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Taiwan Semiconductor Corporation SK19BHM4G
- Part No.:
- SK19BHM4G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SK19BHM4G.pdf
- Description:
- DIODE SCHOTTKY 90V 1A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,085
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Product details
Overview
SK19BHM4G from Taiwan Semiconductor is a 1 A, 90 V Schottky barrier surface-mount rectifier in DO-214AA (SMB) package, featuring 0.85 V forward voltage at 1 A and 100 µA reverse leakage at 25°C, used in high-efficiency DC/DC converters and AC/DC adapters.
For engineers reviewing the SK19BHM4G datasheet, SK19BHM4G pinout, SK19BHM4G application, or SK19BHM4G equivalent, key selection criteria include its 90 V repetitive peak reverse voltage, 30 A surge current rating, 125°C maximum junction temperature, and SMB package compatibility with automated SMT assembly.
Technical Context
This Schottky rectifier uses a single-die construction with guard ring for overvoltage protection and exhibits low forward voltage drop to minimize conduction losses in high-frequency switching topologies. Its 10,000 V/µs critical dV/dt rating supports reliable operation in fast-switching SMPS circuits.
Thermal performance is defined by a 25°C/W junction-to-lead thermal resistance, enabling stable 1 A continuous operation up to 125°C ambient when mounted on standard PCB copper areas. Moisture sensitivity level is rated J-STD-020 Level 1, eliminating bake requirements prior to reflow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 90 V - Maximum repetitive reverse blocking voltage; defines safe operating range in flyback or buck converter output stages |
| IF | 1 A - Continuous forward current rating; determines minimum trace width and thermal pad area needed on PCB |
| VF @ 1 A, 25°C | 0.85 V - Low conduction loss enables >92% efficiency in 12 V–48 V output rails at light-to-moderate loads |
| IR @ 90 V, 25°C | 100 µA - Minimal leakage preserves standby power budget in energy-efficient adapters |
| IFSM (8.3 ms) | 30 A - Withstands inrush surges during cold-start of industrial power modules without degradation |
| TJ max | 125°C - Specifies maximum allowable junction temperature; requires thermal design margin below this limit |
| RθJL | 25°C/W - Enables direct thermal modeling from junction to PCB lead; informs heatsink or copper pour sizing |
Pinout & Package
Package: DO-214AA (SMB), surface-mount plastic case with matte tin-plated leads, polarity indicated by cathode band, weight ≈ 0.093 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck, secondary winding in flyback) |
| Cathode | Forward current exit / reverse-blocking terminal | Connected to output rail; cathode band marks this terminal for correct orientation during placement |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Improves ruggedness against transient overvoltage events without requiring external snubbers |
| J-STD-020 Level 1 moisture sensitivity | Eliminates pre-reflow baking step, reducing manufacturing cycle time and cost |
| RoHS and halogen-free compliance | Meets IEC 61249-2-21 and EU RoHS directives for environmentally regulated end equipment |
| High surge current capability (30 A) | Supports robust startup behavior in offline SMPS designs with large input capacitors |
Applications
| AC/DC Adapters | DC/DC Converters |
|---|---|
Use Scenario: Secondary-side rectification in 5–24 V wall adapters for consumer electronics. IC Role / Device Role / Timing Role: Schottky rectifier replacing conventional PN diodes to reduce conduction loss and improve efficiency. Use Value: 0.85 V VF lowers heat generation vs. 1.1 V Si diodes, enabling smaller heatsinks and higher power density. | Use Scenario: Output rectification in isolated 48 V–12 V buck-derived telecom power modules. IC Role / Device Role / Timing Role: High-speed unidirectional current path with minimal reverse recovery charge. Use Value: Near-zero reverse recovery eliminates switching spikes, easing EMI filter design and improving stability. |
| LED Drivers | Industrial Power Supplies |
Use Scenario: Constant-current rectification in offline LED drivers for commercial lighting. IC Role / Device Role / Timing Role: Primary output rectifier handling pulsed current waveforms with high peak-to-average ratio. Use Value: 30 A IFSM withstands LED string inrush without derating, extending driver lifetime. | Use Scenario: Auxiliary supply rectification in programmable logic controller (PLC) power stages. IC Role / Device Role / Timing Role: Input-stage rectifier for 24 V control rail derived from 120/230 V AC mains. Use Value: 90 V VRRM provides 2× safety margin over 48 V nominal system voltage, meeting IEC 61000-4-5 surge immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS19-E3/5AT (Vishay) | Same 90 V VRRM, 1 A IF, but VF = 0.875 V (max) at 1 A; slightly higher thermal resistance (RθJL = 30°C/W) | Identical SMB package; suitable for drop-in replacement where 0.025 V VF increase is acceptable | Select SS19-E3/5AT if dual-sourcing is required and minor efficiency trade-off is tolerable |
| SB190 (ON Semiconductor) | 90 V VRRM, 1 A IF, VF = 0.82 V (typ) at 1 A; TJ max = 125°C same; RθJL = 27°C/W | SMB package compatible; lower VF improves light-load efficiency but tighter VF distribution may affect parallel operation | Choose SB190 when optimizing for lowest possible conduction loss in thermally constrained layouts |
Compared with SK19BHM4G, SS19-E3/5AT offers identical voltage/current ratings but slightly higher VF and thermal resistance, while SB190 delivers marginally lower VF and comparable thermal performance-both require no PCB changes but differ in efficiency and thermal headroom trade-offs.
