STPS40A45CHY1 STMicroelectronics Schottky Diode (Transistor Outline, Vertical) In Stock
STMicroelectronics STPS40A45CHY1 is an aerospace-grade dual Schottky rectifier with 2x20A forward current and 45V reverse voltage in a TO-254AA package. It features a common-cathode configuration and 0.82V max forward voltage for high-reliability rectification. Available from stock worldwide with competitive pricing.
- Manufacturer
- STMicroelectronics
- Package
- Transistor Outline, Vertical
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- STPS40A45CHY1 Datasheet PDF
- Category
- Schottky Diode
- Temp Range
- -65.0°C to 175.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of STPS40A45CHY1?
- Aerospace-qualified dual common-cathode Schottky rectifier rated at 2x20A and 45V, designed for harsh-environment high-reliability power systems
- Ultra-low 0.82V maximum forward voltage at 20A per element minimizes conduction losses in space and defense power conversion stages
- 200A non-repetitive peak forward current capability provides robust surge protection in demanding aerospace rectifier and freewheeling diode applications
What is STPS40A45CHY1 used for?
The STPS40A45CHY1 is qualified for aerospace and high-reliability applications where dual 20A Schottky rectifiers must withstand harsh vibration, wide temperature extremes, and strict lot-traceability requirements. Its common-cathode dual configuration simplifies full-wave and center-tap rectifier designs in satellite onboard power supplies and defense-grade DC-DC converters operating from 28V bus systems. Engineers also select it for space-flight power conditioning modules where the 0.82V forward voltage and 200A surge rating ensure margin against transient fault conditions without requiring parallel device redundancy.
What are the specifications of STPS40A45CHY1?
| Date Of Intro | 2020-03-20 |
| YTEOL | 5.7 |
| Application | GENERAL PURPOSE |
| Configuration | COMMON CATHODE, 2 ELEMENTS |
| Diode Element Material | SILICON |
| Diode Type | RECTIFIER DIODE |
| Forward Voltage-Max (VF) | 0.82V |
| JEDEC-95 Code | TO-254AA |
| JESD-30 Code | S-MSFM-P3 |
| Non-rep Pk Forward Current-Max | 200A |
| Number of Elements | 2 |
| Number of Phases | 1 |
| Output Current-Max | 20A |
| Package Body Material | METAL |
| Package Shape | SQUARE |
| Package Style | FLANGE MOUNT |
| Rep Pk Reverse Voltage-Max | 45V |
| Reverse Current-Max | 25 µA |
| Reverse Test Voltage | 45V |
| 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 |
| HTS Code | 8541.10.00.80 |
| Country of Origin | France |
Where can I find the STPS40A45CHY1 datasheet?
STPS40A45CHY1 Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for STPS40A45CHY1?
Compatible alternatives and drop-in replacements for STPS40A45CHY1:
Rectifier Diode, Schottky, 1 Phase, 2 Element, 20A, 45V V(RRM), Silicon, TO-254AA
Rectifier Diode, Schottky, 1 Phase, 2 Element, 20A, 45V V(RRM), Silicon, TO-254AA
Frequently Asked Questions
What is the per-element current rating and forward voltage of STPS40A45CHY1, and how do these benefit aerospace power supplies?
Each of the 2 Schottky elements in STPS40A45CHY1 is rated at 20A continuous forward current with a maximum forward voltage of 0.82V. At 20A, the 0.82V Vf means just 16.4W of conduction loss per element — critical in aerospace power supplies where every watt of thermal dissipation must be managed within a mass-constrained chassis at temperatures up to 150°C junction.
What is the surge current rating of STPS40A45CHY1 and when is this relevant in spacecraft rectifier designs?
STPS40A45CHY1 withstands a non-repetitive peak forward current of 200A, which is 10x the continuous 20A rating. This surge margin is important during spacecraft power bus recovery after a capacitor short-circuit event or load transient, where inrush currents can briefly exceed 100A before the fault is cleared by upstream protection circuitry.
How does the common-cathode configuration of STPS40A45CHY1 simplify a full-wave rectifier circuit in a 28V aerospace bus?
In a common-cathode dual Schottky package, both anode inputs share one cathode terminal. This lets designers build a 2-diode full-wave center-tap rectifier using a single component with only 3 PCB connections versus 2 separate diodes requiring 4 connections. For a 28V aerospace bus with 2 AC transformer secondary taps, this configuration reduces connector count and potential failure points in a flight-critical rectifier stage.
What package does STPS40A45CHY1 use and how does it support the thermal management needs of a satellite power module?
STPS40A45CHY1 comes in a TO-254AA package, which is a 3-lead through-hole vertical package with an electrically isolated mounting tab. The isolated tab allows direct chassis mounting with a thermal interface material to achieve junction-to-case thermal resistance well under 2°C/W, supporting continuous 20A operation at ambient temperatures up to 100°C in a satellite power conditioning module without additional heat-spreading hardware.
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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.
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