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
Key Features
- 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
Applications
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.
Specifications
| 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 |
Alternate & Equivalent Parts
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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