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Taiwan Semiconductor Corporation SK22AHR3G
- Part No.:
- SK22AHR3G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SK22AHR3G.pdf
- Description:
- DIODE SCHOTTKY 20V 2A DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,132
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Product details
Overview
SK22AHR3G from Taiwan Semiconductor is a 2 A, 20 V Schottky barrier surface-mount rectifier in DO-214AC (SMA) package, qualified to AEC-Q101, with 0.50 V forward voltage at 2 A and 25 °C, 50 A surge current capability, and junction temperature rating up to +125 °C. It serves as a low-loss freewheeling or reverse-battery protection diode in automotive lighting and DC/DC converters.
For engineers reviewing the SK22AHR3G datasheet, SK22AHR3G pinout, SK22AHR3G application, or SK22AHR3G equivalent, key selection criteria include its 20 V repetitive peak reverse voltage, 0.50 V typical VF at rated current, AEC-Q101 qualification, moisture sensitivity level 1, and DO-214AC mechanical compatibility for automated SMT placement.
Technical Context
The SK22AHR3G implements a single-die Schottky structure optimized for low forward voltage drop and fast switching, enabling high-efficiency operation in high-frequency DC/DC topologies. Its guard ring design enhances over-voltage robustness, while the matte tin-plated leads ensure solderability per J-STD-002.
Thermal performance is defined by a junction-to-ambient thermal resistance of 88 °C/W under standard PCB mounting conditions. The device operates across –55 °C to +125 °C junction temperature range and supports non-repetitive surge currents up to 50 A (8.3 ms half-sine).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum repetitive reverse blocking voltage; sets upper limit for safe operation in reverse-biased circuits. |
| IF | 2 A - Continuous average forward current rating; defines steady-state power handling capacity. |
| VF @ 2 A, 25 °C | 0.50 V max - Low conduction loss enables >90% efficiency in low-voltage power stages. |
| IFSM | 50 A - Peak non-repetitive surge current; withstands inrush and fault transients without failure. |
| TJ max | +125 °C - Maximum operating junction temperature; supports under-hood automotive environments. |
| RθJA | 88 °C/W - Thermal resistance determines required PCB copper area for thermal management. |
| MSL | Level 1 - No floor life limitation; suitable for standard reflow without dry-pack requirements. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount plastic case with cathode band polarity indicator; dimensions per JEDEC DO-214AC, weight ≈0.070 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck converter); requires thermal pad connection for heat dissipation. |
| Cathode | Forward current exit / reverse-blocking terminal | Marked by band; ties to higher-potential rail (e.g., input bus); critical for reverse-battery protection orientation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan. |
| Guard ring structure | Improves edge termination robustness, raising dV/dt rating to 10,000 V/µs and reducing risk of avalanche-induced failure. |
| Low VF (0.50 V) | Reduces conduction loss by ~30% vs. comparable 20 V Si PN diodes, directly improving system efficiency in 5–12 V rails. |
| Moisture sensitivity level 1 | Eliminates bake requirements prior to reflow, streamlining high-volume SMT assembly without yield impact. |
| Halogen-free & RoHS compliant | Meets EU Directive 2011/65/EU and IPC-1752A reporting standards for green electronics manufacturing. |
Applications
| Automotive LED Lighting | 12 V DC/DC Buck Converter Output Rectification |
|---|---|
Use Scenario: Reverse polarity protection in headlamp control modules exposed to battery jump-start events. IC Role / Device Role / Timing Role: Standalone unidirectional blocking element placed between battery input and downstream regulator. Use Value: Withstands 50 A surge and blocks reverse current below 0.5 µA at 12 V, preventing damage during incorrect cable connection. | Use Scenario: Secondary-side rectification in 12 V → 5 V/3.3 V synchronous-buck-derived topology. IC Role / Device Role / Timing Role: Freewheeling path during high-side MOSFET off-time; conducts continuous 2 A load current. Use Value: 0.50 V VF minimizes power loss (≤1 W at full load), reducing heatsink need and improving light-load efficiency. |
| Reverse Battery Protection in Infotainment Systems | Low-Voltage Industrial Sensor Power Supply |
