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STMicroelectronics STPS1545FP
- Part No.:
- STPS1545FP
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-220-2 Full Pack
- Datasheet:
-
STPS1545FP.pdf
- Description:
- DIODE SCHOTTKY 45V 15A TO220FPAC
- Quantity:
- Payment:
- Shipping:
Inventory:10,035
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Product details
Overview
STPS1545FP from STMicroelectronics is a 45 V, 15 A average forward current power Schottky rectifier in insulated TO-220FPAC package, designed for low-voltage, high-frequency DC/DC converters and free-wheeling applications. It features 0.5 V typical forward voltage at 15 A and 125 °C, 2000 VRMS insulation rating, and specified avalanche capability up to 430 W peak.
For engineers reviewing the STPS1545FP datasheet, STPS1545FP pinout, STPS1545FP application, or STPS1545FP equivalent, key selection criteria include conduction loss optimization (P = 0.42 × IF(AV) + 0.01 × IF²(RMS)), thermal resistance (Rth(j-c) = 4.0 °C/W), junction temperature limit (175 °C), and insulating package compliance for safety-critical power stages.
Technical Context
This Schottky rectifier operates with negligible switching losses and extremely fast recovery-no minority-carrier storage delay-making it ideal for synchronous rectification and high-frequency (>100 kHz) SMPS topologies. Its low VF and high IF(AV) enable efficient operation in compact, thermally constrained designs.
The TO-220FPAC package provides 2000 VRMS isolation between case and die, eliminating need for additional insulating hardware in grounded heatsink configurations. Avalanche energy rating (PARM = 430 W at tp = 10 µs, Tj = 125 °C) supports robustness against inductive transients in motor drive and converter freewheeling paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum reverse blocking voltage; defines safe operating range in buck, flyback, and LLC secondary-side rectification. |
| IF(AV) | 15 A at TC = 130 °C - Continuous forward current rating under real thermal mounting conditions; determines heatsink sizing. |
| VF (typ.) | 0.5 V at IF = 15 A, Tj = 125 °C - Low conduction loss enables >95% efficiency in 5–12 V output converters. |
| Rth(j-c) | 4.0 °C/W - Junction-to-case thermal resistance; used with heatsink Rth(c-a) to calculate max ambient temperature for 175 °C Tj. |
| IR (max) | 40 mA at VR = 45 V, Tj = 125 °C - Reverse leakage impacts standby power and thermal runaway risk in parallel configurations. |
| IFSM | 220 A (10 ms sine) - Surge current capability supports inrush and fault conditions without bond wire fusing. |
| PARM | 430 W (10 µs pulse, Tj = 125 °C) - Peak avalanche power rating ensures survivability during inductive switch-off events. |
Pinout & Package
STPS1545FP uses the TO-220FPAC package: insulated plastic housing with metal tab (cathode), three leads (anode, cathode, isolated tab), and 2000 VRMS isolation between tab and internal die. Mounting torque: 0.55 N·m (recommended), max 0.7 N·m.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Input current terminal | Connected to source of power stage (e.g., MOSFET drain in buck); carries full load current into device. |
| Cathode (Lead 2) | Output current terminal | Connected to output rail or ground return path; low-VF drop minimizes conduction loss in high-current paths. |
| Isolated Tab (Metal surface) | Thermal interface / mechanical ground | Electrically isolated from die; mounted directly to heatsink without mica washer; enables simplified thermal management. |
Key Features
| Feature | Design Value |
|---|---|
| Insulated TO-220FPAC package | 2000 VRMS isolation eliminates need for insulating hardware and reduces BOM count in safety-compliant AC/DC and industrial supplies. |
| Low VF (0.5 V typ. @ 15 A) | Reduces conduction loss by ~30% vs. standard silicon diodes, enabling higher efficiency in 5–24 V DC/DC outputs. |
| Avalanche-rated (430 W PARM) | Withstands repetitive inductive energy spikes without degradation-critical for motor drive freewheeling and transformer reset. |
| ECOPACK®2 compliance | Meets RoHS, halogen-free, and lead-free soldering requirements for automotive and industrial end equipment. |
| 175 °C max junction temperature | Supports operation in high-ambient environments (e.g., enclosed power modules) with reduced derating versus 150 °C alternatives. |
Applications
| Server VRM | Industrial DC/DC Converter |
|---|---|
Use Scenario: Point-of-load regulation for CPU/GPU core voltages (0.8–1.8 V) in 1U servers. IC Role / Device Role: Secondary-side synchronous rectifier replacing MOSFETs in multiphase buck converters. Use Value: Lower gate-drive complexity and zero reverse recovery loss compared to Si MOSFETs at <1 MHz switching. |
Use Scenario: 24 V input to ±15 V dual-output isolated DC/DC for PLC I/O modules. IC Role / Device Role: Freewheeling diode across primary-side snubber and secondary-side output rectification. Use Value: 40 mA max IR at 125 °C prevents thermal runaway in sealed enclosures with limited airflow. |
| Solar Microinverter | Automotive ADAS Power Supply |
Use Scenario: High-frequency (150–300 kHz) boost stage in single-phase microinverters (200–400 V DC input). IC Role / Device Role: Input boost rectifier handling 12–15 A continuous current with minimal conduction loss. Use Value: 0.5 V VF at 125 °C maintains >97% conversion efficiency across -40 to +105 °C ambient range. |
