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Taiwan Semiconductor Corporation SK315AHR3G
- Part No.:
- SK315AHR3G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SK315AHR3G.pdf
- Description:
- DIODE SCHOTTKY 150V 3A DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,837
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Product details
Overview
SK315AHR3G from Taiwan Semiconductor is a 3 A, 150 V Schottky barrier rectifier in DO-214AC (SMA) package, optimized for high-frequency DC/DC converters and reverse battery protection with low forward voltage (0.95 V at 3 A, 25°C) and high surge capability (70 A IFSM). It features AEC-Q101 qualification, halogen-free construction, and moisture sensitivity level 1.
For engineers reviewing the SK315AHR3G datasheet, SK315AHR3G pinout, SK315AHR3G application, or SK315AHR3G equivalent, key selection criteria include its 150 V VRRM rating, 0.95 V VF at rated current, 100 μA IR at 25°C, 0.5 mA IR at 125°C, and junction-to-lead thermal resistance of 25°C/W - all critical for automotive-grade power conversion reliability.
Technical Context
This discrete Schottky diode uses a single-die construction in a surface-mount DO-214AC package with cathode band polarity indication. Its guard ring structure provides over-voltage protection, and it meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity requirements.
The device operates across -55°C to +150°C junction temperature range, supports 10,000 V/μs dV/dt, and delivers stable reverse leakage performance: ≤100 μA at 25°C, ≤0.5 mA at 125°C under rated 150 V reverse bias - enabling robust operation in thermally demanding automotive lighting and power supply environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 150 V - maximum repetitive reverse voltage; defines safe blocking capability in 12–48 V automotive systems with transient margin |
| IF | 3 A continuous - average forward current rating at TA = 25°C; supports compact DC/DC converter output stages |
| VF @ 3 A, 25°C | 0.95 V - low conduction loss enables >92% efficiency in 5–12 V buck converters at full load |
| IR @ 150 V, 25°C | 100 μA - minimal leakage preserves battery standby life in reverse-polarity protection circuits |
| IFSM (8.3 ms) | 70 A - handles cold-crank surges and inductive turn-off spikes without failure |
| RθJL | 25°C/W - enables direct thermal coupling to PCB copper for passive cooling in space-constrained layouts |
Pinout & Package
Package: DO-214AC (SMA), molded plastic body per JEDEC DO-214 AC, matte tin-plated leads, cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to input/source side in freewheeling or reverse-battery protection configurations |
| Cathode | Forward current exit / reverse-blocking terminal | Marked by band; ties to load/ground in clamping or output rectification roles |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use including engine control, lighting, and infotainment power rails |
| Guard ring structure | Enhances ruggedness against voltage transients and improves long-term reliability in noisy 12 V systems |
| Moisture sensitivity level 1 | Eliminates bake requirements before SMT reflow, reducing manufacturing cost and process complexity |
| Halogen-free & RoHS compliant | Meets global environmental regulations and supports lead-free soldering processes (J-STD-002) |
Applications
| Automotive LED Lighting | 12 V DC/DC Buck Converter Output |
|---|---|
Use Scenario: High-brightness LED headlamp modules requiring reverse-polarity protection and low-loss freewheeling path. IC Role / Device Role / Timing Role: Discrete Schottky rectifier used as reverse battery protection diode and freewheeling element in synchronous buck topology. Use Value: 0.95 V VF minimizes heat generation in sealed lamp housings; 150 V VRRM accommodates load-dump transients up to ISO 7637-2 Pulse 5a. | Use Scenario: Secondary-side rectification in automotive ADAS camera power supplies operating from 12 V battery input. IC Role / Device Role / Timing Role: Output rectifier in non-synchronous buck regulator delivering 3.3 V/2 A to image sensor and ISP. Use Value: 70 A IFSM withstands startup inrush; 25°C/W RθJL allows thermal relief via 2 oz copper pour without heatsink. |
| Reverse Battery Protection Circuit | Industrial 24 V Power Supply Input Stage |
Use Scenario: Protection of 12 V vehicle infotainment head units against accidental reverse battery connection during service. IC Role / Device Role / Timing Role: Series-connected Schottky diode placed between battery input and main DC bus. Use Value: 100 μA IR at 25°C ensures <1 mW standby loss; AEC-Q101 qualification guarantees field reliability over 15-year vehicle lifetime. | Use Scenario: Input rectification and hold-up support in DIN-rail mounted 24 V industrial PLC power modules. IC Role / Device Role / Timing Role: Freewheeling diode in boost PFC front-end and clamp diode in flyback auxiliary supplies. Use Value: 150 V VRRM safely blocks 24 V system transients; DO-214AC footprint enables automated placement on high-volume production lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS315H (ON Semiconductor) | Same 150 V VRRM, 3 A IF, but VF = 0.87 V typ at 3 A; slightly lower IR (50 μA @ 25°C) | Higher efficiency at light loads; same AEC-Q101 qualification; identical DO-214AC package | Preferred where <0.1 V VF reduction improves thermal margin in sealed enclosures |
| SB3150 (Vishay) | 150 V VRRM, 3 A IF, VF = 0.92 V typ at 3 A; IR = 100 μA @ 25°C; not AEC-Q101 qualified | Lacks automotive qualification; suitable for industrial/commercial DC/DC but not automotive OEM designs | Select when automotive qualification is not required and cost sensitivity outweighs qualification needs |
Compared with SS315H and SB3150, SK315AHR3G offers balanced trade-offs: AEC-Q101 compliance for automotive use, verified 0.95 V VF performance, and consistent 100 μA IR at 25°C - making it optimal for Tier 1-supplied power modules where qualification and parameter consistency are mandatory.
