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Taiwan Semiconductor Corporation SK315AH
- Part No.:
- SK315AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SK315AH.pdf
- Description:
- DIODE SCHOTTKY 150V 3A DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,128
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Product details
Overview
SK315AH from Taiwan Semiconductor is a 3A, 150V Schottky barrier surface-mount rectifier in DO-214AC (SMA) package, featuring 0.95V forward voltage at 3A/25°C, 100μA reverse leakage at 25°C, and AEC-Q101 qualification for automotive use. It serves as a freewheeling or reverse-battery protection diode in DC/DC converters and car lighting systems.
For engineers reviewing the SK315AH datasheet, SK315AH pinout, SK315AH application, or SK315AH equivalent, key selection criteria include its 150V VRRM, low VF stability across temperature, high IFSM of 70A, and moisture sensitivity level 1 compliance for reflow compatibility.
Technical Context
The SK315AH uses a single-die Schottky junction optimized for low forward conduction loss and fast switching with no minority-carrier storage delay. Its guard ring structure enhances over-voltage ruggedness while maintaining tight thermal resistance (RθJL = 25°C/W).
Designed for high-frequency operation up to several hundred kHz, it delivers stable reverse leakage (<0.5mA at 125°C) and supports surge currents up to 70A (8.3ms half-sine), making it suitable for transient-heavy automotive power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 150 V - Maximum repetitive reverse voltage; defines safe blocking capability in 12–48V automotive systems. |
| IF | 3 A - Continuous forward current rating; supports sustained load in compact DC/DC converter outputs. |
| VF @ 3A, 25°C | 0.95 V - Low conduction loss enables >92% efficiency in 5–12V buck stages at full load. |
| IR @ 150V, 25°C | 100 μA - Minimal leakage preserves battery standby life in reverse-battery protection circuits. |
| IFSM | 70 A - Peak surge rating handles cold-crank transients and load-dump events without failure. |
| TJ max | 150 °C - Enables operation in under-hood environments with minimal derating. |
| RθJL | 25 °C/W - Efficient heat transfer to PCB copper improves thermal margin in space-constrained layouts. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single anode–cathode configuration with cathode band marking. Weight: 0.070 g. Moisture sensitivity level: 1 (per J-STD-020).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to input/source side in freewheeling or reverse-polarity protection topologies. |
| Cathode | Forward current exit / reverse-blocking terminal | Marked by band; ties to output/load or ground return path; blocks reverse current above 150V. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per stress test requirements. |
| Guard ring structure | Improves edge breakdown immunity, enabling stable 150V blocking without field plate or termination rings. |
| Matte tin-plated leads | Ensures solderability per J-STD-002 and eliminates whisker risk per JESD 201 Class 2. |
| Halogen-free & RoHS compliant | Meets EU Directive 2011/65/EU and IPC-4101D/93 for green manufacturing and end-of-life handling. |
Applications
| DC/DC Converter Output Rectification | Reverse Battery Protection |
|---|---|
Use Scenario: High-efficiency synchronous or asynchronous buck converter in automotive ADAS modules. IC Role / Device Role / Timing Role: Freewheeling diode providing low-loss current path during high-side switch off-time. Use Value: 0.95V VF minimizes conduction loss, improving thermal performance and enabling smaller heatsinking. | Use Scenario: Input protection circuit for infotainment head units exposed to accidental reverse battery connection. IC Role / Device Role / Timing Role: Series-blocking diode placed between battery feed and system input rail. Use Value: 150V VRRM withstands jump-start transients; 100μA IR prevents standby drain in parked vehicles. |
| Car Lighting Power Supply | Low-Voltage Inverter Freewheeling |
Use Scenario: LED driver power stage in exterior lighting where ambient temperature exceeds 105°C. IC Role / Device Role / Timing Role: Output rectifier in flyback or buck-boost topology powering 12–24V LED strings. Use Value: 150°C TJmax and <0.5mA IR at 125°C ensure reliability under hood-mounted lamp housings. | Use Scenario: Freewheeling path in 24V-to-400V boost inverters for electric power steering assist. IC Role / Device Role / Timing Role: Clamp diode managing inductive kickback from motor drive transformers. Use Value: 70A IFSM safely absorbs repetitive surge energy without degradation over lifetime. |
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-3EWH01-M3/5AT | Same DO-214AC package; 100V VRRM, 0.55V VF @ 3A - lower voltage, lower VF. | Not rated for 150V systems; unsuitable for 48V architectures or load-dump scenarios. | Select only if design operates ≤100V and prioritizes lowest conduction loss over surge margin. |
| ON Semiconductor SB3150-T | DO-214AC; 150V VRRM, 0.89V VF @ 3A, but not AEC-Q101 qualified. | Lacks automotive qualification; requires additional reliability validation for vehicle programs. | Acceptable for industrial DC/DC where AEC-Q101 is not mandated and slightly lower VF is critical. |
Compared with VS-3EWH01-M3/5AT and SB3150-T, the SK315AH uniquely combines 150V rating, AEC-Q101 qualification, and robust 70A surge capability-making it the preferred choice for automotive 12V/24V/48V power conversion where safety and longevity are non-negotiable.
