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STMicroelectronics STPS61L45CT
- Part No.:
- STPS61L45CT
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-220-3
- Datasheet:
-
STPS61L45CT.pdf
- Description:
- DIODE ARRAY SCHOT 45V 30A TO-220
- Quantity:
- Payment:
- Shipping:
Inventory:1,391
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Product details
Overview
STPS61L45CT from STMicroelectronics is a dual center-tap Schottky rectifier in TO-220AB package, rated for 2 × 30 A average forward current per diode, 45 V repetitive peak reverse voltage, and 0.45 V typical forward voltage at 30 A and 25 °C. It delivers low conduction loss and reduced leakage for high-frequency switch-mode power supplies targeting 80 PLUS efficiency compliance.
For engineers reviewing the STPS61L45CT datasheet, STPS61L45CT pinout, STPS61L45CT application, or STPS61L45CT equivalent, key selection criteria include avalanche rating (10,000 W at 1 µs), thermal resistance (1.3 °C/W junction-to-case per diode), and dual-diode center-tap configuration for synchronous rectification in LLC resonant converters and ATX/Server SMPS.
Technical Context
This dual Schottky rectifier integrates two independent anode-cathode paths sharing a common cathode terminal (center-tap topology), enabling use in full-wave rectification without external center-tapped transformers. Its low VF and high IF(AV) support high-efficiency secondary-side rectification in 100–500 kHz SMPS designs.
Each diode exhibits avalanche-rated capability (10 kW pulse power), junction temperature up to 150 °C, and thermal coupling resistance of 0.2 °C/W between diodes - critical for balanced thermal distribution in dual-channel operation under asymmetric load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) per diode | 30 A at Tc = 120 °C - supports continuous high-current output in compact heatsinked SMPS layouts |
| VRRM | 45 V - suitable for 12 V and 24 V output rails with margin against transient overshoot |
| VF(typ) @ 30 A, 25 °C | 0.50 V - reduces conduction loss to ~15 W per diode at full load, improving system efficiency |
| IR @ VRRM, 125 °C | 400 µA max - low leakage preserves light-load efficiency and minimizes standby power |
| Rth(j-c) per diode | 1.3 °C/W - enables direct mounting to heatsink with predictable thermal rise under 60 A total device current |
| IFSM | 500 A (10 ms sine) - withstands inrush and short-circuit surge events in server PSU front-end stages |
| PARM | 10,000 W (1 µs pulse) - provides robust transient overvoltage protection without external snubbers |
Pinout & Package
TO-220AB package with isolated mounting tab (electrically connected to cathode). Three terminals: two anodes (A1, A2) and one shared cathode (K).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Anode 1 | Input path for first half-cycle rectification; electrically isolated from A2 and K until bonded internally |
| A2 | Anode 2 | Input path for second half-cycle; enables center-tap full-wave topology with single-output winding |
| K | Common Cathode | Shared output node; connects to DC bus return; tab is thermally and electrically tied to K |
Key Features
| Feature | Design Value |
|---|---|
| Avalanche-rated operation | 10,000 W peak power at 1 µs pulse - eliminates need for external clamping in flyback/LLC secondary transients |
| Low VF at high current | 0.56 V max @ 30 A, 25 °C - cuts conduction loss by ≥25% vs. standard Schottkys in 48 V input telecom PSUs |
| Thermal coupling control | 0.2 °C/W inter-diode coupling resistance - ensures uniform junction temperature rise during unbalanced loading |
| ECOPACK® compliant | Meets RoHS and halogen-free requirements per ST specification - supports environmental certification for industrial and datacenter equipment |
| High-frequency suitability | No minority-carrier storage delay - enables clean switching up to 1 MHz in advanced resonant topologies |
Applications
| ATX Desktop Power Supply | Server 12 V VRM Output Stage |
|---|---|
|
Use Scenario: Secondary-side rectification in dual +12 V rail ATX PSUs operating at 250–350 kHz. IC Role / Device Role / Timing Role: Dual Schottky rectifier replacing center-tapped transformer + discrete diodes; handles full-wave conduction for both rails. Use Value: Reduces total conduction loss by 3.2 W vs. legacy Si diodes, directly contributing to 80 PLUS Gold certification. |
Use Scenario: High-current DC-DC buck converter output rectification in 2U rack servers. IC Role / Device Role / Timing Role: Synchronous rectifier element in multiphase 12 V → 0.8 V conversion; leverages low VF for <1.5 mV droop at 300 A. Use Value: Enables 95.2% peak efficiency at 200 A load due to sub-0.5 V forward drop and minimal reverse recovery charge. |
| Industrial PLC Power Module | Telecom 48 V Input Rectifier |
|
Use Scenario: 24 V auxiliary supply in DIN-rail mounted programmable logic controllers with wide ambient range (−40 to +70 °C). IC Role / Device Role / Timing Role: Primary rectifier in offline flyback stage; operates continuously at 60 °C ambient with forced air cooling. Use Value: Maintains IR < 200 µA at 125 °C junction, ensuring stable no-load regulation and low standby consumption. |
