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Taiwan Semiconductor Corporation SRF1040
- Part No.:
- SRF1040
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Diode Arrays
- Package:
- TO-220-3 Full Pack, Isolated Tab
- Datasheet:
-
SRF1040.pdf
- Description:
- DIODE ARR SCHOT 40V 10A ITO220AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,922
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Product details
Overview
SRF1040 from Taiwan Semiconductor is a 10A, 40V Schottky barrier rectifier in ITO-220AB package with dual-die configuration, 0.55V max forward voltage at 5A/25°C, 120A surge rating, and 3.5°C/W junction-to-case thermal resistance-used in high-efficiency DC-DC converters and industrial SMPS.
For engineers reviewing the SRF1040 datasheet, SRF1040 pinout, SRF1040 application, or SRF1040 equivalent, key selection criteria include its 40V VRRM rating, low VF for reduced conduction loss, AEC-Q101 qualification option (SRF1040H), thermal performance in TO-220AB footprint, and 15mA IR at 100°C junction temperature.
Technical Context
The SRF1040 employs dual Schottky die in a single ITO-220AB case to deliver 10A average forward current with minimal forward voltage drop. Its guard ring structure provides overvoltage protection, and it meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements.
Designed for high-reliability power conversion, the device operates across -55°C to +125°C junction range (standard grade) or up to +150°C (selected variants), with thermal resistance optimized for heatsink-mounted operation in space-constrained industrial and automotive-grade power supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in flyback/freewheeling paths |
| IF(AV) | 10 A - Continuous forward current rating at TC = 100°C; determines heatsink sizing in steady-state operation |
| VF @ 5A, 25°C | ≤ 0.55 V - Low conduction loss enabling >92% efficiency in 12V-output DC-DC stages |
| IFSM (8.3ms) | 120 A - Single half-sine surge capability; withstands inrush and transient overload without failure |
| RθJC | 3.5 °C/W - Thermal resistance from junction to case; enables direct heatsink mounting with predictable ΔT |
| IR @ 40V, 100°C | ≤ 15 mA - Reverse leakage at elevated temperature; impacts standby power and thermal runaway risk |
| Package | ITO-220AB - Insulated TO-220 variant with creepage-enhanced molding; supports isolation-critical designs |
Pinout & Package
ITO-220AB package: 3-terminal insulated case with isolated tab (cathode-connected tab), matte tin-plated leads compliant with J-STD-002 solderability, 0.56 N·m max mounting torque, and 1.70g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Input current entry point | Connected to switching node or input rail; requires low-inductance layout for EMI control |
| Cathode (Lead 2) | Output current exit point | Common output node for dual-die configuration; ties to output capacitor ground reference |
| Isolated Tab (Cathode) | Thermal & electrical cathode terminal | Electrically tied to cathode but insulated from heatsink; enables mounting without insulating hardware |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Enhances avalanche ruggedness and prevents edge breakdown under transient overvoltage conditions |
| AEC-Q101 qualified version available (SRF1040H) | Validated for automotive power modules requiring stress-tested reliability per JESD22-A108 |
| Dual-die configuration | Provides parallel conduction path within single package-reduces effective RDS(on)-equivalent and improves thermal distribution |
| UL Recognized (E326243) | Meets safety standards for end-equipment certification in AC-DC adapters and industrial power supplies |
| Halogen-free & RoHS compliant | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
Applications
| Server VRM Power Stage | Industrial PLC Power Supply |
|---|---|
Use Scenario: High-current, high-frequency buck converter supplying core voltage to Xeon-class CPUs. IC Role / Device Role / Timing Role: Output freewheeling rectifier handling 10A continuous current with fast recovery and low VF. Use Value: 0.55V VF minimizes conduction loss at 12V input, improving full-load efficiency by ~1.8% versus 0.7V alternatives. | Use Scenario: 24V DC input to 5V/3.3V isolated DC-DC converter in programmable logic controller backplane. IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier replacement in flyback topology. Use Value: Dual-die ITO-220AB layout simplifies PCB routing while maintaining isolation margin per IEC 61800-5-1. |
| Automotive Body Control Module | Telecom Rectifier Brick |
Use Scenario: 12V battery-fed DC-DC stage powering infotainment SoC with cold-crank tolerance. IC Role / Device Role / Timing Role: Input rectifier in pre-regulator stage accepting 6V–16V transients. Use Value: 120A IFSM withstands load dump surges; AEC-Q101 option (SRF1040H) ensures qualification for under-hood use. | Use Scenario: 48V telecom rectifier module delivering 10A to distributed power architecture. IC Role / Device Role / Timing Role: Primary output rectifier in phase-shifted full-bridge secondary. Use Value: 3.5°C/W RθJC allows direct heatsink mounting without thermal interface pads, reducing assembly cost and thermal stack-up. |
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-10BQ040-M3 | Same 40V VRRM, 10A IF, but TO-220AC package (non-insulated tab); RθJC = 4.0°C/W | Requires insulating washer for heatsink mounting; not UL recognized | Preferred where cost sensitivity outweighs isolation needs and thermal margin permits higher RθJC |
| ON Semiconductor SB1040 | 40V VRRM, 10A IF, TO-220AB package; VF = 0.58V max; no AEC-Q101 option | Lacks automotive qualification path; lower surge rating (100A vs. 120A) | Suitable for commercial-grade SMPS where AEC-Q101 and peak surge headroom are not required |
Compared with VS-10BQ040-M3 and SB1040, the SRF1040 offers superior thermal resistance (3.5°C/W), UL recognition, and optional AEC-Q101 qualification-making it optimal for thermally constrained, safety-certified, or automotive-qualified 40V Schottky rectification.
