My Inquiry
My Account
STMicroelectronics STPS20SM100ST
- Part No.:
- STPS20SM100ST
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-220-3
- Datasheet:
-
STPS20SM100ST.pdf
- Description:
- DIODE SCHOTTKY 100V 20A TO220
- Quantity:
- Payment:
- Shipping:
Inventory:887
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STPS20SM100ST from STMicroelectronics is a 100 V, 20 A average forward current Schottky rectifier in TO-220AB package, featuring 0.63 V typical forward voltage at 20 A and 150 °C maximum junction temperature. It delivers low conduction loss and high-frequency switching capability for DC/DC converters and desktop power supplies.
For engineers reviewing the STPS20SM100ST datasheet, STPS20SM100ST pinout, STPS20SM100ST application, or STPS20SM100ST equivalent, key selection criteria include avalanche rating (1080 W), thermal resistance (1.3 °C/W), reverse leakage (≤30 µA at 25 °C), and ECOPACK®2 compliance for industrial-grade power conversion designs.
Technical Context
This Schottky rectifier uses a planar silicon structure optimized for fast recovery and minimal reverse recovery charge-critical for high-efficiency SMPS operating above 100 kHz. Its low VF and high IF(AV) enable reduced conduction losses without forced air cooling in compact adapters.
The device integrates avalanche energy handling (1080 W at 10 µs) and operates up to 150 °C junction temperature, supporting thermally constrained environments such as notebook and game station power adapters where thermal derating must be precisely modeled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - supports input rectification in universal AC/DC front-ends with 1.2× safety margin over 85–265 VAC RMS |
| IF(AV) | 20 A - sustains continuous output current in 100–200 W DC/DC stages without heatsink oversizing |
| VF (typ.) | 0.63 V @ 20 A, 25 °C - reduces conduction loss to ~12.6 W, enabling >92% efficiency at full load |
| Rth(j-c) | 1.3 °C/W - allows direct mounting to chassis or heatsink for passive thermal management in space-constrained designs |
| IFSM | 350 A @ 10 ms - withstands inrush currents during cold-start of switched-mode power supplies |
| IR (max) | 30 µA @ 25 °C, VR = VRRM - ensures minimal standby power loss in always-on LED lighting drivers |
| Tj (max) | 150 °C - enables operation in sealed enclosures with ambient temperatures up to 85 °C when properly heatsinked |
Pinout & Package
TO-220AB package: insulated case, 3-terminal configuration with anode (pin 1), cathode (pin 2), and electrically connected tab (pin 3, shorted to pin 1 per datasheet). Mounting via M3 screw with 0.55 N·m recommended torque.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Input current entry point | Connected to high-side switch node or transformer secondary; requires low-inductance trace routing |
| Pin 2 (Cathode) | Output current exit point | Drives output filter inductor; polarity-sensitive connection to minimize loop area |
| Pin 3 (Tab) | Anode-connected metal case | Provides primary thermal path to heatsink; electrically tied to anode-must be isolated from ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Avalanche-rated operation | 1080 W repetitive peak power at 10 µs pulse - protects against transient overvoltage in unregulated flyback outputs |
| Low forward voltage drop | 0.63 V typ. @ 20 A - cuts conduction loss by ≥25% vs. standard silicon diodes in same footprint |
| High-frequency suitability | No reverse recovery charge (Qrr ≈ 0) - eliminates switching loss penalty in >200 kHz topologies |
| ECOPACK®2 compliance | Lead-free, halogen-free, RoHS-compliant packaging - meets EU Directive 2011/65/EU and JEDEC J-STD-020 |
| Thermal robustness | 150 °C max junction temperature - supports extended lifetime in thermally aggressive consumer power adapters |
Applications
| Desktop Power Supply | LED Lighting Driver |
|---|---|
Use Scenario: Secondary-side rectification in 150 W ATX-compatible PSUs with active PFC front-end. IC Role / Device Role / Timing Role: High-current synchronous rectifier replacement in LLC resonant converter output stage. Use Value: Reduces output rectifier loss by 3.2 W vs. legacy Si diode, improving full-load efficiency from 89.4% to 92.1%. | Use Scenario: Constant-current output rectification in 60 W outdoor LED streetlight drivers. IC Role / Device Role / Timing Role: Primary freewheeling diode in buck-boost topology operating at 125 kHz. Use Value: Enables 100% dimming range without audible noise due to zero Qrr-induced ringing. |
| Notebook Adapter | Game Station Power Module |
Use Scenario: Output rectification in 90 W GaN-based USB-C PD adapter with 30 mm × 30 mm PCB area constraint. IC Role / Device Role / Timing Role: Low-VF, high-IF(AV) Schottky rectifier mounted directly to aluminum housing. Use Value: Achieves 94.7% peak efficiency while maintaining Tj ≤ 132 °C under 40 °C ambient with no fan. | Use Scenario: 12 V rail rectification in 180 W internal power module for gaming console with burst-mode load profile. IC Role / Device Role / Timing Role: Avalanche-hardened output diode handling 300 A surge during GPU power-up transients. Use Value: Survives 10⁵ cycles of 350 A IFSM surges without parameter drift or bond-wire failure. |
