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Taiwan Semiconductor Corporation SK15BHM4G
- Part No.:
- SK15BHM4G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SK15BHM4G.pdf
- Description:
- DIODE SCHOTTKY 50V 1A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,912
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Product details
Overview
SK15BHM4G from Taiwan Semiconductor is a 1A, 50V Schottky barrier surface-mount rectifier in DO-214AA (SMB) package, featuring 0.75V forward voltage at 1A and 5 mA reverse leakage at 100°C, optimized for high-efficiency DC/DC converters and AC/DC adapters.
For engineers reviewing the SK15BHM4G datasheet, SK15BHM4G pinout, SK15BHM4G application, or SK15BHM4G equivalent, key selection criteria include its 50V VRRM, 30A IFSM surge rating, 25°C/W junction-to-lead thermal resistance, and J-STD-020 Level 1 moisture sensitivity-critical for reflow-compatible power supply 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 forward voltage minimizes conduction loss in high-frequency switching topologies.
Operating from −55°C to +150°C junction temperature, it supports stable performance in thermally constrained environments. The DO-214AA (SMB) package provides mechanical robustness and meets UL 94V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse blocking voltage; defines safe operating range in buck, flyback, and boost output stages |
| IF | 1 A - Continuous average forward current; determines steady-state power handling without derating at 25°C ambient |
| VF @ 1A, 25°C | 0.75 V - Low conduction loss enabling >90% efficiency in 12V–24V output SMPS designs |
| IFSM | 30 A - Peak non-repetitive surge current capability; withstands inrush and transient overload events |
| RθJL | 25 °C/W - Junction-to-lead thermal resistance; enables direct PCB copper pour heat sinking without heatsink |
| IR @ 50V, 100°C | 5 mA - Reverse leakage under elevated temperature; impacts standby power and thermal runaway risk |
| Moisture Sensitivity | Level 1 per J-STD-020 - No dry-bake required before SMT reflow; simplifies manufacturing flow |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, single-anode/single-cathode configuration with cathode band polarity indicator.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current entry point | Connected to source-side of switching node; must be routed with low-inductance trace for EMI control |
| Cathode | Output current exit point | Connected to output capacitor and load; polarity band on package confirms correct orientation |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Enhances ruggedness against voltage transients and improves dv/dt immunity up to 10,000 V/µs |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS directives; suitable for eco-sensitive industrial and consumer products |
| J-STD-002 solderable leads | Ensures reliable wetting and joint integrity during lead-free reflow (260°C peak) |
| 125–150°C max junction temperature | Supports operation in sealed enclosures or high-ambient environments without forced cooling |
Applications
| AC/DC Adapters | DC/DC Converters |
|---|---|
Use Scenario: Secondary-side rectification in 5–24V wall adapters powering IoT gateways and USB-C PD accessories. IC Role / Device Role / Timing Role: Schottky rectifier replacing fast recovery diodes to reduce conduction loss and improve light-load efficiency. Use Value: 0.75V VF lowers power dissipation by ~35% vs. 1.1V Si diodes, reducing thermal stress on compact PCB layouts. | Use Scenario: Output rectification in isolated 48V-to-12V telecom DC/DC modules with 300kHz switching frequency. IC Role / Device Role / Timing Role: High-speed unidirectional current path enabling synchronous rectifier control compatibility. Use Value: 30A IFSM handles startup surges without degradation; 25°C/W RθJL allows direct copper thermal pad attachment. |
| LED Drivers | Industrial Power Supplies |
Use Scenario: Constant-current output stage in dimmable LED drivers for commercial lighting fixtures. IC Role / Device Role / Timing Role: Freewheeling path during MOSFET off-time in buck-derived constant-current regulators. Use Value: Low VF maintains tight current regulation across line and load variations; 5 mA IR at 100°C prevents thermal drift. | Use Scenario: Input bridge or output rectification in DIN-rail mounted 24V/48V industrial PSUs with wide ambient range (−40°C to +70°C). IC Role / Device Role / Timing Role: Primary rectification element in high-reliability, long-lifecycle power conversion systems. Use Value: −55°C to +150°C TJ rating ensures operational stability in unventilated control cabinets; J-STD-020 Level 1 eases factory SMT integration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS15H | Same DO-214AA package, 50V VRRM, but 0.82V VF @ 1A and 10 mA IR @ 100°C | Slightly higher conduction loss and leakage; less suitable for thermally tight or ultra-low-standby designs | Acceptable where margin exists in thermal design and efficiency targets are relaxed |
| SB150 | DO-214AA, 50V VRRM, 0.72V VF @ 1A, but only rated to +125°C TJ max and no guard ring | Lacks overvoltage ruggedness and high-temp capability; not recommended for industrial-grade reliability | Lower-cost option for consumer-grade adapters where transient immunity and extended temperature are not critical |
Compared with SS15H and SB150, SK15BHM4G delivers superior thermal robustness (150°C TJ), lower leakage (5 mA vs. 10 mA), and integrated guard ring protection-making it the preferred choice for mission-critical, high-reliability power conversion where long-term stability and surge resilience matter.
