My Inquiry
My Account
STMicroelectronics STPS20SM80CT
- Part No.:
- STPS20SM80CT
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-220-3
- Datasheet:
-
STPS20SM80CT.pdf
- Description:
- DIODE ARRAY SCHOT 80V 10A TO-220
- Quantity:
- Payment:
- Shipping:
Inventory:3,500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STPS20SM80CT from STMicroelectronics is a dual common-cathode Schottky rectifier in TO-220AB package, rated for 80 V reverse voltage and 2 × 10 A average forward current per diode, with typical forward voltage of 515 mV at 10 A and 125 °C junction temperature. It delivers low conduction loss and high avalanche ruggedness (100 V, 16.2 A) for high-frequency SMPS in compact AC/DC adapters.
For engineers reviewing the STPS20SM80CT datasheet, STPS20SM80CT pinout, STPS20SM80CT application, or STPS20SM80CT equivalent, this device is selected for efficiency-critical secondary-side rectification where thermal robustness, low VF, and insulated package safety are required in notebook, LCD TV, and game console power supplies.
Technical Context
This dual Schottky rectifier integrates two independent anodes sharing a common cathode terminal, enabling synchronous or interleaved rectification topologies. Its TO-220AB package provides direct heatsink mounting with 2.30 °C/W junction-to-case thermal resistance per diode and 1.55 °C/W total for both diodes.
The device features specified avalanche capability (PARM = 385 W, VARM = 100 V), low leakage (≤25 µA at 25 °C, ≤15 mA at 125 °C), and optimized VF–IR trade-off-enabling stable operation up to 175 °C maximum junction temperature without thermal runaway under proper heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 80 V - Maximum repetitive reverse blocking voltage per diode; defines safe operating margin against transient spikes in 12–24 V output rails. |
| IF(AV) | 2 × 10 A - Average forward current rating per diode at TC = 155 °C; supports 20 A total DC output in dual-phase or parallel configurations. |
| VF(typ.) | 515 mV @ 10 A, 125 °C - Confirmed forward drop under real operating temperature; enables <0.6 W conduction loss per diode at full load. |
| Tj(max.) | 175 °C - Maximum junction temperature; allows sustained operation in thermally constrained adapter enclosures without derating. |
| Rth(j-c) | 2.30 °C/W per diode - Junction-to-case thermal resistance; determines minimum heatsink size needed to maintain Tj ≤ 175 °C at 10 A continuous. |
| IR(max) | 15 mA @ 125 °C - Maximum reverse leakage per diode; ensures minimal standby power loss in high-efficiency no-load modes. |
| PARM | 385 W @ tp = 10 µs - Repetitive peak avalanche power; validates robustness against flyback voltage overshoot during MOSFET turn-off transitions. |
Pinout & Package
Package: TO-220AB - Insulated plastic case with metal tab (cathode-connected), screw-mount compatible, UL 94 V0 epoxy, 0.55 N·m recommended torque.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 (Lead 1) | Input terminal for Diode 1 | Connects to transformer secondary winding or switching node; carries full phase current in dual-output or interleaved designs. |
| Cathode (Tab) | Common output node | Electrically connected to metal tab; must be isolated from heatsink unless referenced to system ground; serves as shared return path. |
| Anode 2 (Lead 2) | Input terminal for Diode 2 | Independent input for second rectification path; enables dual-output or redundancy without external isolation components. |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-cathode configuration | Reduces PCB layout area and interconnect inductance vs. discrete diodes; simplifies thermal management with single heatsink interface. |
| Avalanche-rated structure | Withstands 100 V, 16.2 A transient pulses (tp < 1 µs); eliminates need for external snubbers in flyback or LLC secondary-side circuits. |
| High-temperature junction capability | Rated for continuous operation up to 175 °C; maintains reliability in sealed adapters where ambient exceeds 85 °C. |
| Optimized VF–IR trade-off | 515 mV VF at 10 A/125 °C with only 15 mA IR at same condition; balances efficiency and leakage in high-density power supplies. |
Applications
| Notebook AC/DC Adapter | LCD TV Power Supply |
|---|---|
|
Use Scenario: Secondary-side synchronous rectification in 19–20 V, 3–6 A output stage of ultra-thin notebook adapters. IC Role / Device Role / Timing Role: Dual-anode Schottky rectifier replacing two discrete diodes; conducts during transformer secondary voltage polarity window. Use Value: Reduces conduction loss by ~35% vs. standard silicon diodes, enabling >90% efficiency at light load while maintaining thermal headroom. |
Use Scenario: Dual-output rectification for main 12 V and standby 5 V rails in integrated LCD TV power boards. IC Role / Device Role / Timing Role: Common-cathode dual diode providing independent current paths for two regulated outputs sharing one transformer winding. Use Value: Eliminates cross-regulation issues and reduces component count versus separate diodes, improving BOM cost and assembly yield. |
| Game Console Power Adapter | Desktop PC External PSU |
|
Use Scenario: High-current 12 V output rectification in compact, fanless game station adapters handling burst loads up to 15 A. IC Role / Device Role / Timing Role: Avalanche-rugged Schottky rectifier absorbing flyback energy during MOSFET commutation in quasi-resonant topology. Use Value: Withstands repetitive 385 W avalanche pulses without degradation, extending service life under dynamic gaming workloads. |