Availability
SK19BHM4G is available at Aetrix Electronics and suitable for AC/DC adapters, DC/DC converters, and industrial power supplies requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SK19BHM4G 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 management and industrial markets since 1979.
The SK1xB series targets high-efficiency, cost-sensitive power conversion applications, emphasizing ruggedness, manufacturability, and compliance with international environmental standards.
FAQ
What is the maximum junction temperature rating for SK19BHM4G?
The SK19BHM4G has a maximum junction temperature (TJ max) of 125°C. This rating applies under continuous forward conduction at rated current and must be maintained within thermal design margins using appropriate PCB copper area or heatsinking. Operation above 125°C risks irreversible parametric shift or failure. The SK19BHM4G datasheet specifies derating curves confirming 1 A capability only up to 125°C junction temperature.
Does SK19BHM4G have a RoHS-compliant and halogen-free construction?
Yes, SK19BHM4G is RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound meets UL 94V-0 flammability rating, and terminals are matte tin plated per J-STD-002 solderability standards. These attributes are confirmed in the official Taiwan Semiconductor M2212 datasheet revision for the SK1xB family, including SK19BHM4G.
What is the forward voltage of SK19BHM4G at 1 A and 25°C?
The forward voltage (VF) of SK19BHM4G is 0.85 V at 1 A and 25°C, measured under pulse test conditions (PW = 0.3 ms). This value is specified in the Electrical Specifications table of the Taiwan Semiconductor SK1xB datasheet (Version M2212) and reflects typical conduction loss in high-frequency switching applications.
Is SK19BHM4G suitable for use in high-surge environments like motor drives?
SK19BHM4G supports 30 A non-repetitive forward surge current (IFSM) for 8.3 ms half-sine waves, making it suitable for moderate-surge applications such as adapter inrush or small relay coils. However, it is not rated for sustained high-dI/dt or repetitive surge events typical in motor drive freewheeling paths; dedicated TVS or higher IFSM rectifiers are recommended for those cases.
What package type does SK19BHM4G use, and is it compatible with standard SMB footprints?
SK19BHM4G uses the DO-214AA (SMB) package, with mechanical dimensions matching JEDEC DO-214AA Issue D. Its outline-including 4.60 mm length, 2.60 mm width, and 2.00 mm height-is fully compatible with industry-standard SMB land patterns, enabling direct placement on existing SMT lines without footprint modification.
SK19BHM4G 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):
- 90 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 850 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 90 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
SK19BHM4G FAQ
1.How can I place an order for SK19BHM4G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK19BHM4G 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 SK19BHM4G reliable?
The price and inventory of SK19BHM4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK19BHM4G is usually 5 days.
3.What payment methods are accepted for SK19BHM4G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK19BHM4G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK19BHM4G?
SK19BHM4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK19BHM4G 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 SK19BHM4G?
For technical support, including SK19BHM4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK19BHM4G requirements.
6.How does Aetrix verify that SK19BHM4G is sourced from the original manufacturer or authorized distributors?
All SK19BHM4G 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 SK19BHM4G meets industry standards.
7.What is the process for return or replacement of SK19BHM4G?
All SK19BHM4G units undergo pre-shipment inspection (PSI). If there is an issue with SK19BHM4G, 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 SK19BHM4G part is unused and in its original packaging.
Return procedure for SK19BHM4G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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