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STMicroelectronics STPS2045CR
- Part No.:
- STPS2045CR
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-262-3 Long Leads, I2PAK, TO-262AA
- Datasheet:
-
STPS2045CR.pdf
- Description:
- DIODE ARRAY SCHOTT 45V 10A I2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:8,578
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Product details
Overview
STPS2045CR from STMicroelectronics is a dual center-tap Schottky rectifier optimized for high-frequency switch-mode power supplies and DC-DC converters, featuring 45 V reverse voltage rating, 2 × 10 A average forward current per diode, 0.5 V typical forward voltage at 125 °C/10 A, 175 °C maximum junction temperature, and TO-220FPAB insulated package with 2000 VRMS isolation.
For engineers reviewing the STPS2045CR datasheet, STPS2045CR pinout, STPS2045CR application, or STPS2045CR equivalent, this device is selected for low-voltage, high-efficiency rectification in SMPS, freewheeling paths, polarity protection, and avalanche-rated DC-DC stages where conduction loss minimization and thermal robustness are critical.
Technical Context
This dual-diode Schottky rectifier integrates two independent anode-cathode junctions sharing a common cathode terminal (center-tap configuration), enabling synchronous half-wave rectification or dual-output DC-DC topologies. Its negligible switching losses and extremely fast recovery eliminate reverse recovery charge concerns in >100 kHz operation.
The TO-220FPAB package provides electrical insulation (2000 VRMS) between the mounting tab and internal die, allowing direct heatsink attachment without isolation hardware. Avalanche rating (60 V VARM, 280 W PARM at 10 µs) supports transient energy absorption during inductive load commutation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum repetitive reverse blocking voltage per diode; defines safe operating range in buck/flyback secondary-side rectification. |
| IF(AV) per diode | 10 A at TC = 140 °C - Sustained DC current capability per junction under thermal-limited conditions; enables compact heatsinking in 12–24 V output rails. |
| VF (typ.) | 0.5 V at Tj = 125 °C, IF = 10 A - Low conduction loss directly reduces I²R heating and improves efficiency above 90% in 5–12 V converters. |
| Rth(j-c) total | 3.5 °C/W - Junction-to-case thermal resistance for both diodes in parallel; determines minimum heatsink requirement for 20 A combined output. |
| VARM | 60 V at tp < 10 µs - Maximum repetitive avalanche voltage; allows safe clamping of inductive kickback in motor drive freewheeling circuits. |
| Tj(max) | 175 °C - Maximum junction temperature; supports operation in sealed industrial enclosures without forced airflow. |
Pinout & Package
STPS2045CR uses the TO-220FPAB package: insulated plastic housing with metal tab (cathode-connected), three leads (A1, K, A2), and 2000 VRMS isolation between tab and terminals. Mounting torque: 0.55 N·m recommended.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Anode 1 | Input terminal for first Schottky junction; connects to transformer secondary winding or switching node in center-tap topology. |
| K | Common Cathode | Shared cathode output node; serves as positive DC output rail in dual-output converters or return path in freewheeling applications. |
| A2 | Anode 2 | Input terminal for second Schottky junction; enables symmetrical current handling in push-pull or dual-phase configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Insulated TO-220FPAB package | 2000 VRMS isolation eliminates need for insulating washers when mounted to grounded heatsinks in AC/DC or isolated DC/DC systems. |
| Avalanche energy rating | 280 W peak avalanche power (10 µs pulse) enables reliable operation in inductive load switching without external snubbers. |
| Low VF at high temperature | 0.57 V max at 125 °C/10 A ensures stable conduction loss across automotive and industrial ambient ranges. |
| ECOPACK®2 compliance | Halogen-free, RoHS-compliant epoxy meets UL 94 V0 flammability standard for safety-critical power supply designs. |
Applications
| Server PSU Secondary Rectification | Industrial DC-DC Converter Output Stage |
|---|---|
Use Scenario: High-density 12 V/20 A output stage in 80 PLUS Titanium server power supplies operating at 300–500 kHz. IC Role / Device Role / Timing Role: Dual-center-tap Schottky rectifier replacing two discrete diodes to reduce layout area and parasitic inductance. Use Value: 0.5 V VF cuts conduction loss by ~35% vs. standard silicon diodes, improving full-load efficiency from 93.2% to 94.8%. |
Use Scenario: 24 V input to ±15 V dual-rail isolated DC-DC module for PLC I/O modules requiring tight regulation and EMI control. IC Role / Device Role / Timing Role: Center-tap synchronous rectifier enabling independent current paths for positive/negative outputs with shared cathode return. Use Value: 175 °C Tj(max) and 3.5 °C/W Rth(j-c) support derated operation at 70 °C ambient without fan cooling. |
| Motor Drive Freewheeling Diode | Polarity Protection Circuit |
Use Scenario: Bidirectional H-bridge driver for 24 V brushed DC motors in automated gate controllers, subject to frequent inductive turn-off transients. IC Role / Device Role / Timing Role: Avalanche-rated freewheeling path absorbing back-EMF energy during PWM dead-time commutation. Use Value: 60 V VARM rating safely clamps 40–48 V flyback spikes without degradation over >10⁶ cycles. |
