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Taiwan Semiconductor Corporation SK320BH
- Part No.:
- SK320BH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SK320BH.pdf
- Description:
- DIODE SCHOTTKY 200V 3A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:14,050
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Product details
Overview
SK320BH from Taiwan Semiconductor is a 200 V, 3 A Schottky barrier rectifier in DO-214AA (SMB) package, featuring low forward voltage (0.95 V max at 3 A, 25°C), high surge current capability (70 A), and AEC-Q101 qualification for automotive-grade reliability-used in reverse battery protection and DC/DC converters.
For engineers reviewing the SK320BH datasheet, SK320BH pinout, SK320BH application, or SK320BH equivalent, key selection criteria include peak reverse voltage (200 V), thermal resistance (RθJA = 63 °C/W), junction temperature range (–55 to +150 °C), and RoHS/halogen-free compliance for automotive and industrial power systems.
Technical Context
The SK320BH is a single-die, unidirectional Schottky rectifier optimized for high-frequency, low-loss operation. Its 200 V VRRM rating supports 140 V RMS reverse blocking, while its 70 A IFSM (8.3 ms half-sine) enables robust transient handling in automotive power rails.
Thermally, it delivers RθJL = 23 °C/W (junction-to-lead) and operates up to +150 °C junction temperature. Reverse leakage is specified at ≤2 mA at 125 °C and rated VR, confirming stable performance under elevated thermal stress in engine bay or LED driver environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - Supports 140 V RMS input in DC/DC front-end stages without breakdown |
| IF | 3 A continuous - Sustains steady-state load current in compact automotive lighting modules |
| VF (max) | 0.95 V @ 3 A, 25°C - Minimizes conduction loss (<2.85 W) and thermal rise in SMB footprint |
| IFSM | 70 A @ 8.3 ms - Withstands cold-crank surges and load-dump transients in 12 V/24 V systems |
| TJ max | +150 °C - Enables placement near heat sources (e.g., motor drivers, LED heatsinks) without derating |
| RθJA | 63 °C/W - Predictable ambient-referenced thermal design on standard FR-4 with minimal copper |
| IR (max) | 2 mA @ 125°C, 200 V - Low leakage preserves efficiency in high-temp reverse-battery protection |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, cathode-indicated by band, matte tin-plated leads, moisture sensitivity level 1 (J-STD-020).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to lower-potential side (e.g., ground or return path) in freewheeling or reverse polarity protection |
| Cathode | Current exit point during forward conduction; marked by band | Connected to higher-potential rail (e.g., battery+, input VIN); blocks reverse current when biased negatively |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, lighting, and infotainment power supplies |
| Guard ring structure | Enhances ruggedness against overvoltage transients and improves edge termination reliability |
| Low VF (0.95 V max) | Reduces power dissipation by ~30% vs. comparable 200 V Si diodes, lowering heatsink requirements |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU directives for environmentally constrained automotive supply chains |
| High dV/dt rating (10,000 V/μs) | Resists false triggering in fast-switching SMPS and prevents commutation failure in inductive loads |
Applications
| Reverse Battery Protection | Automotive LED Lighting |
|---|---|
Use Scenario: Prevents damage to vehicle electronics during incorrect battery connection or jump-start events. IC Role / Device Role / Timing Role: Unidirectional blocking device placed in series with main power rail; conducts only during correct polarity. Use Value: Eliminates need for fuses or MOSFET-based protection circuits-reducing BOM count and PCB area while maintaining 200 V standoff. | Use Scenario: Powers high-brightness LED arrays in headlamps, DRLs, and interior lighting with PWM dimming. IC Role / Device Role / Timing Role: Freewheeling diode across inductive buck converter output stage to clamp flyback energy. Use Value: Low VF minimizes conduction loss during 100+ kHz switching, improving system efficiency and reducing thermal stress on LED drivers. |
| DC/DC Converter Output Rectification | Industrial 24 V Power Supply Input Stage |
Use Scenario: Secondary-side rectification in isolated 5–12 V DC/DC modules for ADAS sensors and telematics units. IC Role / Device Role / Timing Role: High-frequency synchronous rectifier replacement-operating at >200 kHz with minimal recovery loss. Use Value: Schottky architecture eliminates reverse recovery charge (Qrr ≈ 0), enabling higher frequency operation and smaller filter components. | Use Scenario: Input rectification and hold-up in DIN-rail mounted 24 V industrial PSUs powering PLCs and HMIs. IC Role / Device Role / Timing Role: Main AC/DC bridge output diode or DC input protection element in redundant power architectures. Use Value: 70 A surge rating ensures survival during inrush into large bulk capacitors; 150 °C TJ rating supports operation in enclosed 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-3EWH02-M3/5A | Same DO-214AA package, 200 V VRRM, but 3.0 A IF and 0.93 V VF (typ); not AEC-Q101 qualified | Lacks automotive qualification; suitable for industrial/commercial DC/DC but not safety-critical vehicle systems | Select when AEC-Q101 is not required and tighter VF tolerance is prioritized |
| ON Semiconductor SB320-E3/54 | DO-214AA, 200 V, 3 A, 0.95 V VF (max), but only rated to +125 °C TJ and no guard ring | Lower thermal margin limits use in under-hood environments; reduced transient ruggedness vs. SK320BH | Acceptable for cabin-mounted modules where ambient <85 °C and surge stress is low |
Compared with VS-3EWH02-M3/5A and SB320-E3/54, the SK320BH uniquely combines AEC-Q101 qualification, +150 °C operation, and integrated guard ring-making it the preferred choice for automotive power rails requiring long-term reliability under thermal and electrical stress.
