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Taiwan Semiconductor Corporation SK35AHM2G
- Part No.:
- SK35AHM2G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SK35AHM2G.pdf
- Description:
- DIODE SCHOTTKY 50V 3A DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,525
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Product details
Overview
SK35AHM2G from Taiwan Semiconductor is a 3 A, 50 V Schottky barrier rectifier in DO-214AC (SMA) package, featuring low forward voltage (0.72 V at 3 A, 25°C), low reverse leakage (200 µA at 50 V, 25°C), and AEC-Q101 qualification for automotive-grade reliability. It serves as a freewheeling or reverse-battery protection diode in DC/DC converters and car lighting systems.
For engineers reviewing the SK35AHM2G datasheet, SK35AHM2G pinout, SK35AHM2G application, or SK35AHM2G equivalent, key selection criteria include its 50 V VRRM, 70 A IFSM, 150°C TJMAX, junction-to-lead thermal resistance of 25°C/W, and moisture sensitivity level 1 compliance - all critical for high-efficiency, thermally constrained automotive power designs.
Technical Context
The SK35AHM2G implements a single-die Schottky structure with guard ring over-voltage protection and matte tin-plated leads solderable per J-STD-002. Its 0.72 V forward voltage at 3 A enables reduced conduction loss versus silicon PN diodes, while its 10,000 V/µs dV/dt rating supports fast-switching topologies.
Thermally, it delivers RθJL = 25°C/W and RθJA = 66°C/W, enabling sustained 3 A operation without forced cooling in standard PCB layouts. The device operates across –55°C to +150°C junction temperature range and meets JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse voltage; defines safe blocking capability in 12–24 V automotive bus applications |
| IF | 3 A - Continuous forward current; supports compact DC/DC converter output stages without heatsinking |
| VF | 0.72 V @ 3 A, 25°C - Low conduction loss reduces power dissipation by >40% vs. comparable silicon rectifiers |
| IR | 200 µA @ 50 V, 25°C - Low leakage preserves battery life in always-on reverse-battery protection circuits |
| IFSM | 70 A - Peak surge current handling enables robustness against load dump transients in vehicle systems |
| TJMAX | 150°C - High junction temperature rating allows operation in under-hood environments without derating |
| RθJL | 25°C/W - Efficient heat transfer to PCB copper; enables thermal design with minimal copper area |
Pinout & Package
Package: DO-214AC (SMA), surface-mount plastic case with cathode band polarity indicator, 0.070 g weight, UL 94V-0 molding compound, and J-STD-020 Level 1 moisture sensitivity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry | Connected to lower-potential node (e.g., switch node in buck converter); requires adequate copper pour for thermal relief |
| Cathode | Forward current exit / reverse voltage reference | Marked by band; ties to higher-potential rail (e.g., output capacitor positive); critical for reverse-battery protection orientation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use including temperature cycling, mechanical shock, and humidity testing per stress test plan |
| Guard ring structure | Enhances edge termination robustness, improving VRRM consistency and reducing risk of premature avalanche failure |
| Low VF & high IFSM | Enables high-efficiency, high-reliability operation in space-constrained 12 V/24 V power rails with transient immunity |
| Halogen-free & RoHS compliant | Meets automotive environmental compliance requirements (e.g., ELV Directive) without compromising thermal or electrical performance |
Applications
| Automotive DC/DC Converters | Reverse Battery Protection |
|---|---|
Use Scenario: Step-down conversion from 12 V or 24 V vehicle battery to 3.3 V or 5 V for infotainment and ADAS modules. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous or asynchronous buck topology. Use Value: 0.72 V VF minimizes conduction loss, increasing efficiency by ~2–3% over 0.85 V alternatives at full load. | Use Scenario: Preventing damage when battery terminals are accidentally reversed during service or jump-starting. IC Role / Device Role / Timing Role: Series-blocking diode placed between battery input and system ground return path. Use Value: 50 V VRRM provides sufficient margin above 24 V nominal systems, while 200 µA leakage avoids parasitic drain on parked vehicles. |
| Car Interior Lighting | Low-Voltage Inverters |
Use Scenario: LED driver power supply in dome lights, map lights, and ambient lighting with PWM dimming. IC Role / Device Role / Timing Role: Output rectifier in flyback or buck-boost LED driver IC secondary side. Use Value: Fast recovery and low VF reduce switching losses and thermal rise, extending LED lifetime in sealed fixtures. | Use Scenario: Generating isolated AC outputs from 12 V DC for small instrumentation or sensor excitation. IC Role / Device Role / Timing Role: Output rectifier in push-pull or half-bridge inverter secondary winding. Use Value: 70 A IFSM withstands startup surges; 150°C TJMAX ensures stability during intermittent high-load operation. |
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-3EYH05-M3/5AT | Same DO-214AC package, 3 A/50 V rating, but VF = 0.71 V (typ) and IR = 300 µA @ 50 V, 25°C | Slightly higher leakage may impact ultra-low-power always-on circuits | Preferred where Vishay supply chain alignment or alternate qualification history is required |
| ON Semiconductor SB350 | DO-214AA (SMB) package, 3 A/50 V, VF = 0.75 V (max), IR = 500 µA @ 50 V, 25°C | Larger footprint and higher VF reduce efficiency in dense layouts | Consider only if SMB footprint compatibility is mandatory and thermal margin exists |
Compared with VS-3EYH05-M3/5AT and SB350, the SK35AHM2G offers the lowest leakage (200 µA) among 50 V/3 A Schottkys and matches AEC-Q101 qualification - making it optimal for automotive reverse-battery and DC/DC applications demanding low standby loss and high reliability.
