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Taiwan Semiconductor Corporation SK35BHR5G
- Part No.:
- SK35BHR5G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SK35BHR5G.pdf
- Description:
- DIODE SCHOTTKY 50V 3A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,527
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Product details
Overview
SK35BHR5G from Taiwan Semiconductor is a 3A, 50V Schottky barrier surface-mount rectifier in DO-214AA (SMB) package, AEC-Q101 qualified for automotive use, with 0.75V max forward voltage at 3A/25°C and 100µA max reverse leakage at rated VR and 25°C. It serves as a freewheeling or reverse-battery protection diode in DC/DC converters and car lighting systems.
For engineers reviewing the SK35BHR5G datasheet, SK35BHR5G pinout, SK35BHR5G application, or SK35BHR5G equivalent, key selection factors include its 50V VRRM, 70A IFSM, 125°C/150°C junction temperature range, AEC-Q101 qualification, and DO-214AA mechanical compatibility with automated SMT assembly.
Technical Context
This Schottky rectifier uses a single-die construction with guard ring overvoltage protection and matte tin-plated leads compliant with J-STD-002 solderability. Its low forward voltage enables high-efficiency operation in low-voltage, high-frequency switching circuits.
Thermal performance is defined by RθJL = 23°C/W and RθJA = 63°C/W, supporting continuous 3A conduction under standard PCB layout conditions. The device operates across –55°C to +150°C storage and –55°C to +125°C or +150°C junction temperature ranges depending on derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in reverse-biased applications like reverse battery protection. |
| IF | 3 A - Continuous average forward current; supports stable power conversion in compact DC/DC modules without forced cooling. |
| VF (max) | 0.75 V @ 3A, 25°C - Low conduction loss improves system efficiency and reduces thermal load in high-duty-cycle freewheeling paths. |
| IR (max) | 100 µA @ 50V, 25°C - Low leakage preserves battery life in always-on automotive subsystems such as LED lighting controllers. |
| IFSM | 70 A - Peak non-repetitive surge current capability; withstands inrush and fault transients in automotive power rails. |
| TJ Range | –55°C to +125°C (or +150°C with derating) - Enables deployment in engine bay and cabin environments per AEC-Q101 stress requirements. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount plastic case with cathode band polarity indicator, 0.100g mass, UL 94V-0 molding compound, and JESD 201 Class 2 whisker-resistant matte tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., ground or switch node) in freewheeling configuration; requires thermal pad connection for full 3A rating. |
| Cathode | Forward current exit / reverse-blocking terminal | Marked by band; ties to higher-potential rail (e.g., input supply); reverse voltage applied here must not exceed 50V. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing-enables use in safety-critical lighting and body control modules. |
| Guard ring structure | Enhances ruggedness against transient overvoltage events (e.g., load dump), improving long-term stability in 12V/24V vehicle electrical systems. |
| Moisture sensitivity level 1 | Eliminates bake requirement prior to reflow; compatible with standard SMT assembly lines without special handling or dry pack. |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS directives-supports environmental compliance for global OEM automotive programs. |
Applications
| Automotive LED Lighting | 12V DC/DC Buck Converter Output Stage |
|---|---|
Use Scenario: High-brightness LED headlamp driver with reverse-polarity protection and freewheeling path during PWM dimming. IC Role / Device Role / Timing Role: Reverse battery protection diode and synchronous rectifier freewheeling element. Use Value: 0.75V VF minimizes power loss and heat generation in space-constrained lamp housings; AEC-Q101 ensures field reliability over 15-year vehicle lifetime. | Use Scenario: Secondary-side rectification in isolated buck-derived power supply for infotainment microcontrollers. IC Role / Device Role / Timing Role: Freewheeling diode conducting during low-side switch off-time. Use Value: 70A IFSM handles startup surges; DO-214AA footprint allows dense layout while maintaining thermal margin at 3A continuous load. |
| Reverse Battery Protection Circuit | Automotive Body Control Module (BCM) Power Input |
Use Scenario: Input protection for 12V-powered telematics units exposed to workshop battery reversal. IC Role / Device Role / Timing Role: Series-connected blocking diode preventing damage during incorrect jump-start connections. Use Value: 50V VRRM exceeds automotive load-dump peaks; 100µA IR prevents standby current drain in always-on modules. | Use Scenario: Power rail conditioning for BCM subcircuits requiring clean, polarity-secured 12V input. IC Role / Device Role / Timing Role: Input rectifier and transient clamp in conjunction with TVS devices. Use Value: Guard ring design suppresses edge breakdown during ISO 7637-2 pulse 5a transients; SMB package fits tight board areas near connector inputs. |
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-3K50 | Same DO-214AA package, 3A/50V rating, but VF = 0.72V typ (vs. 0.75V max for SK35BHR5G); no AEC-Q101 documentation publicly available. | Acceptable for industrial DC/DC use; not validated for automotive underhood deployment. | Select when AEC-Q101 is not required and slightly lower typical VF is prioritized. |
| ON Semiconductor SB350 | DO-214AA, 3A/50V, VF = 0.55V typ at 3A, but IR = 500µA @ 25°C - 5× higher leakage than SK35BHR5G's 100µA max. | Better efficiency at light loads; less suitable for ultra-low-quiescent-current automotive modules. | Select when forward loss dominates thermal budget and leakage is secondary to efficiency. |
Compared with VS-3K50 and SB350, SK35BHR5G uniquely combines AEC-Q101 qualification, 100µA max reverse leakage, and robust surge capability-making it the preferred choice for automotive power management where reliability and low standby loss are jointly critical.
