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STMicroelectronics STPS30SM100ST
- Part No.:
- STPS30SM100ST
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-220-3
- Datasheet:
-
STPS30SM100ST.pdf
- Description:
- DIODE SCHOTTKY 100V 30A TO220
- Quantity:
- Payment:
- Shipping:
Inventory:1,142
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Product details
Overview
STPS30SM100ST from STMicroelectronics is a 100 V, 30 A average forward current Schottky rectifier in TO-220AB package, optimized for high-frequency switch-mode power supplies. It delivers low forward voltage drop (0.63 V typ. at 25 °C, 30 A), avalanche-rated operation, and thermal stability up to 150 °C junction temperature-enabling high-efficiency performance in notebook and game station AC/DC adapters.
For engineers reviewing the STPS30SM100ST datasheet, STPS30SM100ST pinout, STPS30SM100ST application, or STPS30SM100ST equivalent, key selection criteria include its 1 °C/W junction-to-case thermal resistance, 400 A non-repetitive surge rating, ECOPACK®2 compliance, and validated use in DC/DC converters where low conduction loss and fast recovery are critical.
Technical Context
This single-diode Schottky rectifier operates without minority-carrier storage, enabling zero reverse recovery time and minimal switching losses in high-frequency topologies. Its design targets continuous conduction mode (CCM) and discontinuous conduction mode (DCM) operation in secondary-side rectification of isolated flyback and forward converters.
The device's avalanche energy rating (1545 W at 10 µs, Tj = 125 °C) supports robust transient handling during output short-circuit or overload events. Thermal management relies on direct case-to-heatsink conduction via the TO-220AB metal tab (terminal 3), with Rth(j-c) = 1 °C/W specified under controlled mounting conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Maximum repetitive reverse blocking voltage; defines safe operating range in 12–48 V output DC/DC stages. |
| IF(AV) | 30 A - Average forward current at Tc = 125 °C; enables compact adapter designs without forced air cooling. |
| VF (typ.) | 0.63 V @ 25 °C, 30 A - Low conduction loss reduces heat generation and improves system efficiency above 90% at full load. |
| Tj (max.) | 150 °C - Maximum junction temperature; allows reliable operation in sealed enclosures with limited airflow. |
| Rth(j-c) | 1 °C/W - Junction-to-case thermal resistance; requires ≥10 cm² heatsink area for 30 A continuous operation at ambient ≤60 °C. |
| IFSM | 400 A @ 10 ms - Non-repetitive surge current capability; withstands inrush and fault transients in SMPS startup. |
| IR (max.) | 45 mA @ 125 °C, VR = VRRM - Reverse leakage limits standby power loss in energy-efficient adapters. |
Pinout & Package
Package: TO-220AB - Insulated plastic case with metal tab (terminal 3) for heatsinking and electrical connection. Mounting torque: 0.55 N·m (recommended), max 0.70 N·m. UL 94 V0 compliant epoxy.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Input current entry point | Connected to transformer secondary or switching node; carries full load current into diode. |
| 2 (Cathode) | Output current exit point | Connected to output capacitor and load; polarity-sensitive for correct DC polarity delivery. |
| 3 (Case/Tab) | Junction-to-heatsink thermal path & cathode connection | Electrically tied to cathode (shorted terminals 2 and 3 per datasheet); must be electrically isolated from chassis unless circuit design permits common-cathode grounding. |
Key Features
| Feature | Design Value |
|---|---|
| High current capability | 30 A average forward current supports >150 W output power in compact AC/DC adapters without parallel devices. |
| Avalanche rated | 1545 W peak avalanche power (10 µs pulse, Tj = 125 °C) provides intrinsic overvoltage ruggedness during flyback spike events. |
| Low forward voltage drop | 0.63 V typical VF at 30 A reduces conduction loss to ~18.9 W, lowering thermal stress vs. silicon diodes (~1.1 V). |
| ECOPACK®2 compliance | Meets RoHS and halogen-free requirements; suitable for consumer electronics with strict environmental certifications. |
Applications
| Desktop Power Supply | LED Lighting Driver |
|---|---|
Use Scenario: Secondary-side rectification in 200–300 W ATX-compatible PSUs operating at 100–500 kHz switching frequency. IC Role / Device Role / Timing Role: Unidirectional current steering diode converting high-frequency AC from transformer secondary to regulated DC bus. Use Value: Low VF minimizes 12 V rail conduction loss; TO-220AB tab enables direct bolt-on heatsinking to PSU chassis. | Use Scenario: Constant-current output stage in industrial LED drivers powering high-brightness arrays (e.g., streetlights, stadium lighting). IC Role / Device Role / Timing Role: Synchronous rectifier replacement in quasi-resonant flyback topology, improving efficiency at light-load dimming conditions. Use Value: 150 °C Tj rating ensures stable operation under enclosed thermal conditions; low IR prevents leakage-induced current drift in precision CC regulation. |
| Notebook Adapter | Game Station Power Brick |
