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STMicroelectronics STPS40L45CGY-TR
- Part No.:
- STPS40L45CGY-TR
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
STPS40L45CGY-TR.pdf
- Description:
- DIODE ARRAY SCHOTT 45V 20A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:8,713
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Product details
Overview
STPS40L45CGY-TR from STMicroelectronics is an automotive-grade dual center-tap Schottky barrier rectifier in D²PAK package, rated for 45 V repetitive peak reverse voltage, 2 × 20 A average forward current (Tc = 130 °C), and maximum forward voltage drop of 0.49 V at 20 A and 125 °C. It delivers low conduction and switching losses, supports high-frequency DC/DC conversion, and is qualified to AEC-Q101 for under-hood automotive power systems.
For engineers reviewing the STPS40L45CGY-TR datasheet, STPS40L45CGY-TR pinout, STPS40L45CGY-TR application, or STPS40L45CGY-TR equivalent, key selection criteria include its dual-diode thermal coupling behavior, avalanche-rated 8100 W pulse capability, junction-to-case thermal resistance of 1.5 °C/W per diode, and suitability for free-wheeling and polarity protection in 12 V/24 V automotive inverters and converters.
Technical Context
This dual-center-tap Schottky rectifier integrates two independent anode-cathode paths sharing a common cathode terminal (K), enabling synchronous half-wave rectification or independent low-loss freewheeling paths. Its silicon design features low dV/dt rating (10,000 V/µs) and specified avalanche capability-critical for inductive load commutation in automotive SMPS.
Thermal performance is defined per diode: Rth(j–c) = 1.5 °C/W, with coupling resistance Rth(c) = 0.1 °C/W between diodes, allowing accurate junction temperature estimation when both diodes conduct simultaneously. The device operates up to 150 °C junction temperature and supports surge currents up to 230 A (10 ms sine).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum reverse blocking voltage before breakdown; defines safe operation in 24 V automotive systems with transient spikes. |
| IF(AV) per diode | 20 A at Tc = 130 °C - Continuous DC current handling per diode; enables compact heatsink design in space-constrained modules. |
| VF(max) | 0.49 V at IF = 20 A, Tj = 125 °C - Low forward drop minimizes conduction loss: ~9.8 W total per diode at full load. |
| IFSM | 230 A (10 ms sine) - Peak surge rating supports motor startup and load dump transients without failure. |
| Rth(j–c) per diode | 1.5 °C/W - Enables direct thermal modeling from junction to heatsink; critical for reliability validation in automotive thermal cycling. |
| PARM | 8100 W (tp = 1 µs, Tj = 25 °C) - Avalanche energy rating allows safe clamping of inductive kickback in relay or solenoid drivers. |
Pinout & Package
Package: D²PAK (TO-263-3L), surface-mount, thermally enhanced plastic package with exposed copper drain tab for direct heatsink mounting. Meets UL94 V0 flammability rating and ECOPACK® environmental compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Anode 1 | First Schottky diode anode; used for independent or interleaved rectification path. |
| A2 | Anode 2 | Second Schottky diode anode; electrically isolated from A1 but thermally coupled via shared case. |
| K | Common Cathode | Shared cathode terminal; simplifies PCB layout for center-tap transformer secondary or dual-output DC/DC topologies. |
Key Features
| Feature | Design Value |
|---|---|
| Low VF at high temperature | 0.42 V typ. at 20 A / 125 °C - reduces thermal runaway risk and improves efficiency in hot under-hood environments. |
| Avalanche-rated operation | 8100 W peak power (1 µs) - eliminates need for external snubbers in inductive switching applications like fuel injector drivers. |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity, and mechanical shock - ensures long-term reliability in OEM power modules. |
| Dual-diode thermal coupling | Rth(c) = 0.1 °C/W between diodes - enables accurate multi-diode thermal simulation for system-level junction temperature prediction. |
Applications
| Automotive DC/DC Converter | Engine Control Unit (ECU) Power Stage |
|---|---|
Use Scenario: High-efficiency 12 V to 5 V/3.3 V step-down converter supplying microcontroller and sensor rails in modern ECUs. IC Role / Device Role / Timing Role: Dual Schottky rectifier provides synchronous rectification in center-tapped forward or push-pull topology. Use Value: 0.49 V VF(max) cuts conduction loss by >35% vs. standard silicon diodes, reducing heatsink size and improving cold-cranking margin. | Use Scenario: Polarity protection and freewheeling path for solenoid drivers controlling variable valve timing (VVT) actuators. IC Role / Device Role / Timing Role: Freewheeling diode clamps inductive kickback during MOSFET turn-off; common cathode simplifies PCB routing. Use Value: 230 A IFSM and 8100 W PARM ensure robustness against repeated inductive surges without derating. |
| On-Board Charger (OBC) Auxiliary Supply | 12 V Battery Backup System |
