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Taiwan Semiconductor Corporation SK34BHR5G
- Part No.:
- SK34BHR5G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SK34BHR5G.pdf
- Description:
- DIODE SCHOTTKY 40V 3A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,937
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Product details
Overview
SK34BHR5G from Taiwan Semiconductor is a 40 V, 3 A surface-mount Schottky barrier rectifier in DO-214AA (SMB) package, featuring low forward voltage (0.75 V max at 3 A, 25°C), high surge capability (70 A IFSM), and AEC-Q101 qualification for automotive-grade reliability. It serves as a freewheeling or reverse-battery protection diode in compact DC/DC converters and car lighting systems.
For engineers reviewing the SK34BHR5G datasheet, SK34BHR5G pinout, SK34BHR5G application, or SK34BHR5G equivalent, key selection criteria include its 40 V VRRM rating, 0.75 V VF max at rated current, 10,000 V/μs dV/dt rating, junction temperature range up to +150°C, and moisture sensitivity level 1 compliance - all critical for high-efficiency, space-constrained automotive and industrial power designs.
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 VF and fast switching enable high-efficiency operation in low-voltage, high-frequency power conversion stages.
The device operates across –55°C to +150°C junction temperature, with thermal resistance RθJL = 23°C/W and RθJA = 63°C/W. Reverse leakage is limited to 100 µA at 25°C and 5 mA at 100°C under rated 40 V reverse bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in reverse-biased applications like reverse battery protection. |
| IF | 3 A - Continuous forward current rating; supports stable conduction in 12 V–24 V DC/DC output stages. |
| VF (max) | 0.75 V @ 3 A, 25°C - Low conduction loss enables >92% efficiency in 5–12 V buck converters. |
| IFSM | 70 A - Peak non-repetitive surge current handling; withstands inrush and transient overloads without failure. |
| dV/dt | 10,000 V/μs - High critical rate of rise tolerance prevents false turn-on during fast-switching transients. |
| TJ max | +150°C - Extended junction temperature rating allows use in under-hood automotive environments without derating. |
| MSL | Level 1 (per J-STD-020) - No floor life limitation; suitable for standard SMT reflow without dry-pack requirements. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount plastic case with cathode band polarity indicator. Dimensions: 4.60 × 3.95 × 2.00 mm (L × W × H). Weight: ~0.100 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., ground or switch node) in freewheeling path; requires low-inductance layout. |
| Cathode | Forward current exit / reverse-blocking terminal | Marked by band; ties to higher-potential rail (e.g., input or output); must sustain full VRRM during off-state. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements - enables use in infotainment, lighting, and body control modules. |
| Guard ring structure | Enhances ruggedness against voltage transients and edge breakdown - improves reliability in noisy 12 V vehicle electrical systems. |
| Low VF and high IFSM | Reduces conduction loss while maintaining surge robustness - balances efficiency and fault tolerance in compact power supplies. |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS directives - supports environmentally regulated industrial and automotive supply chains. |
Applications
| Automotive LED Lighting | 12 V DC/DC Buck Converter Output Stage |
|---|---|
Use Scenario: Driving high-brightness LED arrays in headlamps and DRLs with PWM dimming and reverse-polarity protection. IC Role / Device Role / Timing Role: Freewheeling diode and reverse-battery protection element in synchronous and asynchronous buck regulators. Use Value: 0.75 V VF minimizes heat generation in sealed lamp housings; 150°C TJ rating ensures stable operation under hood ambient temperatures. | Use Scenario: Providing continuous current path during high-side MOSFET off-time in automotive auxiliary power supplies. IC Role / Device Role / Timing Role: Output rectifier in 12 V input, 3.3–5 V output step-down converters powering microcontrollers and sensors. Use Value: 70 A IFSM handles cold-crank surges; MSL Level 1 simplifies manufacturing flow without baking or humidity control. |
| Reverse Battery Protection Circuit | Industrial 24 V Power Input Stage |
Use Scenario: Preventing damage from accidental battery reversal during service or jump-starting in vehicle ECUs. IC Role / Device Role / Timing Role: Series-connected blocking diode placed between battery terminal and system input rail. Use Value: 40 V VRRM exceeds 24 V system max (including load dump); low VF avoids excessive voltage drop in always-on circuits. | Use Scenario: Input rectification and polarity safeguard in DIN-rail mounted PLC power modules. IC Role / Device Role / Timing Role: Primary input protection diode in 24 V nominal industrial power inputs subject to field wiring errors. Use Value: AEC-Q101 qualification provides extended lifetime assurance; DO-214AA footprint offers proven manufacturability in high-volume SMT lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS34H (ON Semiconductor) | Same 40 V VRRM, 3 A IF, DO-214AA package; VF = 0.55 V typ (25°C), slightly lower than SK34BHR5G's 0.75 V max. | Lower VF improves efficiency marginally but lacks AEC-Q101 qualification. | Preferred where absolute lowest conduction loss is prioritized over automotive qualification. |
| SB340 (Good-Ark) | 40 V VRRM, 3 A IF, DO-214AA; VF = 0.55 V typ, IR = 500 µA max at 25°C - higher leakage than SK34BHR5G's 100 µA max. | Higher IR may increase standby power in always-on systems; not AEC-Q101 rated. | Suitable for cost-sensitive industrial applications where leakage and qualification are secondary. |
Compared with SS34H and SB340, SK34BHR5G trades marginal VF increase for guaranteed AEC-Q101 compliance and tighter IR specification - making it the preferred choice for automotive front-end protection and lighting where reliability and specification consistency are mandatory.
