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STMicroelectronics STPS1045SF
- Part No.:
- STPS1045SF
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
STPS1045SF.pdf
- Description:
- DIODE SCHOTTKY 45V 10A TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:2,888
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Product details
Overview
STPS1045SF from STMicroelectronics is a 45 V, 10 A average forward current Schottky barrier rectifier in PSMC (TO-277A) package, featuring 0.51 V typical forward voltage at 10 A and 125 °C, 175 °C maximum junction temperature, and wettable flanks for automated optical inspection. It is engineered for reverse battery protection and high-frequency DC/DC converters in space-constrained consumer power adapters.
For engineers reviewing the STPS1045SF datasheet, STPS1045SF pinout, STPS1045SF application, or STPS1045SF equivalent, key selection criteria include low conduction loss (VF ≤ 0.57 V @ 10 A, 125 °C), avalanche capability (172 W peak), thermal robustness (Rth(j-c) = 2.5 °C/W), and ECOPACK®2 compliance for lead-free assembly.
Technical Context
This Schottky rectifier uses a planar silicon structure optimized for minimal forward voltage and leakage trade-off across -65 to +175 °C operating range. Its 2.5 °C/W junction-to-case thermal resistance enables high-power density mounting on small copper pads without external heatsinks.
Designed for unidirectional power conversion, it delivers 210 A non-repetitive surge current with controlled avalanche energy handling and exhibits <23 mA reverse leakage at 125 °C and full 45 V reverse bias - critical for battery protection reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) | 10 A average forward current at Tc = 140 °C - supports continuous 12 W conduction loss in compact DC/DC layouts |
| VRRM | 45 V repetitive peak reverse voltage - suitable for 36 V nominal battery systems with margin |
| VF (typ.) | 0.51 V @ 10 A, 125 °C - reduces conduction loss by ~18% vs. comparable 0.62 V parts at same condition |
| Tj (max.) | +175 °C - enables operation in sealed enclosures or near heat sources without derating |
| Rth(j-c) | 2.5 °C/W - allows direct PCB copper thermal path design without soldered heatsink |
| IR (max.) | 23 mA @ 125 °C, VR = 45 V - ensures low standby drain in reverse-battery protection circuits |
| IFSM | 210 A @ 10 ms sine - withstands inrush during hot-plug or load dump events |
Pinout & Package
PSMC (TO-277A) is a 3-terminal surface-mount package with 1.1 mm typical height, wettable flanks, and epoxy meeting UL94 V0. The cathode tab serves as both electrical terminal and primary thermal path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 | Forward current input | Connected to input rail; dual anode terminals share 10 A total IF(AV) |
| Anode 2 | Forward current input | Parallel anode connection - reduces effective series resistance and thermal gradient |
| Cathode (Tab) | Forward current return / thermal interface | Exposed metal pad for soldering to PCB copper pour; carries full output current and dissipates heat |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile PSMC package | 1.1 mm height enables use in ultra-thin adapters and set-top box power modules |
| Wettable flanks | Side-wall metallization supports automated optical inspection (AOI) of solder joint integrity |
| Avalanche-rated | 172 W peak avalanche power at 10 µs pulse - protects against inductive switching transients |
| High-Tj operation | Rated up to +175 °C junction temperature - eliminates need for thermal derating in sealed environments |
| ECOPACK®2 compliance | Lead-free, halogen-free, RoHS-compliant construction with qualified green molding compound |
Applications
| Set-Top Box Power Supply | Battery Charger Output Stage |
|---|---|
Use Scenario: Secondary-side rectification in 12–24 V isolated flyback converters powering IPTV and streaming devices. IC Role / Device Role / Timing Role: Schottky rectifier replacing fast recovery diodes to reduce conduction loss and improve efficiency above 85%. Use Value: 0.51 V VF at 10 A lowers dissipation by 1.1 W vs. 0.62 V alternative, enabling smaller heatsink or higher power density. | Use Scenario: Output rectification in USB-PD and QC-compatible wall adapters delivering up to 30 W. IC Role / Device Role / Timing Role: Synchronous rectifier substitute in cost-sensitive designs where MOSFET gate drive complexity is avoided. Use Value: Wettable flanks ensure AOI-verified solder joints on high-volume production lines, reducing field failure risk. |
| Automotive Reverse Battery Protection | Industrial DC/DC Converter Input Stage |