Availability
SK15BHM4G is available at Aetrix Electronics and suitable for AC/DC adapters, DC/DC converters, LED drivers, and industrial power supplies requiring stable component supply, consistent parametric performance, and full traceability across production lots.
Supply support for SK15BHM4G 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 power, automotive, and industrial markets since 1979.
The SK1xB series was developed specifically for high-efficiency, surface-mount Schottky rectification in cost-sensitive yet thermally demanding power conversion applications-from consumer adapters to industrial SMPS.
FAQ
What is the maximum junction temperature rating for SK15BHM4G?
The SK15BHM4G has a maximum junction temperature (TJ) rating of +150°C, allowing continuous operation in high-ambient environments such as enclosed power supplies or industrial control cabinets without forced cooling. This rating is confirmed in the Absolute Maximum Ratings table of the official TSC datasheet Version M2212. The SK15BHM4G maintains specified electrical performance up to this limit when thermal design adheres to the 25°C/W RθJL specification.
Does SK15BHM4G have a guard ring structure?
Yes, SK15BHM4G incorporates a guard ring for overvoltage protection, as explicitly stated in the FEATURES section of the TSC datasheet. This structure enhances the device's ability to withstand transient voltage spikes and improves dv/dt immunity to 10,000 V/µs-critical for reliability in noisy switching environments. The guard ring is integral to the die design and is not present in all Schottky rectifiers of similar rating.
What is the forward voltage of SK15BHM4G at 1A and 25°C?
The forward voltage (VF) of SK15BHM4G is 0.75 V at IF = 1 A and TJ = 25°C, per the Electrical Specifications table in the TSC datasheet. This value is measured under pulse conditions (PW = 0.3 ms) and reflects low conduction loss essential for high-efficiency power conversion. At elevated temperatures, VF decreases slightly, while leakage increases-both behaviors are documented in the Characteristics Curves section.
Is SK15BHM4G compatible with lead-free reflow soldering?
Yes, SK15BHM4G features matte tin-plated leads that meet J-STD-002 solderability requirements and are fully compatible with standard lead-free reflow profiles (peak temperature up to 260°C). Its moisture sensitivity level is J-STD-020 Level 1, meaning no dry-bake preconditioning is required prior to assembly-reducing process complexity and cost in high-volume SMT lines.
What packaging format is used for SK15BHM4G?
SK15BHM4G is supplied in DO-214AA (SMB) surface-mount package, with tape-and-reel packaging containing 3,000 units per reel. The package dimensions, pad layout recommendations, and marking diagram-including cathode band polarity and "SK15B" device code-are detailed in the Package Outline Dimensions section of the TSC datasheet. This standardized SMB footprint ensures drop-in compatibility with existing board designs using similar Schottky rectifiers.
SK15BHM4G 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):
- 50 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 750 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 50 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
SK15BHM4G FAQ
1.How can I place an order for SK15BHM4G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK15BHM4G 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 SK15BHM4G reliable?
The price and inventory of SK15BHM4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK15BHM4G is usually 5 days.
3.What payment methods are accepted for SK15BHM4G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK15BHM4G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK15BHM4G?
SK15BHM4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK15BHM4G 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 SK15BHM4G?
For technical support, including SK15BHM4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK15BHM4G requirements.
6.How does Aetrix verify that SK15BHM4G is sourced from the original manufacturer or authorized distributors?
All SK15BHM4G 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 SK15BHM4G meets industry standards.
7.What is the process for return or replacement of SK15BHM4G?
All SK15BHM4G units undergo pre-shipment inspection (PSI). If there is an issue with SK15BHM4G, 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 SK15BHM4G part is unused and in its original packaging.
Return procedure for SK15BHM4G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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