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Taiwan Semiconductor Corporation SK12H45 A0G
- Part No.:
- SK12H45 A0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SK12H45 A0G.pdf
- Description:
- DIODE SCHOTTKY 45V 12A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:6,103
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Product details
Overview
SK12H45 A0G from Taiwan Semiconductor is a 12A, 45V Schottky barrier rectifier in DO-201AD package, featuring low forward voltage (VF ≤ 0.55 V at 12 A, 25°C), high surge current capability (IFSM = 320 A), and AEC-Q101 qualification for automotive-grade reliability. It serves as primary output rectification in high-efficiency DC/DC converters and SMPS.
For engineers reviewing the SK12H45 A0G datasheet, SK12H45 A0G pinout, SK12H45 A0G application, or SK12H45 A0G equivalent, key selection criteria include forward voltage drop, thermal resistance (RθJA = 30°C/W), junction temperature rating (–55°C to +175°C), reverse leakage (≤150 µA at 25°C), and DO-201AD mechanical compatibility.
Technical Context
This discrete Schottky diode uses a single-die construction with guard ring structure to enhance overvoltage robustness and reduce avalanche-induced failure risk. Its low VF and high IFSM support high-frequency switching topologies where conduction loss minimization and transient surge resilience are critical.
The device operates across –55°C to +175°C junction temperature range and exhibits RθJC = 10°C/W, enabling effective heat transfer to heatsink-mounted PCB layouts. Reverse leakage remains ≤20 mA at 100°C, supporting stable performance in thermally demanding environments like under-hood automotive power supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF (Continuous Forward Current) | 12 A - supports sustained output rectification in 100–300 W DC/DC converters without forced cooling |
| VRRM (Repetitive Peak Reverse Voltage) | 45 V - rated for 36 V nominal input systems with 25% safety margin against transients |
| VF (Forward Voltage) | ≤0.55 V @ 12 A, 25°C - reduces conduction loss to <6.6 W per device, improving system efficiency |
| IFSM (Surge Current) | 320 A @ 8.3 ms - withstands cold-start inrush and line-dip recovery surges in industrial adapters |
| RθJA | 30 °C/W - enables ~120°C junction rise at 12 A on standard FR-4 with minimal copper area |
| TJ max | +175 °C - qualified for under-hood automotive ambient up to +125°C with derating |
| IR (Reverse Leakage) | ≤150 µA @ 45 V, 25°C - ensures low standby power loss in always-on power rails |
Pinout & Package
Package: DO-201AD - axial-leaded, molded plastic case meeting UL 94V-0; cathode indicated by band; pure tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Input current entry point | Connected to switch node or transformer secondary; must handle full peak current and thermal stress |
| Cathode (Lead 2, banded end) | Output current exit point | Connected to output filter capacitor; polarity marking prevents reverse-bias installation error |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive power modules requiring zero-defect reliability and extended temperature cycling |
| Guard ring structure | Prevents edge breakdown during voltage transients, increasing ruggedness in unregulated input stages |
| Low VF (0.55 V typ.) | Reduces power dissipation by >30% vs. comparable 45 V Si diodes, lowering heatsink requirements |
| Halogen-free packaging | Complies with IEC 61249-2-21, supporting RoHS and ELV Directive compliance in final assemblies |
| JESD201 Class 2 whisker resistance | Ensures long-term solder joint integrity in high-vibration environments such as engine control units |
Applications
| Automotive DC/DC Converter | Industrial SMPS Output Stage |
|---|---|
Use Scenario: 12 V to 5 V/3.3 V step-down converter in body control module with 42 V load dump immunity. IC Role / Device Role / Timing Role: Primary output rectifier handling continuous 10 A load and 320 A surge events. Use Value: Low VF and 175°C TJ rating enable compact layout without active cooling while maintaining AEC-Q101 compliance. | Use Scenario: Secondary-side rectification in 200 W telecom adapter operating at 100 kHz switching frequency. IC Role / Device Role / Timing Role: High-efficiency freewheeling path during synchronous rectifier dead time. Use Value: 320 A IFSM absorbs turn-off spikes from MOSFETs; DO-201AD allows manual rework and automated placement. |
| Laptop Adapter Secondary Rectifier | LED Driver Power Supply |
Use Scenario: 19 V output stage in 65 W universal-input AC/DC adapter with foldback protection. IC Role / Device Role / Timing Role: Unidirectional current path delivering regulated DC to USB-PD controller and battery charger IC. Use Value: 0.55 V VF minimizes thermal rise in confined adapter housing; RoHS/halogen-free meets global regulatory requirements. | Use Scenario: Constant-current LED string driver in outdoor signage with wide ambient temperature variation (–40°C to +85°C). IC Role / Device Role / Timing Role: Output rectifier in flyback-derived constant-current topology. Use Value: Stable IR ≤150 µA at 25°C and ≤20 mA at 100°C ensures consistent current regulation across temperature extremes. |
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-12EWH04-M3 | 45 V VRRM, 12 A IF, VF = 0.54 V @ 12 A, but DO-214AB (SMB) package - smaller footprint, higher RθJA (40°C/W) | Preferred for space-constrained PCBs; requires thermal pad or enhanced copper for same power dissipation | Select when board area is limited and thermal management can be augmented via layout |
| ON Semiconductor MBR1245CT | 45 V VRRM, dual common-cathode configuration, VF = 0.62 V @ 12 A, TO-220AC package - higher VF, lower RθJC (2.5°C/W), but larger size | Suitable for high-reliability industrial supplies where heatsinking is available and dual-output symmetry is needed | Choose for dual-channel designs or when lower junction-to-case resistance outweighs package size penalty |
Compared with VS-12EWH04-M3 and MBR1245CT, the SK12H45 A0G offers optimal balance of low VF, proven AEC-Q101 qualification, DO-201AD serviceability, and 30°C/W RθJA-making it ideal for cost-sensitive, thermally moderate automotive and industrial adapters where leaded reliability matters.
