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

Taiwan Semiconductor Corporation SS19

Name: SS19
Brand: Taiwan Semiconductor Corporation
SKU: SS19
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SS19

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AC, SMA

Datasheet:: SS19.pdf

Description:: DIODE SCHOTTKY 90V 1A DO214AC

Quantity:: RFQ Add To RFQ list

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Inventory:8,395

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Product details

Overview

SS19 from Taiwan Semiconductor is a 1A, 90V Schottky barrier surface-mount rectifier in DO-214AC (SMA) package, featuring low forward voltage (0.80 V at 1A, 25°C), high surge current capability (40 A), and guard ring overvoltage protection. It is used in switching mode power supplies, DC/DC converters, and TV power stages where efficiency and thermal robustness are critical.

For engineers reviewing the SS19 datasheet, SS19 pinout, SS19 application, or SS19 equivalent, key selection criteria include its 90 V repetitive peak reverse voltage, 0.80 V forward drop at rated current, 100 μA reverse leakage at 25°C, junction temperature rating up to +150°C, and DO-214AC mechanical compatibility with automated SMT assembly.

Technical Context

The SS19 operates as a single-die, unidirectional Schottky rectifier optimized for high-frequency switching applications. Its 90 V V_RRM, 40 A I_FSM, and 10,000 V/μs dV/dt support fast transient immunity in compact power converters.

Thermal performance is defined by R_θJL = 28°C/W and R_θJA = 88°C/W, enabling reliable operation at 1 A continuous forward current up to +150°C junction temperature, with moisture sensitivity level 1 per J-STD-020.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	90 V - Maximum non-repetitive reverse blocking voltage; defines safe operating range in flyback or buck converter output stages
I_F	1 A - Continuous average forward current; supports stable conduction in 12–24 V output rails
V_F @ 1A, 25°C	0.80 V - Low conduction loss improves system efficiency and reduces heatsink requirements
I_R @ V_R, 25°C	100 μA - Low leakage preserves standby power integrity in energy-sensitive designs
I_FSM	40 A - Withstands inrush and fault currents without degradation during startup or overload
T_J max	+150°C - Enables operation in thermally constrained enclosures without derating at full load
R_θJL	28°C/W - Efficient heat transfer to PCB copper; supports high-density layout with minimal thermal relief

Pinout & Package

Package: DO-214AC (SMA), surface-mount, cathode indicated by band. Matte tin-plated leads, J-STD-002 solderable, UL 94V-0 molding compound, weight ≈ 0.060 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Input current entry point	Connected to source-side of switching node; polarity must align with input rail direction
Cathode	Output current exit point	Connected to output filter capacitor or inductor; marked by visible band on body

Key Features

Feature	Design Value
Guard ring structure	Enhances ruggedness against voltage transients and edge breakdown in high-dV/dt environments
Low forward voltage	0.80 V at 1A/25°C reduces conduction loss by ~15% vs. comparable 100 V Si diodes
High surge current rating	40 A I_FSM supports repeated cold-start events in AC/DC adapters without parameter shift
Moisture sensitivity level 1	Enables direct placement without baking; eliminates reflow yield risk in standard SMT lines
Halogen-free & RoHS compliant	Meets IPC-1752A material declaration requirements for global commercial and industrial shipments

Applications

SMPS Output Rectification	DC/DC Converter Freewheeling
Use Scenario: Secondary-side rectification in 24 V, 36 W offline flyback converter powering PoE midspan equipment. IC Role / Device Role / Timing Role: Unidirectional current steering device converting transformer AC output to regulated DC; no timing or control function. Use Value: 0.80 V V_F lowers conduction loss by 0.2 W vs. legacy 1N5819, improving full-load efficiency from 84% to 85.3%.	Use Scenario: Freewheeling path in 12 V → 5 V synchronous buck converter for FPGA core supply. IC Role / Device Role / Timing Role: Passive clamp diode providing current continuity during high-side FET off-time; operates at 500 kHz switching frequency. Use Value: 10,000 V/μs dV/dt rating prevents false turn-on during fast voltage transitions across inductor.
TV Power Supply Standby Rail	Monitor Auxiliary Power Stage
Use Scenario: +5 VSB rectification in LCD TV mainboard, delivering 0.5 A continuously under no-load and light-load conditions. IC Role / Device Role / Timing Role: Standby power rectifier; conducts only during sleep mode, subject to long-term thermal cycling. Use Value: 100 μA I_R at 25°C minimizes quiescent current drain, extending compliance with ENERGY STAR® Level VI standby limits.	Use Scenario: +12 V auxiliary rail rectification in 27″ gaming monitor with USB-C PD input and local DC-DC regulation. IC Role / Device Role / Timing Role: Input-stage rectifier feeding primary-side controller IC; exposed to line surges and ESD coupling paths. Use Value: Guard ring design suppresses localized avalanche, maintaining V_RRM stability after 10,000+ surge cycles per IEC 61000-4-5.

SMPS Output Rectification

DC/DC Converter Freewheeling

Use Scenario: Secondary-side rectification in 24 V, 36 W offline flyback converter powering PoE midspan equipment.

IC Role / Device Role / Timing Role: Unidirectional current steering device converting transformer AC output to regulated DC; no timing or control function.

Use Value: 0.80 V V_F lowers conduction loss by 0.2 W vs. legacy 1N5819, improving full-load efficiency from 84% to 85.3%.

Use Scenario: Freewheeling path in 12 V → 5 V synchronous buck converter for FPGA core supply.

IC Role / Device Role / Timing Role: Passive clamp diode providing current continuity during high-side FET off-time; operates at 500 kHz switching frequency.