Use Scenario: Isolated auxiliary power supply converting HV battery voltage to 12 V for control electronics in EV on-board chargers. IC Role / Device Role / Timing Role: Output rectifier in high-frequency resonant LLC converter operating above 100 kHz. Use Value: Low switching losses enable >95% efficiency at 200 kHz, meeting stringent OBC EMI and thermal targets. | Use Scenario: Reverse polarity and backfeed protection in dual-battery (12 V + 48 V) architectures for ADAS domain controllers. IC Role / Device Role / Timing Role: Bidirectional blocking element preventing cross-charging between battery domains during fault conditions. Use Value: 45 V VRRM and 150 °C Tj(max) support operation across wide ambient range (-40 °C to +105 °C ambient) with safety margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STPS30L45CGY-TR | Lower IF(AV) = 15 A per diode; identical VRRM, VF, and package. | Suitable for lower-power auxiliary supplies (<300 W); reduced thermal mass affects transient response. | Select when system peak current stays below 15 A per diode and board space constraints favor same footprint. |
| VS-45CTQ045PbF | Single-die dual common-cathode configuration; Rth(j–c) = 1.7 °C/W; no avalanche rating. | Lacks PARM specification; requires external clamping for inductive loads; not AEC-Q101 qualified. | Use only in non-automotive industrial DC/DC where cost is prioritized over automotive reliability and surge immunity. |
Compared with STPS30L45CGY-TR and VS-45CTQ045PbF, the STPS40L45CGY-TR uniquely combines 20 A per diode rating, AEC-Q101 qualification, and 8100 W avalanche capability-making it the only choice for thermally demanding, safety-critical automotive power stages requiring both continuous current headroom and transient robustness.
Availability
STPS40L45CGY-TR is available at Aetrix Electronics and suitable for automotive DC/DC converters, engine control unit (ECU) power stages, and on-board charger (OBC) auxiliary supplies requiring stable component supply, long lifecycle assurance, and traceable sourcing.
Supply support for STPS40L45CGY-TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, MCU, power, and sensing solutions for automotive, industrial, and consumer markets.
The STPS series is ST's automotive-qualified Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in harsh-temperature vehicle subsystems-from body electronics to powertrain controls.
FAQ
What is the thermal coupling behavior between the two diodes in STPS40L45CGY-TR?
The device exhibits measured thermal coupling resistance Rth(c) = 0.1 °C/W between diodes, meaning heat generated in one diode raises the junction temperature of the other. This must be included in thermal modeling using ΔTj(diode1) = P1 × 1.5 + P2 × 0.1, per datasheet Equation 1. Ignoring coupling risks underestimating peak junction temperature by up to 12 °C at full dual-load conditions.
Can STPS40L45CGY-TR replace a single 40 A Schottky diode in a center-tap transformer design?
No-it contains two independent 20 A diodes sharing a common cathode, not a single 40 A device. Its electrical rating is 2 × 20 A (per diode), with thermal limits defined separately. Using it as a single-path 40 A rectifier violates absolute ratings and risks thermal runaway due to uneven current sharing and inadequate heatsinking per die.
Is the 8100 W avalanche rating usable for repetitive operation?
No-the 8100 W rating applies only to single 1 µs pulses at Tj = 25 °C. Repetitive avalanche operation is not characterized or guaranteed. For repetitive inductive switching, designers must ensure voltage transients stay within VRRM or implement active clamping; sustained avalanche degrades long-term reliability even below rated energy.
Does STPS40L45CGY-TR require a minimum copper area on PCB for thermal performance?
Yes-Figure 10 shows Rth(j–a) drops from ~30 °C/W (no copper) to ~15 °C/W with 40 cm² of 35 µm copper on FR4. For automotive applications, ST recommends ≥10 cm² of 2 oz copper under the tab, connected to internal ground planes via ≥6 thermal vias (0.3 mm diameter), to maintain Tj ≤ 150 °C at full 20 A load.
STPS40L45CGY-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io) (per Diode):
- 20A
- Voltage - Forward (Vf) (Max) @ If:
- 530 mV @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 600 µA @ 45 V
- Operating Temperature - Junction:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK
STPS40L45CGY-TR FAQ
1.How can I place an order for STPS40L45CGY-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS40L45CGY-TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for STPS40L45CGY-TR reliable?
The price and inventory of STPS40L45CGY-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS40L45CGY-TR is usually 5 days.
3.What payment methods are accepted for STPS40L45CGY-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS40L45CGY-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS40L45CGY-TR?
STPS40L45CGY-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS40L45CGY-TR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for STPS40L45CGY-TR?
For technical support, including STPS40L45CGY-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS40L45CGY-TR requirements.
6.How does Aetrix verify that STPS40L45CGY-TR is sourced from the original manufacturer or authorized distributors?
All STPS40L45CGY-TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STPS40L45CGY-TR meets industry standards.
7.What is the process for return or replacement of STPS40L45CGY-TR?
All STPS40L45CGY-TR units undergo pre-shipment inspection (PSI). If there is an issue with STPS40L45CGY-TR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The STPS40L45CGY-TR part is unused and in its original packaging.
Return procedure for STPS40L45CGY-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS40L45CGY-TR Tags
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