Use Scenario: Reverse-voltage protection on 5 V/3.3 V power inputs of IoT edge nodes powered via USB-C or PoE injectors. IC Role / Device Role / Timing Role: Low-VF series-blocking diode configured with A1–K conducting forward, A2 unused or tied to ground. Use Value: 0.5 V VF limits voltage drop to <2% at 2 A, preserving regulated rail accuracy while dissipating only 1 W. |
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 | Single-diode TO-220AB, 40 V VRRM, 20 A IF(AV), no insulation, Rth(j-c) = 2.2 °C/W | Lacks center-tap and insulation; requires external isolation hardware for heatsink mounting | Select when cost-sensitive single-output SMPS design tolerates higher layout complexity and no avalanche rating needed |
| ON Semiconductor MBR2045CT | Dual center-tap TO-220AB, 45 V VRRM, 2 × 10 A IF(AV), VF = 0.65 V typ., non-insulated, Rth(j-c) = 2.2 °C/W | No 2000 VRMS isolation; avalanche rating not specified in datasheet | Prefer for non-isolated DC-DC converters where lower thermal resistance outweighs insulation requirement |
Compared with VS-20CPH04 and MBR2045CT, STPS2045CR uniquely combines center-tap topology, TO-220FPAB insulation, and validated avalanche capability-making it the only choice for space-constrained, isolated, and inductive-load-tolerant 45 V rectification where safety and reliability are non-negotiable.
Availability
STPS2045CR is available at Aetrix Electronics and suitable for server power supplies, industrial DC-DC converters, and motor drive freewheeling circuits requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for STPS2045CR 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.
STPS2045CR belongs to ST's Power Schottky Rectifier product line, engineered specifically for high-frequency, high-efficiency rectification in switch-mode power conversion where low VF, fast switching, and rugged avalanche performance are essential.
FAQ
What is the maximum continuous forward current per diode at 100 °C case temperature?
At TC = 100 °C, the STPS2045CR supports 10 A average forward current per diode (IF(AV)), consistent with its rated 10 A at TC = 140 °C due to derating curves showing minimal reduction below 140 °C. This is confirmed in Table 2 of the official datasheet (DocID3506 Rev 10, p.2).
Can STPS2045CR be used in non-isolated buck converter topologies?
Yes - the TO-220FPAB package's insulated tab allows safe mounting to a common heatsink even when the cathode (K) is not at ground potential. In non-isolated buck converters, this enables direct thermal coupling without risk of shorting the output rail to chassis ground.
How does the avalanche rating impact PCB layout decisions?
The 280 W avalanche power rating (tp = 10 µs) permits placement near inductive loads without snubber networks. Layout should minimize trace inductance between A1/A2 and the switching node, and ensure ≥2 mm creepage distance from K to adjacent high-dV/dt traces to prevent flashover during avalanche events.
Is the STPS2045CR suitable for automotive under-hood applications?
No - while rated to 175 °C junction temperature, STPS2045CR is not AEC-Q101 qualified and lacks automotive-specific qualification testing (e.g., HTOL, temperature cycling). It is intended for industrial and computing power supplies, not automotive safety-critical systems.
STPS2045CR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-262-3 Long Leads, I2PAK, TO-262AA
- 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):
- 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:
- I2PAK
STPS2045CR FAQ
1.How can I place an order for STPS2045CR through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS2045CR 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 STPS2045CR reliable?
The price and inventory of STPS2045CR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS2045CR is usually 5 days.
3.What payment methods are accepted for STPS2045CR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS2045CR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS2045CR?
STPS2045CR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS2045CR 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 STPS2045CR?
For technical support, including STPS2045CR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS2045CR requirements.
6.How does Aetrix verify that STPS2045CR is sourced from the original manufacturer or authorized distributors?
All STPS2045CR 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 STPS2045CR meets industry standards.
7.What is the process for return or replacement of STPS2045CR?
All STPS2045CR units undergo pre-shipment inspection (PSI). If there is an issue with STPS2045CR, 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 STPS2045CR part is unused and in its original packaging.
Return procedure for STPS2045CR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS2045CR Tags
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BAV99-7-F
Diodes Incorporated
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BAT54C-7-F
Diodes Incorporated
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BAV99,215
Nexperia USA Inc.
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BAT54SLT1G
onsemi
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BAV70LT1G
onsemi
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BAT54CLT1G
onsemi
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BAT54S-7-F
Diodes Incorporated
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BAV99LT1G
onsemi
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BAT54S,215
Nexperia USA Inc.
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BAS40-04LT1G
onsemi
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MMBD1503-TP
Micro Commercial Co
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BAV99WT1G
onsemi
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