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
What are the key features of STPS80H100C-Y?
- 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
What is STPS80H100C-Y used for?
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) |
Where can I find the STPS80H100C-Y datasheet?
STPS80H100C-Y Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for STPS80H100C-Y?
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.
Related Guides
DP83TG720SWRHATQ1 Automotive Ethernet PHY Selection Guide
Choose DP83TG720SWRHATQ1 by comparing MAC interfaces, exact ordering codes, qualification evidence, and documented supply offers.
Nov 15, 2026
TLV76033 Selection Guide: Headroom, Heat, and Sourcing
Choose a TLV76033 3.3-V supply using manufacturer ratings, load profiles, dropout calculations, thermal checks, and exact orderable parts.
Nov 14, 2026
DP83TG720SWRHATQ1 Automotive Ethernet Board Design Guide
A practical DP83TG720SWRHATQ1 board checklist for host interfaces, startup, channel validation, qualified variants, and sourcing.
Nov 14, 2026
BQ76942PFBR Battery Monitor Selection and Procurement Guide
Choose BQ76942PFBR by cell count, protection architecture, factory configuration, measurement needs, and a controlled sourcing specification.
Nov 13, 2026
Why Buy from FindMyChip
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.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”
You May Also Like
B5817WS-TP
Micro Commercial Components (MCC)
Schottky Diode
RB161VAM-20TR
ROHM Semiconductor
Schottky Diode
RBE2VAM20ATR
ROHM Semiconductor
Schottky Diode
CDBA5150-HF
Comchip Technology
Schottky Diode
RB168MM150TR
ROHM Semiconductor
Schottky Diode
BAS285-GS18
Vishay
Schottky Diode
BAT54WX-TP
Micro Commercial Components (MCC)
Schottky Diode
SCS215KGHRC
ROHM Semiconductor
Schottky Diode
SK54C
Taiwan Semiconductor
Schottky Diode
SS2150-LTP
Micro Commercial Components (MCC)
Schottky Diode
SD1206S020S1R0
AVX
Schottky Diode
1N5819HW-7
Diodes Inc.
Schottky Diode
SCS206AMC
ROHM Semiconductor
Schottky Diode
SCS220AMC
ROHM Semiconductor
Schottky Diode
RB058L-60TE25
ROHM Semiconductor
Schottky Diode
MSS1P6-M3/89A
Vishay
Schottky Diode
NSR0240P2T5G
ON Semiconductor
Schottky Diode
SK1010-TP
Micro Commercial Components (MCC)
Schottky Diode
CRS15(TE85L,Q,M)
Toshiba
Schottky Diode
MBR0560-TP
Micro Commercial Components (MCC)
Schottky Diode
RB520SM-40T2R
ROHM Semiconductor
Schottky Diode
MBRM130LT3G
ON Semiconductor
Schottky Diode
SK310B-LTP
Micro Commercial Components (MCC)
Schottky Diode
SK310B-TP
Micro Commercial Components (MCC)
Schottky Diode