Equivalent & Substitute Parts for S400Q

Part Overview

The GeneSiC Semiconductor S400Q is a general-purpose diode in the Diodes, Rectifiers category. It offers a maximum DC reverse voltage of 1200 V and an average rectified current of 400A, housed in a DO-205AB (DO-9) chassis, stud mount package. This device is RoHS compliant and features standard recovery characteristics. The product is listed as active with an available inventory. Identifying alternatives or substitutes is necessary for applications where supply continuity, risk mitigation, or multi-vendor sourcing is required within the allowed electrical and mechanical parameters specified for this part category.

Key Parameters

Parameter	Main Part (S400Q)
Manufacturer	GeneSiC Semiconductor
Category	Diodes, Rectifiers
Voltage - DC Reverse (Vr) (Max)	1200 V
Current - Average Rectified (Io)	400A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 400 A
Speed	Standard Recovery >500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	10 µA @ 50 V
Mounting Type	Chassis, Stud Mount
Package / Case	DO-205AB, DO-9, Stud
Operating Temperature - Junction	-60°C ~ 200°C
RoHS Status	RoHS Compliant
MSL	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts are considered based strictly on alignment with the following allowed electrical and mechanical parameters:

Voltage - DC Reverse (Vr) (Max)
Current - Average Rectified (Io)
Voltage - Forward (Vf) (Max) @ If
Speed (Recovery Time and Io)
Current - Reverse Leakage @ Vr
Mounting Type
Package / Case
Operating Temperature - Junction
RoHS and other compliance statuses Parts included as substitutes must fully conform to these criteria to be considered functionally equivalent within the specified diode, rectifier product category.

Parameter Comparison

Parameter	S400Q (GeneSiC Semiconductor)	VS-240U120D (Vishay General Semiconductor)
Category	Diodes, Rectifiers	Diodes, Rectifiers
Voltage - DC Reverse (Vr) (Max)	1200 V	1200 V
Current - Average Rectified (Io)	400A	320A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 400 A	1.33 V @ 750 A
Speed	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	10 µA @ 50 V	15 mA @ 1200 V
Mounting Type	Chassis, Stud Mount	Stud Mount
Package / Case	DO-205AB, DO-9, Stud	DO-205AB, DO-9, Stud
Operating Temperature - Junction	-60°C ~ 200°C	-40°C ~ 180°C
RoHS Status	RoHS Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active

Engineering Selection Recommendations

Both S400Q and VS-240U120D are listed as active and available with RoHS compliance and MSL 1 (Unlimited) status. These attributes ensure suitability for supply continuity and global trade compliance within their product category. Selection for substitution must remain within the strict scope of the provided parameters.

Frequently Asked Questions (FAQ)

What are the primary criteria for substituting rectifier diodes in this category?
Substitute selection requires strict matching of voltage ratings, current ratings, forward voltage drop, recovery characteristics, package type, mounting method, compliance standards, and operational temperature ranges as specified.

Can VS-240U120D be used as a direct replacement for S400Q in all applications?
The VS-240U120D matches the package (DO-205AB, DO-9, Stud), voltage rating, and compliance level, but differs in average current and some parameter values. Compatibility depends solely on meeting application requirements within the strict parameters provided.

Is the mounting method consistent across these alternatives?
Both S400Q and VS-240U120D use a stud mount (DO-205AB, DO-9) package.

Do both models meet RoHS compliance?
Yes, both S400Q and VS-240U120D are RoHS compliant.

Should I consider environmental ratings or certifications?
All necessary compliance information, including RoHS and MSL status, is outlined under the provided parameters and should be adhered to for selection.

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