STPS40100C2FY1 STMicroelectronics Schottky Diode (Transistor Outline, Vertical) In Stock
STMicroelectronics STPS40100C2FY1 is an aerospace-grade dual 20 A, 100 V power Schottky rectifier in a TO-254AA isolated common-cathode package. It features a maximum forward voltage of 0.9 V and low-noise silicon Schottky technology for high-efficiency power conversion. Designed for aerospace power supplies, DC-DC converters, and medium-voltage rectification in harsh-environment applications.
- Manufacturer
- STMicroelectronics
- Package
- Transistor Outline, Vertical
- Pin Count
- 3
- Lifecycle
- NOT RECOMMENDED
- Datasheet
- STPS40100C2FY1 Datasheet PDF
- Category
- Schottky Diode
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of STPS40100C2FY1?
- Dual 20 A current rating per element with 100 V reverse voltage for medium-voltage power stages
- Maximum forward voltage of only 0.9 V minimizing conduction losses in high-efficiency rectifier designs
- Aerospace-qualified low-noise Schottky silicon technology for EMI-sensitive avionic power supplies
- Common-cathode isolated TO-254AA package enabling flexible heatsink mounting without electrical isolation pads
- Suitable for space and defense applications requiring MIL-grade reliability and long operational lifetime
What is STPS40100C2FY1 used for?
The STPS40100C2FY1 is engineered for aerospace and defense power conversion systems, including avionics DC bus rectifiers, satellite power conditioning units, and military-grade switching power supplies operating at 100 V bus voltages. Its common-cathode dual configuration simplifies full-wave rectifier and center-tap circuit topologies, reducing component count in compact power modules. The device is also used in high-reliability industrial power converters and rail traction auxiliary supplies where low forward voltage drop and long service life are mandatory.
What are the specifications of STPS40100C2FY1?
| YTEOL | 3 |
| Additional Feature | LOW NOISE |
| Application | MEDIUM VOLTAGE POWER |
| Case Connection | ISOLATED |
| Configuration | COMMON CATHODE, 2 ELEMENTS |
| Diode Element Material | SILICON |
| Diode Type | RECTIFIER DIODE |
| Forward Voltage-Max (VF) | 0.9V |
| JEDEC-95 Code | TO-254AA |
| JESD-30 Code | S-MSFM-P3 |
| Non-rep Pk Forward Current-Max | 300A |
| Number of Elements | 2 |
| Number of Phases | 1 |
| Package Body Material | METAL |
| Package Shape | SQUARE |
| Package Style | FLANGE MOUNT |
| Reference Standard | AEC-Q101 |
| Rep Pk Reverse Voltage-Max | 100V |
| Reverse Current-Max | 30 µA |
| Surface Mount | NO |
| Technology | SCHOTTKY |
| Terminal Form | PIN/PEG |
| Terminal Position | SINGLE |
| Package | Transistor Outline, Vertical |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| Country of Origin | France |
Where can I find the STPS40100C2FY1 datasheet?
STPS40100C2FY1 Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for STPS40100C2FY1?
Compatible alternatives and drop-in replacements for STPS40100C2FY1:
STMicroelectronics Rectifier Diode, Schottky, 1 Phase, 2 Element, 100V V(RRM), Silicon, TO-254AA
Rectifier Diode, Schottky, 1 Phase, 2 Element, 20A, 150V V(RRM), Silicon
Rectifier Diode, Schottky, 1 Phase, 2 Element, 20A, 120V V(RRM), Silicon, TO-220AB
Rectifier Diode, Schottky, 1 Phase, 2 Element, 20A, 170V V(RRM), Silicon, TO-220AB
Frequently Asked Questions
What makes the STPS40100C2FY1 suitable for aerospace power conversion designs compared to standard commercial Schottky rectifiers?
The STPS40100C2FY1 is qualified for aerospace applications and features a low-noise Schottky silicon die process that reduces conducted EMI in sensitive avionics power buses. Its 100 V reverse voltage rating and 40 A total current capacity (2 x 20 A elements) cover the margin requirements imposed by aerospace derating guidelines, which typically require components to operate at 50% to 70% of their rated electrical limits to ensure the reliability levels demanded over a 20-year or longer service life.
How does the 0.9 V maximum forward voltage of the STPS40100C2FY1 affect power supply efficiency?
At a forward voltage of 0.9 V carrying 20 A per element, the STPS40100C2FY1 dissipates a maximum of 18 W per diode element, which is significantly less than the 1.2 V to 1.5 V drop of equivalent bipolar rectifiers at the same current. This lower conduction loss improves overall power supply efficiency by approximately 1% to 2% in a 400 W to 500 W stage, reducing heatsink size requirements and thermal management costs in sealed aerospace enclosures.
What circuit topologies benefit most from the common-cathode dual configuration of the STPS40100C2FY1?
The common-cathode configuration of the STPS40100C2FY1 is ideal for center-tap full-wave rectifier circuits, where both anodes connect to the transformer secondary center-tap windings and a single cathode output feeds the DC bus. This topology is common in push-pull and full-bridge DC-DC converters operating at 100 V output and is widely used in aerospace 28 V to 270 V bus converters. The isolated TO-254AA package allows both elements to share a common heatsink without an insulating bushing, simplifying thermal management.
How should the STPS40100C2FY1 be derated for a satellite power conditioning unit operating over a -55°C to 125°C junction temperature range?
Aerospace derating standards typically require Schottky rectifiers to operate at no more than 70% of their maximum continuous current and 70% of their peak reverse voltage. For the STPS40100C2FY1 this means limiting each element to 14 A continuous and the reverse voltage to 70 V in a satellite power conditioning unit, while ensuring the case temperature stays below the maximum rated limit to keep junction temperature within the -55°C to 150°C absolute maximum range. Proper heatsink selection with at most 2°C/W thermal resistance is recommended for a 14 A derating scenario.
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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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