SS34LHRUG Equivalent & Substitute Parts

Part Overview

The SS34LHRUG is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 40 V DC reverse voltage and 3 A average rectified current in a Sub SMA surface mount package. This component is classified as Active product status with AEC-Q101 automotive qualification and ROHS3 compliance. Equivalent and substitute parts are identified based on matching electrical specifications, package compatibility, and automotive-grade certifications to support component procurement flexibility and supply chain continuity.

Substiute Parts

SS34LHRUG

Taiwan Semiconductor CorporationIn Stock: 901SS34LHRUG Datasheet

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SL04-HE3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 17350SL04-HE3-08 Datasheet

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SS1FL4HM3/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 33227SS1FL4HM3/H Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SS34LHRUG are identified based on the following critical parameters that determine functional equivalence:

Matching Criteria:

• Voltage - DC Reverse (Vr) (Max): 40 V
• Package / Case: DO-219AB (Sub SMA / SMF variants)
• Technology: Schottky
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Grade: Automotive
• Qualification: AEC-Q101
• RoHS Status: ROHS3 Compliant
• Mounting Type: Surface Mount

Current Rating Consideration: The SS34LHRUG is rated for 3 A average rectified current. Substitute parts with lower current ratings (1 A to 1.1 A) are listed as alternatives for applications where the full 3 A capacity is not required. These substitutes maintain identical voltage ratings, package compatibility, and automotive certifications.

Parameter Comparison

Engineering Selection Recommendations

SS34LHRUG (Primary Component) The SS34LHRUG is the primary selection for applications requiring 3 A average rectified current at 40 V reverse voltage with automotive-grade reliability. This component maintains Active product status with full AEC-Q101 qualification and ROHS3 compliance, suitable for automotive rectification circuits.

SL04-HE3-08 (Vishay eSMP® Series) The SL04-HE3-08 is a substitute for applications where current requirements do not exceed 1.1 A. This part shares identical voltage ratings, package compatibility (DO-219AB), and automotive certifications. The SL04-HE3-08 exhibits lower reverse leakage current (20 µA vs. 500 µA) and higher maximum junction temperature (175°C), making it suitable for thermally demanding environments where current capacity is not a limiting factor.

SS1FL4HM3/H (Vishay eSMP® Series) The SS1FL4HM3/H is a substitute for applications where current requirements do not exceed 1 A. This part maintains identical voltage ratings, package compatibility (DO-219AB), and automotive certifications. The SS1FL4HM3/H provides an extended operating temperature range (-55°C ~ 150°C) and moderate reverse leakage current (200 µA), offering thermal flexibility for standard automotive applications.

All substitute parts maintain AEC-Q101 automotive qualification, ROHS3 compliance, and fast recovery Schottky technology, ensuring functional compatibility within specified current and voltage parameters.

Frequently Asked Questions (FAQ)

Q: Can the SL04-HE3-08 or SS1FL4HM3/H be used as direct replacements for the SS34LHRUG?

A: These parts are substitutes only for applications where the average rectified current does not exceed 1.1 A (SL04-HE3-08) or 1 A (SS1FL4HM3/H). The SS34LHRUG is rated for 3 A, which is the maximum current these substitutes can handle. Direct replacement is not suitable for circuits requiring the full 3 A capacity.

Q: Are the package dimensions identical between SS34LHRUG and the substitute parts?

A: All parts use the DO-219AB package family. The SS34LHRUG is specified as Sub SMA, while the substitutes are specified as DO-219AB (SMF). Both designations refer to the same physical package footprint suitable for surface mount assembly.

Q: What is the difference in reverse leakage current between these parts?

A: The SS34LHRUG exhibits 500 µA reverse leakage at 40 V, the SL04-HE3-08 exhibits 20 µA, and the SS1FL4HM3/H exhibits 200 µA. Lower reverse leakage current reduces standby power dissipation and is beneficial in low-power or battery-operated applications.

Q: Do all parts meet automotive qualification requirements?

A: Yes. The SS34LHRUG, SL04-HE3-08, and SS1FL4HM3/H all carry AEC-Q101 automotive qualification and Automotive grade classification, meeting automotive reliability standards.

Q: What are the operating temperature differences?

A: The SS34LHRUG operates from -55°C to 125°C. The SL04-HE3-08 has a maximum junction temperature of 175°C (no minimum specified). The SS1FL4HM3/H operates from -55°C to 150°C. Selection depends on the thermal environment of the application.

Q: Are all parts ROHS3 compliant?

A: Yes. The SS34LHRUG, SL04-HE3-08, and SS1FL4HM3/H are all ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements.

Q: What is the forward voltage difference at rated current?

A: At their respective rated currents, the SS34LHRUG exhibits 500 mV @ 3 A, the SL04-HE3-08 exhibits 540 mV @ 1.1 A, and the SS1FL4HM3/H exhibits 500 mV @ 1 A. Forward voltage characteristics are dependent on current level and should be evaluated for specific circuit requirements.