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STMicroelectronics STPS10120CT
- Part No.:
- STPS10120CT
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-220-3
- Datasheet:
-
STPS10120CT.pdf
- Description:
- DIODE ARRAY SCHOT 120V 5A TO-220
- Quantity:
- Payment:
- Shipping:
Inventory:50
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Product details
Overview
STPS10120CT from STMicroelectronics is a dual common-cathode Schottky rectifier in TO-220AB package, rated for 120 V repetitive peak reverse voltage and 2 × 5 A average forward current per diode at Tc = 160 °C, with typical forward voltage drop of 0.64 V at 125 °C and 5 A - optimized for high-frequency SMPS in telecom power supplies and LED lighting.
For engineers reviewing the STPS10120CT datasheet, STPS10120CT pinout, STPS10120CT application, or STPS10120CT equivalent, key selection criteria include junction-to-case thermal resistance (3.8 °C/W per diode), avalanche capability (215 W at 10 µs), low leakage (≤3 mA at 125 °C/VRRM), ECOPACK®2 compliance, and dual-diode thermal coupling behavior in shared heatsink layouts.
Technical Context
This device integrates two independent Schottky diodes sharing a common cathode terminal, enabling synchronous or interleaved rectification topologies without cross-conduction risk. Its low VF and high Tj(max) of 175 °C support compact, high-efficiency DC/DC converters operating under sustained thermal stress.
The TO-220AB package provides direct metal-to-heatsink conduction cooling, with validated Rth(j-c) = 3.8 °C/W per diode and 2.3 °C/W total device rating - critical for predicting thermal derating when both diodes conduct simultaneously under δ = 0.5 square-wave conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 120 V - supports input stages up to 100 V DC bus with margin against transients in telecom and adapter applications |
| IF(AV) per diode | 5 A at Tc = 160 °C - defines continuous output current capability per channel in thermally managed designs |
| VF(typ.) | 0.64 V at 5 A / 125 °C - enables <1.5 W conduction loss per diode at full load, reducing heatsink requirements |
| IR(max) | 3 mA at 125 °C / VRRM - limits standby power loss in high-temperature LED driver or notebook adapter standby modes |
| Tj(max) | 175 °C - allows operation in sealed enclosures or high-ambient industrial environments without forced air |
| Rth(j-c) per diode | 3.8 °C/W - enables accurate junction temperature prediction using measured case temperature and power dissipation |
| PARM | 215 W at tp = 10 µs - sustains short-duration surge events such as inrush or line transients without failure |
Pinout & Package
Package: TO-220AB - insulated plastic case with metal tab (cathode-connected), designed for mechanical mounting to heatsinks via M3 screw (recommended torque: 0.55 N·m).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode 1) | Anode of Diode 1 | Input terminal for first rectification path; electrically isolated from Pin 2 and Pin 3 |
| Pin 2 (Cathode) | Common Cathode | Shared output node; must be connected to system ground or return rail for both diodes |
| Pin 3 (Anode 2) | Anode of Diode 2 | Input terminal for second rectification path; independent conduction control from Pin 1 |
Key Features
| Feature | Design Value |
|---|---|
| High junction temperature capability | Rated for continuous operation up to 175 °C junction temperature - eliminates need for oversized heatsinks in space-constrained adapters |
| Low leakage current | ≤3 mA at 125 °C and full 120 V reverse bias - minimizes standby power loss in energy-sensitive LED drivers |
| Avalanche-rated power | 215 W peak avalanche power at 10 µs pulse - protects against inductive switching spikes in flyback and forward converter primary-side snubbers |
| ECOPACK®2 compliance | Meets RoHS, halogen-free, and lead-free soldering requirements - ensures compatibility with modern environmental manufacturing standards |
| Thermal coupling awareness | Rth(c) = 0.7 °C/W between diodes - enables accurate multi-diode thermal modeling when both channels operate concurrently |
Applications
| Telecom Power Supply | LED Constant-Current Driver |
|---|---|
Use Scenario: 48 V input rectification in distributed telecom power systems with wide ambient temperature range (-40 to +70 °C). IC Role / Device Role / Timing Role: Dual-channel output rectifier handling parallel or interleaved secondary windings in phase-shifted full-bridge topology. Use Value: 0.64 V VF at 125 °C reduces conduction loss by ~18% vs. comparable 100 V Schottkys, improving system efficiency at full load. | Use Scenario: Secondary-side synchronous rectification in constant-current LED drivers for street lighting with passive cooling. IC Role / Device Role / Timing Role: Common-cathode dual diode providing low-loss return path for two independent LED strings driven by separate buck controllers. Use Value: 175 °C Tj(max) allows operation at 95 °C case temperature without derating, eliminating fan requirement in outdoor enclosures. |
| Notebook AC Adapter | Industrial DC/DC Converter |