Availability
SK35AHM2G is available at Aetrix Electronics and suitable for automotive DC/DC converters, reverse battery protection circuits, and car interior lighting systems requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for SK35AHM2G 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 SK35AHM2G belongs to TSC's AEC-Q101-qualified SKx AH Schottky rectifier family, engineered specifically for high-reliability 12 V/24 V automotive power systems where low VF, low IR, and thermal robustness are critical.
FAQ
What is the maximum junction temperature rating for SK35AHM2G?
The SK35AHM2G has a maximum junction temperature (TJMAX) of +150°C, verified per AEC-Q101 stress testing. This rating allows uninterrupted operation in under-hood automotive environments and high-ambient industrial settings without thermal shutdown. The SK35AHM2G maintains specified electrical parameters up to this limit when mounted on a standard FR-4 PCB with recommended pad layout.
Is SK35AHM2G pin-compatible with other SKx AH series devices?
Yes - all SKx AH devices, including SK35AHM2G, share identical DO-214AC (SMA) package dimensions, anode/cathode terminal locations, and polarity marking (cathode band). This enables direct substitution within the same voltage grade (e.g., SK34AH, SK35AH, SK36AH) without PCB redesign, provided thermal and electrical margins remain acceptable.
Does SK35AHM2G meet automotive qualification standards?
Yes, SK35AHM2G is AEC-Q101 qualified, covering stress tests including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing. This certification confirms suitability for automotive power electronics such as body control modules, lighting drivers, and infotainment power supplies - not just industrial or commercial use.
What is the forward voltage specification for SK35AHM2G at elevated temperature?
At 3 A and 100°C junction temperature, the SK35AHM2G exhibits a typical forward voltage of approximately 0.62 V - lower than at 25°C due to the negative temperature coefficient of Schottky diodes. This behavior improves thermal stability in high-load conditions and is documented in Figure 8 of the official SK32AH–SK320AH datasheet (Version B2304).
How does the guard ring feature benefit SK35AHM2G in real-world applications?
The guard ring in SK35AHM2G enhances edge termination uniformity, preventing localized electric field crowding during voltage transients. In practice, this increases the device's immunity to overvoltage events like load dump (ISO 7637-2 Pulse 5a), reducing failure risk in automotive 12 V systems where unclamped spikes can exceed 60 V. It also improves parameter consistency across production lots.
SK35AHM2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 720 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 200 µA @ 50 V
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SK35AHM2G FAQ
1.How can I place an order for SK35AHM2G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK35AHM2G 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 SK35AHM2G reliable?
The price and inventory of SK35AHM2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK35AHM2G is usually 5 days.
3.What payment methods are accepted for SK35AHM2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK35AHM2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK35AHM2G?
SK35AHM2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK35AHM2G 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 SK35AHM2G?
For technical support, including SK35AHM2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK35AHM2G requirements.
6.How does Aetrix verify that SK35AHM2G is sourced from the original manufacturer or authorized distributors?
All SK35AHM2G 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 SK35AHM2G meets industry standards.
7.What is the process for return or replacement of SK35AHM2G?
All SK35AHM2G units undergo pre-shipment inspection (PSI). If there is an issue with SK35AHM2G, 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 SK35AHM2G part is unused and in its original packaging.
Return procedure for SK35AHM2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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