PMEG4030EP AE 40V 3A Schottky Rectifier SOD-128 – Power Supply Repair
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PMEG4030EP (AE) 40V 3A Low-VF Schottky Rectifier in SOD-128 Package
The PMEG4030EP (marking AE) is a 40V, 3A low-forward-voltage Schottky barrier rectifier with an integrated guard ring for stress protection. It comes in a small, flat-lead SOD-128 SMD plastic package, suitable for both reflow and wave soldering.
Its low forward voltage and high power capability make it a good fit for low-voltage rectification, high-efficiency DC-DC conversion, switched-mode power supplies (SMPS) and reverse-polarity protection. Use it to replace a failed Schottky diode with the same 40V / 3A rating and SOD-128 footprint when repairing power circuits.
Key Features
- Average forward current IF(AV) up to 3A.
- Reverse voltage VR up to 40V.
- Low forward voltage for lower conduction losses and higher efficiency.
- Integrated guard ring for stress protection, and high power capability.
- Flat-lead SOD-128 package, compatible with reflow and wave soldering.
Signs of a Failed Schottky Rectifier
- Diode reading short (near 0V) in both directions in diode-test mode.
- Diode reading open in both directions, with no output on the rail it feeds.
- Visible burn mark, crack or discolouration on the package.
- Overheating around the diode, or a blown fuse upstream on the same rail.
PMEG4030EP Specifications
| Parameter | Value |
|---|---|
| Part Number | PMEG4030EP |
| Marking Code | AE |
| Type | Low-VF Schottky barrier rectifier |
| Reverse Voltage (VR) | ≤ 40V |
| Average Forward Current IF(AV) | ≤ 3A |
| Forward Voltage | Low |
| Protection | Integrated guard ring |
| Package | SOD-128, flat-lead SMD plastic |
| Soldering | Reflow and wave soldering |
| Applications | Low-voltage rectification, DC-DC conversion, SMPS, reverse-polarity protection |
| Condition | New |
FAQ
What does the AE marking mean?
AE is the marking code printed on the PMEG4030EP package. Check it against the diode on your board to confirm the replacement.
Can I replace it with a different 40V Schottky diode?
Only if the replacement matches the 40V reverse voltage, the 3A average current and the SOD-128 footprint. A lower current rating or a different package will not fit the same position reliably.
How is it soldered?
The flat-lead SOD-128 package supports both reflow and wave soldering, and can be reworked with a hot-air station.
Do you sell it in volume?
Yes. Email us with the quantity you need and we will send a quote.
Related Schottky Diodes & Rectifiers
- MBR540MFS 40V 5A Schottky Rectifier – Antminer S9 / L3+ / D3 Hashboard
- SS2040LL R4 40V 2A Schottky Rectifier SOD-123 – Whatsminer Hashboard
- HBR3200 / SS320 Schottky Barrier Diode
- MBR230LSFT1G L3NE 30V 2A Schottky Rectifier – Antminer L7 Hashboard
Need PMEG4030EP diodes for a repair bench? Email contact@lys-sz.com for volume pricing.
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