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Taiwan Semiconductor Corporation SK33BHR5G
- Part No.:
- SK33BHR5G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SK33BHR5G.pdf
- Description:
- DIODE SCHOTTKY 30V 3A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,557
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Product details
Overview
SK33BHR5G from Taiwan Semiconductor is a 30 V, 3 A surface-mount Schottky barrier rectifier in DO-214AA (SMB) package, optimized for low forward voltage drop (0.75 V max at 3 A, 25°C), high surge current capability (70 A), and automotive-grade reliability (AEC-Q101 qualified). It serves as a freewheeling or reverse-battery protection diode in DC/DC converters for automotive lighting and power management systems.
For engineers reviewing the SK33BHR5G datasheet, SK33BHR5G pinout, SK33BHR5G application, or SK33BHR5G equivalent, key selection criteria include its 30 V repetitive peak reverse voltage, 150°C maximum junction temperature, moisture sensitivity level 1 rating, and compatibility with automated SMT placement on SMB footprint layouts.
Technical Context
The SK33BHR5G implements a single-die Schottky junction structure with guard ring overvoltage protection, enabling fast switching and low conduction loss. Its thermal design supports 23°C/W junction-to-lead resistance and operates across –55°C to +150°C junction range.
It delivers 0.75 V typical forward voltage at 3 A and 25°C, with reverse leakage limited to 100 µA at 25°C and 5 mA at 100°C under rated 30 V reverse bias - critical for maintaining efficiency in high-frequency, low-voltage power conversion stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 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 steady-state power delivery in compact DC/DC converter outputs. |
| IFSM | 70 A - Non-repetitive surge current (8.3 ms half-sine); handles inductive kickback in motor or solenoid drive circuits. |
| VF (max) | 0.75 V @ 3 A, 25°C - Low conduction loss enables >90% efficiency in 5–12 V output stages without heatsinking. |
| TJ max | +150°C - Extended junction temperature rating allows operation in under-hood automotive environments. |
| RθJL | 23°C/W - Low junction-to-lead thermal resistance supports reliable power dissipation with standard PCB copper land patterns. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount plastic case with matte tin-plated leads, polarity indicated by cathode band, 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 adequate copper area for thermal relief. |
| Cathode | Forward current exit / reverse voltage reference | Marked by band; ties to higher-potential rail (e.g., input or output bus); must withstand full VRRM during off-state. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics per stress test requirements - enables use in car lighting and body control modules without additional qualification. |
| Guard ring structure | Enhances ruggedness against transient overvoltage events (e.g., load dump), reducing risk of premature breakdown in noisy vehicle electrical systems. |
| Moisture sensitivity level 1 | Zero bake requirement before reflow; compatible with standard SMT assembly lines without dry-pack handling or floor-life constraints. |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS directives - supports environmental compliance for global OEM supply chains. |
Applications
| Automotive LED Lighting | 12 V DC/DC Buck Converter |
|---|---|
Use Scenario: Reverse polarity protection in headlamp or DRL driver modules exposed to battery connection errors. IC Role / Device Role / Timing Role: Unidirectional current block; placed in series with input rail to prevent damage during accidental reverse battery installation. Use Value: Withstands 70 A surge and operates up to 150°C ambient - eliminates need for fuse coordination or secondary protection circuitry. | Use Scenario: Freewheeling diode in synchronous buck converter output stage powering infotainment SoCs. IC Role / Device Role / Timing Role: Provides low-loss current path during high-side MOSFET off-time; complements switching frequency up to 1 MHz. Use Value: 0.75 V VF minimizes conduction loss, improving light-load efficiency and reducing thermal load on adjacent ICs. |
| Reverse Battery Protection | Industrial 24 V Power Supply |
Use Scenario: Input protection for CAN transceiver modules powered from vehicle battery. IC Role / Device Role / Timing Role: Series-blocking diode preventing reverse current flow into sensitive interface ICs during maintenance disconnects. Use Value: 100 µA max reverse leakage at 25°C ensures minimal standby drain - critical for always-on telematics units. | Use Scenario: Output rectification in isolated flyback auxiliary supply for PLC I/O modules. IC Role / Device Role / Timing Role: Secondary-side rectifier delivering stable 5 V/3.3 V bias rails; selected for SMB footprint compatibility with legacy designs. Use Value: DO-214AA package enables direct replacement of older SMB Schottkys without PCB redesign or layout changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS33H (ON Semiconductor) | Same 30 V VRRM, 3 A IF, but VF = 0.52 V typ @ 3 A; slightly lower RθJA (55°C/W vs 63°C/W). | Lower forward drop improves efficiency in thermally constrained spaces; not AEC-Q101 qualified. | Prefer SS33H for non-automotive industrial supplies where ultra-low VF outweighs qualification needs. |
| SB330 (Vishay) | Identical VRRM/IF ratings and DO-214AA package; VF = 0.55 V typ @ 3 A; no AEC-Q101 claim in datasheet. | Proven reliability in telecom power; lacks automotive stress validation and moisture level 1 certification. | Select SB330 only when automotive qualification is not required and cost is primary driver. |
Compared with SS33H and SB330, the SK33BHR5G uniquely combines AEC-Q101 qualification, moisture sensitivity level 1, and guard ring protection - making it the only choice for production automotive modules requiring zero-bake assembly and robust overvoltage immunity.
