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STMicroelectronics STPS1045SFY
- Part No.:
- STPS1045SFY
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
STPS1045SFY.pdf
- Description:
- DIODE SCHOTTKY 45V 10A TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:16,905
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Product details
Overview
STPS1045SFY from STMicroelectronics is an AEC-Q101-qualified 45 V, 10 A average forward current automotive Schottky rectifier in PSMC (TO-277A) package, featuring 0.51 V typical forward voltage at 10 A and 125 °C junction temperature, 2.5 °C/W junction-to-case thermal resistance, and wettable flanks for automated optical inspection-used in DC/DC converters and reverse polarity protection circuits.
For engineers reviewing the STPS1045SFY datasheet, STPS1045SFY pinout, STPS1045SFY application, or STPS1045SFY equivalent, key selection criteria include its 175 °C max junction temperature rating, avalanche capability at 172 W (10 µs), low capacitance, negligible switching losses, and ECOPACK®2 compliance for automotive-grade reliability.
Technical Context
This Schottky rectifier uses a planar silicon structure optimized for low VF and high-temperature operation, with dual-anode terminals shorted internally to support high surge current (210 A, 10 ms sine) and stable reverse leakage (<23 mA at 125 °C, VR = 45 V). Its thermal design enables conduction loss calculation via P = 0.35 × IF(AV) + 0.022 × IF²(RMS).
The device operates across -40 °C to +175 °C junction temperature range, with VRRM guaranteed over that full span and Rth(j-c) of 2.5 °C/W enabling compact heatsink integration. Wettable flanks and PPAP capability confirm suitability for automated SMT assembly and automotive production validation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum repetitive reverse voltage sustained across full -40 °C to +175 °C operating range |
| IF(AV) | 10 A - Average forward current at Tc = 140 °C with 0.5 duty cycle, defining continuous power handling |
| VF (typ.) | 0.51 V - Typical forward voltage drop at 10 A and 125 °C, directly determining conduction loss in high-current paths |
| Tj (max.) | 175 °C - Maximum allowable junction temperature, enabling under-hood deployment without derating |
| Rth(j-c) | 2.5 °C/W - Junction-to-case thermal resistance, enabling accurate heatsink sizing for thermal management |
| IR (max.) | 23 mA - Maximum reverse leakage at 125 °C and VR = VRRM, critical for low-power standby efficiency |
| IFSM | 210 A - Non-repetitive surge current (10 ms sine), supporting load dump and transient overload resilience |
Pinout & Package
STPS1045SFY is housed in PSMC (TO-277A) surface-mount package with two anode terminals and one cathode terminal. The package features wettable flanks for solder joint inspection and is rated for 90 mg unit weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 / Anode 2 | Parallel-connected input terminals | Internally shorted anodes reduce effective series resistance and improve current sharing in high-current paths |
| Cathode | Output terminal | Single cathode connection simplifies PCB layout and supports freewheeling or reverse polarity protection topology |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity, and mechanical shock per JESD47 |
| Wettable flanks | Side-plated terminals enable automated optical inspection (AOI) of solder fillets without X-ray |
| Avalanche capability | 172 W peak avalanche power (10 µs pulse, Tj = 125 °C), supporting inductive load switching robustness |
| ECOPACK®2 compliance | Halogen-free, RoHS-compliant construction with lead-free termination and no antimony trioxide |
| High-temperature operation | Full electrical specs guaranteed up to 175 °C junction temperature, eliminating need for thermal derating |
Applications
| DC/DC Converters | Reverse Polarity Protection |
|---|---|
Use Scenario: High-efficiency 12 V–48 V bidirectional DC/DC stages in 48 V mild hybrid systems. IC Role / Device Role / Timing Role: Output rectifier replacing synchronous MOSFETs where low VF and zero reverse recovery are prioritized. Use Value: 0.51 V VF at 10 A reduces conduction loss by ~30% vs. comparable Si diodes, improving converter efficiency at light-to-moderate loads. |
Use Scenario: Input protection for ADAS domain controllers exposed to battery reversal during service. IC Role / Device Role / Timing Role: Series-blocking Schottky placed between battery feed and system input rail. Use Value: 45 V VRRM withstands jump-start transients; 175 °C Tj(max) ensures reliability in engine bay mounting locations. |
| Freewheeling Diodes | Switching Diodes |
Use Scenario: Inductive load drivers in electric power steering (EPS) motor control modules. IC Role / Device Role / Timing Role: Freewheeling path for H-bridge flyback energy during PWM dead-time. Use Value: Negligible switching losses eliminate reverse recovery spikes, reducing EMI and gate driver stress. |