Availability
SK34BHR5G is available at Aetrix Electronics and suitable for automotive LED lighting, 12 V DC/DC converter output stages, and reverse battery protection circuits requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SK34BHR5G 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 semiconductor manufacturer specializing in discrete power devices, including rectifiers, TVS diodes, and MOSFETs, with global distribution and automotive qualification capabilities.
The SK3xBH series was developed specifically for high-reliability, surface-mount Schottky rectification in automotive and industrial power systems - emphasizing low VF, surge robustness, and AEC-Q101 compliance.
FAQ
What is the maximum junction temperature rating for SK34BHR5G?
The SK34BHR5G has a maximum junction temperature (TJ) of +150°C, validated per AEC-Q101 stress testing. This allows reliable operation in under-hood automotive environments and thermally constrained industrial enclosures. The device maintains specified electrical performance up to this limit, with derating applied beyond 25°C ambient per the forward current derating curve in the datasheet. Thermal design must account for RθJL = 23°C/W to ensure safe operation under full load.
Is SK34BHR5G pin-compatible with other SMB-packaged Schottky rectifiers?
Yes, SK34BHR5G uses the standard DO-214AA (SMB) package with anode and cathode terminals in the industry-standard configuration. Its physical footprint and solder pad layout match all JEDEC-compliant SMB rectifiers, including SS34H and SB340. However, electrical characteristics - especially VF, IR, and qualification status - differ, so functional compatibility must be verified per circuit requirements before substitution.
Does SK34BHR5G meet automotive qualification standards?
Yes, SK34BHR5G is explicitly AEC-Q101 qualified, as confirmed in the official Taiwan Semiconductor datasheet (Version B2212). This qualification covers stress tests including HTGB, HTRB, TST, and mechanical shock, validating suitability for automotive electronic modules. It is not merely "automotive grade" - it carries formal certification required for Tier 1 supplier BOMs in lighting, body control, and infotainment systems.
What is the reverse leakage current specification for SK34BHR5G at 100°C?
At TJ = 100°C and rated VR = 40 V, the SK34BHR5G exhibits a maximum reverse leakage current (IR) of 5 mA, as specified in the Electrical Specifications table. This value is measured under pulse conditions (PW = 30 ms) and reflects real-world behavior in elevated-temperature automotive environments. It is significantly lower than generic 40 V Schottkys that specify 10–20 mA at same conditions.
What packaging and reel quantity is offered for SK34BHR5G?
SK34BHR5G is supplied in tape-and-reel format per the ordering code SK34BHR5G, with 3,000 units per reel. The "R5G" suffix denotes green (halogen-free) compound and RoHS-compliant packaging. Reels conform to EIA-481 standards and are compatible with standard SMT pick-and-place equipment. Moisture sensitivity level is rated MSL 1, eliminating bake requirements prior to assembly.
SK34BHR5G 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):
- 40 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 500 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 40 V
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
- Operating Temperature - Junction:
- -55°C ~ 125°C
SK34BHR5G FAQ
1.How can I place an order for SK34BHR5G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK34BHR5G 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 SK34BHR5G reliable?
The price and inventory of SK34BHR5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK34BHR5G is usually 5 days.
3.What payment methods are accepted for SK34BHR5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK34BHR5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK34BHR5G?
SK34BHR5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK34BHR5G 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 SK34BHR5G?
For technical support, including SK34BHR5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK34BHR5G requirements.
6.How does Aetrix verify that SK34BHR5G is sourced from the original manufacturer or authorized distributors?
All SK34BHR5G 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 SK34BHR5G meets industry standards.
7.What is the process for return or replacement of SK34BHR5G?
All SK34BHR5G units undergo pre-shipment inspection (PSI). If there is an issue with SK34BHR5G, 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 SK34BHR5G part is unused and in its original packaging.
Return procedure for SK34BHR5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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