- Stock: 28
- Model: PSU-12v10a120w
Model:
12V 5A 60W
12V 10A 120W
12V 15A 180W
12V 20A 250W Fan
12V 33A 400W
12V 40A - 500W
24V 10A 240W
24V 15A 360W
24V 20A 500W
24V 25A 600W
24V 33A 800W
36V 10A 360W
48V 10A 500W
A compact 12 V, 10 A, 120 W AC/DC switching power supply for electronics, LED lighting, motors, CNC systems and 12 V 3D-printing equipment. Its perforated metal enclosure provides passive cooling and makes it suitable for integration into machine frames and electrical enclosures.
It can power a 3D printer without a heated bed, a printer whose bed has a separate supply, or any machine whose combined load remains within the 10 A nominal limit. Include the controller, motors, heaters, fans, lighting and accessories when calculating the total.
Technical specifications
| Feature | Value |
|---|---|
| Type | Single-output AC/DC switching power supply |
| Selectable input | 100-120 V AC, 60 Hz / 200-240 V AC, 50 Hz |
| Nominal output | 12 V DC |
| Maximum nominal current | 10 A |
| Nominal power | 120 W |
| Cooling | Passive cooling through a perforated metal enclosure |
| Output adjustment | Fine adjustment through V ADJ |
| Connections | Terminals for L, N, earth, V- and V+ |
| Contents | 1 power supply |
Integrated protection
- Short-circuit protection.
- Overload protection.
- Overvoltage protection.
- Overtemperature protection.
- EMI filtering to reduce electromagnetic interference.
- Full-load operation test.
Calculating the load
Current in a 12 V system can be estimated with current = power / 12:
| Total load | Approximate current at 12 V |
|---|---|
| 60 W | 5 A |
| 84 W | 7 A |
| 96 W | 8 A |
| 120 W | 10 A nominal maximum |
Allow headroom for start-up peaks, ambient temperature and later expansion. If more current is required, see the compact 12 V, 20 A, 250 W fan-cooled power supply.
Mains and 12 V connections
- Input selector: set it to 220/230 V before use on a 230 V, 50 Hz supply. An incorrect setting may damage the power supply and connected equipment.
- AC input: connect live to
L, neutral toNand protective earth to the earth-marked terminal. The metal enclosure must be properly earthed. - DC output: connect positive to
V+and negative toV-.V-is not protective earth. - Verification: measure output voltage and polarity with a multimeter before connecting electronics.
V ADJ provides fine adjustment around 12 V and must not be used to convert the unit to a different nominal voltage. Every connected device must be designed for 12 V or explicitly accept it.
Safe machine integration
- Install in a dry, ventilated location protected from metal objects, conductive dust and swarf.
- Keep every cooling opening clear and provide free space around the enclosure.
- Fit a suitable switch, input overcurrent protection, strain relief and properly terminated wiring.
- As a guide for short internal machine runs, 1.5 mm² output cable provides a conservative starting point for up to 10 A; final sizing must consider length, voltage drop, temperature, bundling and local rules.
- Do not connect multiple supplies in series or parallel unless the specific installation documentation permits it.
A detachable input can be built with an IEC inlet and switch and a Schuko to IEC C13 mains lead, together with suitable protection and wiring.
Firmware
The power supply has no dedicated Marlin, Klipper or RepRapFirmware setting. Keep hotend and heated-bed thermal protection enabled. Repeat PID calibration only if the change in power delivery produces a meaningful change in heater response.
