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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Taiwan Semiconductor Corporation SK22AHM2G

Name: SK22AHM2G
Brand: Taiwan Semiconductor Corporation
SKU: SK22AHM2G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SK22AHM2G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AC, SMA

Datasheet:: SK22AHM2G.pdf

Description:: DIODE SCHOTTKY 20V 2A DO214AC

Quantity:: RFQ Add To RFQ list

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Inventory:5,413

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Product details

Overview

SK22AHM2G 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 rating, and junction temperature 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 SK22AHM2G datasheet, SK22AHM2G pinout, SK22AHM2G application, or SK22AHM2G equivalent, key selection criteria include its 20 V V_RRM, 0.50 V V_F at rated current, AEC-Q101 qualification, DO-214AC thermal resistance of 88 °C/W, and moisture sensitivity level 1 compliance.

Technical Context

This Schottky rectifier uses a single-die construction with guard ring for over-voltage protection and matte tin-plated leads solderable per J-STD-002. Its low forward voltage enables high efficiency in low-voltage, high-frequency switching applications.

The device operates across –55 °C to +125 °C junction temperature range, supports 10,000 V/µs critical dV/dt, and delivers 20 mJ non-repetitive avalanche energy at L = 40 mH - enabling robust performance in transient-prone automotive power rails.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	20 V - Maximum repetitive reverse voltage before breakdown; defines safe operating reverse bias in 12 V automotive systems.
I_F	2 A - Continuous average forward current; supports sustained conduction in compact DC/DC output stages.
V_F @ 2 A, 25 °C	0.50 V - Low conduction loss; reduces power dissipation to ≤1.0 W at full load, easing thermal design.
I_FSM	50 A - Peak surge current capability; withstands inrush and fault transients without failure.
R_θJA	88 °C/W - Junction-to-ambient thermal resistance; enables operation at full current with minimal heatsinking on standard FR-4 PCB.
T_J max	125 °C - Maximum junction temperature; aligns with under-hood automotive ambient requirements.
MSL	Level 1 - No floor life limitation; allows indefinite storage and standard reflow without baking.

Pinout & Package

Package: DO-214AC (SMA), molded plastic case meeting UL 94V-0, polarity indicated by cathode band, weight ≈ 0.070 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side (e.g., ground or switch node); accepts 2 A continuous forward flow.
Cathode	Forward current exit / reverse blocking terminal	Marked by band; blocks up to 20 V reverse voltage and conducts when anode > cathode by ≥0.5 V.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for car lighting and body control modules.
Guard ring structure	Enhances edge termination robustness, improving V_RRM consistency and reducing risk of premature avalanche at high dV/dt.
Low V_F (0.50 V)	Minimizes conduction loss in high-duty-cycle freewheeling paths, increasing converter efficiency by ~1–2% versus higher-V_F alternatives.
Moisture sensitivity level 1	Eliminates pre-reflow baking requirement, streamlining SMT assembly and reducing production cost and handling risk.
Halogen-free & RoHS compliant	Meets global environmental regulations and supports lead-free reflow profiles without compromising thermal or electrical performance.

Applications

Automotive LED Lighting	12 V DC/DC Buck Converter Output
Use Scenario: Reverse polarity protection in headlamp or tail lamp driver circuits powered from vehicle battery. IC Role / Device Role / Timing Role: Discrete Schottky rectifier providing unidirectional current path and blocking reverse battery connection. Use Value: Prevents damage to downstream LED drivers during jump-start or battery misconnection; 0.50 V V_F limits heat generation in confined lamp housings.	Use Scenario: Freewheeling diode in synchronous or non-synchronous buck regulator supplying microcontrollers or sensors. IC Role / Device Role / Timing Role: Provides low-loss return path for inductor current during high-side switch off-time. Use Value: Enables >92% efficiency at 2 A load; 50 A I_FSM handles startup surges without derating.
Reverse Battery Protection	Low-Voltage Industrial Power Rail
Use Scenario: Input protection for 24 V industrial controllers connected to field wiring subject to accidental polarity reversal. IC Role / Device Role / Timing Role: Series-blocking diode placed between connector and main power rail. Use Value: Withstands 20 V reverse bias continuously; MSL Level 1 ensures no moisture-related popcorning during reflow of assembled boards.	Use Scenario: Output rectification in isolated 5 V or 3.3 V flyback supplies for PLC I/O modules. IC Role / Device Role / Timing Role: Secondary-side Schottky rectifier delivering regulated low-voltage DC to logic circuitry. Use Value: 88 °C/W R_θJA allows full 2 A operation on standard 2-layer PCB without thermal vias or copper pours.

Automotive LED Lighting

12 V DC/DC Buck Converter Output

Use Scenario: Reverse polarity protection in headlamp or tail lamp driver circuits powered from vehicle battery.

IC Role / Device Role / Timing Role: Discrete Schottky rectifier providing unidirectional current path and blocking reverse battery connection.

Use Value: Prevents damage to downstream LED drivers during jump-start or battery misconnection; 0.50 V V_F limits heat generation in confined lamp housings.

Use Scenario: Freewheeling diode in synchronous or non-synchronous buck regulator supplying microcontrollers or sensors.

IC Role / Device Role / Timing Role: Provides low-loss return path for inductor current during high-side switch off-time.

Use Value: Enables >92% efficiency at 2 A load; 50 A I_FSM handles startup surges without derating.

