MFJ 25amp Switching Power Supply MFJ-4125 13.8v (Pre-Owned)
MFJ-4125 25-Amp Switching Power Supply — 13.8V DC (Pre-Owned)
The MFJ-4125 is a compact, regulated 13.8V DC switching power supply rated at 25 amps continuous. A go-to bench supply for powering CB radios, 10-meter transceivers, amateur HF/VHF rigs, and other 12V DC equipment, it delivers clean, stable voltage without the bulk and weight of a traditional linear supply.
Specifications
- Output Voltage: 13.8V DC regulated
- Continuous Current: 25A
- Peak Current: 30A
- Input: 110V AC
- Type: Switching (SMPS)
- Manufacturer: MFJ Enterprises
- Model: MFJ-4125
Key Features
- Regulated 13.8V output — stable voltage under varying load conditions
- 25A continuous / 30A peak — sufficient headroom for high-draw transceivers and accessories
- Switching design — runs cool and quiet compared to linear supplies of equivalent output
- Built-in protection — over-voltage, over-current, and thermal protection circuits
- Front-panel meters — analog voltage and current meters for at-a-glance monitoring
- Binding post outputs — heavy-duty terminals for secure cable connections
Pre-Owned Condition
This unit is sold as-is, pre-owned. It has been inspected and confirmed to power on and function. Cosmetic wear consistent with prior use may be present. No manufacturer warranty applies. TekShack does not offer a return or warranty on pre-owned power supplies unless otherwise noted in the product notes field above.
If you have questions about the specific condition of this unit, contact us before purchasing.
What's Included
- 1× MFJ-4125 switching power supply
- Power cord (if present at time of listing — verify in product notes)
All other accessories, radios, and cables shown are for illustrative purposes only and are not included.