MF72-10D15 NTC Thermistor for Bitmain APW3+ Power Supply
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MF72-10D15 NTC Thermistor | Inrush Current Limiter for Bitmain APW3+ Power Supply
The MF72-10D15 NTC thermistor (10Ω cold resistance, 15mm disc) is a negative-temperature-coefficient inrush current limiter used on the AC input stage of the Bitmain APW3+ power supply. At power-on, the cold 10Ω resistance limits the surge current into the bulk capacitors; the thermistor then self-heats and drops to near-zero resistance for normal operation.
Wide operating temperature range -55°C to +200°C, fast-response architecture, high power handling for sustained inrush-limiting duty. The same part also fits inverters, energy-saving lamp ballasts, filament protection circuits, and some heater applications.
When to Replace the MF72-10D15
- APW3+ PSU won't start — open NTC thermistor blocks the inrush path completely.
- AC-input fuse blows on power-up — shorted NTC removes inrush protection, surge fries the fuse and possibly the bridge rectifier.
- Visible damage — cracked or burnt disc body.
- Multimeter resistance check shows OL (open) or near 0Ω cold — both indicate failure.
MF72-10D15 Specifications
| Feature | Specification |
|---|---|
| Type | NTC (Negative Temperature Coefficient) Thermistor |
| Cold Resistance | 10Ω |
| Disc Size | 15mm |
| Operating Temperature Range | -55°C to +200°C |
| Power Handling | High (sized for sustained inrush duty) |
| Response Time | Fast |
| Form Factor | Through-hole disc |
| Application | Bitmain APW3+ PSU inrush current limiter |
FAQ — MF72-10D15 NTC Thermistor
Q: How do I test the NTC?
A: Power off and discharge PSU caps. Measure resistance across the NTC at room temperature: healthy = ~10Ω ±20%. Open (OL) = failed open; near 0Ω = failed short. Visible burn marks or cracking = replace regardless of resistance reading.
Q: Higher / lower resistance variants — do they matter?
A: Yes. Higher cold resistance = more inrush limiting but more power dissipation in steady-state. Lower = less inrush protection. Match the original part's value (10Ω for MF72-10D15) — substituting changes the PSU's inrush profile and can stress bulk caps or the bridge rectifier.
Q: Rework procedure?
A: Through-hole replacement — desolder both leads, install fresh NTC (non-polarized, so either orientation works), trim leads. Be aware: the NTC carries full AC line current, so handle the de-energized PSU board carefully even after discharge.
Q: Bulk pricing?
A: Yes — email contact@lys-sz.com for tray-quantity pricing.
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APW3+ repair benches stocking MF72-10D15 NTCs in volume? Email contact@lys-sz.com for bulk pricing. Worldwide shipping from our Shenzhen warehouse.
Buying in bulk for a mining farm or repair shop?
Get dedicated B2B pricing on this part and across our full catalog — quote response within 24 hours, payment by T/T USD bank wire, and DDP delivery available for US & EU customers (and other lanes on request).
