SS34LHRVG Equivalent & Substitute Parts

Part Overview

The SS34LHRVG is an automotive-grade Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation. This surface mount component operates at 40 V DC reverse voltage with a 3 A average rectified current rating. The device is qualified to AEC-Q101 automotive standards and is actively produced. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications requiring Schottky diode functionality within the specified electrical and mechanical parameters.

Substiute Parts

SS34LHRVG

Taiwan Semiconductor CorporationIn Stock: 1177SS34LHRVG Datasheet

Current PartRFQ

SS1FL4HM3/H

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SS34LHRVG is determined by electrical and mechanical compatibility within the following parameters:

Voltage Rating: The substitute part must maintain a DC reverse voltage (Vr) rating of 40 V or greater to ensure safe operation in the application circuit.

Current Rating: The substitute part current rating must equal or exceed the 3 A average rectified current (Io) requirement. Parts with lower current ratings do not qualify as direct substitutes.

Package and Mounting: Both the main part and substitute must use the DO-219AB package with surface mount technology to ensure mechanical and thermal compatibility on the printed circuit board.

Technology and Speed: Schottky diode technology with fast recovery characteristics (≤ 500 ns, > 200 mA) is required to maintain switching performance.

Automotive Qualification: AEC-Q101 qualification is mandatory for automotive-grade applications.

Environmental Compliance: RoHS3 compliance and REACH unaffected status must be maintained.

The SS1FL4HM3/H does not qualify as a direct substitute for the SS34LHRVG due to a current rating of 1 A, which is below the required 3 A specification. This part is listed for reference only and represents a lower-current alternative within the same voltage and package class.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitution Status: No direct substitute is available for the SS34LHRVG within the provided part list. The SS1FL4HM3/H shares identical voltage rating, package, and automotive qualification but operates at a maximum current of 1 A, which is insufficient for applications requiring the full 3 A rating of the main part.

Application Compatibility: Selection of any replacement part must be based on the actual current demand of the circuit. If the application circuit operates at or below 1 A, the SS1FL4HM3/H may be considered as an alternative within the same voltage and package class. If the application requires 3 A operation, the SS34LHRVG remains the specified component.

Compliance Verification: Both parts maintain AEC-Q101 automotive qualification, ROHS3 compliance, and REACH unaffected status, ensuring regulatory and environmental requirements are met for automotive applications.

Thermal Considerations: The SS1FL4HM3/H operates over a wider junction temperature range (-55°C ~ 150°C) compared to the SS34LHRVG (-55°C ~ 125°C). This difference does not affect substitution eligibility but may be relevant for high-temperature application environments.

Frequently Asked Questions (FAQ)

Q: Can the SS1FL4HM3/H replace the SS34LHRVG in my circuit?

A: The SS1FL4HM3/H is not a direct substitute. It is rated for 1 A maximum current, while the SS34LHRVG is rated for 3 A. Substitution is only valid if your circuit operates at 1 A or below. If your application requires 3 A operation, the SS34LHRVG must be used.

Q: Are both parts in the same package?

A: Yes. Both the SS34LHRVG and SS1FL4HM3/H use the DO-219AB surface mount package, ensuring identical mechanical and thermal footprint compatibility on the printed circuit board.

Q: Do both parts meet automotive standards?

A: Yes. Both parts are automotive-grade components qualified to AEC-Q101 and are ROHS3 compliant, meeting automotive industry requirements.

Q: What is the key difference between these parts?

A: The primary difference is the average rectified current rating. The SS34LHRVG is rated for 3 A, while the SS1FL4HM3/H is rated for 1 A. Both maintain the same 40 V reverse voltage rating and fast recovery Schottky technology.

Q: Are there any temperature range differences?

A: Yes. The SS1FL4HM3/H operates from -55°C to 150°C junction temperature, while the SS34LHRVG operates from -55°C to 125°C. Both ranges are suitable for standard automotive applications.

Q: What is the reverse leakage current difference?

A: The SS34LHRVG has a reverse leakage current of 500 µA at 40 V, while the SS1FL4HM3/H has 200 µA at 40 V. The lower leakage in the SS1FL4HM3/H may provide marginal benefits in low-power standby applications.