Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Taiwan Semiconductor Corporation SS22L

Name: SS22L
Brand: Taiwan Semiconductor Corporation
SKU: SS22L
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SS22L

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: SOD-123

Datasheet:: SS22L.pdf

Description:: 2A, 20V, SCHOTTKY RECTIFIER

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:5,711

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

SS22L from Taiwan Semiconductor is a 2 A, 20 V Schottky barrier surface-mount rectifier in Sub SMA package, featuring low forward voltage (0.50 V at 2 A, 25°C), 50 A peak surge current capability, and junction temperature rating up to +125°C. It serves as a high-efficiency output rectifier in compact DC-DC converters and AC-DC adapters.

For engineers reviewing the SS22L datasheet, SS22L pinout, SS22L application, or SS22L equivalent, key selection factors include its 20 V repetitive peak reverse voltage, 0.50 V forward drop at rated current, Sub SMA thermal performance (R_θJL = 17°C/W), and J-STD-020 Level 1 moisture sensitivity for reflow compatibility.

Technical Context

The SS22L implements a single-die Schottky junction optimized for low-loss switching rectification in high-frequency power supplies. Its 20 V V_RRM, 2 A average forward current, and 50 A I_FSM support robust transient handling in space-constrained topologies.

Thermal design is enabled by R_θJL = 17°C/W and R_θJA = 75°C/W, with polarity indicated by cathode band and matte tin-plated leads compliant with J-STD-002 solderability standards.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	20 V - Maximum repetitive reverse blocking voltage; defines safe operating range in low-voltage secondary-side rectification
I_F	2 A - Continuous average forward current at T_L = 75°C; sets steady-state power delivery capacity
V_F	0.50 V @ 2 A, 25°C - Low conduction loss enabling >90% efficiency in 3.3–12 V output rails
I_FSM	50 A - Peak non-repetitive surge current (8.3 ms half-sine); withstands inrush and fault transients
T_J max	+125°C - Maximum junction temperature; enables operation in sealed or thermally constrained enclosures
R_θJL	17°C/W - Junction-to-lead thermal resistance; supports direct PCB copper pour heat sinking without heatsink
Package	Sub SMA - Compact surface-mount outline (4.5 × 2.7 × 2.1 mm) compatible with automated placement and reflow

Pinout & Package

Sub SMA package: 2-terminal surface-mount device with cathode band marking; anode and cathode terminals defined by molded case polarity indicator.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry node	Connected to lower-potential side (e.g., transformer secondary center-tap or switch node)
Cathode	Forward current exit node	Connected to output filter capacitor positive terminal; marked by visible band on body

Key Features

Feature	Design Value
Guard ring structure	Enhances ruggedness against voltage transients and improves dv/dt immunity (10,000 V/μs rated)
Low forward voltage	0.50 V at 2 A reduces conduction loss by ~30% vs. comparable Si diodes, lowering thermal load
J-STD-020 Level 1 MSL	Zero floor life limitation - no baking required before reflow, simplifying SMT line logistics
Halogen-free construction	Complies with IEC 61249-2-21; eliminates corrosive halogen emissions during PCB assembly and end-of-life
UL 94V-0 molding compound	Self-extinguishing encapsulant meets safety standards for enclosed power supply designs

Applications

USB-C PD Adapters	Point-of-Load DC-DC Converters
Use Scenario: Secondary-side synchronous rectification in 20–65 W USB-C power adapters operating at 100–500 kHz switching frequency. IC Role / Device Role / Timing Role: Schottky rectifier replacing MOSFET-based synchronous rectifiers where gate drive complexity must be avoided. Use Value: 0.50 V forward drop minimizes conduction loss at 3.3–20 V outputs, enabling compact thermal design without active cooling.	Use Scenario: Output rectification in isolated or non-isolated buck-derived DC-DC modules powering FPGAs, ASICs, or DDR memory rails. IC Role / Device Role / Timing Role: Primary unidirectional current path delivering regulated 1.2–12 V from high-frequency transformer or inductor output. Use Value: 50 A surge rating handles startup inrush and load-step transients common in digital load applications.
Industrial IoT Power Supplies	LED Driver Secondary Rectification
Use Scenario: Compact 12–24 V input AC-DC power supplies for battery-backed sensors and edge controllers in harsh environments. IC Role / Device Role / Timing Role: Input-stage bridge rectifier or output-stage freewheeling diode in flyback or forward converter topologies. Use Value: +125°C junction rating ensures reliability under sustained ambient temperatures up to +85°C with derated current.	Use Scenario: Constant-current LED driver output stage converting high-frequency AC from resonant LLC stages to DC for LED strings. IC Role / Device Role / Timing Role: High-efficiency freewheeling path during transformer reset phase in quasi-resonant topologies. Use Value: Low capacitance and fast recovery minimize switching losses at 300–700 kHz, preserving driver efficiency.

USB-C PD Adapters

Point-of-Load DC-DC Converters

Use Scenario: Secondary-side synchronous rectification in 20–65 W USB-C power adapters operating at 100–500 kHz switching frequency.

IC Role / Device Role / Timing Role: Schottky rectifier replacing MOSFET-based synchronous rectifiers where gate drive complexity must be avoided.

Use Value: 0.50 V forward drop minimizes conduction loss at 3.3–20 V outputs, enabling compact thermal design without active cooling.

Use Scenario: Output rectification in isolated or non-isolated buck-derived DC-DC modules powering FPGAs, ASICs, or DDR memory rails.