Use Scenario: Polarity protection circuit between vehicle battery and infotainment ECU input rails. IC Role / Device Role / Timing Role: Low-VF series-blocking diode preventing damage during jump-start or incorrect cable connection. Use Value: 23 mA IR max at 125 °C limits reverse leakage to <0.55 mW - avoids parasitic drain in parked vehicles. | Use Scenario: Input rectification in 48 V telecom DC/DC bricks converting to 12 V intermediate bus. IC Role / Device Role / Timing Role: High-current, high-temperature rectifier handling transient surges and ambient temperatures up to 105 °C. Use Value: 175 °C Tj rating allows full 10 A current delivery without derating in enclosed chassis with limited airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor SB1040 | 40 V VRRM, 10 A IF(AV), VF = 0.55 V @ 10 A, 25 °C; no wettable flanks; Rth(j-c) = 3.0 °C/W | Limited to ≤36 V systems; requires larger PCB copper area for thermal management | Lower-cost option where 45 V margin and AOI capability are not required |
| Vishay VS-10BQ040 | 40 V VRRM, 10 A IF(AV), VF = 0.52 V @ 10 A, 125 °C; TO-277 package (non-wettable); Tj(max) = 150 °C | Not rated for 175 °C operation; lacks ECOPACK®2 environmental certification | Suitable for industrial applications with lower ambient temperature ceilings and legacy qualification requirements |
Compared with SB1040 and VS-10BQ040, STPS1045SF provides superior reverse voltage margin (45 V), higher junction temperature rating (+175 °C), and AOI-ready wettable flanks - making it optimal for next-generation compact, thermally aggressive, and high-reliability power designs.
Availability
STPS1045SF is available at Aetrix Electronics and suitable for set-top box power supplies, battery charger output stages, and industrial DC/DC converters requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for STPS1045SF 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, power, microcontroller, and sensor solutions for automotive, industrial, and consumer markets.
The STPS series targets high-efficiency, high-reliability power conversion applications - specifically optimizing Schottky rectifiers for thermal performance, surge robustness, and manufacturability in automated SMT lines.
FAQ
What is the maximum allowable case temperature for continuous 10 A operation?
The datasheet specifies IF(AV) = 10 A at Tc = 140 °C under δ = 0.5 square wave conditions. Operation at higher case temperatures requires derating per Figure 1; sustained 140 °C case temperature is permissible only with adequate PCB copper area and airflow to maintain Tj ≤ 175 °C.
Does STPS1045SF support automatic optical inspection (AOI)?
Yes - the PSMC (TO-277A) package features wettable flanks, meaning the side walls of the anode and cathode terminals are metallized to enable reliable solder fillet formation and machine vision detection during AOI. This is confirmed in the "Features" section and package drawings.
How does the avalanche rating impact system-level reliability?
The 172 W peak avalanche power rating (tp = 10 µs, Tj = 125 °C) means the device can safely absorb transient energy from inductive kickback or load dump without failure. This eliminates need for external TVS clamps in many battery protection and DC/DC converter designs.
Can STPS1045SF be used in place of a standard TO-220 rectifier?
No - STPS1045SF uses the surface-mount PSMC (TO-277A) package, not through-hole TO-220. While electrically comparable to some TO-220 Schottkys, its thermal path relies entirely on PCB copper, requiring layout adaptation. Mechanical replacement is not feasible without board redesign.
STPS1045SF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- ECOPACK®2
- Package/Case:
- TO-277, 3-PowerDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io):
- 10A
- Voltage - Forward (Vf) (Max) @ If:
- -
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 50 µA @ 45 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-277A (SMPC)
- Operating Temperature - Junction:
- 175°C (Max)
STPS1045SF FAQ
1.How can I place an order for STPS1045SF through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS1045SF 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 STPS1045SF reliable?
The price and inventory of STPS1045SF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS1045SF is usually 5 days.
3.What payment methods are accepted for STPS1045SF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS1045SF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS1045SF?
STPS1045SF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS1045SF 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 STPS1045SF?
For technical support, including STPS1045SF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS1045SF requirements.
6.How does Aetrix verify that STPS1045SF is sourced from the original manufacturer or authorized distributors?
All STPS1045SF 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 STPS1045SF meets industry standards.
7.What is the process for return or replacement of STPS1045SF?
All STPS1045SF units undergo pre-shipment inspection (PSI). If there is an issue with STPS1045SF, 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 STPS1045SF part is unused and in its original packaging.
Return procedure for STPS1045SF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS1045SF Tags
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