LTV-817C Optocoupler Isolator – 5KV Isolation for Bitmain APW8 APW9 APW17 PSU

LTV-817C Optocoupler Isolator | 5KV Isolation for Bitmain APW8 APW9 APW17 PSU

The LTV-817C is a single-channel DC optocoupler isolator that ships in a 4-DIP package with 5000Vrms isolation voltage — the standard part for primary-to-secondary feedback isolation in Bitmain Antminer APW8, APW9, and APW17 power supplies. When this optocoupler degrades, the PSU loses its tight regulation loop, leading to under-voltage shutdowns, intermittent failures, or full PSU loss. Replacing the LTV-817C is a low-cost, high-impact repair that restores stable feedback and brings the PSU back to spec.

With a current transfer ratio of 200%-400% at 5mA forward current and a Vce(sat) below 200mV, the LTV-817C delivers reliable signal transfer for uninterrupted mining operation. Its compact 4-DIP footprint matches the original Bitmain layout exactly, so installation is a clean drop-in.

Durable 4-DIP Optocoupler with 5000V Isolation & 50mA Output for Antminer Repairs

• 5KV isolation — safeguards primary-side circuitry against high-voltage spikes for longer PSU lifespan.
• High CTR (200%-400%) — delivers reliable, stable signal transfer for uninterrupted mining.
• Wide compatibility — ships as a direct replacement across APW8, APW9, and APW17 power supplies.
• Compact 4-DIP design — quick swap on the original Bitmain footprint, no PCB rework required.
• 50mA output current — handles the regulation-loop drive needs of standard ASIC PSU designs.

Antminer APW PSU Repair Workflow

Failure typically presents as a PSU that boots but cannot hold steady output, fan ramping under no load, or cyclic shutdown. After de-powering and discharging the bulk capacitors, locate the LTV-817C between the regulation/feedback section and the controller. Desolder the four pins, place the new device with pin-1 alignment matching the silk-screen, reflow, and bench-test the PSU through a variac with progressive load to confirm the regulation loop has been restored.

LTV-817C Optocoupler Isolator Specifications

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Repair benches ordering LTV-817C optocouplers in tray quantities can email contact@lys-sz.com for bulk pricing and matched APW PSU kits. Worldwide shipping from our Shenzhen warehouse.