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Taiwan Semiconductor Corporation SK12BHR5G
- Part No.:
- SK12BHR5G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SK12BHR5G.pdf
- Description:
- DIODE SCHOTTKY 20V 1A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,568
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Product details
Overview
SK12BHR5G from Taiwan Semiconductor is a 1A, 20V Schottky barrier surface-mount rectifier in DO-214AA (SMB) package, optimized for high-efficiency switching power conversion with low forward voltage and high surge current capability. It serves as an output rectifier in AC/DC adapters and DC/DC converters where fast recovery and low conduction loss are critical.
For engineers reviewing the SK12BHR5G datasheet, SK12BHR5G pinout, SK12BHR5G application, or SK12BHR5G equivalent, key selection criteria include its 0.50 V forward voltage at 1 A and 20 V repetitive peak reverse voltage - parameters directly impacting thermal performance and efficiency in compact, high-frequency SMPS designs.
Technical Context
This discrete Schottky diode uses a single-die construction with guard ring structure to enhance overvoltage robustness and suppress leakage under transient stress. Its junction-to-lead thermal resistance of 25°C/W supports reliable operation up to 125°C junction temperature without forced cooling in board-level power stages.
The device meets J-STD-020 moisture sensitivity level 1 and JESD 201 class 2 whisker test requirements, confirming suitability for lead-free reflow assembly. Cathode polarity is marked by a visible band on the molded SMB body, aligning with standard PCB layout conventions for unidirectional current flow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF (Average Forward Current) | 1 A - supports continuous output rectification in sub-15W adapter and lighting power supplies |
| VRRM (Repetitive Peak Reverse Voltage) | 20 V - defines maximum blocking capability in low-voltage secondary-side applications |
| VF (Forward Voltage @ 1 A, 25°C) | 0.50 V - reduces conduction loss and improves system efficiency vs. silicon diodes |
| IFSM (Surge Peak Forward Current) | 30 A - withstands inrush and transient surges during startup or fault conditions |
| TJ Max (Maximum Junction Temperature) | 125 °C - enables operation in thermally constrained environments without derating below rated current |
| RθJL (Junction-to-Lead Thermal Resistance) | 25 °C/W - allows direct heat transfer to PCB copper, simplifying thermal design |
| IR (Reverse Current @ 25°C, Rated VR) | 500 µA - low leakage preserves standby power budget in energy-efficient designs |
Pinout & Package
Package: DO-214AA (SMB), surface-mount plastic case with matte tin-plated leads, UL 94V-0 rated molding compound, and cathode polarity indicated by a band on the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal | Connected to transformer secondary or switch node; requires adequate copper pour for thermal dissipation |
| Cathode | Current exit terminal | Marked by visible band; ties to output capacitor negative or ground return path |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Improves ruggedness against voltage transients and prevents premature breakdown at edge regions |
| Moisture sensitivity level 1 | Eliminates bake requirement before SMT reflow, reducing manufacturing cost and cycle time |
| Halogen-free per IEC 61249-2-21 | Meets environmental compliance for RoHS-compliant industrial and consumer end equipment |
| High surge current capability (30 A) | Enables use without additional overcurrent protection in cost-sensitive adapter designs |
Applications
| AC/DC Adapters | LED Lighting Drivers |
|---|---|
Use Scenario: Secondary-side rectification in 5–12 V, 10–15 W wall adapters for consumer electronics. IC Role / Device Role / Timing Role: Output rectifier replacing conventional silicon diodes to reduce losses and improve efficiency. Use Value: 0.50 V VF lowers conduction loss by ~40% vs. 0.7 V Si diode, directly improving no-load and light-load efficiency. | Use Scenario: Constant-current output rectification in isolated LED drivers for residential and commercial lighting. IC Role / Device Role / Timing Role: Unidirectional current path after transformer secondary, enabling stable DC output to LED strings. Use Value: Low IR (500 µA at 25°C) minimizes standby current drain, supporting Energy Star Tier 2 compliance. |
| DC/DC Converters | Industrial Power Modules |
Use Scenario: Synchronous rectifier replacement in 12 V input, 3.3–5 V output buck-derived topologies. IC Role / Device Role / Timing Role: Freewheeling diode in non-synchronous flyback or forward converters. Use Value: Fast intrinsic recovery eliminates need for snubbers, reducing BOM count and EMI filtering complexity. | Use Scenario: Auxiliary supply rectification in programmable logic controller (PLC) power rails. IC Role / Device Role / Timing Role: Input-stage rectifier for isolated 24 V auxiliary bias supplies. Use Value: 125°C TJ max rating ensures reliability in sealed enclosures with limited airflow and ambient up to 70°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS12 (ON Semiconductor) | Same 20 V VRRM and 1 A IF, but VF = 0.55 V (max) at 1 A; RθJL = 30°C/W | Slightly higher conduction loss and thermal resistance; suitable where margin exists | Prefer SK12BHR5G when optimizing for lowest VF or tighter thermal budgets |
| SB120 (Vishay) | 20 V VRRM, 1 A IF, VF = 0.52 V (typ), but moisture sensitivity level 2a (requires baking) | Requires pre-reflow bake step; not drop-in for J-STD-020 Level 1 lines | Choose SK12BHR5G for simplified SMT process control and reduced handling risk |
Compared with SS12 and SB120, SK12BHR5G delivers the lowest typical forward voltage (0.50 V), best thermal resistance (25°C/W), and highest manufacturability assurance via MSL Level 1 - making it optimal for high-volume, thermally sensitive, and process-robust power supply designs.
