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STMicroelectronics STPS10L45CT
- Part No.:
- STPS10L45CT
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-220-3
- Datasheet:
-
STPS10L45CT.pdf
- Description:
- DIODE ARRAY SCHOTT 45V 5A TO-220
- Quantity:
- Payment:
- Shipping:
Inventory:9,777
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Product details
Overview
STPS10L45CT from STMicroelectronics is a dual center-tap low-drop Schottky rectifier in TO-220AB package, rated for 45 V repetitive peak reverse voltage and 10 A average forward current per device (5 A per diode), with typical forward voltage of 0.36 V at 125°C/5 A - optimized for high-frequency DC-DC converters and SMPS secondary-side rectification.
For engineers reviewing the STPS10L45CT datasheet, STPS10L45CT pinout, STPS10L45CT application, or STPS10L45CT equivalent, key selection criteria include low conduction loss (VF ≤ 0.46 V max at 125°C/10 A), avalanche-rated power (2700 W peak), 2000 V DC insulation rating, and thermal resistance of 3 °C/W (junction-to-case, per diode).
Technical Context
This dual common-cathode Schottky rectifier integrates two independent 45 V/5 A diodes sharing a center-tapped cathode configuration, enabling synchronous rectification or dual-output DC-DC topologies. Its low dV/dt rating (10,000 V/µs) supports fast-switching operation without parasitic turn-on.
Thermal design relies on direct conduction cooling via the insulated metal tab (TO-220AB variant), with junction-to-case resistance of 3 °C/W per diode and coupling resistance of 0.35 °C/W between diodes - critical for accurate thermal derating when both diodes operate simultaneously.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - maximum reverse blocking voltage per diode; defines safe operating range in buck-derived or flyback secondary circuits. |
| IF(AV) per diode | 5 A at Tc = 135°C, δ = 0.5 - usable continuous current per diode under heatsink-cooled conditions. |
| VF max | 0.46 V at 125°C/10 A - ensures <1.5 W conduction loss per diode at full load, minimizing thermal stress. |
| IFSM | 150 A (10 ms sinusoidal) - supports short-term overload tolerance during startup or transient events. |
| Rth(j-c) per diode | 3 °C/W - enables precise junction temperature prediction using measured case temperature and power dissipation. |
| dV/dt | 10,000 V/µs - prevents false triggering in high dv/dt environments like resonant LLC or phase-shifted full-bridge converters. |
| Insulation voltage | 2000 V DC - allows safe mounting on non-isolated heatsinks in grounded-chassis industrial power supplies. |
Pinout & Package
TO-220AB package with insulated metal tab (2000 V DC isolation), 3-pin configuration: Pin 1 (A1) and Pin 2 (A2) are anode terminals of Diode 1 and Diode 2 respectively; Pin 3 (K) is the shared cathode terminal. Mounting hole centered on tab, recommended torque 0.55 N·m.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Anode of Diode 1 | Input node for first rectification path; connects to transformer secondary winding or switching node. |
| A2 | Anode of Diode 2 | Input node for second rectification path; enables dual-output or center-tapped transformer interface. |
| K | Common cathode | Output node shared by both diodes; ties to output capacitor and load return, defining system ground reference. |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage drop | 0.36 V typ. at 125°C/5 A - reduces conduction loss by >30% vs. standard silicon rectifiers in 5–12 V output rails. |
| Avalanche energy rating | 2700 W peak (1 µs pulse) - provides robustness against inductive switching transients without external snubbers. |
| High-frequency capability | Negligible reverse recovery charge (Qrr ≈ 0) - eliminates switching losses and EMI in >100 kHz DC-DC designs. |
| Insulated package | 2000 V DC isolation between tab and leads - permits direct heatsink mounting without insulating pads in isolated topologies. |
| Thermal coupling control | 0.35 °C/W coupling resistance between diodes - enables accurate thermal modeling when both diodes conduct simultaneously. |
Applications
| Server VRM Output Stage | Laptop AC-DC Adapter Secondary |
|---|---|
Use Scenario: High-current, low-voltage (3.3–5 V) output stage of multiphase buck converter supplying CPU core power. IC Role / Device Role / Timing Role: Dual-anode Schottky rectifier providing synchronous rectification for two interleaved phases with shared cathode return. Use Value: 0.36 V VF at 125°C cuts conduction loss by ~40% vs. Si diodes, reducing heatsink size and improving efficiency above 92%. | Use Scenario: Secondary-side rectification in compact 65 W flyback adapter with universal input (90–264 VAC). IC Role / Device Role / Timing Role: Center-tapped dual Schottky replacing two discrete diodes to simplify layout and reduce leakage-induced cross-conduction. Use Value: 2000 V DC insulation allows direct heatsink mounting on grounded chassis, eliminating insulating hardware and saving PCB space. |
| Industrial PLC Power Module | Telecom DC-DC Brick Input Protection |
Use Scenario: 24 V DC input protection and polarity reversal safeguard in programmable logic controller power supply. IC Role / Device Role / Timing Role: Dual-anode configuration used as active OR-ing diode pair for redundant 24 V inputs with shared cathode output. Use Value: Low 0.46 V max VF minimizes voltage drop across protection path, preserving >23.5 V at load under full 5 A per rail. | Use Scenario: Input-stage free-wheeling and clamping in 48 V input telecom DC-DC brick with synchronous rectification. IC Role / Device Role / Timing Role: Fast-recovery Schottky clamp absorbing inductive kickback from high-side MOSFET during dead-time transitions. Use Value: 10,000 V/µs dV/dt rating prevents spurious turn-on during 50–100 ns switching edges, ensuring reliable clamping without oscillation. |
