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STMicroelectronics STPS3045FP
- Part No.:
- STPS3045FP
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-220-2 Full Pack
- Datasheet:
-
STPS3045FP.pdf
- Description:
- DIODE SCHOTTKY 45V 30A TO220FPAC
- Quantity:
- Payment:
- Shipping:
Inventory:8,835
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Product details
Overview
STPS3045FP from STMicroelectronics is a 45 V, 30 A average forward current power Schottky rectifier in TO-220FPAC package, optimized for low-voltage, high-frequency DC-DC converters and SMPS secondary-side rectification. It delivers 0.51 V typical forward voltage at 30 A and 125 °C, with 4.0 °C/W junction-to-case thermal resistance and specified avalanche capability up to 12.5 kW (1 µs pulse).
For engineers reviewing the STPS3045FP datasheet, STPS3045FP pinout, STPS3045FP application, or STPS3045FP equivalent, key selection criteria include conduction loss modeling (P = 0.42×IF(AV) + 0.0050×IF²(RMS)), thermal derating above 85 °C case temperature, reverse leakage behavior at 125 °C, and compatibility with TO-220FPAC heatsink mounting in compact power supplies.
Technical Context
This Schottky rectifier uses a planar metal-silicon junction structure enabling negligible switching losses and extremely fast recovery-no minority-carrier storage delay. Its low VF and high IF(AV) rating support high-efficiency, high-density 12 V/24 V output stages in isolated flyback and forward converters.
Thermal design is enabled by direct metal tab mounting (TO-220FPAC), with Rth(j-c) = 4.0 °C/W and Tj(max) = 175 °C. Avalanche energy rating (12.5 kW @ 1 µs) allows robust operation under transient overvoltage conditions without external snubbers in free-wheeling configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum repetitive reverse blocking voltage; defines safe operating range in 36 V nominal bus applications. |
| IF(AV) | 30 A at δ = 0.5, Tc = 85 °C - Continuous DC output current capability with standard heatsinking. |
| VF (max) | 0.57 V at 30 A, 125 °C - Directly determines conduction loss and thermal load in high-current paths. |
| Rth(j-c) | 4.0 °C/W - Enables precise junction temperature estimation when mounted on a heatsink with known thermal interface resistance. |
| IFSM | 300 A (10 ms sine) - Supports surge tolerance during startup or short-circuit events in industrial power supplies. |
| IR (max) | 60 mA at 125 °C, VR = 45 V - Critical for standby power budgeting and reverse-bias leakage in polarity protection circuits. |
Pinout & Package
TO-220FPAC package with insulated tab, 3-pin configuration: Anode (pin 1), Cathode (pin 2), and electrically isolated metal tab (pin 3, thermal path only). Epoxy meets UL94 V0; lead-free compliant per ECOPACK® standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Main current entry point; connects to input/high-side node in freewheeling or polarity protection topologies. |
| Pin 2 | Cathode | Main current exit point; ties to ground or return path; carries full load current in synchronous rectifier replacement roles. |
| Metal Tab | Thermal Drain / Isolated Case | Electrically isolated mechanical mounting surface; requires no insulating washer but must be thermally coupled to heatsink. |
Key Features
| Feature | Design Value |
|---|---|
| Very small conduction losses | 0.51 V VF typ. @ 30 A/125 °C enables >94% efficiency in 12 V output SMPS at full load. |
| Negligible switching losses | No reverse recovery charge (Qrr ≈ 0) eliminates switching loss and EMI in >100 kHz DC-DC stages. |
| Low thermal resistance | Rth(j-c) = 4.0 °C/W supports 30 A operation with ≤60 °C temperature rise above heatsink. |
| Avalanche capability specified | 12.5 kW peak avalanche power (1 µs) permits reliable operation during inductive turn-off transients without clamping diodes. |
Applications
| Server PSU Secondary Rectification | Industrial DC-DC Converter Output Stage |
|---|---|
Use Scenario: 12 V/20 A output rectification in 80 PLUS Titanium-certified server power supplies. IC Role / Device Role / Timing Role: Primary unidirectional power switch replacing MOSFET-based synchronous rectifiers where gate drive complexity is undesirable. Use Value: Eliminates gate driver IC and timing control circuitry while maintaining <0.6 V forward drop at full load and 175 °C junction survival during transient overload. | Use Scenario: Output rectification in 24 V input, 5 V/30 A isolated forward converter for PLC I/O modules. IC Role / Device Role / Timing Role: Freewheeling diode across transformer secondary winding during main switch off-time. Use Value: Zero reverse recovery prevents voltage spikes across primary switch and reduces EMI filter size by >30% versus fast recovery diodes. |
| Automotive Body Control Module Power Input | Polarity Protection in Telecom Power Shelf |
Use Scenario: Reverse polarity protection at 12 V battery input of BCM with 15 A continuous load. IC Role / Device Role / Timing Role: Series-connected anode-in configuration blocking reverse battery connection. Use Value: 0.51 V VF at 15 A limits insertion loss to <7.7 W, avoiding thermal runaway even at 85 °C ambient with minimal heatsinking. | Use Scenario: Input polarity guard in 48 V telecom shelf power distribution unit handling 25 A per rail. IC Role / Device Role / Timing Role: Low-loss series-blocking element placed before bulk capacitors and downstream DC-DC stages. Use Value: 60 mA IR max at 125 °C ensures <1.5 W standby dissipation in hot chassis environments, preserving MTBF targets. |
