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

Taiwan Semiconductor Corporation SS22

Name: SS22
Brand: Taiwan Semiconductor Corporation
SKU: SS22
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SS22

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AA, SMB

Datasheet:: SS22.pdf

Description:: DIODE SCHOTTKY 20V 2A DO214AA

Quantity:: RFQ Add To RFQ list

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Inventory:4,819

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Product details

Overview

SS22 from Taiwan Semiconductor is a 2 A, 20 V Schottky barrier surface-mount rectifier in DO-214AA (SMB) package, featuring low forward voltage (0.50 V at 2 A, 25°C), high surge current capability (50 A), and guard ring over-voltage protection - deployed in switching mode power supplies and AC/DC adapters.

For engineers reviewing the SS22 datasheet, SS22 pinout, SS22 application, or SS22 equivalent, key selection criteria include its 20 V repetitive peak reverse voltage, 125°C maximum junction temperature, thermal resistance (R_θJL = 24°C/W), and RoHS/halogen-free compliance for industrial power conversion designs.

Technical Context

The SS22 operates as a single-die Schottky rectifier with unidirectional conduction, optimized for high-frequency switching applications where low forward voltage drop and fast recovery are critical. Its 2 A average forward current rating and 50 A non-repetitive surge capability support transient-heavy loads in compact power supplies.

Thermally, it uses a DO-214AA (SMB) package with matte tin-plated leads and achieves R_θJA = 70°C/W and R_θJL = 24°C/W. The device is rated for operation from –55°C to +125°C junction temperature, with moisture sensitivity level 1 per J-STD-020.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	20 V - Maximum repetitive reverse blocking voltage; defines safe operating range in DC-DC output rectification
I_F	2 A - Continuous average forward current; supports mid-power adapter and SMPS secondary-side rectification
I_FSM	50 A - Peak surge current (8.3 ms half-sine); withstands inrush and short-circuit transients without failure
V_F @ 2 A, 25°C	0.50 V - Low conduction loss; reduces heat generation and improves efficiency in 5–24 V output rails
R_θJL	24°C/W - Junction-to-lead thermal resistance; enables direct PCB copper pour cooling for thermal reliability
T_J max	125°C - Maximum junction temperature; allows operation in enclosed, convection-limited environments
I_R @ V_RRM, 25°C	400 µA - Low leakage; preserves efficiency in standby and light-load conditions

Pinout & Package

DO-214AA (SMB) surface-mount package with cathode-indicated polarity band; molded plastic body meets UL 94V-0; matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker testing.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to transformer secondary or switch node; requires adequate copper area for thermal dissipation
Cathode	Forward current exit / reverse-blocking terminal	Marked by band; ties to output rail or filter capacitor; determines output polarity in buck-derived topologies

Key Features

Feature	Design Value
Guard ring structure	Enhances edge termination robustness against voltage transients and localized field crowding
Low V_F (0.50 V @ 2 A)	Reduces conduction loss by ~30% vs. comparable 20 V Si diodes, improving system efficiency at light-to-moderate loads
High I_FSM (50 A)	Supports reliable operation during cold-start, output short, or line-dip events without bond-wire fusing
Moisture sensitivity level 1	Eliminates bake requirement prior to reflow; compatible with standard SMT assembly lines
Halogen-free & RoHS compliant	Meets global environmental regulations and enables use in consumer and industrial end-equipment certifications

Applications

AC/DC Adapters	Switching Mode Power Supplies (SMPS)
Use Scenario: Secondary-side rectification in 5–24 V wall adapters for consumer electronics. IC Role / Device Role / Timing Role: Schottky rectifier replacing conventional PN diodes to minimize conduction loss and improve no-load efficiency. Use Value: 0.50 V forward drop reduces heat rise by >2 W vs. Si diode at 2 A, enabling smaller heatsinks and higher power density.	Use Scenario: Output rectification in isolated flyback or forward converters for industrial control modules. IC Role / Device Role / Timing Role: Unidirectional current path with fast recovery, minimizing reverse recovery charge and EMI. Use Value: 50 A surge rating ensures survival during repeated output short-circuit tests required by IEC/UL safety standards.
LED Lighting Drivers	DC-DC Converter Outputs
Use Scenario: Rectification in constant-current LED driver secondary circuits for commercial lighting. IC Role / Device Role / Timing Role: High-efficiency freewheeling path in buck-derived LED current regulators. Use Value: 125°C junction rating supports operation inside thermally constrained LED housings without derating.	Use Scenario: Synchronous rectifier replacement in 12 V or 24 V intermediate bus converters. IC Role / Device Role / Timing Role: Low-loss output rectifier in non-synchronous topologies where gate drive complexity is avoided. Use Value: R_θJL = 24°C/W enables direct thermal coupling to PCB ground plane, reducing need for thermal vias.

AC/DC Adapters

Switching Mode Power Supplies (SMPS)

Use Scenario: Secondary-side rectification in 5–24 V wall adapters for consumer electronics.

IC Role / Device Role / Timing Role: Schottky rectifier replacing conventional PN diodes to minimize conduction loss and improve no-load efficiency.

Use Value: 0.50 V forward drop reduces heat rise by >2 W vs. Si diode at 2 A, enabling smaller heatsinks and higher power density.

Use Scenario: Output rectification in isolated flyback or forward converters for industrial control modules.

