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STMicroelectronics STPS2045CT
- Part No.:
- STPS2045CT
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-220-3
- Datasheet:
-
STPS2045CT.pdf
- Description:
- DIODE ARRAY SCHOT 45V 10A TO-220
- Quantity:
- Payment:
- Shipping:
Inventory:1,983
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Product details
Overview
STPS2045CT from STMicroelectronics is a dual center-tap Schottky rectifier in TO-220AB package, rated for 45 V repetitive peak reverse voltage, 2 × 10 A average forward current per diode, and 0.5 V typical forward voltage at 125 °C/10 A - optimized for low-voltage, high-frequency DC-DC converters and SMPS secondary-side rectification.
For engineers reviewing the STPS2045CT datasheet, STPS2045CT pinout, STPS2045CT application, or STPS2045CT equivalent, key selection criteria include avalanche rating (60 V VARM), thermal resistance (1.4 °C/W total junction-to-case), insulated package (2000 VRMS isolation), and conduction loss model (P = 0.42 × IF(AV) + 0.015 × IF²(RMS)).
Technical Context
This dual-diode Schottky rectifier integrates two independent anode-cathode paths sharing a common cathode terminal (center-tap configuration), enabling synchronous rectification or dual-output DC-DC topologies. Its negligible switching losses and extremely fast recovery eliminate reverse recovery charge concerns in >100 kHz converters.
The TO-220AB package provides direct heatsink mounting with 2000 VRMS insulation between tab and internal die, supporting safe operation in isolated power supplies. Avalanche rating (280 W peak, 60 V VARM) allows controlled energy absorption during transient overvoltage events without failure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - maximum reverse blocking capability per diode; sets upper limit for output voltage in flyback or forward converters |
| IF(AV) per diode | 10 A at TC = 155 °C - defines continuous DC output current per leg in dual-rail or center-tap transformer designs |
| VF (typ.) | 0.5 V at 125 °C / 10 A - directly determines conduction loss (≈5 W per diode at full load) |
| Rth(j-c) total | 1.4 °C/W - enables thermal design with ≤14 °C temperature rise at 10 W dissipation per diode |
| VARM | 60 V - maximum repetitive avalanche voltage; supports robustness against inductive kickback in free-wheeling applications |
| Tj(max) | 175 °C - allows operation in high-ambient environments (e.g., enclosed industrial PSUs) with proper heatsinking |
| IR @ 125 °C | 15 mA max - limits leakage-induced standby power loss in battery-backed systems |
Pinout & Package
STPS2045CT uses the TO-220AB package with insulated metal tab (2000 VRMS isolation). The device has three external terminals: two anodes (A1, A2) and one shared cathode (K).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Anode of Diode 1 | Connects to primary winding tap or first output rail; carries forward current only when cathode is more positive |
| A2 | Anode of Diode 2 | Connects to second winding tap or alternate output rail; enables dual-output or center-tap full-wave rectification |
| K | Common Cathode | Output node for both diodes; must be connected to lowest potential point (e.g., ground or negative rail) |
Key Features
| Feature | Design Value |
|---|---|
| Insulated TO-220AB package | 2000 VRMS isolation enables use in Class II isolated AC-DC adapters without additional creepage/clearance barriers |
| Avalanche-rated operation | 280 W peak avalanche power (tp = 10 µs) ensures survivability during MOSFET turn-off transients in synchronous buck converters |
| Low VF at high Tj | 0.57 V max at 125 °C/10 A reduces conduction loss drift across operating temperature range |
| ECOPACK®2 compliance | Halogen-free, RoHS-compliant epoxy meets UL 94 V0 flammability standard for safety-critical power supplies |
Applications
| Server VRM Output Stage | Laptop Adapter Secondary Rectification |
|---|---|
Use Scenario: High-current, low-voltage DC-DC conversion delivering 12 A at 1.2 V from 12 V input in server CPU voltage regulators. IC Role / Device Role / Timing Role: Dual-center-tap Schottky rectifier replacing synchronous MOSFETs where gate drive complexity is prohibitive. Use Value: Eliminates reverse recovery loss and simplifies layout while maintaining <15 mΩ effective RDS(on) equivalent conduction resistance at full load. | Use Scenario: Secondary-side rectification in 65 W universal-input laptop adapters operating at 100–300 kHz switching frequency. IC Role / Device Role / Timing Role: Center-tap full-wave rectifier converting transformer secondary AC to regulated 20 V DC output. Use Value: 0.5 V VF minimizes heat generation in compact enclosures; insulated tab avoids grounding conflicts on PCB-mounted heatsinks. |
| Industrial PLC Power Module | Automotive Infotainment DC-DC Converter |
