SS34L RTG Equivalent & Substitute Parts

Part Overview

The SS34L RTG is an active Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, designed for surface mount applications in the Sub SMA package format. This component operates at a maximum reverse voltage of 40 V with an average rectified current rating of 3 A and exhibits fast recovery characteristics suitable for high-frequency switching applications. The part is RoHS3 compliant and carries unlimited moisture sensitivity classification.

Equivalent and substitute parts are identified to provide design flexibility, accommodate supply chain variations, and support component standardization across manufacturing environments where electrical and mechanical parameters align with application requirements.

Substiute Parts

SS34L RTG

Taiwan Semiconductor CorporationIn Stock: 799SS34L RTG Datasheet

Current PartRFQ

SS1FL4HM3/H

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

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SS34L RTG is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Voltage rating: 40 V DC reverse maximum
• Package format: DO-219AB surface mount
• Technology classification: Schottky rectifier diode
• Mounting type: Surface mount
• RoHS3 compliance status
• Moisture sensitivity level: MSL 1

Current Rating Consideration: The SS34L RTG is rated for 3 A average rectified current. Substitute parts must maintain electrical compatibility within the application circuit. The SS1FL4HM3/H operates at 1 A, which represents a reduced current capacity. This part is suitable for applications where the circuit design accommodates lower current requirements or where the substitute operates within a derated condition relative to the main part specification.

Forward Voltage Compatibility: Both parts specify 500 mV maximum forward voltage at their respective rated currents, ensuring consistent voltage drop characteristics within the operating range of each component.

Parameter Comparison

Engineering Selection Recommendations

SS34L RTG (Primary Selection) The SS34L RTG is the specified component for applications requiring 3 A average rectified current at 40 V reverse voltage. This part maintains active product status with full RoHS3 compliance and unlimited moisture sensitivity classification, supporting standard manufacturing and storage protocols.

SS1FL4HM3/H (Substitute Selection) The SS1FL4HM3/H is suitable as a substitute where circuit design accommodates 1 A average rectified current operation. This Vishay component shares identical voltage ratings, package format, and fast recovery speed characteristics. The substitute offers an extended operating temperature range (-55°C to 150°C versus -55°C to 125°C) and lower reverse leakage current (200 µA versus 500 µA at 40 V). Both parts maintain active product status, RoHS3 compliance, and AEC-Q101 automotive qualification for the substitute part. Selection between these components depends on application current requirements and thermal operating conditions.

Frequently Asked Questions (FAQ)

Q: Can the SS1FL4HM3/H directly replace the SS34L RTG in all applications?

A: Direct replacement is limited by current rating. The SS1FL4HM3/H operates at 1 A average rectified current, while the SS34L RTG is rated for 3 A. The substitute is suitable only in applications where circuit current requirements do not exceed 1 A or where the design accommodates derated operation.

Q: Are the package formats identical between these parts?

A: Yes. Both the SS34L RTG and SS1FL4HM3/H use the DO-219AB surface mount package format, ensuring mechanical and footprint compatibility on printed circuit boards.

Q: What is the significance of the reverse leakage current difference?

A: The SS1FL4HM3/H exhibits lower reverse leakage current (200 µA at 40 V) compared to the SS34L RTG (500 µA at 40 V). Lower leakage current reduces power dissipation in reverse bias conditions and may improve circuit efficiency in applications sensitive to standby power consumption.

Q: Does the extended temperature range of the SS1FL4HM3/H affect substitution suitability?

A: The SS1FL4HM3/H operates to 150°C junction temperature, exceeding the SS34L RTG specification of 125°C. This extended range provides additional thermal margin in high-temperature environments but does not restrict substitution in applications operating within the SS34L RTG temperature limits.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the SS34L RTG and SS1FL4HM3/H are RoHS3 compliant with MSL 1 (unlimited) moisture sensitivity classification, supporting standard manufacturing and storage without special handling requirements.

Q: What is the significance of AEC-Q101 qualification for the substitute part?

A: The SS1FL4HM3/H carries AEC-Q101 automotive qualification, indicating compliance with automotive industry reliability and quality standards. The SS34L RTG does not list this qualification in the provided specifications. Selection should consider whether automotive-grade qualification is required for the application.