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

Taiwan Semiconductor Corporation SSL34HR7G

Name: SSL34HR7G
Brand: Taiwan Semiconductor Corporation
SKU: SSL34HR7G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SSL34HR7G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AB, SMC

Datasheet:: SSL34HR7G.pdf

Description:: DIODE SCHOTTKY 40V 3A DO214AB

Quantity:: RFQ Add To RFQ list

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Inventory:5,393

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Product details

Overview

SSL34HR7G from Taiwan Semiconductor is a 3A, 40V Schottky barrier surface-mount rectifier in DO-214AB (SMC) package, featuring VF ≤ 0.41 V at 3 A and IR ≤ 500 μA at 25°C, optimized for high-efficiency switching mode power supplies and DC/DC converters.

For engineers reviewing the SSL34HR7G datasheet, SSL34HR7G pinout, SSL34HR7G application, or SSL34HR7G equivalent, key selection criteria include repetitive peak reverse voltage (40 V), forward surge current rating (100 A), thermal resistance (R_θJL = 13 °C/W), and moisture sensitivity level (MSL 1).

Technical Context

This Schottky rectifier uses a single-die construction with guard ring overvoltage protection and matte tin-plated leads compliant with J-STD-002 solderability. Its low VF and high IFSM support efficient power conversion in compact, automated SMT designs.

Thermal performance is characterized on a 16 mm × 16 mm Cu pad PCB: R_θJA = 53 °C/W, R_θJC = 15 °C/W, enabling reliable operation up to T_J = 125°C in thermally constrained environments.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	40 V - Maximum non-repetitive reverse blocking voltage; defines upper limit for DC bus or output rail voltage handling
I_F	3 A - Continuous average forward current; supports sustained load delivery in adapters and SMPS secondary-side rectification
I_FSM	100 A - Peak surge current (8.3 ms half-sine); withstands inrush and transient overload without failure
V_F	≤ 0.41 V @ 3 A, 25°C - Low conduction loss directly reduces power dissipation and improves system efficiency
R_θJL	13 °C/W - Junction-to-lead thermal resistance; enables effective heat transfer to PCB copper when mounted per JEDEC standard
T_J max	125°C - Maximum junction temperature; sets thermal design margin for ambient and power loss constraints
MSL	Level 1 - No floor life limitation; suitable for standard reflow without dry-pack or baking requirements

Pinout & Package

Package: DO-214AB (SMC), molded plastic case meeting UL 94V-0, polarity indicated by cathode band.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side (e.g., transformer secondary center-tap or switch node return)
Cathode	Forward current exit / reverse voltage blocking terminal	Connected to output rail; cathode band marks this terminal for correct PCB orientation and polarity-sensitive layout

Key Features

Feature	Design Value
Guard ring structure	Enhances ruggedness against transient overvoltage events without external snubbers
Low VF (≤0.41 V)	Reduces conduction losses by >30% vs. comparable 40 V Si diodes, lowering thermal stress in dense layouts
High IFSM (100 A)	Supports robust start-up and fault tolerance in offline AC/DC and isolated DC/DC converters
Halogen-free & RoHS-compliant	Meets global environmental compliance mandates for industrial and consumer end equipment
MSL Level 1	Eliminates pre-bake steps and simplifies manufacturing flow for high-volume SMT assembly

