SBL3040CT Schottky Barrier Rectifier for Bitmain APW9 APW9+ PSU
Couldn't load pickup availability
Have questions about this product? Our team is here to help — just reach out on WhatsApp.
💬 Contact Us on WhatsAppAbout the Product
SBL3040CT Schottky Barrier Rectifier | 30A / 40V Replacement Diode for Bitmain APW9 / APW9+ PSU Repair
The SBL3040CT is a 30A / 40V Schottky barrier rectifier in TO-220AB package, sized for the output stage of the Bitmain APW9 and APW9+ power supplies. Drop-in replacement when the original rectifier fails — high-efficiency majority-carrier conduction, low forward voltage drop, and high surge capability keep the PSU output stage running cleanly through the daily voltage swings of mining duty.
Built around a silicon Schottky junction with integrated guard ring for transient protection — the guard ring absorbs the voltage spikes and transient events that would otherwise damage an unprotected junction over time. 40V to 45V reverse voltage envelope with 30A continuous forward current, TO-220AB molded plastic package, and UL94 V-0 flammability rating. Direct replacement for the original part Bitmain specs on APW9 / APW9+ production units.
When to Replace the SBL3040CT
- APW9 / APW9+ output rail dead or out of spec — rectifier failed open or short, primary controller can't drive the output cleanly.
- Visible burn or discoloration on the SBL3040CT package — thermal or surge damage, direct replacement.
- Excessive output ripple visible on a scope — degraded rectifier on the output, output capacitors no longer filtering cleanly.
- Overcurrent trip at startup — short across the rectifier drawing the primary into protection.
- Preventive PSU refurbishment — replace alongside output capacitors during a complete APW9 rebuild.
SBL3040CT Schottky Rectifier Specifications
| Feature | Specification |
|---|---|
| Part Number | SBL3040CT |
| Diode Type | Schottky barrier rectifier (silicon, majority carrier) |
| Reverse Voltage (VRRM) | 40 V – 45 V |
| Forward Current (IF) | 30 A |
| Forward Voltage Drop | Low VF (typical Schottky envelope) |
| Surge Capability | High — guard ring transient protection |
| Package | TO-220AB molded plastic |
| Flammability Rating | UL94 V-0 |
| Typical Use | Bitmain APW9 / APW9+ PSU output stage |
| Mounting | Through-hole, heat-sink rated |
FAQ — SBL3040CT Schottky Rectifier
Q: What's the difference between the SBL3040CT and the SBL2040CT / SBT20100CT?
A: Same Schottky family, different current rating (20A vs 30A) and different voltage rating (40V vs 100V). Match the exact part the original PSU specs — substituting a lower-current rectifier in a higher-current rail will fail under load.
Q: How do I confirm the SBL3040CT is the failed component?
A: Forward-bias and reverse-bias test with a multimeter — a healthy Schottky reads ~0.3-0.5V forward and infinite reverse. Short either direction or open both ways = failed. Visual inspection catches the obvious burn cases.
Q: Is heat-sinking required when installing?
A: Yes — the TO-220AB package needs to be mounted to a heat sink (typically the PSU's main aluminium chassis or output PCB heat-spreader) to handle 30A continuous. Without heat-sinking the part will overheat and fail under load.
Q: Bulk pricing for repair shops?
A: Yes — email contact@lys-sz.com with your monthly volume. Tube quantities are stocked.
Related products
- MUR1620CTR 16A 200V Ultrafast Rectifier – Antminer APW12
- SBT20L100CT 20A 100V Schottky Diode – Bitmain APW12
- BYC15-600P Ultrafast Power Diode – ASIC PSU
- APW9 PSU – Antminer S17 / T17
Repair shops stocking SBL3040CT rectifiers by the tube? 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).
