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STMicroelectronics STPS20SM60ST
- Part No.:
- STPS20SM60ST
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-220-3
- Datasheet:
-
STPS20SM60ST.pdf
- Description:
- DIODE SCHOTTKY 60V 20A TO220
- Quantity:
- Payment:
- Shipping:
Inventory:6,340
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Product details
Overview
STPS20SM60ST from STMicroelectronics is a single silicon Schottky power rectifier in TO-220AB package, rated for 20 A average forward current and 60 V repetitive peak reverse voltage, with typical forward voltage drop of 0.410 V at 125 °C and 20 A. It is avalanche-rated (80 V, 1 µs), thermally optimized for conduction cooling, and deployed in high-frequency AC/DC adapters for notebooks and desktop PCs to minimize conduction losses and improve efficiency across load ranges.
For engineers reviewing the STPS20SM60ST datasheet, STPS20SM60ST pinout, STPS20SM60ST application, or STPS20SM60ST equivalent, key selection criteria include its low VF at high junction temperature, 150 °C max operating junction temperature, avalanche energy capability (18.4 kW pulse), thermal resistance (1.3 °C/W j-c), and TO-220AB mechanical compatibility with standard heatsink mounting.
Technical Context
This Schottky diode operates without minority-carrier storage, enabling zero reverse recovery time and high-frequency switching suitability in SMPS secondary-side rectification. Its metal–semiconductor junction delivers low forward voltage and high leakage tolerance up to 150 °C, supported by a robust avalanche rating validated per AN1768 and AN2025.
The device's thermal design centers on junction-to-case conduction (Rth(j-c) = 1.3 °C/W), requiring direct mechanical mounting to heatsinks with 0.4–0.6 N·m torque. Absolute ratings specify 400 A non-repetitive surge current (10 ms sine) and 60 A RMS forward current under defined thermal conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) | 20 A - maximum continuous DC forward current at Tc = 130 °C, defining steady-state power delivery capability |
| VRRM | 60 V - peak repetitive reverse blocking voltage, setting maximum input/output voltage margin in adapter designs |
| VF (typ) | 0.410 V @ 20 A, 125 °C - low conduction loss enabling >90% efficiency at full load in 19 V output adapters |
| Tj (max) | 150 °C - maximum junction temperature, allowing operation in compact, thermally constrained enclosures |
| Rth(j-c) | 1.3 °C/W - thermal resistance from junction to case, enabling precise heatsink sizing for 20 A continuous operation |
| PARM | 18400 W @ tp = 1 µs - peak avalanche power rating, supporting transient overvoltage resilience without failure |
| IAR | 69 A - maximum repetitive avalanche current, defining safe clamping capability during inductive switching events |
Pinout & Package
Package: TO-220AB - 3-pin through-hole package with isolated tab (pin 3), designed for mechanical mounting to heatsinks and compliant with UL94 V0 epoxy. Tab is electrically connected to cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Main current entry point; connects to transformer secondary or switching node in flyback/LLC topologies |
| Pin 2 | Cathode | Main current exit point; ties to output capacitor and ground return path in DC output stage |
| Pin 3 (Tab) | Cathode | Electrically tied to Pin 2; provides low-inductance, high-current thermal path to heatsink and system ground |
Key Features
| Feature | Design Value |
|---|---|
| Avalanche-rated operation | Validated 80 V, 1 µs repetitive avalanche capability per AN1768, enabling robustness against voltage transients in unregulated inputs |
| Low VF at elevated temperature | 0.410 V typ. @ 125 °C/20 A - reduces conduction loss drift under thermal stress, critical for sustained adapter performance |
| High-frequency suitability | No reverse recovery charge (Qrr ≈ 0) - eliminates switching loss and EMI associated with BJT or fast recovery diodes |
| Thermally optimized package | TO-220AB with isolated tab and 1.3 °C/W Rth(j-c) - enables direct heatsink coupling without insulating washers, simplifying thermal management |
| ECOPACK® compliance | Meets RoHS and halogen-free requirements per ST's ECOPACK® Grade 2, supporting environmental compliance in global OEM shipments |
Applications
| Notebook AC/DC Adapters | Desktop PC Power Supplies |
|---|---|
Use Scenario: 19 V, 3–6 A output stage in compact external adapters with tight thermal envelopes. IC Role / Device Role / Timing Role: Secondary-side synchronous rectification replacement - functions as low-loss freewheeling diode during high-frequency PWM cycles. Use Value: 0.41 V VF at 125 °C reduces conduction loss by ~35% vs. standard fast recovery diodes, directly improving light-load efficiency and reducing heatsink size. | Use Scenario: +12 V rail rectification in ATX PSUs with multi-phase LLC control and 50–100 kHz switching. IC Role / Device Role / Timing Role: Output rectifier in resonant converter secondary - handles continuous 20 A DC current with minimal voltage overshoot during turn-off. Use Value: Avalanche rating absorbs reflected leakage energy during MOSFET turn-off, eliminating need for snubbers and reducing component count. |
| Game Console Power Adapters | USB-C PD Reference Designs |