Applications

Laptop Adapter Secondary Rectification	LED Driver Output Stage
Use Scenario: High-frequency flyback converter output rectification in 65 W laptop adapters operating at 65–100 kHz. IC Role / Device Role / Timing Role: Primary unidirectional power switch delivering regulated 20 V output; replaces slower Si diodes to reduce switching losses. Use Value: VF ≤ 0.41 V minimizes conduction loss, enabling >92% efficiency at full load while maintaining thermal headroom on 2-layer PCBs.	Use Scenario: Constant-current LED string driver in commercial downlight fixtures with 36 V output rails. IC Role / Device Role / Timing Role: Output freewheeling rectifier in buck-derived topology; handles continuous 2.5 A DC with 100 A surge capability during hot-plug events. Use Value: Guard ring and MSL Level 1 ensure reliability across reflow cycles and long-term operation under thermal cycling in enclosed luminaires.
Industrial DC/DC Converter Input Protection	USB-C PD Power Path Rectification
Use Scenario: Reverse-polarity and backfeed protection in 24 V input industrial DC/DC modules with wide ambient range (−40°C to +85°C). IC Role / Device Role / Timing Role: Input series Schottky clamp; blocks reverse current while passing forward current with minimal drop. Use Value: IR ≤ 500 μA at 25°C and ≤100 mA at 100°C ensures low leakage in standby, preserving battery-backed control logic integrity.	Use Scenario: Dual-role power path rectification in USB-C PD sink applications requiring 20 V/3 A input capability. IC Role / Device Role / Timing Role: OR-ing diode between two upstream sources (e.g., adapter and battery) to prevent backflow and enable seamless source handover. Use Value: DO-214AB footprint and low R_θJL (13 °C/W) allow direct integration into space-constrained PD controller reference layouts without thermal derating.

Laptop Adapter Secondary Rectification

LED Driver Output Stage

Use Scenario: High-frequency flyback converter output rectification in 65 W laptop adapters operating at 65–100 kHz.

IC Role / Device Role / Timing Role: Primary unidirectional power switch delivering regulated 20 V output; replaces slower Si diodes to reduce switching losses.

Use Value: VF ≤ 0.41 V minimizes conduction loss, enabling >92% efficiency at full load while maintaining thermal headroom on 2-layer PCBs.

Use Scenario: Constant-current LED string driver in commercial downlight fixtures with 36 V output rails.

IC Role / Device Role / Timing Role: Output freewheeling rectifier in buck-derived topology; handles continuous 2.5 A DC with 100 A surge capability during hot-plug events.

Use Value: Guard ring and MSL Level 1 ensure reliability across reflow cycles and long-term operation under thermal cycling in enclosed luminaires.

Industrial DC/DC Converter Input Protection

USB-C PD Power Path Rectification

Use Scenario: Reverse-polarity and backfeed protection in 24 V input industrial DC/DC modules with wide ambient range (−40°C to +85°C).

IC Role / Device Role / Timing Role: Input series Schottky clamp; blocks reverse current while passing forward current with minimal drop.

Use Value: IR ≤ 500 μA at 25°C and ≤100 mA at 100°C ensures low leakage in standby, preserving battery-backed control logic integrity.

Use Scenario: Dual-role power path rectification in USB-C PD sink applications requiring 20 V/3 A input capability.

IC Role / Device Role / Timing Role: OR-ing diode between two upstream sources (e.g., adapter and battery) to prevent backflow and enable seamless source handover.

Use Value: DO-214AB footprint and low R_θJL (13 °C/W) allow direct integration into space-constrained PD controller reference layouts without thermal derating.

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-3EYH04-M3/45	Same 40 V V_RRM, 3 A I_F, but VF = 0.49 V (max) at 3 A; R_θJA = 60 °C/W	Higher conduction loss and thermal resistance limit use in high-density or high-ambient designs	Acceptable where board area allows larger thermal pads or ambient stays below 60°C
ON Semiconductor SB340-TB	40 V V_RRM, 3 A I_F, VF = 0.55 V (max); MSL Level 2a (floor life 1 year)	Requires dry-pack storage and bake prior to reflow; higher VF increases thermal load	Suitable for low-volume prototyping but adds process overhead in production SMT lines

Compared with VS-3EYH04-M3/45 and SB340-TB, SSL34HR7G delivers lower VF (≤0.41 V), superior thermal resistance (R_θJL = 13 °C/W), and MSL Level 1-making it preferred for high-efficiency, high-volume, and thermally constrained applications.

