DFB2560 Antminer Bitmain APW12 PSU Bridge Rectifier

DFB2560 Bridge Rectifier | 600V / 25A Glass-Passivation Replacement for Bitmain APW12 PSU Repair

The DFB2560 is a 600V / 25A bridge rectifier with glass passivation junction and 2500VRMS case dielectric strength — the AC-to-DC rectifier used on the Bitmain Antminer APW12 power supply input stage. Sits between the AC line filter and the bulk capacitor, converting full-wave AC to pulsing DC for the primary switching stage. A 350A peak surge overload rating protects against sudden power surges.

When the bridge rectifier fails, the APW12 typically presents as completely dead with a blown input fuse. The DFB2560 is a common failure point after lightning strikes, brownouts, or extended operation past nameplate spec. Replacement restores the PSU's first DC stage — pair with input fuse and surge protection inspection for a complete repair.

When to Replace the DFB2560

• PSU dead with blown input fuse — shorted bridge rectifier took out the fuse on power-up.
• Visible cracking or charring on the rectifier body — heat-stress damage.
• Burn marks on the PCB around the rectifier footprint after a fault event.
• Open-circuit reading on one or more diode junctions — partial failure mode.
• Preventive replacement on APW12 units returning from sites with poor mains quality.

DFB2560 Bridge Rectifier Specifications

FAQ — DFB2560 Bridge Rectifier

Q: How do I confirm the bridge rectifier is the failed part?
A: Power off, isolated from mains. Use DMM diode-test mode across each pair of terminals — healthy bridge shows the four internal diodes in their expected orientations. Shorted reads 0Ω across a junction that should read OL. Open reads OL where 0.5V forward drop should be present.

Q: Can I substitute a higher-current bridge rectifier?
A: Higher-current bridges with the same voltage rating generally work, but the package size differs — physical fit matters. Match the DFB2560 exactly for drop-in PCB compatibility. Don't substitute lower-current devices — they won't survive APW12 inrush current.

Q: Always replace the input fuse at the same time?
A: Yes. The fuse usually blew because the bridge shorted. New bridge with old fuse = no protection if the bridge fails again. New bridge with new fuse = restored protection.

Q: Bulk pricing for APW12 repair benches?
A: Yes — email contact@lys-sz.com for volume pricing on DFB2560 plus matched input fuses for APW12 repair kits.

Related products

• APW12 Power Supply (Antminer L7 / S19j)
• TVR 14511 Varistor (Bitmain APW12)
• GBU3510 35A 1000V Bridge Rectifier (Whatsminer PSU)
• Antminer APW12 PSU Test Fixture

APW12 PSU repair benches stocking DFB2560 bridge rectifiers by the strip? Email contact@lys-sz.com for bulk pricing. Worldwide shipping from our Shenzhen warehouse.