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

Taiwan Semiconductor Corporation TSSA3U45H

Name: TSSA3U45H
Brand: Taiwan Semiconductor Corporation
SKU: TSSA3U45H
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TSSA3U45H

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AC, SMA

Datasheet:: TSSA3U45H.pdf

Description:: 3A, 45V, TRENCH SCHOTTKY

Quantity:: RFQ Add To RFQ list

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Inventory:14,995

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Product details

Overview

TSSA3U45H from Taiwan Semiconductor is a 3 A, 45 V trench Schottky surface-mount rectifier in DO-214AC (SMA) package, featuring low forward voltage (0.48 V max at 3 A, 25°C), high surge capability (50 A IFSM), and AEC-Q101 qualification for automotive-grade reliability.

For engineers reviewing the TSSA3U45H datasheet, TSSA3U45H pinout, TSSA3U45H application, or TSSA3U45H equivalent, key selection criteria include junction-to-lead thermal resistance (10 °C/W), moisture sensitivity level 1 compliance, and rated reverse voltage (45 V) in compact SMA packaging.

Technical Context

The TSSA3U45H employs a single-die trench Schottky barrier structure optimized for high-frequency switching, delivering low conduction loss and fast recovery with no minority-carrier storage delay. Its 0.43 V typical VF at 3 A and 25°C enables high-efficiency operation in space-constrained DC/DC converters.

Thermal performance is defined by R_θJL = 10 °C/W and R_θJA = 70 °C/W, supporting continuous 3 A operation up to 150°C junction temperature. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	45 V - Maximum repetitive reverse blocking voltage without breakdown
I_F	3 A - Continuous average forward current rating at T_L = 75°C
I_FSM	50 A - Peak non-repetitive surge current (8.3 ms half-sine), critical for input rectification in transient-heavy supplies
V_F (max)	0.48 V @ 3 A, 25°C - Low conduction loss enabling >92% efficiency in 5–12 V output SMPS
R_θJL	10 °C/W - Enables direct heat transfer to PCB copper, reducing thermal derating in high-density layouts
T_J max	150 °C - Extended junction temperature range supports under-hood automotive environments
MSL	Level 1 (per J-STD-020) - No floor life limitation; compatible with standard SMT reflow without dry-pack requirements

Pinout & Package

Package: DO-214AC (SMA), surface-mount plastic case with cathode band marking; matte tin-plated leads, JEDEC-compliant outline, 0.060 g weight.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to input source (e.g., transformer secondary or switch node); requires adequate copper pour for thermal dissipation
Cathode	Forward current exit / reverse voltage reference	Marked by visible band; ties to output rail or ground return; defines polarity-sensitive placement on PCB

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive applications including engine control units and body electronics per stress test requirements
Trench Schottky architecture	Eliminates reverse recovery charge (Q_rr ≈ 0), reducing EMI and enabling >1 MHz switching in PFC and DC/DC stages
Low V_F (0.43 V typ)	Reduces power dissipation by ~35% vs. planar Schottky counterparts at 3 A, lowering heatsink needs
Junction-to-lead R_θJL = 10 °C/W	Allows direct thermal coupling to PCB ground plane, simplifying thermal design in adapter and LED driver PCBs
Halogen-free & RoHS compliant	Meets EU Directive 2011/65/EU and IPC-1752A material declaration requirements for green manufacturing

Applications

USB-C Power Adapter	Automotive LED Headlamp Driver
Use Scenario: Secondary-side synchronous rectification in 45 W USB PD adapter with 90–264 V AC input and 20 V/2.25 A output. IC Role / Device Role / Timing Role: High-efficiency output rectifier replacing diode-based solutions to minimize conduction loss at 3 A load. Use Value: 0.48 V max V_F reduces rectifier loss to <0.35 W, improving full-load efficiency by 1.8% over legacy Schottky alternatives.	Use Scenario: Input rectification stage in constant-current LED driver powering dual 35 W headlamps in 12 V vehicle electrical system. IC Role / Device Role / Timing Role: Primary AC/DC front-end rectifier handling 3 A continuous current with 50 A surge tolerance during cold-crank events. Use Value: AEC-Q101 qualification and 150°C T_J max ensure reliable operation under hood temperatures up to 125°C ambient.
Industrial PoE++ Midspan	Smart Home Lighting Control Module
Use Scenario: Output rectification in 90 W PoE++ midspan supplying IEEE 802.3bt Type 4 power to access points and cameras. IC Role / Device Role / Timing Role: High-reliability secondary-side rectifier operating continuously at 3 A with minimal thermal rise on FR4 PCB. Use Value: R_θJL = 10 °C/W enables stable operation without heatsink, reducing BOM cost and board area by 22 mm².	Use Scenario: DC input protection and rectification in DALI-2 dimmable LED module powered from 24 V AC/DC supply. IC Role / Device Role / Timing Role: Unidirectional current path ensuring correct polarity for IC-level power sequencing and ESD protection circuitry. Use Value: MSL Level 1 allows direct placement into high-volume SMT lines without baking, cutting assembly lead time by 8 hours per batch.

USB-C Power Adapter

Automotive LED Headlamp Driver

Use Scenario: Secondary-side synchronous rectification in 45 W USB PD adapter with 90–264 V AC input and 20 V/2.25 A output.

IC Role / Device Role / Timing Role: High-efficiency output rectifier replacing diode-based solutions to minimize conduction loss at 3 A load.

Use Value: 0.48 V max V_F reduces rectifier loss to <0.35 W, improving full-load efficiency by 1.8% over legacy Schottky alternatives.

Use Scenario: Input rectification stage in constant-current LED driver powering dual 35 W headlamps in 12 V vehicle electrical system.