Use Scenario: 24 V input to ±15 V dual-rail supply for analog I/O modules in programmable logic controllers. IC Role / Device Role / Timing Role: Dual-leg rectifier feeding independent linear regulators for noise-sensitive analog circuitry. Use Value: 175 °C max junction temperature supports operation in unventilated control cabinets up to 70 °C ambient. | Use Scenario: 12 V automotive battery input to 5 V/3.3 V DC-DC converter powering infotainment head units. IC Role / Device Role / Timing Role: Free-wheeling diode in buck converter topology handling load dump transients. Use Value: Avalanche rating absorbs 60 V transients per MIL-STD-1275B without derating or snubbers. |
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-20CPH04 | Same 45 V VRRM, 20 A total IF(AV), but TO-247 package; higher Rth(j-c) = 1.8 °C/W | Requires larger heatsink area due to lower thermal efficiency; no built-in insulation | Select when higher surge current (220 A IFSM) is required and isolation is handled externally |
| ON Semiconductor MBR2045CT | Identical TO-220AB pinout and 45 V rating, but VF = 0.65 V typ. at 125 °C/10 A; not avalanche rated | Not suitable for inductive transient suppression; requires external clamping in flyback designs | Choose for cost-sensitive consumer adapters where avalanche robustness is not mandated |
Compared with VS-20CPH04 and MBR2045CT, STPS2045CT uniquely combines 2000 VRMS insulation, 60 V avalanche capability, and 1.4 °C/W thermal resistance - making it optimal for space-constrained, safety-isolated, and transient-prone industrial power supplies.
Availability
STPS2045CT is available at Aetrix Electronics and suitable for server VRMs, laptop adapters, industrial PLC power modules, and automotive infotainment DC-DC converters requiring stable component supply, long-term lifecycle support, and certified traceable sourcing.
Supply support for STPS2045CT 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.
STPS2045CT belongs to ST's high-efficiency Schottky rectifier product line, engineered specifically for high-frequency, low-voltage power conversion where conduction loss, thermal performance, and reliability under transient stress are critical.
FAQ
What is the maximum allowable case temperature for continuous operation?
The STPS2045CT is rated for 155 °C case temperature (TC) when delivering 10 A average forward current per diode in TO-220AB package. Exceeding this temperature reduces IF(AV) derating per Figure 2 in the datasheet; sustained operation above 155 °C risks thermal runaway unless thermal impedance is actively managed via heatsink design.
Is the metal tab electrically isolated from the internal die?
Yes - the TO-220AB package used in STPS2045CT features reinforced insulation with 2000 VRMS withstand voltage between the metal tab and internal semiconductor die. This allows direct mounting to grounded heatsinks without shorting the cathode terminal, simplifying mechanical integration in isolated power supplies.
How does the avalanche rating impact system-level design?
The 60 V VARM and 280 W PARM ratings enable the STPS2045CT to absorb inductive energy during MOSFET turn-off without external snubbers. In buck or flyback converters, this eliminates need for TVS diodes or RC networks across the switch, reducing BOM count and improving reliability under load-dump or short-circuit conditions.
Can STPS2045CT replace a single-diode TO-220 Schottky in existing designs?
No - STPS2045CT is a dual-diode center-tap device with three terminals (A1, A2, K); it cannot substitute for a single-diode part without modifying the transformer winding or PCB layout. Its value lies in dual-output or full-wave center-tap topologies, not single-rail rectification.
STPS2045CT 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):
- 45 V
- Current - Average Rectified (Io) (per Diode):
- 10A
- Voltage - Forward (Vf) (Max) @ If:
- 570 mV @ 10 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 45 V
- Operating Temperature - Junction:
- 175°C (Max)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220
STPS2045CT FAQ
1.How can I place an order for STPS2045CT through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS2045CT 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 STPS2045CT reliable?
The price and inventory of STPS2045CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS2045CT is usually 5 days.
3.What payment methods are accepted for STPS2045CT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS2045CT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS2045CT?
STPS2045CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS2045CT 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 STPS2045CT?
For technical support, including STPS2045CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS2045CT requirements.
6.How does Aetrix verify that STPS2045CT is sourced from the original manufacturer or authorized distributors?
All STPS2045CT 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 STPS2045CT meets industry standards.
7.What is the process for return or replacement of STPS2045CT?
All STPS2045CT units undergo pre-shipment inspection (PSI). If there is an issue with STPS2045CT, 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 STPS2045CT part is unused and in its original packaging.
Return procedure for STPS2045CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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