Availability
SK315AHR3G is available at Aetrix Electronics and suitable for automotive LED lighting, 12 V DC/DC buck converters, and reverse battery protection circuits requiring stable component supply, long-lifecycle assurance, and AEC-Q101-compliant sourcing.
Supply support for SK315AHR3G 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 Taiwanese semiconductor manufacturer specializing in discrete power devices, including Schottky diodes, MOSFETs, and TVS components.
The SK3xAH family was designed specifically for high-reliability automotive and industrial power conversion, emphasizing AEC-Q101 qualification, low VF stability over temperature, and robust surge handling in surface-mount packages.
FAQ
What is the maximum junction temperature rating for SK315AHR3G?
The SK315AHR3G has a maximum junction temperature (TJ MAX) of +150°C, validated across its full operating range from -55°C to +150°C. This rating enables reliable deployment in under-hood automotive environments and enclosed industrial power supplies where ambient temperatures exceed 85°C. The device's 25°C/W junction-to-lead thermal resistance supports effective heat transfer to the PCB, helping maintain safe TJ under sustained 3 A forward conduction.
Is SK315AHR3G suitable for reverse battery protection in 12 V automotive systems?
Yes, SK315AHR3G is explicitly suited for reverse battery protection in 12 V automotive systems due to its 150 V VRRM rating - providing 10× margin over nominal 12 V and covering ISO 7637-2 load-dump transients up to 120 V. Its 100 μA reverse leakage at 25°C minimizes standby current draw, and AEC-Q101 qualification confirms reliability across automotive temperature and vibration profiles. The DO-214AC package supports automated assembly in high-volume ECUs.
What does the "R3G" suffix indicate in SK315AHR3G?
The "R3G" suffix in SK315AHR3G denotes tape-and-reel packaging: "R3" specifies 7,500 units per reel, and "G" indicates halogen-free, RoHS-compliant construction per TSC's material specifications. This matches the ordering code format defined in the SK3xAH datasheet (Version B2304), where "x" represents voltage rating (15 → 150 V) and "H" denotes the AEC-Q101-qualified variant.
How does SK315AHR3G perform at elevated temperatures?
At 125°C junction temperature, SK315AHR3G exhibits ≤0.5 mA reverse leakage current under 150 V reverse bias - a critical specification for under-hood applications. Its forward voltage increases only moderately (typical VF shift <0.1 V from 25°C to 125°C), preserving efficiency in thermally stressed DC/DC stages. The device's 10,000 V/μs dV/dt rating remains stable across temperature, ensuring immunity to fast transients in noisy automotive environments.
Does SK315AHR3G have a guard ring structure, and why does it matter?
Yes, SK315AHR3G incorporates a guard ring structure, as confirmed in the "Features" section of the official datasheet. This design enhances edge termination robustness, improving resistance to surface flashover and voltage-induced degradation during repetitive transients. In automotive applications like LED drivers or ECU power inputs, the guard ring extends operational life by mitigating premature breakdown under load-dump or jump-start conditions - a key differentiator versus non-guarded Schottky diodes.
SK315AHR3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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
SK315AHR3G FAQ
1.How can I place an order for SK315AHR3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK315AHR3G 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 SK315AHR3G reliable?
The price and inventory of SK315AHR3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK315AHR3G is usually 5 days.
3.What payment methods are accepted for SK315AHR3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK315AHR3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK315AHR3G?
SK315AHR3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK315AHR3G 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 SK315AHR3G?
For technical support, including SK315AHR3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK315AHR3G requirements.
6.How does Aetrix verify that SK315AHR3G is sourced from the original manufacturer or authorized distributors?
All SK315AHR3G 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 SK315AHR3G meets industry standards.
7.What is the process for return or replacement of SK315AHR3G?
All SK315AHR3G units undergo pre-shipment inspection (PSI). If there is an issue with SK315AHR3G, 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 SK315AHR3G part is unused and in its original packaging.
Return procedure for SK315AHR3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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