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-30CPH045 | Same VRRM (45 V), higher IF(AV) = 35 A, VF = 0.55 V @ 30 A/125 °C, TO-247AC package. | Larger footprint; requires different heatsink interface; better suited for higher ambient or forced-air-cooled systems. | Select when >30 A margin or lower thermal resistance (<3.0 °C/W) is required despite larger board area. |
| ON Semiconductor MBR3045CT | 45 V, 30 A dual common-cathode configuration; VF = 0.65 V @ 30 A/125 °C; TO-220AB package with electrically connected tab. | Non-isolated tab demands insulating hardware; dual-diode layout suits center-tapped transformer designs. | Choose for cost-sensitive dual-output supplies or where shared cathode simplifies PCB routing, accepting higher VF and isolation constraints. |
Compared with VS-30CPH045 and MBR3045CT, STPS3045FP offers the lowest VF at high temperature in an electrically isolated TO-220FPAC package-ideal for space-constrained, single-output SMPS where thermal interface simplicity and conduction loss minimization are prioritized over dual-diode functionality or ultra-high current headroom.
Availability
STPS3045FP is available at Aetrix Electronics and suitable for server power supplies, industrial DC-DC converters, automotive body control modules, and telecom power shelf designs requiring stable component supply and long-term manufacturability.
Supply support for STPS3045FP 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.
STPS3045FP belongs to ST's Power Schottky Rectifier product line, engineered specifically for high-efficiency, high-frequency power conversion in space- and thermally-constrained applications where low VF and robust avalanche performance are critical.
FAQ
Is STPS3045FP suitable for synchronous rectification replacement?
Yes-STPS3045FP is widely used to replace synchronous rectifiers in cost-sensitive or layout-constrained 12–24 V output SMPS. Its 0.51 V VF at 30 A/125 °C and zero Qrr eliminate gate drive complexity while maintaining efficiency within 1–2% of MOSFET-based solutions below 200 kHz switching frequency.
What is the maximum recommended case temperature for continuous 30 A operation?
The datasheet specifies IF(AV) = 30 A at Tc = 85 °C with duty cycle δ = 0.5. For continuous DC operation (δ = 1), derating is required: at Tc = 70 °C, IF(AV) remains ~28 A; at Tc = 100 °C, it drops to ~22 A. Thermal design must ensure Tc ≤ 85 °C under worst-case ambient and airflow conditions.
Does the TO-220FPAC package require an insulating washer during heatsink mounting?
No-the TO-220FPAC package features an electrically isolated metal tab. No insulating washer or pad is needed, simplifying mechanical assembly and improving thermal contact. The tab is connected only to the cathode internally, so mounting directly to grounded heatsinks is electrically safe when cathode is at system ground potential.
How does STPS3045FP perform under repetitive avalanche stress?
STPS3045FP is fully rated for repetitive avalanche with PARM = 12.5 kW at tp = 1 µs and Tj = 25 °C. Derating curves (Figure 3 and Figure 4) show usable energy down to 50% of rated value at tp = 10 µs and Tj = 125 °C. This enables reliable use in freewheeling and inductive clamp applications without external protection components.
STPS3045FP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-220-2 Full Pack
- Packaging:
- Tube
- Product Status:
- Obsolete
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io):
- 30A
- Voltage - Forward (Vf) (Max) @ If:
- 620 mV @ 30 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 300 µA @ 45 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220FPAC
- Operating Temperature - Junction:
- 175°C (Max)
STPS3045FP FAQ
1.How can I place an order for STPS3045FP through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS3045FP 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 STPS3045FP reliable?
The price and inventory of STPS3045FP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS3045FP is usually 5 days.
3.What payment methods are accepted for STPS3045FP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS3045FP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS3045FP?
STPS3045FP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS3045FP 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 STPS3045FP?
For technical support, including STPS3045FP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS3045FP requirements.
6.How does Aetrix verify that STPS3045FP is sourced from the original manufacturer or authorized distributors?
All STPS3045FP 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 STPS3045FP meets industry standards.
7.What is the process for return or replacement of STPS3045FP?
All STPS3045FP units undergo pre-shipment inspection (PSI). If there is an issue with STPS3045FP, 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 STPS3045FP part is unused and in its original packaging.
Return procedure for STPS3045FP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS3045FP Tags
-
1N4448X-TP
Micro Commercial Co
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1N4148WX-TP
Micro Commercial Co
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1N4148TR
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BAS16HT1G
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1N914BWT
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LL4148
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MMSD914T1G
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BAV21W-7-F
Diodes Incorporated
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