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STMicroelectronics STPS10L40CT
- Part No.:
- STPS10L40CT
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-220-3
- Datasheet:
-
STPS10L40CT.pdf
- Description:
- DIODE ARRAY SCHOTT 40V 5A TO-220
- Quantity:
- Payment:
- Shipping:
Inventory:937
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Product details
Overview
STPS10L40CT from STMicroelectronics is a dual center-tap Schottky rectifier in TO-220AB package, rated for 40 V repetitive peak reverse voltage and 2 × 5 A average forward current per diode, with typical forward voltage of 0.36 V at 100 °C and 5 A. It is designed for low-voltage, high-frequency switch-mode power supplies, DC–DC converters, freewheeling, and polarity protection circuits.
For engineers reviewing the STPS10L40CT datasheet, STPS10L40CT pinout, STPS10L40CT application, or STPS10L40CT equivalent, key selection criteria include its low VF (0.36 V typ. @ 100 °C), avalanche-rated 190 W peak power, 150 °C max junction temperature, dual-diode thermal coupling behavior, and TO-220AB mechanical mounting compatibility.
Technical Context
This dual Schottky rectifier integrates two independent anode-cathode junctions sharing a common cathode terminal (center-tap configuration), enabling synchronous rectification or complementary freewheeling paths. Its Schottky barrier construction eliminates minority-carrier storage, delivering near-zero reverse recovery time and minimal dynamic switching losses.
Thermal design requires attention to junction-to-case resistance (3.0 °C/W per diode, 1.7 °C/W total) and inter-diode coupling (0.35 °C/W), as simultaneous conduction induces cross-heating-critical for high-duty-cycle DC–DC outputs and motor drive snubbers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum reverse blocking capability without breakdown; suitable for ≤36 V nominal input rails. |
| IF(AV) per diode | 5 A - Continuous DC current handling per anode leg at TC = 140 °C; device supports 10 A total average output when shared across both diodes. |
| VF (typ.) | 0.36 V @ 100 °C, 5 A - Low conduction loss enables >95% efficiency in 5–12 V output stages. |
| IFSM | 150 A @ 10 ms - Robust surge tolerance for inrush and short-circuit events in industrial SMPS. |
| Tj (max) | +150 °C - Enables operation in thermally constrained enclosures without derating below full current. |
| PARM | 190 W @ 10 µs, Tj = 125 °C - Avalanche energy rating supports unclamped inductive switching in flyback and buck-boost topologies. |
Pinout & Package
TO-220AB package with isolated tab (electrically connected to cathode), 3-pin outline: Pin 1 = Anode 1, Pin 2 = Cathode (common center tap), Pin 3 = Anode 2. Mounting torque: 0.55 N·m recommended, max 0.7 N·m.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (A1) | Anode of Diode 1 | Input path for first half of dual-output or interleaved converter phase. |
| Pin 2 (K) | Common Cathode (Center Tap) | Shared return node; must be thermally and electrically tied to heatsink and system ground reference. |
| Pin 3 (A2) | Anode of Diode 2 | Input path for second half of dual-output or complementary freewheeling leg. |
Key Features
| Feature | Design Value |
|---|---|
| Low VF Schottky architecture | Reduces conduction loss by ≥40% vs. silicon PN rectifiers at 5 A, directly improving light-load efficiency. |
| Avalanche-rated PARM | 190 W pulse rating allows safe operation during transient overvoltage without external clamping in cost-sensitive designs. |
| Dual-diode thermal coupling | 0.35 °C/W coupling factor enables accurate thermal modeling when both diodes conduct simultaneously in push-pull or center-tapped topologies. |
| ECOPACK®2 compliance | Meets RoHS and halogen-free requirements without compromising thermal or electrical performance in TO-220AB form factor. |
Applications
| Server VRM Output Stage | Industrial DC–DC Converter |
|---|---|
Use Scenario: High-current, low-voltage (≤12 V) point-of-load regulation in rack-mounted servers. IC Role / Device Role / Timing Role: Synchronous rectifier replacing MOSFETs in secondary-side synchronous rectification, leveraging low VF for reduced I²R loss. Use Value: Delivers 0.36 V forward drop at 5 A/100 °C-cutting conduction loss by ~0.8 W per diode versus standard Schottkys, lowering thermal load on heatsink. | Use Scenario: 24 V input to 5 V/10 A isolated DC–DC module for PLC I/O modules. IC Role / Device Role / Timing Role: Center-tapped secondary rectifier in forward or push-pull topology, providing dual-path current collection to common output rail. Use Value: Dual-diode integration reduces PCB footprint by 35% vs. discrete pair; shared cathode simplifies layout and minimizes parasitic inductance in high di/dt paths. |
| Automotive Body Control Module | Telecom Power Shelf |
