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Taiwan Semiconductor Corporation SK32AHR3G
- Part No.:
- SK32AHR3G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SK32AHR3G.pdf
- Description:
- DIODE SCHOTTKY 20V 3A DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,129
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Product details
Overview
SK32AHR3G from Taiwan Semiconductor is a 3 A, 20 V Schottky barrier rectifier in DO-214AC (SMA) package, optimized for low forward voltage drop (0.55 V at 3 A, 25°C), high surge current capability (70 A), and AEC-Q101 qualification for automotive use. It serves as a freewheeling or reverse-battery protection diode in DC/DC converters and car lighting systems.
For engineers reviewing the SK32AHR3G datasheet, SK32AHR3G pinout, SK32AHR3G application, or SK32AHR3G equivalent, key selection criteria include its 20 V repetitive peak reverse voltage, 150°C maximum junction temperature, moisture sensitivity level 1 rating, and compatibility with automated SMT placement per J-STD-002 solderability standards.
Technical Context
The SK32AHR3G implements a single-die Schottky structure with guard ring over-voltage protection and matte tin-plated leads. Its low VF enables high efficiency in low-voltage, high-frequency switching applications, while its 10,000 V/µs critical dV/dt rating supports robust operation in noisy automotive environments.
Thermally, it features a 25°C/W junction-to-lead resistance and 66°C/W junction-to-ambient resistance, enabling reliable 3 A continuous conduction at elevated ambient temperatures when properly mounted on PCB copper. The device operates across –55°C to +150°C junction range and meets UL 94V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF (Continuous Forward Current) | 3 A - Supports sustained power conversion in compact DC/DC modules without forced cooling |
| VRRM (Repetitive Peak Reverse Voltage) | 20 V - Rated for 12 V automotive battery systems with margin for load dump transients |
| VF (Forward Voltage @ 3 A, 25°C) | 0.55 V max - Minimizes conduction loss and thermal rise in high-duty-cycle freewheeling paths |
| IFSM (Surge Forward Current) | 70 A (8.3 ms half-sine) - Withstands inrush and fault currents in automotive lighting and starter circuits |
| TJ max (Maximum Junction Temperature) | +150°C - Enables operation in under-hood environments with minimal derating |
| RθJL (Junction-to-Lead Thermal Resistance) | 25°C/W - Allows direct heat transfer to PCB copper or heatsink via cathode lead |
| MSL (Moisture Sensitivity Level) | Level 1 (per J-STD-020) - No bake required before reflow; compatible with standard SMT lines |
Pinout & Package
Package: DO-214AC (SMA), surface-mount plastic case with cathode band polarity indicator, 0.070 g mass, UL 94V-0 rated molding compound, and JESD 201 Class 2 whisker-resistant matte tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to input/source side of converter or battery positive in reverse-protection topology |
| Cathode | Current exit point during forward conduction; marked by band | Primary thermal path to PCB; connects to output/load or battery negative in reverse-protection |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Guard ring structure | Enhances ruggedness against transient overvoltage without external snubbers |
| Low VF and high IFSM synergy | Enables compact, high-efficiency 12 V–24 V power stages with minimal thermal margin overhead |
| Halogen-free & RoHS compliant | Meets global environmental compliance mandates for automotive and industrial OEMs |
| Automated placement compatible | DO-214AC footprint and lead geometry support high-yield pick-and-place at >30,000 UPH |
Applications
| Automotive LED Headlamp Driver | 12 V Automotive DC/DC Buck Converter |
|---|---|
Use Scenario: High-brightness LED arrays powered from vehicle battery with PWM dimming and thermal foldback. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous or asynchronous buck topology, conducting during low-side switch off-time. Use Value: 0.55 V VF reduces power loss by >30% vs. standard PN diodes, lowering heatsink requirements and improving lumen maintenance over lifetime. | Use Scenario: Point-of-load regulation for infotainment or ADAS ECUs in start-stop vehicles. IC Role / Device Role / Timing Role: Output rectifier handling continuous 3 A load with fast transient response. Use Value: 70 A IFSM withstands cold-crank surges; 150°C TJ rating ensures stable operation during prolonged engine-off battery drain conditions. |
| Reverse Battery Protection Circuit | Low-Voltage Inverter for HVAC Blower Motor |
Use Scenario: Preventing damage during incorrect battery terminal connection in body control modules. IC Role / Device Role / Timing Role: Series-connected anode-to-battery-positive, blocking reverse current flow. Use Value: Low 20 V VRRM matches system voltage while minimizing forward drop penalty; MSL Level 1 simplifies manufacturing integration. | Use Scenario: 12 V–24 V inverter driving brushed DC blower motors in cabin climate control. IC Role / Device Role / Timing Role: Freewheeling path for motor back-EMF during PWM commutation. Use Value: High dV/dt (10,000 V/µs) prevents false turn-on during rapid voltage transitions; guard ring improves immunity to line transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS32HE3/57T (Vishay) | Same 3 A / 20 V rating; VF = 0.5 V typ (25°C); slightly lower IFSM (50 A) | Lacks AEC-Q101 qualification; intended for commercial-industrial use | Preferred where automotive qualification is not required and lower VF is prioritized |
| SB320-E3/57T (Vishay) | Same 3 A / 20 V; VF = 0.52 V typ; IFSM = 60 A; RoHS-compliant but not halogen-free | No AEC-Q101 validation; different thermal resistance (RθJA = 70°C/W) | Suitable for cost-sensitive non-automotive designs needing proven field history |
Compared with SS32HE3/57T and SB320-E3/57T, the SK32AHR3G provides AEC-Q101 assurance, halogen-free construction, and superior surge robustness (70 A), making it the preferred choice for automotive front-end power stages where reliability and regulatory compliance are mandatory.
