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STMicroelectronics STPS30SM120SFP
- Part No.:
- STPS30SM120SFP
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-220-3 Full Pack
- Datasheet:
-
STPS30SM120SFP.pdf
- Description:
- DIODE SCHOTT 120V 30A TO220FPAB
- Quantity:
- Payment:
- Shipping:
Inventory:46
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Product details
Overview
STPS30SM120SFP from STMicroelectronics is a 120 V, 30 A average forward current Schottky rectifier in insulated TO-220FPAB package, featuring 0.47 V typical forward voltage at 125 °C and 5 A, avalanche-rated operation, and 2000 VRMS insulation. It serves as a high-efficiency output rectifier in notebook adapters, DC/DC converters, and LED lighting power stages.
For engineers reviewing the STPS30SM120SFP datasheet, STPS30SM120SFP pinout, STPS30SM120SFP application, or STPS30SM120SFP equivalent, key selection criteria include reverse voltage rating (120 V), thermal resistance (Rth(j-c) = 4 °C/W), insulated package safety, low VF conduction loss, and avalanche energy capability (1200 W at 10 µs).
Technical Context
This Schottky diode uses platinum-doped silicon to achieve low forward voltage and fast recovery without minority-carrier storage. Its 120 V VRRM rating targets mid-voltage SMPS outputs where SiC alternatives are cost-prohibitive.
The TO-220FPAB package integrates an electrically isolated metal tab rated for 2000 VRMS, enabling direct heatsink mounting without insulating washers while maintaining creepage/clearance compliance in AC/DC adapter secondary-side rectification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 120 V - supports 90–100 VDC output rails with margin against transient spikes in 120 VAC-input adapters |
| IF(AV) | 30 A - delivers sustained output current for 65–90 W notebook adapters under continuous load |
| VF (typ) | 0.47 V @ 125 °C, 5 A - reduces conduction loss to ~2.35 W per diode at light load, improving light-load efficiency |
| Rth(j-c) | 4 °C/W - requires ≥10 cm² aluminum heatsink for 30 A operation at Tj ≤ 150 °C in sealed enclosures |
| IFSM | 240 A @ 10 ms - withstands inrush currents during cold-start of DC/DC converters with large output capacitors |
| IR (max) | 50 mA @ 125 °C, VRRM - limits standby leakage in multi-rail systems where reverse bias persists across unused outputs |
Pinout & Package
TO-220FPAB package features three terminals: Anode (pin 1), Cathode (pin 2), and electrically isolated metal tab (pin 3, connected to cathode internally but insulated from PCB mount surface). The insulated tab enables safe, low-thermal-resistance heatsinking without dielectric pads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input node for forward conduction path | Connects to transformer secondary or switching node; carries full load current into cathode |
| Cathode | Output node for forward conduction path | Routes rectified DC to output capacitor; common connection point for parallel diodes |
| Metal tab | Thermal interface / cathode reference | Electrically isolated (2000 VRMS) but thermally coupled to cathode; mounts directly to heatsink |
Key Features
| Feature | Design Value |
|---|---|
| Avalanche-rated operation | 1200 W peak avalanche power at 10 µs pulse enables robustness against inductive switching transients in flyback/LLC secondaries |
| Low VF at high temperature | 0.68 V max @ 125 °C, 30 A ensures <1.5% efficiency penalty vs. room-temp VF in thermally constrained adapters |
| Insulated TO-220FPAB package | 2000 VRMS isolation eliminates need for mica washers or silicone pads, reducing assembly cost and thermal interface resistance |
| ECOPACK®2 compliance | Meets RoHS, halogen-free, and lead-free soldering requirements for global consumer electronics certifications (CE, UL, ENERGY STAR) |
Applications
| Notebook Adapter Secondary Rectifier | LED Driver Output Stage |
|---|---|
Use Scenario: 65–90 W AC/DC adapter for ultrabooks with dual USB-C PD outputs. IC Role / Device Role / Timing Role: Primary output rectifier converting transformer secondary AC to regulated DC bus. Use Value: 0.47 V VF minimizes heat generation in compact enclosures; 30 A IF(AV) supports dynamic load steps up to 4 A/µs without derating. | Use Scenario: Constant-current LED driver for commercial downlights with 48 V output and 1.5 A channel current. IC Role / Device Role / Timing Role: Synchronous rectifier in secondary-side synchronous buck topology. Use Value: Low IR (≤50 mA @ 125 °C) prevents false triggering of overvoltage protection during thermal cycling; TO-220FPAB isolation simplifies PCB layout near high-side gate drivers. |
| Desktop PC ATX +12 V Rail | Industrial DC/DC Converter |
Use Scenario: +12 V output stage in 500 W ATX power supply with active PFC front-end. IC Role / Device Role / Timing Role: Freewheeling diode in LLC resonant converter secondary. Use Value: Avalanche rating absorbs reflected energy during zero-voltage switching transitions; Rth(j-c) = 4 °C/W enables use with shared heatsink alongside MOSFETs. | Use Scenario: 24 V input, 5 V/20 A isolated DC/DC module for factory automation I/O controllers. IC Role / Device Role / Timing Role: Output rectifier in forward converter with center-tapped secondary. Use Value: 150 °C max junction temperature supports operation in 70 °C ambient industrial cabinets; ECOPACK®2 compliance meets IEC 62368-1 material requirements. |