Use Scenario: 12 V battery-fed 5 V/3.3 V power rails for radar ECU and camera modules. IC Role / Device Role: Polarity protection and reverse-battery safeguard on main input rail. Use Value: 220 A IFSM withstands jump-start surges; 2000 VRMS isolation meets ISO 16750-2 transient immunity requirements. |
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-15SQ045 | Same VRRM (45 V), IF(AV) = 15 A, but Rth(j-c) = 3.0 °C/W (TO-220AC, non-insulated); no avalanche rating. | Requires insulating pad for grounded heatsinks; unsuitable for high-reliability avalanche-prone circuits like motor drives. | Select only when isolation is handled externally and surge robustness is not required. |
| ON Semiconductor MBR1545CT | Dual common-cathode configuration (2×7.5 A), VF = 0.65 V (typ.), TO-220AB package; no insulation or avalanche spec. | Designed for dual-rail outputs; lacks 2000 VRMS isolation and single-device surge margin for freewheeling. | Prefer for cost-sensitive dual-output supplies where isolation and avalanche are not design constraints. |
Compared with VS-15SQ045 and MBR1545CT, STPS1545FP uniquely combines certified insulation, avalanche energy rating, and thermal performance in a single-diode TO-220FPAC form factor-enabling simplified, safety-compliant, and transient-robust power stage designs.
Availability
STPS1545FP is available at Aetrix Electronics and suitable for server VRMs, industrial DC/DC converters, solar microinverters, and automotive ADAS power supplies requiring stable component supply and long-term lifecycle support.
Supply support for STPS1545FP 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, specializing in power management, analog, microcontrollers, and automotive-grade ICs.
ST's Power Schottky Rectifier product line targets high-efficiency, high-reliability power conversion in computing, industrial, renewable energy, and automotive systems-emphasizing low VF, rugged packaging, and extended temperature operation.
FAQ
What is the maximum recommended mounting torque for STPS1545FP?
The recommended torque value for STPS1545FP's TO-220FPAC package is 0.55 N·m. The absolute maximum allowable torque is 0.7 N·m. Exceeding this may deform the package or compromise internal die attachment, leading to increased thermal resistance or premature failure under thermal cycling.
Can STPS1545FP be used in parallel configurations?
Yes, but only with matched VF devices and individual current-sharing resistors. Due to its positive temperature coefficient of VF, STPS1545FP exhibits inherent current balancing-but mismatched units or unequal thermal paths can cause uneven loading. IR ≤ 40 mA at 125 °C must be verified per unit to avoid thermal runaway.
Does STPS1545FP require a heatsink in all applications?
A heatsink is required whenever power dissipation exceeds 1.5 W at ambient temperatures above 50 °C. With Rth(j-c) = 4.0 °C/W and max Tj = 175 °C, even at 15 A and VF = 0.57 V (max), junction temperature rises ~34 °C above case-so case-to-ambient thermal design remains critical for sustained operation.
How does the TO-220FPAC insulation affect PCB layout?
The TO-220FPAC's 2000 VRMS isolation allows direct mounting of the metal tab to a grounded heatsink without insulating hardware-reducing layer count and via count in high-voltage isolation barriers. However, the anode lead must maintain ≥2.5 mm creepage distance from any grounded copper pour per IEC 62368-1.
STPS1545FP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-220-2 Full Pack
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io):
- 15A
- Voltage - Forward (Vf) (Max) @ If:
- 840 mV @ 30 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 200 µA @ 45 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220FPAC
- Operating Temperature - Junction:
- 175°C (Max)
STPS1545FP FAQ
1.How can I place an order for STPS1545FP through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS1545FP 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 STPS1545FP reliable?
The price and inventory of STPS1545FP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS1545FP is usually 5 days.
3.What payment methods are accepted for STPS1545FP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS1545FP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS1545FP?
STPS1545FP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS1545FP 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 STPS1545FP?
For technical support, including STPS1545FP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS1545FP requirements.
6.How does Aetrix verify that STPS1545FP is sourced from the original manufacturer or authorized distributors?
All STPS1545FP 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 STPS1545FP meets industry standards.
7.What is the process for return or replacement of STPS1545FP?
All STPS1545FP units undergo pre-shipment inspection (PSI). If there is an issue with STPS1545FP, 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 STPS1545FP part is unused and in its original packaging.
Return procedure for STPS1545FP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS1545FP Tags
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1N4448X-TP
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1N4148WX-TP
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BAV21W-7-F
Diodes Incorporated
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