Use Scenario: High-speed clamping in CAN FD physical layer interfaces subject to ESD and load dump. IC Role / Device Role / Timing Role: Low-capacitance (typ. <1000 pF at 0 V) clamp diode on signal lines. Use Value: Low capacitance preserves signal integrity up to 5 Mbps; AEC-Q101 rating ensures functional safety compliance. |
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-10BQ045-M3 | Same 45 V VRRM, 10 A IF(AV), but VF = 0.55 V (typ., 10 A, 125 °C); Rth(j-c) = 3.0 °C/W | Lacks AEC-Q101 qualification and wettable flanks; not PPAP-capable | Acceptable for industrial DC/DC where automotive qualification is not required |
| ON Semiconductor SB1045-T | 45 V VRRM, 10 A IF(AV), VF = 0.60 V (typ., 10 A, 25 °C); Tj(max) = 150 °C | No avalanche rating; no wettable flanks; ECOPACK not specified | Suitable for cost-sensitive non-automotive freewheeling, but not for under-hood reverse polarity protection |
Compared with VS-10BQ045-M3 and SB1045-T, STPS1045SFY delivers lower VF, higher Tj(max), verified avalanche robustness, and full automotive process controls-making it the only option qualified for PPAP and wettable-flank AOI in safety-critical vehicle subsystems.
Availability
STPS1045SFY is available at Aetrix Electronics and suitable for automotive DC/DC converters, reverse polarity protection circuits, and freewheeling diode applications requiring stable component supply, long-term lifecycle assurance, and AEC-Q101 traceability.
Supply support for STPS1045SFY 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 microcontrollers, power devices, sensors, and analog ICs for automotive, industrial, and consumer markets.
STPS1045SFY belongs to ST's automotive-qualified Schottky rectifier product line, engineered specifically for high-temperature, high-reliability power conversion in engine control units, ADAS modules, and 48 V electrification systems.
FAQ
Is STPS1045SFY pin-compatible with standard TO-277 devices?
No-STPS1045SFY uses the PSMC (TO-277A) variant, which has distinct mechanical dimensions and wettable flank plating. While footprint-compatible with TO-277, the side-terminal plating requires AOI-specific stencil and reflow profile adjustments. Refer to Figure 8 and Table 4 in DS12668 for exact land pattern tolerances.
What is the maximum recommended case temperature for continuous operation?
The datasheet specifies IF(AV) = 10 A at Tc = 140 °C with δ = 0.5. Operation above 140 °C case temperature requires derating per Figure 1; at Tc = 150 °C, IF(AV) drops to ~8.5 A. Thermal design must maintain Tc ≤ 140 °C to sustain rated current without exceeding 175 °C Tj.
Does STPS1045SFY support bidirectional current flow?
No-it is a unidirectional Schottky rectifier. Current flows only from anode(s) to cathode. Reverse conduction is blocked up to 45 V VRRM; attempting reverse bias beyond this risks permanent breakdown. It is not designed for AC or bidirectional switching applications.
How is avalanche capability tested and rated?
Avalanche energy is validated per JEDEC JESD24-11 using 10 µs pulses at Tj = 125 °C, yielding 172 W peak power. This rating reflects single-pulse survivability-not repetitive operation. Designers must ensure system-level clamping limits total avalanche energy per event to avoid cumulative degradation.
STPS1045SFY 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-277A (SMPC)
- Operating Temperature - Junction:
- -40°C ~ 175°C
STPS1045SFY FAQ
1.How can I place an order for STPS1045SFY through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS1045SFY 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 STPS1045SFY reliable?
The price and inventory of STPS1045SFY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS1045SFY is usually 5 days.
3.What payment methods are accepted for STPS1045SFY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS1045SFY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS1045SFY?
STPS1045SFY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS1045SFY 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 STPS1045SFY?
For technical support, including STPS1045SFY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS1045SFY requirements.
6.How does Aetrix verify that STPS1045SFY is sourced from the original manufacturer or authorized distributors?
All STPS1045SFY 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 STPS1045SFY meets industry standards.
7.What is the process for return or replacement of STPS1045SFY?
All STPS1045SFY units undergo pre-shipment inspection (PSI). If there is an issue with STPS1045SFY, 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 STPS1045SFY part is unused and in its original packaging.
Return procedure for STPS1045SFY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS1045SFY Tags
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