DC 9V–120V to 5V/12V 3A Step-Down Buck Converter Module
DC 9V–120V to 5V/12V 3A Step-Down Buck Converter Module
DC 9V–120V to 5V / 12V 3A Step-Down Buck Converter Module
Tackle any wide-voltage DC power project with confidence. This compact step-down (buck) converter module accepts a wide input range of 9V to 120V DC and delivers a stable, regulated output of either 5V or 12V at up to 3A — all in a palm-sized 40×30×19mm package. Ideal for electronics hobbyists, engineers, DIY builds, robotics, solar systems, electric bikes, and industrial automation projects.
Made in Mainland China.
Key Features
- Ultra-Wide Input Range: Accepts DC 9V–120V (covers 9V, 12V, 24V, 36V, 48V, 72V, 84V, 120V sources)
- Dual Output Options: Choose 5V 3A or 12V 3A output to suit your application
- High Efficiency: Up to 95% conversion efficiency — less heat, more power delivered
- Constant Voltage & Constant Current Output: Stable, reliable power for sensitive electronics
- Built-In Protections: Over-temperature, over-current, and short-circuit protection keep your devices safe
- Built-In Soft Start: Prevents inrush current spikes on startup
- Low Standby Current: Energy-efficient even when lightly loaded
- Adaptive Frequency: Reduces switching frequency under light load to maximise light-load efficiency
- Compact Size: 40 × 30 × 19 mm — fits easily into enclosures and project boxes
Specifications
| Input Voltage | DC 9V – 120V |
| Output Voltage | 5V or 12V (select variant) |
| Maximum Output Current | 3A |
| Maximum Recommended Power | 30W |
| Minimum Input–Output Differential | 4V (5V output) / 4V (12V output, min. input 16V) |
| Switching Frequency | Typical 140 kHz |
| Efficiency | Up to 95% |
| Module Dimensions | 40 × 30 × 19 mm |
| Materials | Plastic + Metal |
| Package Contents | 1 × Step-Down Converter Module |
Important Notes
- For a 5V output: ensure input is between DC 9V–120V (minimum 4V above output).
- For a 12V output: ensure input is between DC 16V–120V.
- When using output voltages greater than 12V (custom), current will be lower than 3A; keep total power under 30W.
- Slight colour variation from product images may occur due to monitor and lighting differences.
- Allow ±1–2mm measurement tolerance for stated dimensions.
Related Products You May Like
- 25-in-1 Precision Magnetic Screwdriver Set | Pro Repair Kit
- 10-Pack Waterproof Cable Glands PG7 PG9 Nylon Connectors
- 34-Compartment Double-Sided Hardware Storage Box & Dividers
Learn more: OSHA on personal protective equipment
Frequently Asked Questions
Q: What input voltage range does this step-down buck converter module support?
A: This DC-DC step-down converter module supports a wide input voltage range of DC 9V to 120V, making it compatible with a huge variety of power sources including 12V, 24V, 36V, 48V, 72V, 84V, and 120V DC systems.
Q: Can I use this module for both 5V and 12V output?
A: The module is available in two output variants — 5V 3A and 12V 3A. Select the variant that matches your required output voltage when ordering. For the 12V output version, a minimum input of 16V DC is required to maintain the 4V differential.
Q: What protection features are built into this converter?
A: The module includes built-in over-temperature, over-current, and short-circuit protection, as well as a soft-start function to prevent startup current surges. These features help safeguard both the module and any connected devices.
Q: What is the maximum recommended power output for this module?
A: The maximum continuous output current is 3A. It is recommended to keep total power under 30W for reliable, long-term operation, especially at higher output voltages.