Reverse Battery Protection

Low-Voltage Industrial Power Rail

Use Scenario: Input protection for 24 V industrial controllers connected to field wiring subject to accidental polarity reversal.

IC Role / Device Role / Timing Role: Series-blocking diode placed between connector and main power rail.

Use Value: Withstands 20 V reverse bias continuously; MSL Level 1 ensures no moisture-related popcorning during reflow of assembled boards.

Use Scenario: Output rectification in isolated 5 V or 3.3 V flyback supplies for PLC I/O modules.

IC Role / Device Role / Timing Role: Secondary-side Schottky rectifier delivering regulated low-voltage DC to logic circuitry.

Use Value: 88 °C/W R_θJA allows full 2 A operation on standard 2-layer PCB without thermal vias or copper pours.

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	V_RRM = 20 V, V_F = 0.55 V @ 2 A, R_θJA = 95 °C/W, non-AEC-Q101	Lacks automotive qualification; suitable for commercial-industrial use only	Prefer SK22AHM2G where AEC-Q101 compliance is mandatory; SB220-TB offers broader distributor availability.
SS22	V_RRM = 20 V, V_F = 0.52 V @ 2 A, R_θJA = 90 °C/W, MSL Level 1, RoHS	No AEC-Q101 data published; junction temp rating limited to 125 °C same as SK22AHM2G	SS22 is viable for non-automotive designs requiring identical electrical specs and packaging; SK22AHM2G adds validated automotive stress testing.

Compared with SB220-TB and SS22, SK22AHM2G provides verified AEC-Q101 qualification, tighter V_F (0.50 V), and superior thermal resistance (88 °C/W), making it the preferred choice for automotive lighting and under-hood power management where reliability and efficiency are jointly critical.

Availability

SK22AHM2G is available at Aetrix Electronics and suitable for automotive LED lighting, 12 V DC/DC converter output stages, and reverse battery protection circuits requiring stable component supply and long-term lifecycle support.

Supply support for SK22AHM2G 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 semiconductor manufacturer specializing in discrete power devices, analog ICs, and optoelectronics, headquartered in Hsinchu, Taiwan.

The SK22AHM2G belongs to TSC's AEC-Q101-qualified Schottky rectifier family designed specifically for automotive and industrial power conversion applications demanding low V_F, high surge tolerance, and robust thermal performance in DO-214AC packages.

FAQ

What is the maximum junction temperature rating for SK22AHM2G?

The SK22AHM2G has a maximum junction temperature (T_J) rating of +125 °C, verified per AEC-Q101 stress testing. This allows reliable operation in under-hood automotive environments and industrial enclosures where ambient temperatures approach 85 °C, provided thermal design maintains junction temperature below this limit using its 88 °C/W R_θJA.

Is SK22AHM2G suitable for reverse battery protection in 12 V automotive systems?

Yes, SK22AHM2G is explicitly suited for reverse battery protection in 12 V automotive systems. Its 20 V V_RRM, AEC-Q101 qualification, 0.50 V forward voltage, and guard ring structure ensure robust blocking of reverse polarity events while minimizing conduction loss during normal operation - a key requirement in headlamp and body control module designs.

Does SK22AHM2G have moisture sensitivity level (MSL) certification?

Yes, SK22AHM2G is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and requires no baking prior to reflow soldering. This simplifies manufacturing logistics and eliminates moisture-related defects such as popcorn cracking during assembly - confirmed in the official Taiwan Semiconductor datasheet revision C2307.

What is the forward voltage of SK22AHM2G at 2 A and 100 °C junction temperature?

The forward voltage of SK22AHM2G at 2 A and 100 °C junction temperature is not explicitly specified in the datasheet; only the 25 °C value (0.50 V max) is provided. However, typical Schottky behavior shows V_F decreases with rising temperature, so actual V_F at 100 °C is expected to be ~0.45–0.48 V - consistent with SK22AH–SK215AH family trends shown in Fig.4 and Fig.8.

How does SK22AHM2G compare to SK23AHM2G in terms of voltage rating and application suitability?

SK22AHM2G has a 20 V V_RRM, while SK23AHM2G is rated for 30 V. Both share identical package (DO-214AC), current rating (2 A), and thermal specs. SK22AHM2G is optimal for 12 V systems with tight voltage margins (e.g., reverse battery protection), whereas SK23AHM2G suits 24 V industrial rails or designs requiring higher reverse margin - neither is interchangeable without verifying system voltage stress.

SK22AHM2G 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

SK22AHM2G FAQ

1.How can I place an order for SK22AHM2G through Aetrix?

Please submit a Request for Quotation (RFQ) for SK22AHM2G 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 SK22AHM2G reliable?

The price and inventory of SK22AHM2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK22AHM2G is usually 5 days.

3.What payment methods are accepted for SK22AHM2G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK22AHM2G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SK22AHM2G?

SK22AHM2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SK22AHM2G 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 SK22AHM2G?

For technical support, including SK22AHM2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK22AHM2G requirements.

6.How does Aetrix verify that SK22AHM2G is sourced from the original manufacturer or authorized distributors?

All SK22AHM2G 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 SK22AHM2G meets industry standards.

7.What is the process for return or replacement of SK22AHM2G?

All SK22AHM2G units undergo pre-shipment inspection (PSI). If there is an issue with SK22AHM2G, 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 SK22AHM2G part is unused and in its original packaging.

Return procedure for SK22AHM2G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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