Availability

SSL34HR7G is available at Aetrix Electronics and suitable for switching mode power supplies, LED drivers, and USB-C PD power path designs requiring stable component supply, consistent parametric performance, and full traceability.

Supply support for SSL34HR7G 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 industrial, computing, and consumer markets since 1979.

The SSL3x family-including SSL34HR7G-is engineered specifically for high-current, medium-voltage Schottky rectification in compact SMT power conversion stages, emphasizing low VF, high surge robustness, and manufacturability.

FAQ

What is the maximum repetitive peak reverse voltage rating for SSL34HR7G?

The SSL34HR7G has a maximum repetitive peak reverse voltage (V_RRM) of 40 V, as confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version K2310). This rating defines the highest DC or peak AC reverse voltage the device can block continuously without breakdown, making SSL34HR7G suitable for 36 V nominal output rails and 40 V transient clamping applications.

Does SSL34HR7G have a specified forward voltage at 3 A and 100°C junction temperature?

No-SSL34HR7G's forward voltage (V_F) is specified only at T_J = 25°C (≤0.41 V at I_F = 3 A). The datasheet provides reverse current (I_R) at 100°C (≤100 mA), but no V_F value at elevated temperature. Designers should apply derating curves from Figure 4 (Typical Forward Characteristics) to estimate V_F at higher T_J when using SSL34HR7G in thermally demanding environments.

Is SSL34HR7G compatible with lead-free reflow profiles?

Yes-SSL34HR7G features matte tin-plated leads qualified per J-STD-002 for solderability and is rated MSL Level 1, meaning it is fully compatible with standard lead-free reflow profiles (e.g., IPC/JEDEC J-STD-020 Class 3 peak of 260°C). No pre-baking or special handling is required before assembly, simplifying manufacturing for SSL34HR7G integration.

What does the "HR7G" suffix in SSL34HR7G indicate?

The "HR7G" suffix in SSL34HR7G denotes Taiwan Semiconductor's internal packaging and environmental coding: "H" indicates halogen-free compound, "R7" specifies tape-and-reel packaging (3,000 pcs/reel), and "G" confirms RoHS compliance. This matches the ordering information in the datasheet and distinguishes SSL34HR7G from other variants like SSL34HR3G (different reel size) or SSL34H (bulk packaging).

Can SSL34HR7G replace SSL33HR7G in an existing design?

Yes-SSL34HR7G is a direct upgrade from SSL33HR7G (30 V V_RRM) with identical package (DO-214AB), pinout, and thermal characteristics. Its higher 40 V V_RRM provides increased margin against voltage transients, while maintaining the same 3 A I_F and 100 A I_FSM. No PCB or layout changes are needed when substituting SSL34HR7G for SSL33HR7G in designs where reverse voltage headroom is critical.

SSL34HR7G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-214AB, SMC

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

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

SSL34HR7G FAQ

1.How can I place an order for SSL34HR7G through Aetrix?

Please submit a Request for Quotation (RFQ) for SSL34HR7G 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 SSL34HR7G reliable?

The price and inventory of SSL34HR7G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SSL34HR7G is usually 5 days.

3.What payment methods are accepted for SSL34HR7G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SSL34HR7G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SSL34HR7G?

SSL34HR7G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SSL34HR7G 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 SSL34HR7G?

For technical support, including SSL34HR7G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SSL34HR7G requirements.

6.How does Aetrix verify that SSL34HR7G is sourced from the original manufacturer or authorized distributors?

All SSL34HR7G 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 SSL34HR7G meets industry standards.

7.What is the process for return or replacement of SSL34HR7G?

All SSL34HR7G units undergo pre-shipment inspection (PSI). If there is an issue with SSL34HR7G, 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 SSL34HR7G part is unused and in its original packaging.

Return procedure for SSL34HR7G:

1.Submit a request within 90 days.

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

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