Use Scenario: High-density 19 V/4.74 A output stage in ultra-thin notebook adapters with strict thermal envelope limits. IC Role / Device Role / Timing Role: Dual-anode, single-cathode configuration enables compact PCB layout for dual-phase output rectification. Use Value: 3.8 °C/W Rth(j-c) per diode supports >90% efficiency at 65 W output with 25 mm² heatsink area. | Use Scenario: 24 V input isolation barrier rectification in DIN-rail mounted programmable logic controller (PLC) power modules. IC Role / Device Role / Timing Role: Primary-side freewheeling diode pair in active clamp forward converter, handling 100 kHz switching with minimal recovery loss. Use Value: Avalanche capability withstands 600 V transient spikes on 24 V bus during motor contactor switching, preventing catastrophic 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-10BQ015-M3/45 | 15 V VRRM, 10 A IF(AV), VF = 0.45 V @ 10 A - lower voltage rating but lower forward loss | Not suitable for 120 V bus applications; limited to ≤15 V output rails | Select only for low-voltage, high-current DC/DC where reverse voltage stress <15 V |
| ON Semiconductor MBR10120CT | Identical 120 V VRRM and 10 A total IF(AV), but VF = 0.82 V @ 5 A / 125 °C - higher conduction loss | Same footprint and pinout; requires larger heatsink for equivalent thermal performance | Use when STPS10120CT is unavailable and thermal margin exists for +0.18 V VF penalty |
Compared with VS-10BQ015-M3/45 and MBR10120CT, STPS10120CT delivers superior thermal robustness (175 °C vs. 150 °C) and lower VF at elevated temperature - critical for high-ambient telecom and industrial applications where efficiency and reliability co-constrain design.
Availability
STPS10120CT is available at Aetrix Electronics and suitable for telecom power supplies, LED lighting drivers, and notebook AC adapters requiring stable component supply, long-term lifecycle support, and traceable ECOPACK®2-compliant sourcing.
Supply support for STPS10120CT 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.
The STPS series targets high-reliability power conversion applications, with STPS10120CT specifically engineered for thermally demanding Schottky rectification in high-frequency switched-mode power supplies.
FAQ
What is the maximum allowable case temperature for continuous operation?
The STPS10120CT supports continuous operation with case temperature up to 160 °C per diode (IF(AV) = 5 A) and 155 °C for the full device (IF(AV) = 10 A). Exceeding these temperatures requires derating per Figure 2 in DS13723, which shows linear reduction to zero current at 175 °C junction temperature.
Can STPS10120CT be used in parallel with another identical device?
No - paralleling multiple STPS10120CT units is not recommended due to mismatched forward voltage characteristics and uncontrolled current sharing. For higher current, use a single higher-rated device or implement active current balancing with external sensing and control circuitry.
Is the TO-220AB package electrically insulated?
Yes - the TO-220AB package features an insulated plastic body with electrically isolated mounting tab. The metal tab is connected to the common cathode (Pin 2), and the plastic insulation meets UL 94 V0 flammability rating, enabling direct heatsink mounting without additional insulators.
Does STPS10120CT require a minimum load to maintain regulation?
No - as a passive rectifier, STPS10120CT has no regulation function and imposes no minimum load requirement. However, light-load reverse leakage (≤6 µA at 25 °C) must be accounted for in ultra-low-power standby circuits where cumulative diode leakage could affect sleep-mode current budgets.
STPS10120CT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 120 V
- Current - Average Rectified (Io) (per Diode):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 850 mV @ 5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 6 µA @ 120 V
- Operating Temperature - Junction:
- 175°C (Max)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220
STPS10120CT FAQ
1.How can I place an order for STPS10120CT through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS10120CT 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 STPS10120CT reliable?
The price and inventory of STPS10120CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS10120CT is usually 5 days.
3.What payment methods are accepted for STPS10120CT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS10120CT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS10120CT?
STPS10120CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS10120CT 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 STPS10120CT?
For technical support, including STPS10120CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS10120CT requirements.
6.How does Aetrix verify that STPS10120CT is sourced from the original manufacturer or authorized distributors?
All STPS10120CT 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 STPS10120CT meets industry standards.
7.What is the process for return or replacement of STPS10120CT?
All STPS10120CT units undergo pre-shipment inspection (PSI). If there is an issue with STPS10120CT, 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 STPS10120CT part is unused and in its original packaging.
Return procedure for STPS10120CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS10120CT Tags
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