IC Role / Device Role / Timing Role: Unidirectional current path with fast recovery, minimizing reverse recovery charge and EMI.

Use Value: 50 A surge rating ensures survival during repeated output short-circuit tests required by IEC/UL safety standards.

LED Lighting Drivers

DC-DC Converter Outputs

Use Scenario: Rectification in constant-current LED driver secondary circuits for commercial lighting.

IC Role / Device Role / Timing Role: High-efficiency freewheeling path in buck-derived LED current regulators.

Use Value: 125°C junction rating supports operation inside thermally constrained LED housings without derating.

Use Scenario: Synchronous rectifier replacement in 12 V or 24 V intermediate bus converters.

IC Role / Device Role / Timing Role: Low-loss output rectifier in non-synchronous topologies where gate drive complexity is avoided.

Use Value: R_θJL = 24°C/W enables direct thermal coupling to PCB ground plane, reducing need for thermal vias.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor SS22H	Same 20 V V_RRM, 2 A I_F, but rated to 150°C T_J max and features enhanced surge robustness (I_FSM = 60 A)	Preferred for high-ambient-temperature environments (e.g., enclosed LED drivers or automotive under-hood)	Select SS22H when extended thermal margin or higher surge immunity is required; otherwise SS22 offers cost-effective performance for standard industrial adapters
Vishay VS-2EY20-M3	Identical DO-214AA package and 20 V/2 A ratings, but lower typical V_F (0.45 V @ 2 A) and tighter IR spec (≤200 µA @ 25°C)	Better suited for ultra-low-leakage or high-efficiency battery-powered systems with tight standby budgets	Choose VS-2EY20-M3 if sub-0.48 V forward drop or <300 µA leakage at 25°C is mandatory; SS22 remains optimal for general-purpose cost-sensitive designs

Compared with SS22H and VS-2EY20-M3, the SS22 delivers balanced performance for mainstream adapter and SMPS use - offering proven reliability at 125°C, industry-standard surge tolerance, and full RoHS/halogen-free compliance without premium cost or qualification overhead.

Availability

SS22 is available at Aetrix Electronics and suitable for AC/DC adapters, switching mode power supplies, and LED lighting drivers requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for SS22 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 power, automotive, and industrial markets since 1979.

The SS22 belongs to TSC's SS2x series of Schottky rectifiers - engineered specifically for high-efficiency, surface-mount secondary-side rectification in compact, cost-sensitive power conversion systems.

FAQ

What is the maximum junction temperature rating for the SS22?

The SS22 has a maximum junction temperature (T_J) rating of +125°C, as specified in its Absolute Maximum Ratings table. This allows reliable operation in enclosed power supplies and industrial environments where ambient temperatures approach 85°C, provided thermal design accounts for R_θJA = 70°C/W. The SS22 must not be operated beyond this limit to ensure long-term reliability and avoid parametric drift.

Does the SS22 have a cathode marking, and how is polarity identified?

Yes, the SS22 uses a visible cathode band on the DO-214AA (SMB) package body to indicate polarity - the banded end is the cathode terminal. This marking aligns with JEDEC standards and is clearly shown in the official package outline drawing. Correct orientation is essential during PCB layout and assembly to prevent reverse-bias failure or circuit malfunction.

What is the forward voltage drop of the SS22 at 2 A and 100°C junction temperature?

The SS22 exhibits a maximum forward voltage drop (V_F) of 0.40 V at 2 A and 100°C junction temperature, per its Electrical Specifications table. This lower V_F at elevated temperature reflects the positive temperature coefficient of Schottky diodes and contributes to thermal stability in high-load conditions - unlike silicon diodes, which may exhibit rising V_F with temperature.

Is the SS22 suitable for use in RoHS-compliant and halogen-free designs?

Yes, the SS22 is explicitly certified RoHS compliant and halogen-free, as confirmed in the Features section of its datasheet. The molding compound meets UL 94V-0 flammability rating, and the matte tin-plated leads satisfy J-STD-002 solderability requirements - making it fully qualified for consumer, industrial, and medical-grade products requiring strict environmental compliance.

What packaging format is available for the SS22, and what is the reel quantity?

The SS22 is supplied in tape-and-reel packaging per the Ordering Information table, with 3,000 units per reel. This format supports automated SMT placement and is compatible with standard pick-and-place equipment. The DO-214AA (SMB) footprint matches industry-standard pad layouts, and the moisture sensitivity level 1 rating eliminates pre-reflow baking requirements.

SS22 Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-214AA, SMB

Packaging:: Tape & Reel (TR)

Product Status:: Active

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:: 400 µA @ 20 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AA (SMB)

Operating Temperature - Junction:: -55°C ~ 125°C

SS22 FAQ

1.How can I place an order for SS22 through Aetrix?

Please submit a Request for Quotation (RFQ) for SS22 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 SS22 reliable?

The price and inventory of SS22 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS22 is usually 5 days.

3.What payment methods are accepted for SS22?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS22 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SS22?

SS22 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SS22 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 SS22?

For technical support, including SS22 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS22 requirements.

6.How does Aetrix verify that SS22 is sourced from the original manufacturer or authorized distributors?

All SS22 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 SS22 meets industry standards.

7.What is the process for return or replacement of SS22?

All SS22 units undergo pre-shipment inspection (PSI). If there is an issue with SS22, 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 SS22 part is unused and in its original packaging.

Return procedure for SS22:

1.Submit a request within 90 days.

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

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