July 28, 2025
966
SK55BHM4G, developed by Taiwan Semiconductor, is a surface-mount Schottky rectifier that features low forward voltage drop, high current capability, and excellent efficiency. It is widely used in power modules, chargers, battery protection circuits, and DC-DC converters. This article provides a comprehensive overview of its specifications, pinout, key features, and typical applications.
| Specification | Details |
|---|---|
| Part Number | SK55BHM4G |
| Package | DO-214AB (SMC) |
| Max Average Rectified Current | 5A |
| Max Reverse Voltage (VR) | 55V |
| Max Forward Voltage (VF @ 5A) | 0.70V |
| Peak Surge Current (IFSM) | 150A (8.3ms half sine) |
| Operating Temperature | -55°C to +150°C |
| RoHS / Halogen Free | Yes |
With a compact SMC package and excellent thermal performance, SK55BHM4G is suitable for high-density PCB layouts and automated SMT production lines.
● ✅ Low Forward Voltage Drop (VF): Maximum 0.70V, reduces conduction loss and increases efficiency.
● ✅ High Surge Current Capability: Withstands short-term high current surges, ideal for input protection.
● ✅ Wide Operating Temperature: Ensures stability in industrial environments.
● ✅ Robust SMC Package: High mechanical strength, suitable for harsh applications.
● ✅ Environmental Compliance: RoHS and halogen-free.
SK55BHM4G uses the standard SMC package with two terminals:
● Pin 1 – Cathode (K)
● Pin 2 – Anode (A)
This package is compact, compatible with reflow and wave soldering, and well-suited for space-constrained layouts.
With its excellent rectification efficiency and low VF, SK55BHM4G is ideal for:
1. DC-DC Power Converters
2. Reverse Voltage Protection Circuits
3. LED Drivers
4. Output Rectification in AC-DC Power Supplies
5. Battery Chargers and Adapters
| Model | Avg. Current | Reverse Voltage | Forward Voltage | Package |
|---|---|---|---|---|
| SK55BHM4G | 5A | 55V | 0.70V | SMC |
| SK36BHM4G | 3A | 60V | 0.55V | SMC |
| SS54SMC | 5A | 40V | 0.50V | SMC |
For applications requiring higher voltage or lower VF, other models in the same series can be considered.
When selecting a Schottky diode, consider the following:
● ✔️ Is low VF essential to reduce power loss and heat?
● ✔️ Is the current requirement within 5A?
● ✔️ Is the reverse voltage rating ≤ 55V?
● ✔️ Is SMC package suitable for your board layout?
If so, SK55BHM4G offers excellent value and performance for your application.
Censtry Electronics provides genuine SK55BHM4G with reliable sourcing, technical documents, and fast delivery. All parts are RoHS-compliant and quality-assured.