Availability
SK315AH is available at Aetrix Electronics and suitable for automotive power management, DC/DC converter design, and reverse-polarity protection requiring stable component supply across production lifecycles.
Supply support for SK315AH 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 Company (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global automotive, industrial, and consumer markets since 1979.
The SK3xAH series was developed specifically for high-reliability automotive power rectification, emphasizing AEC-Q101 compliance, thermal robustness, and consistent parametric performance across temperature and lot variation.
FAQ
What is the maximum junction temperature rating for SK315AH?
The SK315AH has a maximum junction temperature (TJmax) of +150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet Version B2304. This allows reliable operation in under-hood automotive environments when mounted on adequately sized copper pads. Thermal derating begins above 25°C ambient, with forward current reduced linearly to zero at 150°C junction temperature. The SK315AH's RθJL of 25°C/W supports effective heat transfer to the PCB.
Is SK315AH suitable for reverse battery protection in 24V commercial vehicles?
Yes, the SK315AH is suitable for reverse battery protection in 24V commercial vehicles due to its 150V VRRM, AEC-Q101 qualification, and 100μA reverse leakage at 25°C. Its 70A IFSM withstands jump-start surges, and the guard ring structure improves ruggedness against transients. The SK315AH's DO-214AC package fits standard SMA footprints, and its 0.95V VF limits power dissipation during normal forward conduction in such applications.
Does SK315AH have halogen-free and RoHS-compliant construction?
Yes, the SK315AH is both halogen-free and RoHS compliant, as explicitly stated in the "Features" section of the Taiwan Semiconductor datasheet Version B2304. The molding compound meets UL 94V-0 flammability rating, and terminals are matte tin plated per J-STD-002. These attributes satisfy environmental compliance requirements for automotive and industrial electronics sold in EU, China, and North America markets. No exemptions or exceptions apply to the SK315AH construction.
What is the forward voltage of SK315AH at 3A and 125°C junction temperature?
The forward voltage (VF) of SK315AH at 3A and 125°C is not explicitly tabulated in the datasheet, but the typical VF curve (Fig.10) shows ~1.05V at 3A and 125°C for the SK315–320AH group. This increase from 0.95V at 25°C reflects positive temperature coefficient behavior inherent to Schottky diodes. Designers should use this value for worst-case thermal analysis in high-ambient applications such as engine control units or LED drivers.
Can SK315AH be used as a freewheeling diode in a 400kHz DC/DC converter?
Yes, the SK315AH is well-suited as a freewheeling diode in 400kHz DC/DC converters due to its Schottky architecture, which eliminates minority-carrier recovery delay and enables efficient high-frequency operation. Its low VF and fast switching minimize switching losses, and the datasheet confirms stable performance up to several hundred kHz. Layout best practices-such as minimizing trace inductance and using adequate copper area-should be followed to maintain efficiency and thermal stability for the SK315AH in such applications.
SK315AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 150 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 950 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 150 V
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SK315AH FAQ
1.How can I place an order for SK315AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SK315AH 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 SK315AH reliable?
The price and inventory of SK315AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK315AH is usually 5 days.
3.What payment methods are accepted for SK315AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK315AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK315AH?
SK315AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK315AH 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 SK315AH?
For technical support, including SK315AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK315AH requirements.
6.How does Aetrix verify that SK315AH is sourced from the original manufacturer or authorized distributors?
All SK315AH 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 SK315AH meets industry standards.
7.What is the process for return or replacement of SK315AH?
All SK315AH units undergo pre-shipment inspection (PSI). If there is an issue with SK315AH, 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 SK315AH part is unused and in its original packaging.
Return procedure for SK315AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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