Equivalent & Substitute Parts Reference for FST8340M

Part Overview

The FST8340M from GeneSiC Semiconductor is a Schottky diode array with a 1 pair common cathode configuration, rated for 40 V reverse voltage and 80A (DC) average current per diode. It features a fast recovery time and is intended for chassis mount in power rectification applications. This product is currently designated as obsolete. Identifying alternative or substitute models is required to maintain design continuity and serviceability in active and future projects.

Substiute Parts

FST8340M

GeneSiC SemiconductorIn Stock: 1063FST8340M Datasheet

Current PartRFQ

84CNQ040S2

SMC Diode SolutionsIn Stock: 100384CNQ040S2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts are selected strictly based on matching or comparable electrical, mechanical, and mounting characteristics. Key allowed substitution parameters for this category include:

• Diode configuration: 1 Pair Common Cathode
• Schottky technology
• Maximum DC reverse voltage (Vr): 40 V
• Average rectified current per diode: 80A
• Package type: Chassis Mount
• Electrical performance: Fast recovery, similar reverse leakage, and comparable forward voltage
• Mechanical form factor: Comparable mounting and case style

The only included substitute parts meet all relevant requirements as specified by these parameters.

Parameter Comparison

Engineering Selection Recommendations

Selection is determined by the obsolete status of the FST8340M, making substitute sourcing necessary. The substitute part 84CNQ040S2 is classified as active and ROHS3 compliant, with similar electrical performance and the same moisture sensitivity level (MSL 1). Both parts are categorized under ECCN EAR99 and HTSUS 8541.10.0080. RoHS and REACH status, as provided, apply to the substitute part only.

Frequently Asked Questions (FAQ)

Q1: Which parameters are critical when selecting a substitute for FST8340M?
A1: Key parameters include diode configuration (1 Pair Common Cathode), Schottky technology, maximum DC reverse voltage (40 V), average rectified current (80A), mounting type (chassis mount), and similar voltage and speed ratings.

Q2: Is package compatibility required for substitution?
A2: For mechanical interchangeability, both package type and mounting method (chassis mount) must be considered. The substitute, 84CNQ040S2, is specified in PRM2 package against D61-3M for the original part.

Q3: What is the moisture sensitivity for both parts?
A3: Both FST8340M and 84CNQ040S2 are designated with Moisture Sensitivity Level 1 (Unlimited).

Q4: Are there differences in compliance or certification?
A4: The substitute part 84CNQ040S2 is ROHS3 compliant and REACH affected, whereas compliance data for the original is not provided.

Q5: Why is substitution necessary for FST8340M?
A5: Substitution is required due to the product's obsolete status, as continued sourcing for new designs and ongoing support is not feasible.

Q6: How does the forward voltage and reverse leakage compare?
A6: 84CNQ040S2 has a forward voltage of 620 mV @ 80 A and reverse leakage of 5 mA @ 40 V, while FST8340M is specified at 650 mV @ 80 A and 1.5 mA @ 20 V. Differences in test conditions should be verified in detailed selection.