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-10BQ045-M3 | Same 45 V VRRM, 10 A IF(AV), but TO-263 (D2PAK); Rth(j-c) = 2.5 °C/W per diode; no insulation rating specified. | Requires insulated mounting hardware for grounded heatsinks; better thermal performance but higher assembly cost. | Select when board space allows D2PAK and thermal budget is tighter than mechanical isolation requirements. |
| ON Semiconductor SB1045 | 45 V VRRM, 10 A IF(AV), TO-220AB package, but single-diode configuration; no center-tap; VF = 0.55 V max at 125°C/10 A. | Needs two devices for dual-path operation; higher conduction loss and larger footprint. | Select only if dual-anode topology is not required and discrete layout flexibility is preferred over integration. |
Compared with VS-10BQ045-M3 and SB1045, STPS10L45CT uniquely combines dual center-tap integration, 2000 V insulation, and sub-0.46 V VF in TO-220AB - making it optimal for space-constrained, isolated, high-efficiency dual-rail or OR-ing applications where thermal and safety margins are jointly critical.
Availability
STPS10L45CT is available at Aetrix Electronics and suitable for server VRM output stages, laptop AC-DC adapters, and industrial PLC power modules requiring stable component supply, consistent thermal performance, and certified isolation compliance.
Supply support for STPS10L45CT 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, designing and manufacturing analog, digital, and mixed-signal ICs and discrete power devices for automotive, industrial, and consumer markets.
This device belongs to ST's Power Schottky Rectifier product line, engineered specifically for high-frequency, low-loss secondary-side rectification in switched-mode power supplies where efficiency, thermal reliability, and safety isolation are co-prioritized.
FAQ
What is the maximum junction temperature and how is it enforced?
The absolute maximum junction temperature is 150°C, validated by thermal runaway analysis (dPtot/dTj < −1 condition). Operation beyond this limit risks irreversible degradation. Designers must use Rth(j-c) = 3 °C/W and measured case temperature to calculate actual Tj - derating is required above 135°C case temperature per the IF(AV) spec.
Can STPS10L45CT be used in non-isolated topologies like buck converters?
Yes - its 2000 V DC insulation allows safe mounting on a common heatsink even in non-isolated buck converters. However, the shared cathode (K) must be tied to the system output ground, and A1/A2 connected to respective phase nodes. No additional isolation hardware is needed, simplifying mechanical design.
How does the dual-diode thermal coupling affect power derating?
When both diodes conduct simultaneously, junction temperature rise of Diode 1 equals P₁ × Rth(j-c) + P₂ × Rth(c), where Rth(c) = 0.35 °C/W. This coupling effect increases effective thermal resistance - ignoring it may underestimate Tj by up to 15°C at balanced 5 A loads, risking premature thermal shutdown.
Is avalanche rating tested per diode or per device?
The 2700 W peak avalanche power (tp = 1 µs, Tj = 25°C) is specified per diode, not per device. Each diode can independently absorb this energy without failure. This enables robustness in asymmetric fault conditions - e.g., one diode clamping inductive kickback while the other remains idle.
STPS10L45CT 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):
- 45 V
- Current - Average Rectified (Io) (per Diode):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 530 mV @ 5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 150 µA @ 45 V
- Operating Temperature - Junction:
- 150°C (Max)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220
STPS10L45CT FAQ
1.How can I place an order for STPS10L45CT through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS10L45CT 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 STPS10L45CT reliable?
The price and inventory of STPS10L45CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS10L45CT is usually 5 days.
3.What payment methods are accepted for STPS10L45CT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS10L45CT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS10L45CT?
STPS10L45CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS10L45CT 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 STPS10L45CT?
For technical support, including STPS10L45CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS10L45CT requirements.
6.How does Aetrix verify that STPS10L45CT is sourced from the original manufacturer or authorized distributors?
All STPS10L45CT 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 STPS10L45CT meets industry standards.
7.What is the process for return or replacement of STPS10L45CT?
All STPS10L45CT units undergo pre-shipment inspection (PSI). If there is an issue with STPS10L45CT, 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 STPS10L45CT part is unused and in its original packaging.
Return procedure for STPS10L45CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS10L45CT Tags
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BAT54C-7-F
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BAV99,215
Nexperia USA Inc.
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BAT54SLT1G
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BAV70LT1G
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BAT54CLT1G
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BAT54S-7-F
Diodes Incorporated
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BAV99LT1G
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BAT54S,215
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BAS40-04LT1G
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MMBD1503-TP
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BAV99WT1G
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