Availability
SK12H45 A0G is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial SMPS, and LED driver power supplies requiring stable component supply and long-lifecycle support.
Supply support for SK12H45 A0G 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 for industrial and automotive markets.
The SK12H45 A0G belongs to TSC's AEC-Q101-qualified Schottky rectifier family, engineered specifically for high-efficiency, high-reliability secondary-side rectification in automotive and industrial power conversion systems.
FAQ
What is the maximum junction temperature rating for SK12H45 A0G?
The SK12H45 A0G has a maximum junction temperature (TJ max) of +175°C, validated across its full operating range from –55°C to +175°C. This rating supports deployment in under-hood automotive environments and high-ambient industrial enclosures. Derating curves in the official datasheet define safe current limits above 125°C ambient, ensuring reliable operation of SK12H45 A0G in thermally aggressive applications.
Is SK12H45 A0G AEC-Q101 qualified?
Yes, SK12H45 A0G is AEC-Q101 qualified - confirmed by Taiwan Semiconductor's F2105 revision documentation and ordering code suffix "H" (present in base part SK12H45H, with A0G denoting ammo box packaging). The qualification covers temperature cycling, humidity bias, and mechanical shock tests required for automotive power electronics. SK12H45 A0G maintains this qualification in its DO-201AD package configuration.
What is the forward voltage drop of SK12H45 A0G at rated current?
The SK12H45 A0G exhibits a maximum forward voltage (VF) of 0.55 V at 12 A and 25°C junction temperature, measured under pulsed conditions (PW = 0.3 ms). At elevated temperatures (e.g., 100°C), VF decreases slightly due to Schottky physics, remaining below 0.52 V - a key factor enabling high-efficiency operation in SK12H45 A0G-based power supplies.
Does SK12H45 A0G have a guard ring structure?
Yes, SK12H45 A0G incorporates a guard ring structure explicitly stated in its features list to improve overvoltage protection and edge breakdown immunity. This design enhances ruggedness during transient voltage events such as load dump or inductive kickback, making SK12H45 A0G especially suitable for automotive and industrial systems lacking clamping circuitry.
What packaging options are available for SK12H45 A0G?
SK12H45 A0G is supplied in 500-piece ammo boxes, as indicated by the "A0G" suffix in the ordering code. The underlying device uses DO-201AD packaging with pure tin-plated leads compliant with J-STD-002. Tape-and-reel variants (e.g., SK12H45H) are also available, but SK12H45 A0G specifically denotes the ammo box format for manual assembly or low-volume prototyping use cases.
SK12H45 A0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Tape & Box (TB)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io):
- 12A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 12 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 120 µA @ 45 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- 200°C (Max)
SK12H45 A0G FAQ
1.How can I place an order for SK12H45 A0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK12H45 A0G 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 SK12H45 A0G reliable?
The price and inventory of SK12H45 A0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK12H45 A0G is usually 5 days.
3.What payment methods are accepted for SK12H45 A0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK12H45 A0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK12H45 A0G?
SK12H45 A0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK12H45 A0G 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 SK12H45 A0G?
For technical support, including SK12H45 A0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK12H45 A0G requirements.
6.How does Aetrix verify that SK12H45 A0G is sourced from the original manufacturer or authorized distributors?
All SK12H45 A0G 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 SK12H45 A0G meets industry standards.
7.What is the process for return or replacement of SK12H45 A0G?
All SK12H45 A0G units undergo pre-shipment inspection (PSI). If there is an issue with SK12H45 A0G, 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 SK12H45 A0G part is unused and in its original packaging.
Return procedure for SK12H45 A0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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