HF115F 012 JQX-115F Miniature High Power DC Relay for Power Supply Unit repair
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HF115F-012 12V 16A High-Power DC Relay for ASIC Miner PSU Repair
The HF115F-012 (also marked JQX-115F) is a miniature high-power DC relay with a 12V nominal coil voltage and a 16A contact switching capacity. It is designed for printed-circuit-board mounting and is widely used inside switch-mode power supplies to handle inrush current, soft-start, output enable and protective disconnect functions — including on the AC input or DC output side of ASIC miner power supplies.
With AgSnO2 contact material, F-class insulation, reinforced VDE0700/0631 insulation requirements and IEC60335-1 compliance, the HF115F-012 is built for repeated industrial switching cycles under sustained load.
Specifications
| Parameter | Value |
|---|---|
| Part number | HF115F-012 / JQX-115F |
| Condition | New |
| Coil voltage | 12V DC |
| Contact switching capacity | 16A |
| Contact material | AgSnO2 |
| Insulation class | F-class |
| Insulation standard | VDE0700/0631 reinforced |
| Safety standard | IEC60335-1 |
| Mounting type | PCB through-hole |
| Soldering | Reflow-soldering compatible |
| Compliance | RoHS |
Where the HF115F-012 fits in an ASIC PSU
Power-supply designers use 16A class PCB relays for two main jobs inside high-power SMPS: bypassing the inrush-limiting NTC after the bulk capacitor charges (soft-start), and gating the output rail on/off in response to the supervisor IC. Both roles see steady high current, which is why a worn or burnt HF115F is a common reason a PSU starts and then collapses moments later.
Compatibility
Use as a direct replacement for HF115F-012 / JQX-115F sockets on PSU control boards. Verify pinout, footprint and coil voltage against the original part marking — the HF115F family includes coil-voltage variants (5V, 12V, 24V) that share the housing but are not interchangeable electrically.
Common failure symptoms
- Audible click on start-up but PSU output never comes up to full voltage
- NTC inrush resistor running red-hot because the bypass relay no longer closes
- Burn marks or melted housing around the relay body
- Welded or pitted contacts measured as permanently low resistance
- Coil reading open circuit between the two coil terminals
Frequently asked questions
What does the "012" suffix mean?
"012" indicates the nominal 12V DC coil. Other coil variants in the HF115F series include 005 (5V), 024 (24V) and 048 (48V); they share the housing but are not interchangeable electrically.
Is the contact arrangement SPST or SPDT?
The HF115F is available in multiple contact forms. Check the original part marking and the schematic before fitting — variants include 1 Form A and 1 Form C.
Can I reflow-solder this relay?
Yes, the package is rated for reflow profiles. For hand-rework, use a temperature-controlled iron and avoid prolonged heat on the coil pins.
Do you stock other coil voltages?
Yes, contact us if you need 5V, 24V or 48V variants in the same HF115F housing.
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