SS34L MTG Equivalent & Substitute Parts

Part Overview

The SS34L MTG 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 remain compatible.

Substiute Parts

SS34L MTG

Taiwan Semiconductor CorporationIn Stock: 1203SS34L MTG Datasheet

Current PartRFQ

SS1FL4HM3/H

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SS34L MTG is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Technology classification: Schottky diode
• Voltage rating: 40 V DC reverse maximum
• Package format: DO-219AB (Sub SMA / SMF)
• Mounting configuration: Surface mount
• RoHS3 compliance status
• Moisture sensitivity level: MSL 1

Current Rating Consideration: The SS34L MTG is rated for 3 A average rectified current. Substitute parts must maintain electrical compatibility within the specified voltage and thermal operating range. The SS1FL4HM3/H operates at 1 A, which represents a reduced current capacity. This part is electrically compatible at the 40 V reverse voltage specification and shares identical package geometry, but operates within a lower current envelope.

Thermal Operating Range: The SS34L MTG operates from -55°C to 125°C junction temperature. The substitute part SS1FL4HM3/H extends the upper operating limit to 150°C, providing enhanced thermal margin in high-temperature applications.

Parameter Comparison

Engineering Selection Recommendations

SS34L MTG (Primary Selection) The SS34L MTG 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. Selection of this part is appropriate for designs where the full 3 A current capacity is required within the -55°C to 125°C operating range.

SS1FL4HM3/H (Substitute Selection) The SS1FL4HM3/H is electrically compatible for applications where current requirements do not exceed 1 A. This Vishay part shares identical voltage rating, package geometry, and fast recovery characteristics. The substitute part carries AEC-Q101 automotive qualification and extends the upper operating temperature to 150°C. Reverse leakage current is reduced to 200 µA compared to 500 µA in the main part. Selection of this substitute is appropriate for lower-current applications or where automotive-grade qualification is required.

Both parts maintain RoHS3 compliance and MSL 1 classification, ensuring compatibility with standard surface mount assembly processes.

Frequently Asked Questions (FAQ)

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

A: The SS1FL4HM3/H is electrically compatible at the 40 V reverse voltage specification and shares the DO-219AB package format. However, the substitute part is rated for 1 A average rectified current compared to 3 A for the main part. Direct substitution is appropriate only in applications where the circuit current requirement does not exceed 1 A.

Q: What are the key differences between these two parts?

A: The primary differences are current rating (3 A versus 1 A), reverse leakage current (500 µA versus 200 µA), maximum operating temperature (125°C versus 150°C), and manufacturer (Taiwan Semiconductor Corporation versus Vishay). Both parts share identical voltage rating, package format, and fast recovery characteristics.

Q: Are both parts RoHS3 compliant?

A: Yes, both the SS34L MTG and SS1FL4HM3/H are RoHS3 compliant with MSL 1 (unlimited) moisture sensitivity classification.

Q: Does the SS1FL4HM3/H carry any additional certifications?

A: The SS1FL4HM3/H carries AEC-Q101 automotive qualification, indicating suitability for automotive applications. The SS34L MTG does not list this qualification in the provided specifications.

Q: Are the packages physically identical?

A: Both parts use the DO-219AB package format (Sub SMA / SMF), ensuring identical footprint and mounting compatibility on printed circuit boards.

Q: What is the significance of the reduced reverse leakage current in the SS1FL4HM3/H?

A: The SS1FL4HM3/H exhibits 200 µA reverse leakage at 40 V compared to 500 µA for the SS34L MTG. Lower reverse leakage current reduces power dissipation in reverse bias conditions and may improve circuit performance in sensitive applications.

Q: Can the SS34L MTG be used in place of the SS1FL4HM3/H?

A: The SS34L MTG can be used in applications designed for the SS1FL4HM3/H, as it provides higher current capacity (3 A versus 1 A) and maintains all other electrical specifications. However, this substitution may not be necessary unless additional current margin is required.