Availability
SK35BHR5G is available at Aetrix Electronics and suitable for automotive LED lighting, 12V DC/DC converter output stages, and reverse battery protection circuits requiring stable component supply, AEC-Q101 compliance, and DO-214AA footprint consistency.
Supply support for SK35BHR5G 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 automotive, industrial, and consumer markets since 1979.
The SK3xBH series was developed specifically for AEC-Q101-compliant automotive power rectification-targeting high-reliability, low-loss applications in lighting, body electronics, and power distribution modules.
FAQ
What is the maximum junction temperature rating for SK35BHR5G?
The SK35BHR5G has a maximum junction temperature of +125°C under standard operating conditions, with extended operation up to +150°C possible under derated current conditions. This dual-rating supports flexibility in thermal design for automotive under-hood and cabin applications where ambient temperatures vary significantly. The SK35BHR5G datasheet specifies both limits explicitly in its Absolute Maximum Ratings table.
Is SK35BHR5G suitable for reverse battery protection in 24V commercial vehicles?
SK35BHR5G is rated for 50V VRRM, making it appropriate for 12V automotive systems but not recommended for direct use in 24V commercial vehicle reverse protection without additional clamping or series configuration. For 24V applications, higher-voltage variants like SK36BHR5G (60V) or SK39BHR5G (90V) from the same family provide safer margin against load dump transients. SK35BHR5G remains optimal for 12V passenger car lighting and BCM inputs.
Does SK35BHR5G have a halogen-free and RoHS-compliant construction?
Yes, SK35BHR5G is halogen-free per IEC 61249-2-21 and fully RoHS compliant, as confirmed in the official Taiwan Semiconductor product specification document (Version B2212). The molding compound, lead finish, and internal materials meet these environmental standards, enabling use in global automotive supply chains with strict material declarations and substance restrictions.
What is the marking code printed on the SK35BHR5G device body?
The SK35BHR5G is marked with "SK35B" on the device body, consistent with Taiwan Semiconductor's ordering code convention where "x" denotes the voltage rating (here, "35" = 50V). The "R5G" suffix in the full orderable part number indicates tape-and-reel packaging (3,000 pcs/reel) and green compound, but only "SK35B" appears physically on the DO-214AA package surface.
How does the guard ring feature improve reliability in SK35BHR5G?
The guard ring in SK35BHR5G mitigates edge breakdown under high dv/dt or transient overvoltage conditions-such as ISO 7637-2 pulse 5a load dump events-by controlling electric field distribution at the die periphery. This structural enhancement increases ruggedness without increasing forward voltage, directly supporting AEC-Q101 stress test compliance and long-term reliability in automotive power rails where SK35BHR5G is deployed.
SK35BHR5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 750 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 50 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
SK35BHR5G FAQ
1.How can I place an order for SK35BHR5G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK35BHR5G 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 SK35BHR5G reliable?
The price and inventory of SK35BHR5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK35BHR5G is usually 5 days.
3.What payment methods are accepted for SK35BHR5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK35BHR5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK35BHR5G?
SK35BHR5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK35BHR5G 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 SK35BHR5G?
For technical support, including SK35BHR5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK35BHR5G requirements.
6.How does Aetrix verify that SK35BHR5G is sourced from the original manufacturer or authorized distributors?
All SK35BHR5G 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 SK35BHR5G meets industry standards.
7.What is the process for return or replacement of SK35BHR5G?
All SK35BHR5G units undergo pre-shipment inspection (PSI). If there is an issue with SK35BHR5G, 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 SK35BHR5G part is unused and in its original packaging.
Return procedure for SK35BHR5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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