Use Scenario: Reverse polarity protection and freewheeling in 12 V battery-fed motor drivers (e.g., window lift, seat actuator). IC Role / Device Role / Timing Role: Bidirectional protection rectifier: blocks reverse battery connection while conducting forward motor back-EMF during deceleration. Use Value: 150 A surge rating withstands motor stall currents; 150 °C junction rating ensures reliability under hood temperatures up to 125 °C ambient. | Use Scenario: Primary-side rectification in telecom -48 V input AC–DC front-end with hold-up capacitor charging. IC Role / Device Role / Timing Role: Freewheeling diode in active clamp forward converter, absorbing leakage inductance energy during main switch turn-off. Use Value: Avalanche capability (190 W @ 10 µs) eliminates need for external RCD snubber, reducing BOM count and board space in high-density power shelves. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-10CTQ040 | Same VRRM (40 V), IF(AV) = 2 × 5 A, but VF = 0.52 V @ 25 °C/5 A (higher conduction loss); TO-220AC package (non-isolated tab). | Lacks avalanche rating; unsuitable for unclamped inductive switching. | Prefer STPS10L40CT where avalanche robustness or lower VF at elevated temperature is required. |
| ON Semiconductor MBR1045CT | Higher VRRM (45 V), same IF(AV), but VF = 0.72 V @ 25 °C/5 A; no specified avalanche rating; TO-220AB package. | Designed for general-purpose rectification-not optimized for high-frequency SMPS efficiency or thermal coupling analysis. | Choose STPS10L40CT for high-efficiency, thermally coupled dual-diode operation in compact SMPS designs. |
Compared with VS-10CTQ040 and MBR1045CT, STPS10L40CT offers superior thermal coupling data, lower VF at operating temperature, and verified avalanche energy handling-making it the preferred choice for high-reliability, high-efficiency center-tapped converter designs where thermal interaction between diodes must be modeled.
Availability
STPS10L40CT is available at Aetrix Electronics and suitable for server VRMs, industrial DC–DC converters, automotive body control modules, and telecom power shelves requiring stable component supply and long-term manufacturability.
Supply support for STPS10L40CT 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, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
The STPS series targets high-efficiency power conversion, emphasizing low VF Schottky rectifiers with enhanced thermal and avalanche performance for next-generation SMPS and motor control systems.
FAQ
Is STPS10L40CT pin-compatible with STPS10L45CT?
No. STPS10L45CT has 45 V VRRM and different VF/thermal characteristics; although both use TO-220AB, their electrical parameters are not interchangeable without circuit revalidation. The 40 V rating of STPS10L40CT is optimized for ≤36 V systems, offering lower VF than higher-voltage variants.
Can STPS10L40CT be used in surface-mount designs?
No-it is only offered in through-hole TO-220AB (STPS10L40CT) and D²PAK (STPS10L40CG-TR) packages. The TO-220AB variant requires vertical mounting with heatsink contact; no SMT variant exists for this specific part number.
What is the significance of the "L" in STPS10L40CT?
The "L" denotes low forward voltage grade within ST's STPS family. It distinguishes this device from standard Schottky rectifiers (e.g., STPS10H40CT) by specifying tighter VF limits-0.36 V typ. @ 100 °C/5 A versus ~0.45 V-achieved via optimized metal-semiconductor interface processing.
Does STPS10L40CT require a heatsink in all applications?
Yes, for continuous operation above ~2 A per diode. With Rth(j-c) = 3.0 °C/W per diode and P = 0.33×IF(AV) + 0.026×IF²(RMS), even at 5 A average, junction temperature exceeds 100 °C without heatsinking. TO-220AB mounting torque (0.55 N·m) ensures optimal thermal transfer to external heatsink.
STPS10L40CT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io) (per Diode):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 530 mV @ 5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 200 µA @ 40 V
- Operating Temperature - Junction:
- 150°C (Max)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220
STPS10L40CT FAQ
1.How can I place an order for STPS10L40CT through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS10L40CT 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 STPS10L40CT reliable?
The price and inventory of STPS10L40CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS10L40CT is usually 5 days.
3.What payment methods are accepted for STPS10L40CT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS10L40CT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS10L40CT?
STPS10L40CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS10L40CT 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 STPS10L40CT?
For technical support, including STPS10L40CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS10L40CT requirements.
6.How does Aetrix verify that STPS10L40CT is sourced from the original manufacturer or authorized distributors?
All STPS10L40CT 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 STPS10L40CT meets industry standards.
7.What is the process for return or replacement of STPS10L40CT?
All STPS10L40CT units undergo pre-shipment inspection (PSI). If there is an issue with STPS10L40CT, 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 STPS10L40CT part is unused and in its original packaging.
Return procedure for STPS10L40CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS10L40CT Tags
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