Use Scenario: Input protection for 5 V microcontroller-based audio amplifiers powered from vehicle battery. IC Role / Device Role / Timing Role: Series-connected anode-to-battery, cathode-to-system; blocks reverse current when battery terminals are swapped. Use Value: 20 V VRRM exceeds nominal 12 V system with margin for load dump spikes; <0.5 mA IR at 12 V ensures minimal standby drain. | Use Scenario: Input rectification for 3.3 V isolated DC/DC module powering RS-485 transceivers in factory automation nodes. IC Role / Device Role / Timing Role: AC-to-DC conversion stage feeding linear regulator; handles 2 A peak transient loads. Use Value: MSL Level 1 and –55 °C to +125 °C operation support unheated industrial enclosures with wide ambient swings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB220-TB | Same 20 V VRRM and 2 A IF, but VF = 0.55 V max at 2 A; no AEC-Q101 qualification. | Not approved for automotive use; limited to commercial/industrial environments. | Select SB220-TB only if AEC-Q101 compliance is not required and slightly higher VF is acceptable. |
| SS22 | 20 V VRRM, 2 A IF, VF = 0.52 V max; RoHS-compliant but MSL Level 2a (floor life 1 year). | Requires dry pack and bake before reflow if stored >1 year; unsuitable for long-term inventory without controls. | Choose SS22 only when supply chain logistics allow strict MSL handling and AEC-Q101 is optional. |
Compared with SK22AHR3G, SB220-TB lacks automotive qualification and has higher conduction loss, while SS22 introduces MSL handling complexity-making SK22AHR3G the optimal choice for automotive and high-reliability industrial designs requiring zero reflow risk and guaranteed qualification.
Availability
SK22AHR3G is available at Aetrix Electronics and suitable for automotive LED lighting, 12 V DC/DC converter output rectification, and reverse battery protection requiring stable component supply and AEC-Q101 assurance.
Supply support for SK22AHR3G 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 automotive, industrial, and consumer markets since 1979.
The SK22AHR3G belongs to TSC's AEC-Q101-qualified Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in automotive and harsh-environment applications.
FAQ
What is the maximum junction temperature rating for SK22AHR3G?
The SK22AHR3G has a maximum junction temperature (TJ max) of +125 °C, validated per its AEC-Q101 qualification. This rating allows reliable operation in under-hood automotive environments and industrial enclosures without active cooling, provided thermal design meets the 88 °C/W RθJA limit under specified PCB conditions.
Is SK22AHR3G pin-compatible with other DO-214AC Schottky diodes?
Yes, SK22AHR3G uses the standard DO-214AC (SMA) package with anode and cathode terminals in the industry-standard configuration. Its physical footprint and solder pad layout match all JEDEC-compliant DO-214AC devices, enabling direct PCB replacement where electrical parameters align.
Does SK22AHR3G meet automotive reliability standards?
Yes, SK22AHR3G is fully AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and electrostatic discharge (ESD) per the AEC-Q101-004 and -005 standards. This certification confirms suitability for automotive powertrain, body, and infotainment systems.
What is the forward voltage specification for SK22AHR3G at 2 A and 100 °C?
The SK22AHR3G datasheet does not specify VF at 100 °C and 2 A. However, based on typical Schottky behavior and curve data in Figure 4, VF increases approximately 0.05–0.08 V above the 25 °C value (0.50 V), yielding an estimated VF of 0.55–0.58 V at 100 °C and 2 A.
How is polarity indicated on the SK22AHR3G package?
Polarity on the SK22AHR3G is indicated by a visible cathode band printed on the molded plastic body of the DO-214AC (SMA) package. The banded end corresponds to the cathode terminal, and the opposite end is the anode-consistent with JEDEC DO-214AC mechanical drawing and marking diagram in the SK22AH–SK215AH datasheet.
SK22AHR3G 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):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 500 mV @ 2 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
SK22AHR3G FAQ
1.How can I place an order for SK22AHR3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK22AHR3G 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 SK22AHR3G reliable?
The price and inventory of SK22AHR3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK22AHR3G is usually 5 days.
3.What payment methods are accepted for SK22AHR3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK22AHR3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK22AHR3G?
SK22AHR3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK22AHR3G 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 SK22AHR3G?
For technical support, including SK22AHR3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK22AHR3G requirements.
6.How does Aetrix verify that SK22AHR3G is sourced from the original manufacturer or authorized distributors?
All SK22AHR3G 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 SK22AHR3G meets industry standards.
7.What is the process for return or replacement of SK22AHR3G?
All SK22AHR3G units undergo pre-shipment inspection (PSI). If there is an issue with SK22AHR3G, 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 SK22AHR3G part is unused and in its original packaging.
Return procedure for SK22AHR3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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