Use Scenario: Primary-secondary isolation boundary rectification in modular desktop external PSUs delivering 20 A at 12 V. IC Role / Device Role / Timing Role: Dual-diode device used in parallel configuration across two transformer secondary windings for current sharing. Use Value: Enables balanced thermal distribution across both diodes via matched VF characteristics, preventing hot-spotting on single heatsink. |
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-20CPH08-M3 | Same 80 V VRRM, 2 × 10 A IF(AV), but TO-247AC package; Rth(j-c) = 1.8 °C/W per diode; VF = 570 mV @ 10 A/125 °C. | Higher thermal performance but larger footprint; requires different heatsink interface and mounting hardware. | Select when lower thermal resistance is critical and board space permits TO-247 layout. |
| ON Semiconductor MBR2080CT | 80 V VRRM, 2 × 10 A IF(AV), TO-220AB; VF = 750 mV @ 10 A/25 °C; no specified avalanche rating; Tj(max.) = 150 °C. | Lacks avalanche ruggedness and high-temperature rating; higher VF increases conduction loss by ~180 mW per diode at full load. | Select only for cost-sensitive, non-avalanche-prone designs with ambient <60 °C and no flyback transients. |
Compared with VS-20CPH08-M3 and MBR2080CT, STPS20SM80CT uniquely combines TO-220AB form factor, 175 °C junction rating, and validated 385 W avalanche capability-making it optimal for compact, high-reliability adapters where thermal and transient margins are constrained.
Availability
STPS20SM80CT is available at Aetrix Electronics and suitable for notebook AC/DC adapters, LCD TV power supplies, and game console external PSUs requiring stable component supply, consistent thermal performance, and long-term industrial lifecycle support.
Supply support for STPS20SM80CT 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, power, MCU, and sensor solutions for automotive, industrial, and consumer markets.
ST's Power Schottky Rectifier product line targets high-efficiency, high-reliability secondary-side rectification in compact switch-mode power supplies-emphasizing low VF, high Tj, and rugged avalanche behavior for next-generation adapters.
FAQ
Is STPS20SM80CT RoHS-compliant and halogen-free?
Yes. STPS20SM80CT meets RoHS Directive 2011/65/EU and is halogen-free per ST's ECOPACK® specifications. The TO-220AB package uses UL 94 V0 epoxy and complies with JEDEC J-STD-020 moisture sensitivity level 1, with no lead finish restrictions.
Can STPS20SM80CT be used in parallel with another identical device?
No. Parallel operation is not recommended due to mismatched forward voltage characteristics between units, which causes current imbalance and potential thermal runaway. For higher current, use a single higher-rated device or redesign with interleaved windings feeding separate anodes.
What is the maximum allowable heatsink temperature for continuous 20 A operation?
At 20 A total (10 A per diode), with Rth(j-c) = 2.30 °C/W and Tj(max.) = 175 °C, the maximum heatsink temperature is 152 °C (175 − 10 × 2.30). In practice, derate to ≤130 °C heatsink temperature to ensure margin under transient loads and aging effects.
Does STPS20SM80CT require a gate drive or control signal?
No. STPS20SM80CT is a passive Schottky rectifier with no control inputs. It conducts automatically when anode voltage exceeds cathode voltage by >0.5 V. No driver circuitry, timing signals, or biasing is needed-unlike active synchronous rectifiers.
STPS20SM80CT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 80 V
- Current - Average Rectified (Io) (per Diode):
- 10A
- Voltage - Forward (Vf) (Max) @ If:
- 780 mV @ 10 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 25 µA @ 80 V
- Operating Temperature - Junction:
- 175°C (Max)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220
STPS20SM80CT FAQ
1.How can I place an order for STPS20SM80CT through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS20SM80CT 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 STPS20SM80CT reliable?
The price and inventory of STPS20SM80CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS20SM80CT is usually 5 days.
3.What payment methods are accepted for STPS20SM80CT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS20SM80CT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS20SM80CT?
STPS20SM80CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS20SM80CT 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 STPS20SM80CT?
For technical support, including STPS20SM80CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS20SM80CT requirements.
6.How does Aetrix verify that STPS20SM80CT is sourced from the original manufacturer or authorized distributors?
All STPS20SM80CT 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 STPS20SM80CT meets industry standards.
7.What is the process for return or replacement of STPS20SM80CT?
All STPS20SM80CT units undergo pre-shipment inspection (PSI). If there is an issue with STPS20SM80CT, 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 STPS20SM80CT part is unused and in its original packaging.
Return procedure for STPS20SM80CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS20SM80CT Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
-
BAV99,215
Nexperia USA Inc.
-
BAT54SLT1G
onsemi
-
BAV70LT1G
onsemi
-
BAT54CLT1G
onsemi
-
BAT54S-7-F
Diodes Incorporated
-
BAV99LT1G
onsemi
-
BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
-
MMBD1503-TP
Micro Commercial Co
-
BAV99WT1G
onsemi
Tech Hub
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…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
