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Taiwan Semiconductor Corporation SK33BH
- Part No.:
- SK33BH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SK33BH.pdf
- Description:
- DIODE SCHOTTKY 30V 3A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,733
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Product details
Overview
SK33BH from Taiwan Semiconductor is a 3A, 30V Schottky barrier surface-mount rectifier in DO-214AA (SMB) package, qualified to AEC-Q101, with 0.75V max forward voltage at 3A/25°C, 100µA max reverse current at 30V/25°C, and 70A non-repetitive surge capability-used in automotive lighting and DC/DC converter freewheeling paths.
For engineers reviewing the SK33BH datasheet, SK33BH pinout, SK33BH application, or SK33BH equivalent, key selection criteria include its 30V VRRM, low VF for thermal efficiency, AEC-Q101 qualification for automotive reliability, and SMB package compatibility with automated SMT assembly.
Technical Context
The SK33BH implements a single-die Schottky junction optimized for low forward voltage drop and fast switching, enabling high-efficiency operation in 20–100 kHz DC/DC converters. Its guard ring structure provides overvoltage protection, and moisture sensitivity level 1 ensures robust reflow compatibility without baking.
Thermal performance is defined by RθJL = 23°C/W and RθJA = 63°C/W, supporting continuous 3A conduction at up to +150°C junction temperature. The device operates across –55°C to +150°C storage range and meets JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - Maximum repetitive reverse blocking voltage; sets upper limit for DC bus or flyback clamp voltage in automotive 12V systems. |
| IF | 3 A - Continuous forward current rating; supports typical LED driver or buck converter output stage loads without derating below 90°C ambient. |
| VF (max) | 0.75 V @ 3A, 25°C - Low conduction loss enables >92% efficiency in 5–12V output converters at full load. |
| IR (max) | 100 µA @ 30V, 25°C - Minimal leakage preserves battery standby time in reverse-battery protection circuits. |
| IFSM | 70 A - Peak surge current handling for load dump or cold-crank transients in automotive power rails. |
| TJ (max) | +150°C - Extended junction temperature rating allows operation in under-hood environments without forced cooling. |
| dV/dt | 10,000 V/µs - High critical rate of rise tolerance prevents false turn-on during fast-switching MOSFET gate drive transitions. |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode indicated by molded band; matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck converter or battery negative in reverse protection). |
| Cathode | Forward current exit / reverse-blocking terminal | Marked by band; ties to higher-potential rail (e.g., input supply or LED anode); blocks reverse current above 30V. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing-enables use in front-end lighting and body control modules. |
| Guard ring overvoltage protection | Enhanced edge termination prevents premature avalanche breakdown under transient overvoltage, improving system-level surge immunity. |
| Moisture sensitivity level 1 | No bake required before reflow; compatible with standard PCB assembly lines without special handling or dry pack requirements. |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS directives-supports environmental compliance for global OEM vehicle programs. |
Applications
| Automotive LED Lighting | 12V DC/DC Buck Converters |
|---|---|
Use Scenario: Powering headlamp or DRL LED arrays in 12V vehicle electrical systems with reverse polarity and load dump protection. IC Role / Device Role / Timing Role: Freewheeling diode and reverse-battery protection element in high-side switch or buck regulator output stage. Use Value: 0.75V VF minimizes heat generation in confined headlamp housings; AEC-Q101 ensures 15-year field life under thermal cycling. | Use Scenario: Output rectification in 300kHz synchronous buck converters powering infotainment or ADAS domain controllers. IC Role / Device Role / Timing Role: Asynchronous freewheeling path when high-side MOSFET is off; handles 3A continuous current with minimal conduction loss. Use Value: 70A IFSM withstands startup surges; 10,000 V/µs dV/dt prevents false triggering during fast MOSFET switching edges. |
| Reverse Battery Protection | Industrial 24V Power Supplies |
Use Scenario: Preventing damage to downstream electronics during incorrect battery connection in telematics or fleet management units. IC Role / Device Role / Timing Role: Series-connected Schottky diode on main power input rail; conducts only during correct polarity. Use Value: 100 µA IR at 25°C ensures negligible standby drain; DO-214AA footprint fits compact PCB layouts near connector. | Use Scenario: Input rectification or OR-ing function in redundant 24V industrial PLC power modules. IC Role / Device Role / Timing Role: Low-loss path for 3A auxiliary rail; replaces higher-VF silicon diodes to reduce thermal stress on heatsinks. Use Value: RθJL = 23°C/W enables direct PCB copper pour cooling; +150°C TJ rating supports operation in sealed enclosures. |
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-3EY30-M3/54 | Same 30V VRRM, 3A IF, but VF = 0.52V typ @ 3A; SMB package; no AEC-Q101 claim. | Lower VF improves efficiency in high-duty-cycle supplies, but lacks automotive qualification for safety-critical lighting. | Select for cost-sensitive industrial supplies where AEC-Q101 is not mandated. |
| ON Semiconductor SB330 | 30V VRRM, 3A IF, VF = 0.52V typ @ 3A; DO-214AA; AEC-Q101 qualified; IR = 200 µA @ 30V/25°C. | Higher leakage may impact ultra-low-power battery backup circuits; otherwise pin-compatible and functionally aligned. | Preferred where tighter VF tolerance and same qualification are needed, accepting slightly higher IR. |
Compared with VS-3EY30-M3/54 and SB330, the SK33BH offers balanced VF (0.75V max), certified AEC-Q101 compliance, and 100 µA IR-making it optimal for automotive lighting where reliability, moderate efficiency, and leakage control are jointly critical.
