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DC Power Supplies
8 Series · 147 Models
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DC Power Supplies Overview
Switching DC power supplies convert AC mains into regulated DC output using high-frequency conversion for high efficiency and compact size. QDTB supplies range from 25 W to tens of kilowatts with fixed or adjustable output (5 V/12 V/24 V/48 V and custom levels). Series include compact switching units, large adjustable models, and LDP/LDY/LDK heavy-industrial types, serving industrial automation, LED lighting, telecom, security systems, electronics, and laboratories.
Available Series
Small-Switching Series
Compact switching mode DC power supplies for low-power industrial applications, featuring high efficiency and reliable performance in a small form factor.
Large-Adjustable Series
High-capacity adjustable DC power supplies for industrial processes requiring variable voltage and current output, including electroplating and electrolysis applications.
LDP Series
The LDP series low voltage DC power supplies are designed for applications requiring stable low voltage DC output with high current capability.
LDY Series
The LDY series precision DC power supplies provide highly stable and precise DC output for laboratory and industrial measurement applications.
LDK Series
The LDK series industrial DC power supplies are ruggedized power sources for harsh industrial environments, providing reliable DC power for control systems and actuators.
GZDW DC Power Systems Series
The GZDW series microcomputer-controlled DC power systems provide the dedicated operating power supply (110V or 220V DC) required by switchgear, protection relays, and control equipment in substations and switching stations. Rated battery capacity 10–200 Ah with high-frequency switching charger modules in N+1 redundant configuration, automatic battery management, and microprocessor-based monitoring of busbar voltage, insulation, and charge/discharge state.
Integrated Distributed Power Supplies Series
Integrated distributed DC power supplies embed the DC operating supply (battery, charger and distribution) directly at each bay or switchgear panel, avoiding a central battery room. Rated 110/220V DC for substations and distribution automation, with battery backup integrated into each cabinet.
Telecom Rectifier Systems Series
Telecom rectifier systems convert AC mains to -48V DC for telecom and data communication equipment, with battery backup and N+1 rectifier redundancy. Rated 48V DC up to 1000A, with hot-swappable rectifier modules, battery management and remote monitoring for base stations and exchanges.
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| × Country factor | ×1.0000 |
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| + Options / accessories | $0 |
Complete equipment — no winding copper linkage
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Application Scenarios
Electroplating
High-current, low-voltage DC for electroplating and anodising lines.
Industrial Automation
Stable 24V DC for PLC, sensors, and control networks.
LED Lighting
Constant-voltage drivers for LED strips, signs and industrial lighting.
Telecommunications
Reliable DC for telecom, networking and transmission equipment.
Security Systems
Power for CCTV, access control and alarm systems.
Laboratory & R&D
Adjustable, regulated DC for experiments and product development.
Technical Advantages
High-Frequency Switching
Compact, efficient design with high power density.
Adjustable Output
Fixed or adjustable voltage and current to suit the application.
Wide Power Range
From 25W small units to tens of kilowatts for heavy industry.
Comprehensive Protection
Overload, over-voltage, short-circuit and thermal protection.
FAQ - DC Power Supplies
What is the difference between a switching and a linear power supply?
Should I choose fixed or adjustable output?
Can power supplies be connected in parallel?
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