Use Scenario: 65–90 W AC/DC adapter for ultrabooks, requiring >90% efficiency across 10–100% load range. IC Role / Device Role / Timing Role: Output rectifier in active-clamp forward converter, handling 20 A continuous output current. Use Value: 0.63 V VF directly contributes to <1.5 W conduction loss at full load, enabling passive cooling and compact form factor. | Use Scenario: 120–150 W external power supply for gaming consoles, subject to repeated thermal cycling and transient surges. IC Role / Device Role / Timing Role: Main output rectifier in dual-switch forward topology with synchronous control timing reference. Use Value: Avalanche rating absorbs reflected transformer spikes during sudden load drops; TO-220AB mechanical robustness withstands field vibration and thermal stress. |
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-30CPH01-M3 | Same VRRM (100 V), IF(AV) = 30 A, but VF = 0.72 V (typ. @ 30 A, 25 °C); Rth(j-c) = 1.2 °C/W. | Higher conduction loss increases thermal demand; less suitable for sealed, fanless adapters. | Select when legacy Vishay footprint compatibility is required and 0.09 V higher VF is acceptable. |
| ON Semiconductor MBR30100CT | Dual-diode configuration (common-cathode); VF = 0.75 V (typ. @ 30 A); TO-220AB package with isolated tab. | Not a drop-in replacement due to dual-diode pinout; requires PCB redesign for single-diode use. | Choose only if dual-diode topology (e.g., center-tapped secondary) is part of the design. |
Compared with VS-30CPH01-M3 and MBR30100CT, STPS30SM100ST offers the lowest VF and best thermal resistance among TO-220AB 100 V/30 A Schottkys, making it optimal for thermally constrained, high-efficiency AC/DC adapters where single-diode rectification is used.
Availability
STPS30SM100ST is available at Aetrix Electronics and suitable for desktop power supplies, LED lighting drivers, and notebook adapters requiring stable component supply and long-term manufacturability.
Supply support for STPS30SM100ST 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 microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.
The STPSx series targets high-efficiency power conversion, with STPS30SM100ST specifically engineered for high-current, high-frequency secondary-side rectification in compact AC/DC adapters and open-frame SMPS.
FAQ
Is STPS30SM100ST pin-compatible with other TO-220AB Schottky rectifiers?
Yes-STPS30SM100ST uses standard TO-220AB pinout (anode-pin1, cathode-pin2, tab/case-pin3), matching industry-standard footprints. However, its cathode-connected tab requires electrical isolation unless the system design grounds the cathode directly to chassis. Always verify mounting hole alignment and creepage distance against your PCB layout.
What is the maximum recommended PCB copper area for thermal relief with STPS30SM100ST?
For continuous 30 A operation at Tc = 125 °C, ST recommends ≥10 cm² of 2-oz copper connected to the tab (terminal 3) with ≥4 thermal vias (0.3 mm diameter, filled) to an internal ground plane. This achieves the specified 1 °C/W Rth(j-c) and prevents localized hot spots exceeding 150 °C junction temperature.
Does STPS30SM100ST require a snubber circuit in flyback applications?
No snubber is required for normal operation due to zero reverse recovery charge. However, a small RC snubber (e.g., 100 Ω + 100 pF) across anode–cathode may suppress high-frequency ringing caused by transformer leakage inductance and PCB parasitics-especially at >300 kHz switching frequencies where EMI compliance is critical.
Can STPS30SM100ST replace a 100 V, 20 A Schottky in an existing design?
Yes-with derating considerations. Its 30 A IF(AV) rating allows direct upgrade for higher output current or improved thermal margin. Verify that the PCB pad layout supports TO-220AB mechanical dimensions and that the heatsink interface remains effective at the increased power dissipation level (up to ~18.9 W vs. ~12.6 W for 20 A at same VF).
STPS30SM100ST 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):
- 30A
- Voltage - Forward (Vf) (Max) @ If:
- 870 mV @ 30 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 45 µA @ 100 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220
- Operating Temperature - Junction:
- 150°C (Max)
STPS30SM100ST FAQ
1.How can I place an order for STPS30SM100ST through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS30SM100ST 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 STPS30SM100ST reliable?
The price and inventory of STPS30SM100ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS30SM100ST is usually 5 days.
3.What payment methods are accepted for STPS30SM100ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS30SM100ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS30SM100ST?
STPS30SM100ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS30SM100ST 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 STPS30SM100ST?
For technical support, including STPS30SM100ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS30SM100ST requirements.
6.How does Aetrix verify that STPS30SM100ST is sourced from the original manufacturer or authorized distributors?
All STPS30SM100ST 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 STPS30SM100ST meets industry standards.
7.What is the process for return or replacement of STPS30SM100ST?
All STPS30SM100ST units undergo pre-shipment inspection (PSI). If there is an issue with STPS30SM100ST, 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 STPS30SM100ST part is unused and in its original packaging.
Return procedure for STPS30SM100ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS30SM100ST Tags
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BAV21W-7-F
Diodes Incorporated
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