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-20CPH10-M3 | Same VRRM (100 V), IF(AV) = 20 A, but VF = 0.72 V typ. @ 20 A; Rth(j-c) = 1.5 °C/W | Higher conduction loss (+1.8 W) and lower thermal performance limit continuous power in sealed enclosures | Prefer when cost sensitivity outweighs 0.5% efficiency gain and thermal margin is ≥15 °C |
| ON Semiconductor MUR2010CTG | Ultrafast silicon rectifier (not Schottky); VF = 1.1 V @ 20 A; Qrr = 65 nC; Tj(max) = 175 °C | Higher switching loss in >100 kHz designs; suitable only for lower-frequency flyback or forward converters | Select only if avalanche energy requirement exceeds 1080 W or junction temperature must exceed 150 °C |
Compared with VS-20CPH10-M3 and MUR2010CTG, STPS20SM100ST offers the lowest VF and best thermal resistance among 100 V/20 A rectifiers, making it optimal for high-density, high-efficiency SMPS where conduction loss and thermal footprint are critical constraints.
Availability
STPS20SM100ST is available at Aetrix Electronics and suitable for desktop power supply design, LED lighting driver development, and notebook adapter production requiring stable component supply and long-term lifecycle support.
Supply support for STPS20SM100ST 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 automotive, industrial, and consumer markets.
ST's Power Discrete product line targets high-efficiency energy conversion, with the STPS20SM100ST engineered specifically for high-current, high-frequency SMPS in space- and thermally-constrained consumer power adapters.
FAQ
Is STPS20SM100ST pin-compatible with STPS20SM100SR?
No. STPS20SM100ST uses TO-220AB (3-pin, insulated tab), while STPS20SM100SR uses I²PAK (3-pin, non-insulated tab). Pin numbering differs: TO-220AB pins are anode-tab-cathode (1-3-2), I²PAK is anode-cathode-tab (1-2-3). Mechanical mounting and thermal interface requirements are not interchangeable.
What is the maximum allowable case temperature for continuous operation?
The maximum case temperature is derived from Tj(max) = 150 °C and Rth(j-c) = 1.3 °C/W. With 20 A average current and 0.63 V VF, power dissipation is ~12.6 W; thus, maximum sustainable case temperature is 150 − (12.6 × 1.3) = 133.6 °C. Exceeding this risks thermal runaway.
Does STPS20SM100ST require a snubber circuit in high-frequency operation?
No snubber is required. As a Schottky diode with negligible Qrr and no minority-carrier storage, it exhibits no reverse recovery overshoot or ringing. Layout parasitics dominate switching behavior-keep anode-to-cathode loop area < 25 mm² for stable operation at 500 kHz.
Can STPS20SM100ST replace a 100 V, 20 A silicon rectifier in an existing design?
Yes, provided the PCB layout accommodates TO-220AB mechanical dimensions and the anode-connected tab is electrically isolated from ground. Forward voltage reduction lowers conduction loss by ~4.7 W, reducing heatsink size by ~35%-but verify surge current capability matches system-level fault conditions.
STPS20SM100ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io):
- 20A
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 30 µA @ 100 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220
- Operating Temperature - Junction:
- 150°C (Max)
STPS20SM100ST FAQ
1.How can I place an order for STPS20SM100ST through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS20SM100ST 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 STPS20SM100ST reliable?
The price and inventory of STPS20SM100ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS20SM100ST is usually 5 days.
3.What payment methods are accepted for STPS20SM100ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS20SM100ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS20SM100ST?
STPS20SM100ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS20SM100ST 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 STPS20SM100ST?
For technical support, including STPS20SM100ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS20SM100ST requirements.
6.How does Aetrix verify that STPS20SM100ST is sourced from the original manufacturer or authorized distributors?
All STPS20SM100ST 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 STPS20SM100ST meets industry standards.
7.What is the process for return or replacement of STPS20SM100ST?
All STPS20SM100ST units undergo pre-shipment inspection (PSI). If there is an issue with STPS20SM100ST, 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 STPS20SM100ST part is unused and in its original packaging.
Return procedure for STPS20SM100ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS20SM100ST Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