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-30CPH12-M3 | Same VRRM (120 V), IF(AV) (30 A), TO-220AC package (non-insulated); Rth(j-c) = 1.5 °C/W | Requires insulating hardware for heatsink mounting; better thermal performance but higher assembly cost | Select when thermal budget is tighter and isolation can be managed externally |
| ON Semiconductor MBR30H120CT | 120 V, 30 A dual common-cathode Schottky; TO-220AB package; VF = 0.75 V typ @ 125 °C, 15 A | Higher VF increases conduction loss by ~35% at full load; dual-diode configuration suits dual-output designs | Select for dual-rail outputs or where lower cost outweighs efficiency loss |
Compared with VS-30CPH12-M3, STPS30SM120SFP trades thermal performance for simplified mechanical integration; versus MBR30H120CT, it delivers superior efficiency at high temperature but lacks dual-diode flexibility.
Availability
STPS30SM120SFP is available at Aetrix Electronics and suitable for notebook adapters, LED lighting drivers, industrial DC/DC converters, and desktop PC power supplies requiring stable component supply and certified insulation.
Supply support for STPS30SM120SFP 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 automotive, industrial, and consumer markets.
The STPS series targets high-efficiency, high-reliability power conversion in cost-sensitive consumer and industrial power supplies, emphasizing low VF, avalanche ruggedness, and eco-compliant packaging.
FAQ
What is the maximum allowable case temperature for continuous operation?
The maximum operating junction temperature is +150 °C. With Rth(j-c) = 4 °C/W, the case temperature must remain ≤110 °C at 30 A to maintain 40 °C thermal margin. This requires a heatsink with ≤27.5 °C/W total thermal resistance (including interface and ambient).
Can STPS30SM120SFP replace a standard TO-220AB diode in existing layouts?
No - the TO-220FPAB footprint differs mechanically: it adds isolation layers and modifies tab dimensions. Mounting hole centers and tab cutouts are incompatible with TO-220AB PCB footprints. A board redesign is required to accommodate its insulated tab geometry and torque specifications.
How does the avalanche rating impact reliability in flyback converters?
The 1200 W avalanche power rating at 10 µs allows the diode to absorb reflected energy during MOSFET turn-off without failure. In flyback designs with poor snubber design or variable loads, this prevents cumulative junction degradation and extends MTBF beyond 100,000 hours at rated conditions.
Is the 2000 VRMS insulation suitable for reinforced insulation per IEC 62368-1?
Yes - the 2000 VRMS isolation meets reinforced insulation requirements for primary-to-secondary barriers in Class II AC/DC adapters rated ≤250 VAC input. ST's certification documentation confirms compliance with IEC 62368-1 Annex G test conditions for TO-220FPAB construction.
STPS30SM120SFP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- ECOPACK®2
- Package/Case:
- TO-220-3 Full Pack
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 120 V
- Current - Average Rectified (Io):
- 30A
- Voltage - Forward (Vf) (Max) @ If:
- 950 mV @ 30 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 275 µA @ 120 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220FPAB
- Operating Temperature - Junction:
- 150°C (Max)
STPS30SM120SFP FAQ
1.How can I place an order for STPS30SM120SFP through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS30SM120SFP 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 STPS30SM120SFP reliable?
The price and inventory of STPS30SM120SFP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS30SM120SFP is usually 5 days.
3.What payment methods are accepted for STPS30SM120SFP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS30SM120SFP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS30SM120SFP?
STPS30SM120SFP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS30SM120SFP 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 STPS30SM120SFP?
For technical support, including STPS30SM120SFP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS30SM120SFP requirements.
6.How does Aetrix verify that STPS30SM120SFP is sourced from the original manufacturer or authorized distributors?
All STPS30SM120SFP 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 STPS30SM120SFP meets industry standards.
7.What is the process for return or replacement of STPS30SM120SFP?
All STPS30SM120SFP units undergo pre-shipment inspection (PSI). If there is an issue with STPS30SM120SFP, 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 STPS30SM120SFP part is unused and in its original packaging.
Return procedure for STPS30SM120SFP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS30SM120SFP Tags
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