Use Value: 10,000 V/μs dV/dt rating prevents false turn-on during fast voltage transitions across inductor.

TV Power Supply Standby Rail

Monitor Auxiliary Power Stage

Use Scenario: +5 VSB rectification in LCD TV mainboard, delivering 0.5 A continuously under no-load and light-load conditions.

IC Role / Device Role / Timing Role: Standby power rectifier; conducts only during sleep mode, subject to long-term thermal cycling.

Use Value: 100 μA I_R at 25°C minimizes quiescent current drain, extending compliance with ENERGY STAR® Level VI standby limits.

Use Scenario: +12 V auxiliary rail rectification in 27″ gaming monitor with USB-C PD input and local DC-DC regulation.

IC Role / Device Role / Timing Role: Input-stage rectifier feeding primary-side controller IC; exposed to line surges and ESD coupling paths.

Use Value: Guard ring design suppresses localized avalanche, maintaining V_RRM stability after 10,000+ surge cycles per IEC 61000-4-5.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Vishay SS19HE3/54	Same 90 V V_RRM, 1 A I_F, DO-214AC package; VF = 0.82 V @ 1A, 25°C; IR = 120 μA @ 25°C	Slightly higher forward drop and leakage; identical thermal resistance and surge rating	Acceptable where <0.02 V V_F increase is tolerable and Vishay sourcing is preferred
ON Semiconductor SS19H	90 V V_RRM, 1 A I_F, DO-214AC; VF = 0.79 V @ 1A, 25°C; IR = 80 μA @ 25°C; R_θJA = 85°C/W	Marginally lower V_F and leakage; slightly improved thermal dissipation	Preferred when optimizing for lowest possible conduction loss and leakage in high-reliability industrial designs

Compared with SS19, SS19HE3/54 trades 0.02 V higher forward voltage for broader global distribution, while SS19H delivers 0.01 V lower V_F and 20 μA less leakage-making it suitable for ultra-low-power standby circuits where every microamp matters.

Availability

SS19 is available at Aetrix Electronics and suitable for switching mode power supplies, DC/DC converters, and TV/monitor auxiliary power stages requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for SS19 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 Company (TSC) is a vertically integrated Taiwanese manufacturer specializing in discrete semiconductors, including rectifiers, transistors, and MOSFETs, with ISO 9001 and IATF 16949 certified facilities.

The SS19 belongs to TSC's SS1x Schottky rectifier family, engineered for cost-effective, high-efficiency AC/DC and DC/DC power conversion in consumer and industrial equipment where reliability and SMT compatibility are essential.

FAQ

What is the maximum junction temperature rating for SS19?

The SS19 has a maximum junction temperature (T_J) rating of +150°C, verified per absolute maximum ratings table in TSC's R2305 datasheet revision. This allows sustained 1 A operation in ambient temperatures up to +85°C with appropriate PCB copper area, and supports thermal cycling in industrial-grade power supplies. The SS19 must not exceed this limit to maintain specified electrical parameters and long-term reliability.

Does SS19 have a guard ring structure, and what benefit does it provide?

Yes, SS19 incorporates a guard ring structure explicitly cited in its features list. This design element prevents premature edge breakdown under high electric field stress, significantly improving ruggedness during voltage transients such as line surges or inductive kickback. In practice, this extends operational life in SMPS output stages where dV/dt exceeds 5,000 V/μs, and is confirmed in TSC's SS12–SS115 family documentation.

What is the forward voltage of SS19 at 1 A and 100°C junction temperature?

The forward voltage of SS19 is 0.70 V at 1 A and 100°C junction temperature, as specified in the Electrical Specifications table of TSC's R2305 datasheet. This value reflects reduced semiconductor resistance at elevated temperature and is critical for thermal design validation-ensuring that conduction losses remain within budget even under worst-case thermal conditions in enclosed power modules.

Is SS19 compatible with lead-free reflow soldering processes?

Yes, SS19 is fully compatible with lead-free reflow soldering. Its matte tin-plated leads meet J-STD-002 solderability requirements, and its DO-214AC package is rated for peak reflow temperatures up to 260°C per JEDEC J-STD-020. The device carries moisture sensitivity level 1, eliminating the need for pre-baking and supporting direct placement in standard high-volume SMT lines.

What is the reverse leakage current of SS19 at rated reverse voltage and 125°C?

The reverse leakage current (I_R) of SS19 is 2 mA at rated 90 V reverse voltage and +125°C junction temperature, as documented in the Electrical Specifications table. This value is measured under pulse test conditions (PW = 30 ms) and represents worst-case leakage in high-temperature operation-critical for evaluating standby power consumption in always-on consumer electronics like smart TVs and monitors.

SS19 Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-214AC, SMA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 90 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 800 mV @ 1 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 100 µA @ 90 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AC (SMA)

Operating Temperature - Junction:: -55°C ~ 150°C

SS19 FAQ

1.How can I place an order for SS19 through Aetrix?

Please submit a Request for Quotation (RFQ) for SS19 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 SS19 reliable?

The price and inventory of SS19 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS19 is usually 5 days.

3.What payment methods are accepted for SS19?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS19 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SS19?

SS19 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SS19 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 SS19?

For technical support, including SS19 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS19 requirements.

6.How does Aetrix verify that SS19 is sourced from the original manufacturer or authorized distributors?

All SS19 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 SS19 meets industry standards.

7.What is the process for return or replacement of SS19?

All SS19 units undergo pre-shipment inspection (PSI). If there is an issue with SS19, 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 SS19 part is unused and in its original packaging.

Return procedure for SS19:

1.Submit a request within 90 days.

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

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