Part Number: STPS40H100CW
Function: 100V, 20A, High voltage power Schottky Rectifier
Package: TO-247 Type
Manufacturer: STMicroelectronics
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Description
The STPS40H100CW is a dual center-tap Schottky rectifier rated at 100V and 40A total (2 × 20A), designed for high-efficiency power conversion in high-frequency applications. Fabricated using advanced Schottky barrier technology, it offers very low forward voltage drop and negligible reverse recovery losses, making it highly suitable for switch-mode power supplies (SMPS), DC-DC converters, and inverter systems. The device is housed in a TO-247 package for effective thermal management and high current capability.
Features
- Dual center-tap configuration (2 × 20A)
- Negligible switching losses due to Schottky operation (no reverse recovery)
- Low forward voltage drop (VF) for improved efficiency
- Low reverse leakage current
- Optimized trade-off between leakage and conduction loss
- Low thermal resistance package (TO-247)
- Avalanche capability specified for robustness
- Suitable for high-frequency operation
Pinout
Absolute Maximum Ratings (Tc = 25 °C)
| Parameter | Symbol | Value | Unit |
| Repetitive Peak Reverse Voltage | VRRM | 100 | V |
| Average Forward Current (per diode) | IF(AV) | 20 | A |
| Surge Forward Current | IFSM | (Typically high, consult datasheet) | A |
| Operating Junction Temperature | Tj | 150 | °C |
| Storage Temperature | Tstg | -55 to 150 | °C |
Design Notes
- Schottky structure eliminates reverse recovery charge (Qrr ≈ 0), significantly reducing switching loss in high-frequency converters
- Forward voltage typically ranges ~0.5–0.85V depending on current and temperature, improving efficiency over PN diodes
- Thermal design is critical: TO-247 allows mounting to heatsink for high current operation
- Leakage current increases with temperature — consider thermal derating in high ambient conditions
- Center-tap configuration is ideal for full-wave rectification in push-pull or half-bridge topologies
Typical Circuit Usage
- Output rectification stage in SMPS (flyback, forward, half-bridge)
- Freewheeling diode in buck converters
- High-frequency DC-DC converter rectifier
- Secondary-side rectification in isolated converters
- Inverter output rectification
How to Choose This Part
- Select for applications requiring fast switching and low loss at ≤100V
- Ensure average and surge current margins are sufficient
- Prefer for high-frequency (>50kHz) operation where PN diode losses are significant
- Evaluate thermal resistance and heatsinking requirements carefully
- Consider leakage characteristics in high-temperature environments
Applications
- Switch-mode power supplies (SMPS)
- High-frequency DC-DC converters
- Power inverters
- UPS systems
- Industrial power conversion systems
Alternative / Equivalent Products
- MBR40200CT (200V higher voltage alternative)
- STPS60L100CW (higher current variant)
- VS-40CPQ100 (Vishay equivalent)
- BYV32 series (ultrafast alternative, not Schottky)
- STPS30H100CT (lower current option)
Other data sheets are available within the file: STPS40H100, STPS40H100C
STPS40H100CW Datasheet PDF Download