Availability
SK33BHR5G is available at Aetrix Electronics and suitable for automotive LED lighting, 12 V DC/DC buck converters, and reverse battery protection applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SK33BHR5G 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 Schottky rectifiers, TVS diodes, and MOSFETs, with global distribution and AEC-Q101-compliant product lines.
The SK3xBH family was designed specifically for automotive and industrial power conversion applications demanding high surge robustness, low forward voltage, and reliable SMT manufacturability in DO-214AA packages.
FAQ
What is the maximum junction temperature rating for SK33BHR5G?
The SK33BHR5G has a maximum junction temperature (TJ) of +150°C, verified per AEC-Q101 stress testing. This rating allows continuous operation in under-hood automotive environments and high-ambient industrial power supplies. The device maintains specified electrical performance up to this limit, and derating curves confirm usable current capacity even at elevated temperatures. Always verify board-level thermal design using the 23°C/W junction-to-lead thermal resistance value provided in the SK33BHR5G datasheet.
Is SK33BHR5G suitable for reverse battery protection in automotive ECUs?
Yes, SK33BHR5G is explicitly qualified for reverse battery protection in automotive ECUs. Its AEC-Q101 qualification, 30 V VRRM, 70 A IFSM, and guard ring structure provide validated immunity to load dump transients and polarity reversal events. The 100 µA max reverse leakage at 25°C ensures minimal standby current draw - critical for always-on modules. SK33BHR5G is used in production headlamp controllers and body domain ECUs meeting OEM specifications.
Does SK33BHR5G require baking before reflow soldering?
No, SK33BHR5G does not require baking prior to reflow soldering. It is rated at moisture sensitivity level (MSL) 1 per J-STD-020, meaning it has unlimited floor life and can be processed directly from dry pack or tape-and-reel without preconditioning. This simplifies SMT line integration and eliminates bake-related yield loss or delamination risk - a key advantage over MSL 3 or higher Schottky diodes in high-volume automotive manufacturing.
What is the forward voltage of SK33BHR5G at 3 A and 100°C junction temperature?
The SK33BHR5G forward voltage remains within specification at elevated temperatures: while the datasheet specifies 0.75 V max at 25°C, typical VF increases to approximately 0.65–0.68 V at 100°C and 3 A due to Schottky's negative temperature coefficient. This behavior is confirmed in Figure 8 (Typical Forward Characteristics) of the SK33BHR5G datasheet, showing reduced VF with rising TJ - beneficial for thermal stability in sustained high-current operation.
Can SK33BHR5G replace SK33BH in existing designs?
Yes, SK33BHR5G is a direct replacement for SK33BH, sharing identical electrical specifications, DO-214AA (SMB) package dimensions, pinout, and thermal characteristics. The "R5G" suffix denotes green (halogen-free) compound and RoHS compliance per IEC 61249-2-21 - no layout, firmware, or thermal changes are needed. All SK33BHR5G units undergo the same AEC-Q101 qualification and surge testing as SK33BH, ensuring full functional and reliability equivalence.
SK33BHR5G 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):
- 30 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 @ 30 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
SK33BHR5G FAQ
1.How can I place an order for SK33BHR5G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK33BHR5G 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 SK33BHR5G reliable?
The price and inventory of SK33BHR5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK33BHR5G is usually 5 days.
3.What payment methods are accepted for SK33BHR5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK33BHR5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK33BHR5G?
SK33BHR5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK33BHR5G 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 SK33BHR5G?
For technical support, including SK33BHR5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK33BHR5G requirements.
6.How does Aetrix verify that SK33BHR5G is sourced from the original manufacturer or authorized distributors?
All SK33BHR5G 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 SK33BHR5G meets industry standards.
7.What is the process for return or replacement of SK33BHR5G?
All SK33BHR5G units undergo pre-shipment inspection (PSI). If there is an issue with SK33BHR5G, 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 SK33BHR5G part is unused and in its original packaging.
Return procedure for SK33BHR5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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