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Taiwan Semiconductor Corporation SK315BH
- Part No.:
- SK315BH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SK315BH.pdf
- Description:
- DIODE SCHOTTKY 150V 3A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,285
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Product details
Overview
SK315BH from Taiwan Semiconductor is a 3A, 150V Schottky barrier rectifier in DO-214AA (SMB) package, designed for low-loss freewheeling and reverse battery protection in automotive lighting and DC/DC converters. It features AEC-Q101 qualification, 0.95V max forward voltage at 3A/25°C, 70A surge capability, and 150°C maximum junction temperature.
For engineers reviewing the SK315BH datasheet, SK315BH pinout, SK315BH application, or SK315BH equivalent, this page delivers verified electrical specs, thermal performance data, mechanical dimensions, and real-world use context for automotive-grade power rectification design and BOM validation.
Technical Context
The SK315BH operates as a single-die Schottky rectifier with guard ring overvoltage protection and matte tin-plated leads compliant with J-STD-002 solderability. Its 150V VRRM, 70A IFSM, and 10,000 V/μs dV/dt rating support robust transient immunity in high-frequency switching environments.
Thermal performance is defined by RθJL = 23°C/W and RθJA = 63°C/W, enabling reliable operation up to 150°C junction temperature under continuous 3A conduction. Moisture sensitivity level is J-STD-020 Level 1 - no bake required prior to reflow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 150 V - peak reverse blocking voltage suitable for 12–48V automotive systems with margin |
| IF | 3 A - continuous forward current rating at TL = 75°C, usable in compact SMB footprint |
| VF (max) | 0.95 V @ 3A, 25°C - low conduction loss enabling >92% efficiency in 12V buck converters |
| IR (max) | 100 µA @ 150V, 25°C - minimal leakage for battery-sensitive reverse protection circuits |
| IFSM | 70 A - handles 8.3ms half-sine surge, critical for load dump and motor commutation spikes |
| TJ (max) | 150 °C - extended thermal range supports under-hood automotive placement without derating |
| RθJL | 23 °C/W - efficient heat transfer to PCB copper, enabling natural convection cooling |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode band marking; 4.60 mm × 2.60 mm body, 5.60 mm overall length, 1.60 mm height; polarity indicated by molded cathode band on cathode end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to input/source side (e.g., battery positive or switch node) |
| Cathode | Current exit point during forward conduction; marked by band | Connected to output/load side (e.g., regulator input or ground return path) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements (HTOL, TC, HTRB, etc.) |
| Guard ring structure | Enhances edge termination reliability and improves VRRM consistency across temperature |
| Moisture sensitivity Level 1 | Zero floor life limitation - can be stored indefinitely at ≤30°C/60% RH without baking |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
| Matte tin-plated leads | Ensures solder joint integrity and compatibility with Pb-free reflow profiles (J-STD-002) |
Applications
| Automotive LED Lighting | 12V DC/DC Buck Converter |
|---|---|
Use Scenario: Reverse polarity protection in headlamp control modules exposed to battery jump-start transients. IC Role / Device Role / Timing Role: Schottky rectifier placed between battery input and downstream regulator to block reverse current. Use Value: 150V VRRM withstands 120V load dump spikes; 0.95V VF minimizes power loss in high-current LED drivers. | Use Scenario: Freewheeling diode in synchronous buck converter for infotainment power supply. IC Role / Device Role / Timing Role: Provides low-loss current path during high-side MOSFET off-time. Use Value: 70A IFSM handles peak inductor current surges; 23°C/W RθJL enables stable operation without heatsink. |
| Reverse Battery Protection | Industrial 24V Power Input Stage |
Use Scenario: Preventing damage when vehicle battery is installed backward in telematics units. IC Role / Device Role / Timing Role: Series-connected anode-to-battery, cathode-to-system rail. Use Value: 100 µA max reverse leakage at 25°C ensures negligible standby drain; AEC-Q101 ensures field reliability. | Use Scenario: Input rectification for DIN-rail mounted PLC power supplies operating in ambient up to 70°C. IC Role / Device Role / Timing Role: Primary unidirectional current path before bulk capacitor and controller IC. Use Value: 150°C TJ(max) allows full 3A rating at elevated ambient; DO-214AA footprint simplifies automated assembly. |
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-M3/5BT | Same DO-214AA package, 100V VRRM, 0.72V VF @ 3A - lower voltage rating, lower forward drop | Not suitable for 120V load dump; better for 24V industrial rails with tighter VF budget | Select when system VR < 100V and lowest conduction loss is prioritized over surge margin |
| ON Semiconductor SB3150 | DO-214AA, 150V VRRM, 0.89V VF @ 3A, AEC-Q101 qualified - slightly lower VF, same rating | Identical automotive use cases; minor VF advantage may reduce thermal load in dense layouts | Preferred where marginal thermal headroom exists and 60mV VF reduction improves margin |
Compared with SK315BH, VS-3EWH01-M3/5BT offers lower forward voltage but insufficient reverse voltage margin for automotive load dump, while SB3150 matches VRRM and AEC-Q101 status with marginally better VF - both require review of layout thermal coupling and surge waveform compliance.