Availability
SK33BH is available at Aetrix Electronics and suitable for automotive LED lighting, 12V DC/DC buck converters, and reverse battery protection requiring stable component supply across production lifecycles.
Supply support for SK33BH 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 automotive, industrial, and consumer markets since 1979.
The SK3xBH series was designed specifically for high-reliability automotive power conversion-emphasizing AEC-Q101 qualification, low VF stability over temperature, and robust surge handling in space-constrained SMB packages.
FAQ
What is the maximum junction temperature rating for the SK33BH?
The SK33BH has a maximum junction temperature (TJ) rating of +150°C, validated per AEC-Q101 stress testing. This allows continuous 3A operation in under-hood automotive environments without active cooling, provided PCB copper area and ambient conditions maintain junction temperature below this limit. Thermal design must account for RθJL = 23°C/W and RθJA = 63°C/W values specified in the SK33BH datasheet.
Is the SK33BH pin-compatible with other devices in the SK3xBH family?
Yes, all SK3xBH variants-including SK32BH, SK33BH, SK34BH through SK320BH-share identical DO-214AA (SMB) package dimensions, anode/cathode pinout, and mechanical footprint. Voltage ratings differ (e.g., SK33BH = 30V, SK34BH = 40V), but layout reuse is fully supported across the family for design flexibility and BOM consolidation.
Does the SK33BH require baking before reflow soldering?
No, the SK33BH has moisture sensitivity level (MSL) 1 per J-STD-020, meaning it can be stored indefinitely at ≤30°C/60% RH and placed directly into reflow without pre-baking. This simplifies manufacturing flow and eliminates risk of popcorn cracking during lead-free reflow profiles-critical for high-yield automotive PCB assembly.
What is the reverse leakage current specification for SK33BH at elevated temperature?
At TJ = 100°C and rated VR = 30V, the SK33BH specifies a maximum reverse current (IR) of 5 mA. This value is confirmed in the Electrical Specifications table and reflects real-world behavior in hot under-hood conditions, ensuring reliable blocking performance even at elevated temperatures encountered in automotive applications.
How does the guard ring feature improve reliability in the SK33BH?
The guard ring in the SK33BH provides enhanced edge termination that suppresses electric field crowding at the die periphery, preventing premature avalanche breakdown during voltage transients. This directly improves robustness against load dump pulses and ISO 7637-2 test waveforms-key for automotive-grade Schottky rectifiers used in lighting and power modules where overvoltage events are common.
SK33BH 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):
- 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
SK33BH FAQ
1.How can I place an order for SK33BH through Aetrix?
Please submit a Request for Quotation (RFQ) for SK33BH 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 SK33BH reliable?
The price and inventory of SK33BH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK33BH is usually 5 days.
3.What payment methods are accepted for SK33BH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK33BH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK33BH?
SK33BH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK33BH 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 SK33BH?
For technical support, including SK33BH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK33BH requirements.
6.How does Aetrix verify that SK33BH is sourced from the original manufacturer or authorized distributors?
All SK33BH 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 SK33BH meets industry standards.
7.What is the process for return or replacement of SK33BH?
All SK33BH units undergo pre-shipment inspection (PSI). If there is an issue with SK33BH, 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 SK33BH part is unused and in its original packaging.
Return procedure for SK33BH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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