Availability
SK320BH is available at Aetrix Electronics and suitable for reverse battery protection, automotive LED lighting, and DC/DC converter output rectification requiring stable component supply across automotive OEM and Tier-1 production programs.
Supply support for SK320BH 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 SK32BH–SK320BH family was designed specifically for high-reliability, high-efficiency power conversion in automotive electronics-emphasizing ruggedness, thermal stability, and AEC-Q101 compliance from the silicon process through final test.
FAQ
What is the maximum junction temperature rating for the SK320BH?
The SK320BH has a maximum junction temperature (TJ) of +150 °C, verified per absolute maximum ratings in the official datasheet. This allows reliable operation in under-hood automotive environments where ambient temperatures exceed 105 °C. The SK320BH maintains specified electrical performance-including reverse leakage and forward voltage-up to this limit, provided thermal design respects RθJA = 63 °C/W and board-level copper area meets recommended pad layout.
Is the SK320BH pin-compatible with other parts in the SK3xBH series?
Yes-the SK320BH shares identical DO-214AA (SMB) package dimensions, lead finish, polarity marking, and terminal configuration with all SK3xBH variants (e.g., SK34BH, SK310BH). All parts use the same anode/cathode pinout and mounting footprint, enabling drop-in voltage-scaling substitutions within the same PCB layout-provided thermal and electrical margins for the new VRRM and IF are validated.
Does the SK320BH meet automotive qualification standards?
Yes, the SK320BH is explicitly AEC-Q101 qualified per the manufacturer's documentation. This qualification covers stress tests including HTGB, HTRB, TCT, and mechanical shock-validating suitability for automotive power applications such as body control modules, lighting, and infotainment. The SK320BH also complies with J-STD-020 moisture sensitivity level 1 and JESD201 class 2 whisker resistance.
What is the typical forward voltage of the SK320BH at 3 A and 125 °C?
The SK320BH datasheet specifies VF ≤ 0.95 V at 3 A and 25 °C; at 125 °C, VF decreases due to negative temperature coefficient of Schottky diodes. While no exact typ value is given at 125 °C, curve data (Fig.10) shows VF ≈ 0.82–0.85 V at 3 A and 125 °C for SK315BH–SK320BH variants-enabling more efficient operation at elevated temperatures than silicon PN diodes.
How is polarity indicated on the SK320BH package?
Polarity on the SK320BH is indicated by a distinct cathode band printed on the molded plastic body of the DO-214AA (SMB) package. Per mechanical drawings and marking diagram, this band aligns with the cathode terminal-confirming that the unmarked end is the anode. This marking is visible under standard optical inspection and compatible with automated optical inspection (AOI) systems used in SMT assembly lines.
SK320BH 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):
- 200 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 @ 200 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
SK320BH FAQ
1.How can I place an order for SK320BH through Aetrix?
Please submit a Request for Quotation (RFQ) for SK320BH 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 SK320BH reliable?
The price and inventory of SK320BH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK320BH is usually 5 days.
3.What payment methods are accepted for SK320BH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK320BH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK320BH?
SK320BH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK320BH 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 SK320BH?
For technical support, including SK320BH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK320BH requirements.
6.How does Aetrix verify that SK320BH is sourced from the original manufacturer or authorized distributors?
All SK320BH 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 SK320BH meets industry standards.
7.What is the process for return or replacement of SK320BH?
All SK320BH units undergo pre-shipment inspection (PSI). If there is an issue with SK320BH, 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 SK320BH part is unused and in its original packaging.
Return procedure for SK320BH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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