S40JR Equivalent & Substitute Parts – Diodes, Rectifiers Reference

Part Overview

The GeneSiC Semiconductor S40JR is a standard reverse polarity rectifier diode rated at 600 V reverse voltage and 40A average rectified current, housed in a DO-203AB, DO-5, stud mount package. It features a maximum forward voltage of 1.1 V at 40 A, standard recovery speed, and is suitable for operating temperatures from -65°C to 190°C. The product status is “Active," and it is RoHS compliant with a moisture sensitivity level of 1 (unlimited).

Identifying equivalent or substitute models ensures design flexibility in the event of sourcing challenges, compliance updates, or supply chain changes.

Key Parameters

Parameter	S40JR Value	Notes
Technology	Standard, Reverse Polarity	Product function/type
Voltage - DC Reverse (Vr) (Max)	600 V	Max allowed reverse voltage
Current - Average Rectified (Io)	40 A	Steady-state current capability
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 40 A	Forward voltage drop
Speed	Standard Recovery >500ns, > 200mA (Io)	Recovery time classification
Current - Reverse Leakage @ Vr	10 µA @ 100 V	Leakage current
Mounting Type	Chassis, Stud Mount	Mechanical configuration
Package / Case	DO-203AB, DO-5, Stud	Physical package standard

Substitute Part Grouping Explanation

Substitute parts are identified strictly using matching electrical and mechanical parameters essential for device functionality and form factor compatibility in the diodes, rectifiers category.
Key parameters for substitution include:

Technology (Standard, Reverse Polarity)
Maximum Reverse Voltage (600 V)
Average Rectified Current (40 A)
Forward Voltage (comparable)
Speed (Standard Recovery)
Mounting Type (Chassis, Stud Mount / Stud Mount)
Package / Case (DO-203AB, DO-5 equivalent)

Only parts matching or exceeding these parameter thresholds and with compatible mounting/case style are included as substitutes.

Parameter Comparison

Parameter	S40JR (GeneSiC Semiconductor)	1N1190AR (Microchip Technology)
Technology	Standard, Reverse Polarity	Standard, Reverse Polarity
Voltage - DC Reverse (Vr) (Max)	600 V	600 V
Current - Average Rectified (Io)	40 A	40 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 40 A	1.19 V @ 90 A
Speed	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	10 µA @ 100 V	10 µA @ 600 V
Mounting Type	Chassis, Stud Mount	Stud Mount
Package / Case	DO-203AB, DO-5, Stud	DO-203AB, DO-5, Stud
Operating Temperature - Junction	-65°C ~ 190°C	-65°C ~ 200°C
RoHS Status	RoHS Compliant	RoHS non-compliant

Engineering Selection Recommendations

The S40JR is active and RoHS compliant, suitable for applications with environmental requirements. The 1N1190AR is also active but not RoHS compliant, which may restrict use in regulated environments. Selection should be based on compliance needs and inventory status in addition to electrical and mechanical compatibility as specified.

Frequently Asked Questions (FAQ)

Q: What are the most important criteria when selecting a substitute for S40JR in the diodes, rectifiers product category?
A: Substitute selection must be based on matching technology, reverse voltage rating, average rectified current, speed, mounting type, and package/case standard.

Q: Can 1N1190AR be used in the same mechanical footprint as S40JR?
A: Both S40JR and 1N1190AR use the DO-203AB, DO-5, Stud mount package/case, ensuring mechanical compatibility in supported designs.

Q: How does RoHS compliance affect substitute selection?
A: S40JR is RoHS compliant; 1N1190AR is RoHS non-compliant. Applications requiring RoHS must use compliant parts only.

Q: Do both S40JR and 1N1190AR have similar recovery speeds and reverse leakage characteristics?
A: Both diodes are classified as standard recovery devices with comparable reverse leakage currents as specified.

Q: Are there differences in forward voltage between S40JR and 1N1190AR?
A: The S40JR specifies 1.1 V @ 40 A and the 1N1190AR 1.19 V @ 90 A. Selection should consider this difference only if strictly required by the design.

Q: Is there a difference in operating temperature ranges?
A: S40JR operates from -65°C to 190°C; 1N1190AR operates from -65°C to 200°C. Both ranges support high-temperature applications within these limits.

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