Availability
SK32AHR3G is available at Aetrix Electronics and suitable for automotive LED lighting, 12 V DC/DC converters, and reverse battery protection circuits requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SK32AHR3G 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 SK32AHR3G belongs to TSC's AEC-Q101-qualified Schottky rectifier family, engineered specifically for high-reliability 12 V–24 V automotive power conversion where low VF, high surge tolerance, and process consistency are critical.
FAQ
What is the maximum junction temperature rating for SK32AHR3G?
The SK32AHR3G has a maximum junction temperature (TJ max) of +150°C, allowing uninterrupted operation in under-hood automotive environments. This rating is validated per AEC-Q101 stress tests and enables full 3 A current delivery at ambient temperatures up to +105°C when mounted on 1-in² 2-oz copper with standard airflow. The SK32AHR3G must be thermally anchored to PCB copper to maintain this performance.
Is SK32AHR3G suitable for reverse battery protection in automotive ECUs?
Yes, SK32AHR3G is widely used for reverse battery protection due to its 20 V VRRM rating - sufficient for 12 V systems with load dump margin - and low 0.55 V forward voltage, which minimizes power loss and heat generation. Its AEC-Q101 qualification, guard ring, and MSL Level 1 ensure robustness and manufacturability in automotive ECU production. The SK32AHR3G is placed anode-to-battery-positive in series with the power rail.
Does SK32AHR3G have halogen-free and RoHS-compliant construction?
Yes, SK32AHR3G is both halogen-free and RoHS compliant, meeting EU Directive 2011/65/EU and automotive industry requirements for restricted substances. The molding compound contains no brominated flame retardants, and the matte tin-plated leads comply with JEDEC J-STD-002 solderability standards. This dual compliance is documented in TSC's material declarations for SK32AHR3G.
What is the surge current rating of SK32AHR3G and how is it tested?
The SK32AHR3G has a non-repetitive peak forward surge current (IFSM) rating of 70 A, measured using an 8.3 ms single half-sine wave superimposed on rated DC load. This rating is verified per JESD22-A112 and reflects real-world capability to survive cold-crank and jump-start events in automotive applications. The SK32AHR3G maintains this rating across its full operating temperature range from –55°C to +150°C.
What packaging format is available for SK32AHR3G?
SK32AHR3G is supplied in 7,500-unit tape-and-reel packaging per DO-214AC (SMA) industry standard, compatible with all major SMT pick-and-place equipment. The reel meets EIA-481-D specifications, and the device marking "SK32A" with green compound (G) and date code is laser-etched per TSC's HQ2SD07-DO214SMC-034 REV A package drawing. No tray or bulk options are offered for SK32AHR3G.
SK32AHR3G 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):
- 20 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 3 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-214AC (SMA)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SK32AHR3G FAQ
1.How can I place an order for SK32AHR3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK32AHR3G 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 SK32AHR3G reliable?
The price and inventory of SK32AHR3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK32AHR3G is usually 5 days.
3.What payment methods are accepted for SK32AHR3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK32AHR3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK32AHR3G?
SK32AHR3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK32AHR3G 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 SK32AHR3G?
For technical support, including SK32AHR3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK32AHR3G requirements.
6.How does Aetrix verify that SK32AHR3G is sourced from the original manufacturer or authorized distributors?
All SK32AHR3G 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 SK32AHR3G meets industry standards.
7.What is the process for return or replacement of SK32AHR3G?
All SK32AHR3G units undergo pre-shipment inspection (PSI). If there is an issue with SK32AHR3G, 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 SK32AHR3G part is unused and in its original packaging.
Return procedure for SK32AHR3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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