SS34-E3/57T S4 40V 3A Schottky Diode - for Whatsminer P221B 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
SS34-E3/57T S4 Schottky Diode 40V / 3A | SMD Rectifier Replacement for Whatsminer P221B Power Supply Repair
The SS34-E3/57T (S4 marking) Schottky barrier rectifier is a 40V / 3A surface-mount diode used on Whatsminer P221B power supplies. Drop-in replacement when an original SS34 rectifier fails — restores stable output and reduces downtime on the repair bench. The low forward voltage drop minimises conduction loss; the high surge capability protects against the transient events that come with switching-mode PSU duty.
Built as a SMD Schottky barrier rectifier with the standard S4 package marking. 40V repetitive peak reverse voltage, 3A average forward current, low forward voltage drop and high surge capability — the standard combination for output-stage rectification on switching-mode mining PSUs. Targeted repair restores the P221B at a fraction of full PSU replacement cost.
When to Replace the SS34-E3/57T
- P221B output rail dead or out of spec — rectifier failed open or short, primary controller can't drive the output cleanly.
- Visible burn or thermal damage on the SS34 package — direct replacement, swap any paralleled rectifiers on the same leg.
- 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 pulling the primary into protection.
- Preventive PSU refurbishment — replace alongside output capacitors during a complete P221B rebuild.
SS34-E3/57T Schottky Diode Specifications
| Feature | Specification |
|---|---|
| Part Number | SS34-E3/57T |
| Marking | S4 |
| Diode Type | Schottky barrier rectifier |
| Voltage Rating (VRRM) | 40V |
| Current Rating (IO) | 3A average |
| Forward Voltage Drop | Low (typical Schottky envelope) |
| Surge Capability | High |
| Power Loss | Low |
| Package | Surface Mount (SMD) |
| Typical Use | Whatsminer P221B PSU output stage |
| Condition | Brand New |
FAQ — SS34-E3/57T Schottky Diode
Q: How do I confirm the SS34 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 the SS34-E3/57T interchangeable with other SS34 variants (SS34, SS34A, SS34B etc.)?
A: All SS34-family variants share the same 40V / 3A core envelope but differ in marking, package, or vendor-specific characteristics. The E3/57T suffix is a specific Vishay (or equivalent) variant — match the exact part marking on your original board for the best result.
Q: Does this diode also fit other Whatsminer P-series PSUs?
A: The SS34 is widely used across multiple Whatsminer PSU generations — verify against the original part marking on your specific PSU board before substituting.
Q: Bulk pricing for repair shops?
A: Yes — email contact@lys-sz.com with your monthly volume. Reel and tube quantities are stocked.
Related products
- SS810 8A 100V Schottky Rectifier – Iceriver Control Board
- SBL3040CT Schottky Rectifier 30A 40V – Bitmain APW9 PSU
- MUR1620CTR 16A 200V Ultrafast Rectifier – Antminer APW12
- Whatsminer P231B / P232B Switching Power Supply
Repair shops stocking SS34 Schottky diodes by the reel? 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).