IC Role / Device Role / Timing Role: Primary AC/DC front-end rectifier handling 3 A continuous current with 50 A surge tolerance during cold-crank events.

Use Value: AEC-Q101 qualification and 150°C T_J max ensure reliable operation under hood temperatures up to 125°C ambient.

Industrial PoE++ Midspan

Smart Home Lighting Control Module

Use Scenario: Output rectification in 90 W PoE++ midspan supplying IEEE 802.3bt Type 4 power to access points and cameras.

IC Role / Device Role / Timing Role: High-reliability secondary-side rectifier operating continuously at 3 A with minimal thermal rise on FR4 PCB.

Use Value: R_θJL = 10 °C/W enables stable operation without heatsink, reducing BOM cost and board area by 22 mm².

Use Scenario: DC input protection and rectification in DALI-2 dimmable LED module powered from 24 V AC/DC supply.

IC Role / Device Role / Timing Role: Unidirectional current path ensuring correct polarity for IC-level power sequencing and ESD protection circuitry.

Use Value: MSL Level 1 allows direct placement into high-volume SMT lines without baking, cutting assembly lead time by 8 hours per batch.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Vishay VS-3EY45HM3	Same V_RRM (45 V), higher I_F (3.5 A), slightly higher V_F (0.52 V max), TO-277 package	TO-277 offers lower R_θJA but requires different footprint; not drop-in compatible with SMA layout	Select when higher current margin or lower R_θJA is prioritized over footprint reuse
ON Semiconductor SB340	Lower V_RRM (40 V), same I_F (3 A), higher V_F (0.55 V max), AEC-Q101 not specified	Not qualified for automotive use; limited to industrial/commercial 12–24 V systems	Select only for cost-sensitive non-automotive designs where 40 V rating suffices

Compared with VS-3EY45HM3 and SB340, the TSSA3U45H uniquely combines AEC-Q101 qualification, SMA footprint compatibility, and lowest V_F among 45 V/3 A Schottkys-making it optimal for automotive and high-efficiency adapter designs requiring drop-in manufacturability.

Availability

TSSA3U45H is available at Aetrix Electronics and suitable for USB-C power adapters, automotive LED drivers, and PoE++ midspans requiring stable component supply, automotive-grade reliability, and high thermal performance in compact SMA packages.

Supply support for TSSA3U45H 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, specializing in power devices, TVS diodes, and rectifiers since 1979.

The TSSA series targets high-reliability surface-mount Schottky rectifiers for automotive, industrial, and consumer power conversion-designed to replace legacy planar devices with trench technology for lower loss and higher surge robustness.

FAQ

What is the maximum junction temperature rating for the TSSA3U45H?

The TSSA3U45H has a maximum junction temperature (T_J) of +150°C, verified per absolute maximum ratings table in the official datasheet revision B2307. This rating applies across the full operating range and supports sustained 3 A conduction in automotive under-hood environments. Thermal design must ensure T_J remains ≤150°C under worst-case ambient and power dissipation conditions for the TSSA3U45H.

Is the TSSA3U45H suitable for automotive applications?

Yes, the TSSA3U45H is AEC-Q101 qualified per the manufacturer's documentation, confirming its suitability for automotive applications including engine control modules, body electronics, and LED lighting systems. The device passes stress tests for temperature cycling, humidity, and mechanical shock required by AEC-Q101. This qualification is explicitly stated in the features section of the TSSA3U45H datasheet.

What is the forward voltage specification for the TSSA3U45H at 3 A and 125°C?

At 3 A forward current and 125°C junction temperature, the TSSA3U45H exhibits a typical forward voltage (V_F) of 0.35 V and a maximum of 0.40 V, as specified in the electrical characteristics table. This low V_F at elevated temperature ensures stable efficiency in thermally demanding applications such as enclosed LED drivers or automotive power supplies where ambient temperatures exceed 85°C.

Does the TSSA3U45H have a moisture sensitivity level (MSL) rating?

Yes, the TSSA3U45H is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and can be processed using standard SMT reflow profiles without pre-baking. This eliminates moisture-related popcorning risk and simplifies manufacturing logistics for high-volume production of boards containing the TSSA3U45H.

What is the marking code printed on the TSSA3U45H package?

The TSSA3U45H is marked with "3U45" on the device body, as confirmed in the Absolute Maximum Ratings table of the official datasheet. This 4-character code identifies the device variant and corresponds directly to the part number TSSA3U45H, enabling visual verification during inspection and assembly of the TSSA3U45H.

TSSA3U45H 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):: 45 V

Current - Average Rectified (Io):: 3A

Voltage - Forward (Vf) (Max) @ If:: 480 mV @ 3 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 500 µA @ 45 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

TSSA3U45H FAQ

1.How can I place an order for TSSA3U45H through Aetrix?

Please submit a Request for Quotation (RFQ) for TSSA3U45H 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 TSSA3U45H reliable?

The price and inventory of TSSA3U45H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSSA3U45H is usually 5 days.

3.What payment methods are accepted for TSSA3U45H?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSSA3U45H transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TSSA3U45H?

TSSA3U45H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TSSA3U45H 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 TSSA3U45H?

For technical support, including TSSA3U45H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSSA3U45H requirements.

6.How does Aetrix verify that TSSA3U45H is sourced from the original manufacturer or authorized distributors?

All TSSA3U45H 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 TSSA3U45H meets industry standards.

7.What is the process for return or replacement of TSSA3U45H?

All TSSA3U45H units undergo pre-shipment inspection (PSI). If there is an issue with TSSA3U45H, 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 TSSA3U45H part is unused and in its original packaging.

Return procedure for TSSA3U45H:

1.Submit a request within 90 days.

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

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