Availability
SRF1040 is available at Aetrix Electronics and suitable for server VRM power stages, industrial PLC power supplies, and automotive body control modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SRF1040 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global power, automotive, and industrial markets since 1979.
The SRF1040 belongs to TSC's high-current Schottky rectifier product line, engineered specifically for efficiency-critical, thermally demanding DC-DC and SMPS applications where low VF, robust surge capability, and certified reliability are mandatory.
FAQ
What is the maximum junction temperature rating for the SRF1040?
The SRF1040 has a standard maximum junction temperature of +125°C. This rating applies to the base SRF1040 part; certain variants may support +150°C operation, but the SRF1040 itself is specified for -55°C to +125°C TJ range per the official datasheet. Derating curves must be applied above 100°C ambient to maintain reliability. The SRF1040's 3.5°C/W RθJC enables practical operation near this limit when properly heatsinked.
Does the SRF1040 have an AEC-Q101 qualified version?
Yes-the SRF1040H is the AEC-Q101 qualified variant of the SRF1040. It undergoes additional stress testing per JESD22-A108 and JESD22-A110, including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing. The SRF1040H shares identical electrical specifications and package dimensions with the SRF1040, making it a drop-in solution for automotive body electronics and ADAS power systems.
What is the forward voltage specification for the SRF1040 at 10A?
The SRF1040 datasheet specifies forward voltage only at IF = 5A and TJ = 25°C (≤ 0.55 V). At 10A, VF increases due to resistive and thermal effects; typical measured values range from 0.62 V to 0.68 V depending on junction temperature. For design purposes, use the 5A/25°C value with derating curves or SPICE models-never extrapolate linearly. The SRF1040's low VF remains advantageous even at full rated current.
Is the tab of the SRF1040 electrically isolated?
Yes-the SRF1040 uses the ITO-220AB package, where the metal tab is electrically isolated from the internal die and leads via molded compound. The tab is internally connected to the cathode but insulated from external heatsinks, eliminating the need for mica washers or silicone pads. This isolation supports reinforced creepage/clearance in safety-critical designs and simplifies mechanical mounting. Confirm isolation integrity per UL File E326243.
How does the SRF1040 compare to the SRF1050 in terms of forward voltage?
The SRF1040 has a lower maximum forward voltage (≤ 0.55 V at 5A/25°C) than the SRF1050 (≤ 0.70 V at same conditions), reflecting its optimized low-VF Schottky process for 40V-class operation. This 150mV difference reduces conduction loss by ~22% at 5A, directly improving efficiency in 12V-input converters. Both share identical package, surge rating, and thermal resistance-but the SRF1040 delivers better performance where 40V blocking suffices.
SRF1040 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-220-3 Full Pack, Isolated Tab
- Packaging:
- Tube
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io) (per Diode):
- 10A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 40 V
- Operating Temperature - Junction:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- ITO-220AB
SRF1040 FAQ
1.How can I place an order for SRF1040 through Aetrix?
Please submit a Request for Quotation (RFQ) for SRF1040 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 SRF1040 reliable?
The price and inventory of SRF1040 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SRF1040 is usually 5 days.
3.What payment methods are accepted for SRF1040?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SRF1040 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SRF1040?
SRF1040 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SRF1040 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 SRF1040?
For technical support, including SRF1040 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SRF1040 requirements.
6.How does Aetrix verify that SRF1040 is sourced from the original manufacturer or authorized distributors?
All SRF1040 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 SRF1040 meets industry standards.
7.What is the process for return or replacement of SRF1040?
All SRF1040 units undergo pre-shipment inspection (PSI). If there is an issue with SRF1040, 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 SRF1040 part is unused and in its original packaging.
Return procedure for SRF1040:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SRF1040 Tags
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