STPS80H100C-Y STMicroelectronics Schottky Diode (Transistor Outline, Vertical) In Stock
The STPS80H100C-Y is an automotive-grade dual 40 A, 100 V low-voltage-drop power Schottky rectifier from STMicroelectronics, AEC-Q101 qualified for harsh vehicle environments. Available from stock worldwide with fast shipping.
- Manufacturer
- STMicroelectronics
- Package
- Transistor Outline, Vertical
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- STPS80H100C-Y Datasheet PDF
- Category
- Schottky Diode
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Dual 40 A cathode-common Schottky rectifier with 100 V reverse voltage and typical forward drop of 0.57 V at 40 A for high-efficiency rectification
- AEC-Q101 automotive qualified (-Y suffix) with operation up to 175°C junction temperature for under-hood and powertrain applications
- Low reverse recovery charge enables high-frequency switching in automotive DC-DC converters, reducing switching losses and EMI
Applications
The STPS80H100C-Y is designed for automotive alternator rectification, DC-DC boost converters, and battery charging systems where 80 A total current capacity at 100 V with minimal forward voltage drop improves system efficiency and reduces thermal management requirements. Its AEC-Q101 qualification and 175°C junction temperature rating make it a reliable choice for engine-bay power management modules, electric vehicle auxiliary power units, and 48 V mild-hybrid system rectifiers.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for STPS80H100C-Y:
Rectifier Diode, Schottky, 1 Phase, 2 Element, 40A, 100V V(RRM), Silicon
Frequently Asked Questions
What are the current and voltage ratings of the STPS80H100C-Y and how is the current split between its two diodes?
The STPS80H100C-Y is a dual Schottky rectifier with a repetitive peak reverse voltage of 100 V. Each of the two internal diodes is rated at 40 A average forward current, giving 80 A total in a cathode-common configuration. The typical forward voltage drop is 0.57 V at 40 A per diode, significantly lower than comparable silicon rectifiers at 0.9 V to 1.1 V.
What does the -Y suffix on STPS80H100C-Y indicate and what automotive reliability standard does it meet?
The -Y suffix designates AEC-Q101 automotive qualification, confirming that the STPS80H100C-Y has passed the Automotive Electronics Council's stress test protocol for discrete semiconductors. This includes high-temperature reverse bias (HTRB) at 100 V for 1000 hours and thermal cycling from -65°C to 175°C, validating suitability for safety-critical automotive power circuits over the expected 15-year vehicle lifetime.
What package does the STPS80H100C-Y come in and how should the thermal interface be designed for 80 A operation?
The STPS80H100C-Y is housed in a TO-247 (vertical) package with a junction-to-case thermal resistance of approximately 1.0°C/W per diode. At 40 A per diode with 0.57 V forward drop, each diode dissipates about 22.8 W, requiring a heatsink with thermal resistance below 3°C/W to keep the junction below 175°C at a 70°C ambient. Thermal interface material with conductivity above 1 W/m·K is recommended between the package and heatsink.
How does STPS80H100C-Y perform in automotive alternator bridge rectifier designs compared to standard silicon diodes?
In a 3-phase alternator bridge rectifier at 80 A output, replacing standard silicon diodes (1.0 V forward drop) with STPS80H100C-Y Schottky diodes (0.57 V) reduces rectifier conduction losses by approximately 43%, equivalent to saving around 34 W at full load in a 12 V automotive charging system. This efficiency improvement reduces alternator thermal load and can improve fuel economy by a measurable fraction of a percent.
Can STPS80H100C-Y be used in 48 V mild-hybrid vehicle systems and what derating applies?
Yes, the 100 V reverse voltage rating provides adequate margin for 48 V bus systems where transients can reach 60 V to 80 V under load-dump conditions. At 48 V systems the current per diode should be derated to account for higher reverse voltage stress; STMicroelectronics recommends operating at no more than 80% of rated current (32 A per diode) at elevated temperatures above 125°C junction to maintain the AEC-Q101 reliability target over the vehicle service life.
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About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
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