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

Taiwan Semiconductor Corporation SSL34H

Name: SSL34H
Brand: Taiwan Semiconductor Corporation
SKU: SSL34H
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SSL34H

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AB, SMC

Datasheet:: SSL34H.pdf

Description:: DIODE SCHOTTKY 40V 3A DO214AB

Quantity:: RFQ Add To RFQ list

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Inventory:3,185

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Product details

Overview

SSL34H from Taiwan Semiconductor is a 40 V, 3 A surface-mount Schottky barrier rectifier in DO-214AB (SMC) package, optimized for high-efficiency switching mode power supplies and lighting applications with low forward voltage (≤0.41 V at 3 A, 25°C) and high surge capability (100 A, 8.3 ms).

For engineers reviewing the SSL34H datasheet, SSL34H pinout, SSL34H application, or SSL34H equivalent, key selection criteria include repetitive peak reverse voltage (40 V), junction temperature range (–55°C to +125°C), thermal resistance (R_θJL = 13°C/W), moisture sensitivity level (MSL 1), and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

The SSL34H is a single-die Schottky rectifier designed for unidirectional DC output conversion in high-frequency SMPS topologies. Its 40 V V_RRM, 3 A average forward current rating, and 100 A non-repetitive surge capability support robust operation under transient load conditions.

Thermal performance is characterized with R_θJL = 13°C/W and R_θJA = 53°C/W on a 16 mm × 16 mm Cu pad PCB, enabling stable thermal management in compact power adapters and LED drivers without forced airflow.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	40 V - Maximum repetitive reverse voltage before breakdown; defines safe operating margin in 24–36 V input SMPS designs.
I_F	3 A - Continuous average forward current at T_A = 25°C; supports sustained output delivery in 15–20 W power stages.
V_F	≤0.41 V @ 3 A, 25°C - Low conduction loss improves efficiency >92% in 12 V output converters.
I_FSM	100 A @ 8.3 ms - Withstands inrush and short-circuit surges without failure in AC/DC front-end stages.
T_J max	+125°C - Enables operation in sealed enclosures or high-ambient environments like LED streetlight drivers.
R_θJL	13°C/W - Low junction-to-lead resistance allows direct heat transfer to PCB copper, reducing need for heatsinks.

Pinout & Package

DO-214AB (SMC) surface-mount package with cathode-indicated band; matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Input current entry point	Connected to positive side of transformer secondary or switch node; handles full 3 A DC current path.
Cathode	Output current exit point	Connected to output filter capacitor; polarity marked by visible band; must route to lowest-impedance ground return.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive power modules requiring extended temperature cycling and humidity exposure reliability.
Guard ring structure	Prevents edge breakdown under voltage transients, improving long-term stability in noisy industrial converters.
MSL Level 1	Zero bake requirement before reflow; compatible with standard SMT assembly lines without moisture-sensitive handling.
RoHS & halogen-free	Meets EU Directive 2011/65/EU and JEDEC JS709E; eliminates brominated flame retardants for safer end-of-life processing.

Applications

LED Lighting Driver	USB-C Power Adapter
Use Scenario: Secondary-side rectification in constant-current LED drivers for outdoor signage and streetlights. IC Role / Device Role / Timing Role: Schottky rectifier converting high-frequency transformer output to regulated DC for LED strings. Use Value: 0.41 V forward drop minimizes thermal rise in thermally constrained aluminum-core PCBs, extending driver lifetime.	Use Scenario: Output rectification in 30–65 W USB PD fast-charging adapters with GaN primary-side switching. IC Role / Device Role / Timing Role: High-efficiency synchronous rectification replacement in quasi-resonant flyback topologies. Use Value: 100 A surge rating absorbs repeated inrush events during plug insertion, preventing premature failure in field use.
Industrial SMPS	Automotive Infotainment Supply
Use Scenario: 24 V input DC-DC converter powering PLC I/O modules in factory automation cabinets. IC Role / Device Role / Timing Role: Primary output rectifier delivering clean 5 V/3.3 V rails to microcontrollers and sensors. Use Value: AEC-Q101 qualification ensures compliance with automotive-grade stress testing, even in non-automotive industrial deployments.	Use Scenario: Power supply rectification in head-unit and display control units exposed to vehicle cabin temperatures up to 105°C ambient. IC Role / Device Role / Timing Role: High-reliability secondary-side rectifier in isolated buck-boost converters feeding audio amplifiers and touch controllers. Use Value: –55°C to +125°C junction range enables uninterrupted operation across cold-start to hot-soak vehicle thermal profiles.

LED Lighting Driver

USB-C Power Adapter

Use Scenario: Secondary-side rectification in constant-current LED drivers for outdoor signage and streetlights.

IC Role / Device Role / Timing Role: Schottky rectifier converting high-frequency transformer output to regulated DC for LED strings.

Use Value: 0.41 V forward drop minimizes thermal rise in thermally constrained aluminum-core PCBs, extending driver lifetime.

Use Scenario: Output rectification in 30–65 W USB PD fast-charging adapters with GaN primary-side switching.

IC Role / Device Role / Timing Role: High-efficiency synchronous rectification replacement in quasi-resonant flyback topologies.