Availability
SK12BHR5G is available at Aetrix Electronics and suitable for AC/DC adapters, LED lighting drivers, and DC/DC converters requiring stable component supply, consistent parametric performance, and full traceability across production batches.
Supply support for SK12BHR5G 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, specializing in power rectifiers, TVS devices, and MOSFETs since 1979.
The SK1xB series was developed specifically for high-efficiency, surface-mount secondary-side rectification in cost-sensitive, space-constrained power supplies - emphasizing low VF, robust surge handling, and seamless compatibility with automated assembly.
FAQ
What is the maximum junction temperature rating for SK12BHR5G?
The SK12BHR5G has a maximum junction temperature (TJ max) of 125°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet. This rating applies under continuous forward conduction at rated current and allows operation without derating in ambient temperatures up to 70°C when mounted on standard FR-4 PCB with 1-inch² copper pour. The SK12BHR5G must not be operated beyond this limit to ensure long-term reliability and parametric stability.
Does SK12BHR5G have a halogen-free construction?
Yes, SK12BHR5G is halogen-free in accordance with IEC 61249-2-21, as confirmed in the "Features" section of the Taiwan Semiconductor datasheet. This compliance ensures reduced toxic gas emission during PCB assembly and end-of-life disposal, supporting environmental requirements for consumer and industrial electronics sold in EU, Japan, and North America.
What is the forward voltage specification for SK12BHR5G at 1 A and 25°C?
The forward voltage (VF) of SK12BHR5G is 0.50 V (typical) at IF = 1 A and TJ = 25°C, per the Electrical Specifications table in the official datasheet. This value is measured under pulse test conditions (PW = 0.3 ms), and actual VF increases with junction temperature - reaching approximately 0.45 V at 100°C and 0.42 V at 125°C based on curve extrapolation from Fig.4.
Is SK12BHR5G suitable for lead-free reflow soldering?
Yes, SK12BHR5G is qualified for lead-free reflow soldering per J-STD-002 and features matte tin-plated leads compatible with peak temperatures up to 260°C. Its moisture sensitivity level is rated at Level 1 per J-STD-020, meaning it can be stored indefinitely in dry pack and placed directly into reflow without baking - eliminating process steps and reducing manufacturing risk.
What package type does SK12BHR5G use, and what are its key mechanical dimensions?
SK12BHR5G uses the DO-214AA (SMB) package, with overall dimensions of 4.60 mm × 2.60 mm × 2.00 mm (L × W × H) and a cathode band marking. The recommended pad layout specifies 3.95 mm × 2.20 mm lands with 0.75 mm spacing between pads, per the Package Outline Dimensions drawing in the Taiwan Semiconductor datasheet revision M2212.
SK12BHR5G 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):
- 20 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 500 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 20 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
SK12BHR5G FAQ
1.How can I place an order for SK12BHR5G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK12BHR5G 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 SK12BHR5G reliable?
The price and inventory of SK12BHR5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK12BHR5G is usually 5 days.
3.What payment methods are accepted for SK12BHR5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK12BHR5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK12BHR5G?
SK12BHR5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK12BHR5G 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 SK12BHR5G?
For technical support, including SK12BHR5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK12BHR5G requirements.
6.How does Aetrix verify that SK12BHR5G is sourced from the original manufacturer or authorized distributors?
All SK12BHR5G 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 SK12BHR5G meets industry standards.
7.What is the process for return or replacement of SK12BHR5G?
All SK12BHR5G units undergo pre-shipment inspection (PSI). If there is an issue with SK12BHR5G, 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 SK12BHR5G part is unused and in its original packaging.
Return procedure for SK12BHR5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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