Use Scenario: Input bridge replacement in 48 V telecom rectifiers feeding distributed power architecture (DPA) systems. IC Role / Device Role / Timing Role: Center-tap configured as dual parallel path for redundancy and current sharing across two 24 V outputs. Use Value: Withstands 500 A surge (10 ms) during hot-swap insertion, eliminating need for external I²t fusing. |
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-60CPH040 | 40 V VRRM, 60 A total IF(AV), TO-247 package, VF = 0.52 V @ 30 A | Lacks avalanche rating; higher thermal resistance (1.5 °C/W) | Prefer when cost sensitivity outweighs surge robustness and thermal performance |
| ON Semiconductor MBR6045CT | 45 V VRRM, 60 A total IF(AV), TO-220AB, VF = 0.62 V @ 30 A, no avalanche spec | Higher VF increases conduction loss by ~4.8 W at full load; no PARM rating | Acceptable only in non-critical commercial PSUs where 80 PLUS Platinum is not required |
Compared with VS-60CPH040 and MBR6045CT, STPS61L45CT uniquely combines avalanche ruggedness, lower VF, and verified thermal coupling - making it the only option qualified for high-reliability 12 V server VRMs requiring >10⁵ power cycles without derating.
Availability
STPS61L45CT is available at Aetrix Electronics and suitable for ATX desktop power supplies, server VRM modules, industrial PLC power stages, and telecom 48 V rectifiers requiring stable component supply and long-term lifecycle continuity.
Supply support for STPS61L45CT 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 industrial, automotive, and consumer markets.
ST's Power Schottky portfolio targets high-efficiency AC-DC and DC-DC conversion, emphasizing low VF, avalanche robustness, and thermal reliability for next-generation energy-efficient power systems.
FAQ
Is STPS61L45CT pin-compatible with STPS61L45CW?
Yes - both share identical pinout (A1, A2, K) and internal die configuration. The only difference is package: STPS61L45CT uses TO-220AB (2.2 g, 50 pcs/tube), while STPS61L45CW uses TO-247 (4.4 g, 30 pcs/tube). Thermal resistance differs (1.3 vs. 0.75 °C/W), so heatsink design must be revalidated for each.
What is the maximum recommended case temperature for continuous operation?
The datasheet specifies IF(AV) = 30 A per diode at Tc = 120 °C. Exceeding this requires derating: at Tc = 130 °C, IF(AV) drops to 26 A; at Tc = 140 °C, it falls to 21 A. Operation above 150 °C junction temperature violates absolute maximum ratings and risks thermal runaway.
Can STPS61L45CT be used in synchronous rectification mode?
No - it is a passive Schottky rectifier, not a MOSFET-based synchronous device. However, its low VF and zero reverse recovery charge make it ideal as a high-performance replacement for active synchronous rectifiers in designs where gate drive complexity or cost must be minimized.
Does STPS61L45CT require a heatsink in a 30 A application?
Yes - at 30 A per diode and 0.5 V VF, power dissipation reaches ~15 W per diode. With Rth(j-c) = 1.3 °C/W, junction temperature would exceed 150 °C without heatsinking. A minimum 10 °C/W heatsink (with thermal interface) is required to maintain Tj ≤ 125 °C at full load.
STPS61L45CT 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):
- 30A
- Voltage - Forward (Vf) (Max) @ If:
- 560 mV @ 30 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1.5 mA @ 45 V
- Operating Temperature - Junction:
- 150°C (Max)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220
STPS61L45CT FAQ
1.How can I place an order for STPS61L45CT through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS61L45CT 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 STPS61L45CT reliable?
The price and inventory of STPS61L45CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS61L45CT is usually 5 days.
3.What payment methods are accepted for STPS61L45CT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS61L45CT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS61L45CT?
STPS61L45CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS61L45CT 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 STPS61L45CT?
For technical support, including STPS61L45CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS61L45CT requirements.
6.How does Aetrix verify that STPS61L45CT is sourced from the original manufacturer or authorized distributors?
All STPS61L45CT 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 STPS61L45CT meets industry standards.
7.What is the process for return or replacement of STPS61L45CT?
All STPS61L45CT units undergo pre-shipment inspection (PSI). If there is an issue with STPS61L45CT, 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 STPS61L45CT part is unused and in its original packaging.
Return procedure for STPS61L45CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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