IC Role / Device Role / Timing Role: Primary unidirectional current path delivering regulated 1.2–12 V from high-frequency transformer or inductor output.

Use Value: 50 A surge rating handles startup inrush and load-step transients common in digital load applications.

Industrial IoT Power Supplies

LED Driver Secondary Rectification

Use Scenario: Compact 12–24 V input AC-DC power supplies for battery-backed sensors and edge controllers in harsh environments.

IC Role / Device Role / Timing Role: Input-stage bridge rectifier or output-stage freewheeling diode in flyback or forward converter topologies.

Use Value: +125°C junction rating ensures reliability under sustained ambient temperatures up to +85°C with derated current.

Use Scenario: Constant-current LED driver output stage converting high-frequency AC from resonant LLC stages to DC for LED strings.

IC Role / Device Role / Timing Role: High-efficiency freewheeling path during transformer reset phase in quasi-resonant topologies.

Use Value: Low capacitance and fast recovery minimize switching losses at 300–700 kHz, preserving driver efficiency.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MBR220RLG (ON Semiconductor)	Same 2 A / 20 V rating; TO-277A package (slightly larger footprint); VF = 0.52 V @ 2 A	Higher R_θJA (90°C/W) requires more PCB copper; not Sub SMA footprint-compatible	Select when legacy TO-277A layout exists or higher surge margin (60 A I_FSM) is needed
SS22 (Diotec)	Identical electrical specs; Sub SMA package; RoHS-compliant but not halogen-free per IEC 61249-2-21	No guard ring; lower dv/dt rating (5,000 V/μs); MSL Level 1 identical	Select when halogen-free requirement is waived and cost sensitivity outweighs transient robustness needs

Compared with MBR220RLG and SS22, the SS22L offers superior thermal resistance (R_θJL = 17°C/W), integrated guard ring for overvoltage protection, and halogen-free compliance-making it optimal for space-constrained, high-reliability industrial and adapter designs where board area and long-term material compliance matter.

Availability

SS22L is available at Aetrix Electronics and suitable for USB-C PD adapters, point-of-load DC-DC converters, and industrial IoT power supplies requiring stable component supply, consistent parametric performance, and full traceability across production lots.

Supply support for SS22L 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 and signal conditioning markets since 1979.

The SS22L belongs to TSC's SSxL Schottky rectifier family, engineered specifically for high-efficiency, low-profile secondary-side rectification in high-frequency switching power supplies targeting consumer, industrial, and computing applications.

FAQ

What is the maximum junction temperature rating for the SS22L?

The SS22L has a maximum junction temperature (T_J) rating of +125°C, verified per absolute maximum ratings table in the official Taiwan Semiconductor datasheet Version O2103. This allows reliable operation in thermally demanding environments when used within its derated forward current envelope. The SS22L must not exceed this limit under any steady-state or transient condition to ensure long-term reliability.

Does the SS22L have a guard ring, and what function does it serve?

Yes, the SS22L incorporates a guard ring structure explicitly cited in its features list. This design enhances voltage standoff stability and improves immunity to rapid voltage transients (dv/dt), supporting a rated critical rate of rise of 10,000 V/μs. The guard ring helps prevent premature avalanche breakdown under overvoltage stress, increasing robustness in SMPS and adapter applications where line surges occur.

Is the SS22L compatible with lead-free reflow soldering processes?

Yes, the SS22L is fully compatible with lead-free reflow soldering. Its matte tin-plated leads meet J-STD-002 solderability requirements, and its J-STD-020 moisture sensitivity level is rated Level 1 - meaning it has unlimited floor life and requires no pre-baking prior to reflow. This simplifies manufacturing integration and ensures reliable joint formation under standard Pb-free thermal profiles.

What is the forward voltage drop of the SS22L at its rated current?

The SS22L exhibits a typical forward voltage (V_F) of 0.50 V at 2 A and 25°C, as specified in the Electrical Specifications table of the Taiwan Semiconductor datasheet. This value is measured under pulsed conditions (PW = 0.3 ms) and represents the conduction loss baseline for efficiency calculations in DC-DC and adapter designs using the SS22L.

How does the SS22L differ from the SS23L in terms of voltage rating and application scope?

The SS22L is rated for 20 V repetitive peak reverse voltage (V_RRM), while the SS23L is rated for 30 V. This makes the SS22L suitable for lower-output-voltage applications such as 3.3 V, 5 V, and 12 V DC-DC converters, whereas the SS23L targets 15–24 V rails. Both share identical current, thermal, and packaging specifications, but substituting SS22L in a 30 V design risks reverse breakdown and is not recommended.

SS22L Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: SOD-123

Packaging:: Tape & Reel (TR)

Product Status:: Not For New Designs

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:: Sub SMA

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

SS22L FAQ

1.How can I place an order for SS22L through Aetrix?

Please submit a Request for Quotation (RFQ) for SS22L 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 SS22L reliable?

The price and inventory of SS22L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS22L is usually 5 days.

3.What payment methods are accepted for SS22L?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS22L transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SS22L?

SS22L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SS22L 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 SS22L?

For technical support, including SS22L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS22L requirements.

6.How does Aetrix verify that SS22L is sourced from the original manufacturer or authorized distributors?

All SS22L 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 SS22L meets industry standards.

7.What is the process for return or replacement of SS22L?

All SS22L units undergo pre-shipment inspection (PSI). If there is an issue with SS22L, 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 SS22L part is unused and in its original packaging.

Return procedure for SS22L:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…