as well as DC 220V (-10%~30%), so the
same module can be used in grid-powered or DC-bus-powered sites
without modification.
Q3: Can multiple modules be connected in parallel for higher
capacity or redundancy?
Yes. Multiple TH48D20ZZ-220 modules can operate in parallel with
automatic current sharing (imbalance ≤±3%), enabling N+1 redundant
configurations for high-reliability telecom and industrial systems.
Q4: Does the module support remote monitoring and control?
Yes. It is equipped with a standard RS-485 interface supporting
MODBUS and TH protocols, providing four-remote functions (remote
measurement, signaling, control and adjustment). It also offers
three working modes: automatic, manual and independent.
Q5: What about cooling, operating environment and certifications?
The module uses natural cooling, so it runs silently with no moving
parts to maintain. Operating temperature range is -10℃ to +40℃, and
the hot-swappable design allows live replacement. It is certified
to CE, ISO 9001 and ISO 14001, with a 1-year warranty.