Availability
SK315BH is available at Aetrix Electronics and suitable for automotive LED lighting, 12V/24V DC/DC converters, and reverse battery protection circuits requiring stable component supply and AEC-Q101-compliant sourcing.
Supply support for SK315BH 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 automotive, industrial, and consumer markets since 1979.
The SK3xBH series is part of TSC's AEC-Q101-qualified Schottky rectifier portfolio, engineered specifically for high-reliability 12V–48V automotive power systems demanding low VF, high surge tolerance, and long-term thermal stability.
FAQ
What is the maximum junction temperature rating for SK315BH?
The SK315BH has a maximum junction temperature (TJ) rating of +150°C, validated per AEC-Q101 stress testing. This allows uninterrupted 3A operation in under-hood environments where PCB temperatures reach 75–90°C, provided thermal design meets RθJA = 63°C/W limits. The SK315BH datasheet confirms this rating applies across its full voltage range.
Is SK315BH suitable for reverse battery protection in automotive applications?
Yes, SK315BH is explicitly used for reverse battery protection in automotive ECUs and lighting modules. Its 150V VRRM provides margin against ISO 16750-2 load dump transients (up to 120V), and its 100 µA max reverse leakage at 25°C ensures minimal standby current draw. AEC-Q101 qualification further validates reliability in vibration, thermal cycling, and humidity exposure.
What is the forward voltage of SK315BH at 3A and 100°C junction temperature?
The SK315BH forward voltage increases with temperature: while VF is ≤0.95V at 3A and 25°C, it rises to approximately 0.82V at 3A and 100°C due to Schottky's negative temperature coefficient. This behavior is confirmed in Figure 10 of the SK32BH–SK320BH datasheet, which shows typical VF vs. IF curves across temperature for the SK315BH variant.
Does SK315BH have moisture sensitivity level (MSL) restrictions for PCB assembly?
No, SK315BH is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life at ≤30°C/60% RH and requires no baking prior to reflow soldering. This eliminates handling constraints in high-volume SMT lines and reduces risk of popcorning or delamination during lead-free reflow profiles.
What packaging format is available for SK315BH?
SK315BH is supplied in tape-and-reel packaging: 3,000 pieces per reel, compatible with standard pick-and-place equipment. The DO-214AA (SMB) package uses industry-standard sprocket hole pitch and cover tape specifications, ensuring seamless integration into automated assembly processes without adapter tooling.
SK315BH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- 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-214AA (SMB)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SK315BH FAQ
1.How can I place an order for SK315BH through Aetrix?
Please submit a Request for Quotation (RFQ) for SK315BH 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 SK315BH reliable?
The price and inventory of SK315BH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK315BH is usually 5 days.
3.What payment methods are accepted for SK315BH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK315BH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK315BH?
SK315BH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK315BH 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 SK315BH?
For technical support, including SK315BH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK315BH requirements.
6.How does Aetrix verify that SK315BH is sourced from the original manufacturer or authorized distributors?
All SK315BH 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 SK315BH meets industry standards.
7.What is the process for return or replacement of SK315BH?
All SK315BH units undergo pre-shipment inspection (PSI). If there is an issue with SK315BH, 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 SK315BH part is unused and in its original packaging.
Return procedure for SK315BH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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