Use Value: 100 A surge rating absorbs repeated inrush events during plug insertion, preventing premature failure in field use.

Industrial SMPS

Automotive Infotainment Supply

Use Scenario: 24 V input DC-DC converter powering PLC I/O modules in factory automation cabinets.

IC Role / Device Role / Timing Role: Primary output rectifier delivering clean 5 V/3.3 V rails to microcontrollers and sensors.

Use Value: AEC-Q101 qualification ensures compliance with automotive-grade stress testing, even in non-automotive industrial deployments.

Use Scenario: Power supply rectification in head-unit and display control units exposed to vehicle cabin temperatures up to 105°C ambient.

IC Role / Device Role / Timing Role: High-reliability secondary-side rectifier in isolated buck-boost converters feeding audio amplifiers and touch controllers.

Use Value: –55°C to +125°C junction range enables uninterrupted operation across cold-start to hot-soak vehicle thermal profiles.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SS34 (ON Semiconductor)	V_RRM = 40 V, I_F = 3 A, VF ≈ 0.52 V @ 3 A - higher forward drop than SSL34H's 0.41 V.	Same DO-214AB footprint but lacks AEC-Q101 qualification; not recommended for automotive-adjacent industrial use.	Select SS34 only if AEC-Q101 is not required and cost is prioritized over thermal efficiency.
SB340 (Diodes Inc.)	V_RRM = 40 V, I_F = 3 A, VF ≈ 0.55 V @ 3 A; R_θJA = 60°C/W - higher thermal resistance than SSL34H's 53°C/W.	Compatible in SMPS adapters but less suitable for thermally dense LED drivers due to reduced thermal margin.	Choose SB340 only when legacy design reuse is critical and board-level thermal relief is available.

Compared with SS34 and SB340, the SSL34H delivers lower conduction loss and superior thermal performance while maintaining AEC-Q101 qualification - making it the preferred choice for space-constrained, high-reliability 40 V rectification where efficiency and automotive-grade validation matter.

Availability

SSL34H is available at Aetrix Electronics and suitable for switching mode power supplies, LED lighting drivers, and USB-C power adapters requiring stable component supply, consistent parametric performance, and automotive-grade reliability assurance.

Supply support for SSL34H 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 management and automotive electronics markets since 1979.

The SSL32H–SSL34H series targets high-efficiency, surface-mount Schottky rectification in cost-sensitive yet reliability-critical applications such as consumer adapters, industrial SMPS, and automotive auxiliary power systems.

FAQ

What is the maximum repetitive peak reverse voltage rating for SSL34H?

The SSL34H has a maximum repetitive peak reverse voltage (V_RRM) of 40 V, as confirmed in the Absolute Maximum Ratings table. This value is specific to the SSL34H variant and distinguishes it from the SSL32H (20 V) and SSL33H (30 V). Operating above 40 V risks irreversible avalanche breakdown and device failure.

Is SSL34H qualified for automotive applications?

Yes, SSL34H is AEC-Q101 qualified per the manufacturer's documentation, confirming its suitability for automotive power modules including infotainment supplies and body control units. The qualification covers temperature cycling, humidity bias, and mechanical shock tests - all verified for the exact SSL34H part number.

What is the forward voltage of SSL34H at rated current and temperature?

The SSL34H exhibits a maximum forward voltage (V_F) of 0.41 V at I_F = 3 A and T_J = 25°C, measured under pulsed conditions (PW = 0.3 ms). This low V_F directly reduces conduction losses in high-duty-cycle applications like LED drivers and compact adapters.

Does SSL34H have moisture sensitivity level (MSL) rating, and what does it mean for assembly?

SSL34H is rated MSL Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30°C/85% RH and requires no baking prior to reflow soldering. This simplifies SMT line integration and eliminates moisture-related popcorning risk during standard lead-free reflow profiles.

What package type does SSL34H use, and how is polarity indicated?

SSL34H uses the DO-214AB (SMC) surface-mount package. Polarity is indicated by a visible cathode band on the molded plastic body - the banded end is the cathode terminal, and the opposite end is the anode. This marking aligns with JEDEC DO-214 standard orientation.

SSL34H Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-214AB, SMC

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 40 V

Current - Average Rectified (Io):: 3A

Voltage - Forward (Vf) (Max) @ If:: 410 mV @ 3 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 500 µA @ 40 V

Capacitance @ Vr, F:: -

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AB (SMC)

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

SSL34H FAQ

1.How can I place an order for SSL34H through Aetrix?

Please submit a Request for Quotation (RFQ) for SSL34H 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 SSL34H reliable?

The price and inventory of SSL34H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SSL34H is usually 5 days.

3.What payment methods are accepted for SSL34H?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SSL34H transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SSL34H?

SSL34H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SSL34H 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 SSL34H?

For technical support, including SSL34H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SSL34H requirements.

6.How does Aetrix verify that SSL34H is sourced from the original manufacturer or authorized distributors?

All SSL34H 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 SSL34H meets industry standards.

7.What is the process for return or replacement of SSL34H?

All SSL34H units undergo pre-shipment inspection (PSI). If there is an issue with SSL34H, 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 SSL34H part is unused and in its original packaging.

Return procedure for SSL34H:

1.Submit a request within 90 days.

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

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