Use Scenario: 20 V, 5 A output for high-power gaming peripherals requiring stable voltage under dynamic load steps. IC Role / Device Role / Timing Role: Main output rectifier in quasi-resonant flyback - conducts during 50–75% duty cycle with <1 µs transition times. Use Value: Zero Qrr prevents reverse recovery spikes that interfere with primary-side ZVS, preserving soft-switching integrity and EMI performance. | Use Scenario: 20 V PPS (Programmable Power Supply) output stage in 65 W USB-C PD reference designs. IC Role / Device Role / Timing Role: Fixed-output rectifier in constant-voltage mode - maintains regulation during 0–3 A load transitions with minimal thermal rise. Use Value: 150 °C Tj(max) and 1.3 °C/W Rth(j-c) allow operation at 95% derated current in 50 mm² copper area, meeting IEC 62368-1 surface temperature limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-20CPH06 | Same 20 A/60 V rating; VF = 0.52 V @ 20 A/125 °C; Rth(j-c) = 1.5 °C/W; TO-220AC (non-isolated tab) | Requires insulating pad for heatsink mounting; higher VF increases conduction loss by ~27% at full load | Select when cost sensitivity outweighs thermal efficiency; verify isolation requirements for chassis-grounded heatsinks |
| ON Semiconductor MBR2060CT | Dual common-cathode die in TO-220AB; VF = 0.65 V @ 20 A/25 °C; no avalanche rating; Tj(max) = 175 °C | Higher VF degrades efficiency at high ambient; lacks transient clamping capability for unclamped inductive loads | Prefer only in cost-driven, non-avalanche-critical applications where dual-diode topology matches layout |
Compared with VS-20CPH06 and MBR2060CT, STPS20SM60ST offers superior thermal performance (1.3 vs. 1.5 °C/W), lower VF at operating temperature, and verified avalanche ruggedness-making it optimal for high-reliability, high-efficiency adapter designs where thermal headroom and transient immunity are prioritized.
Availability
STPS20SM60ST is available at Aetrix Electronics and suitable for notebook adapters, desktop PC power supplies, game console chargers, and USB-C PD reference designs requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for STPS20SM60ST 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 STPSx series targets high-efficiency, high-reliability power conversion, with STPS20SM60ST specifically engineered for SMPS secondary-side rectification where low VF, thermal robustness, and transient resilience are critical.
FAQ
Is STPS20SM60ST pin-compatible with other TO-220AB Schottky diodes?
Yes - STPS20SM60ST uses standard TO-220AB pinout (anode–cathode–cathode tab) and shares identical mechanical dimensions with industry-standard 3-pin TO-220AB rectifiers. Mounting hole spacing, tab diameter (3.8 mm), and lead pitch match JEDEC MS-001BA, enabling direct PCB footprint reuse.
What is the maximum recommended heatsink thermal resistance for 20 A continuous operation?
At 20 A IF(AV) and 130 °C case temperature, power dissipation is ~10.2 W (using P = 0.430 × IF + 0.0075 × IF²). With Rth(j-c) = 1.3 °C/W and max Tj = 150 °C, allowable Rth(c-sink) ≤ 0.7 °C/W to maintain 20 °C safety margin - achievable with 25 cm² aluminum heatsink and thermal grease.
Does STPS20SM60ST require a gate driver or external control circuitry?
No - STPS20SM60ST is a passive two-terminal Schottky rectifier with no control pins or bias requirements. It operates autonomously based on forward/reverse voltage polarity and requires no drivers, timing signals, or auxiliary power, unlike active synchronous rectifiers.
Can STPS20SM60ST be used in automotive infotainment power supplies?
STPS20SM60ST is not qualified to AEC-Q101 and lacks automotive-specific validation (e.g., extended temperature cycling, humidity testing). While its 150 °C Tj(max) exceeds typical cabin ambient, ST explicitly states non-automotive use unless designated "automotive grade"; industrial-grade alternatives like STPS20SM60CG are preferred for vehicle applications.
STPS20SM60ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 60 V
- Current - Average Rectified (Io):
- 20A
- Voltage - Forward (Vf) (Max) @ If:
- 630 mV @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 85 µA @ 60 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220
- Operating Temperature - Junction:
- 150°C (Max)
STPS20SM60ST FAQ
1.How can I place an order for STPS20SM60ST through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS20SM60ST 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 STPS20SM60ST reliable?
The price and inventory of STPS20SM60ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS20SM60ST is usually 5 days.
3.What payment methods are accepted for STPS20SM60ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS20SM60ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS20SM60ST?
STPS20SM60ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS20SM60ST 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 STPS20SM60ST?
For technical support, including STPS20SM60ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS20SM60ST requirements.
6.How does Aetrix verify that STPS20SM60ST is sourced from the original manufacturer or authorized distributors?
All STPS20SM60ST 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 STPS20SM60ST meets industry standards.
7.What is the process for return or replacement of STPS20SM60ST?
All STPS20SM60ST units undergo pre-shipment inspection (PSI). If there is an issue with STPS20SM60ST, 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 STPS20SM60ST part is unused and in its original packaging.
Return procedure for STPS20SM60ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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