R3780 Equivalent & Substitute Parts Reference

Part Overview

The R3780, manufactured by Microchip Technology, is a general-purpose diode in the Diodes, Rectifiers category. It features a reverse voltage rating of 800 V, an average rectified current of 85A, and is housed in a DO-203AB (DO-5) stud-mount package. The product is currently active and classified as RoHS non-compliant. Sourcing substitute models is necessary to address requirements related to product compliance, supply availability, or application-specific needs.

Key Parameters

Parameter	R3780 Value
Voltage - DC Reverse (Vr) (Max)	800 V
Current - Average Rectified (Io)	85A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 200 A
Speed	Standard Recovery >500ns, > 200mA (Io)
Mounting Type	Stud Mount
Package / Case	DO-203AB, DO-5, Stud
Supplier Device Package	DO-5 (DO-203AB)
Operating Temperature - Junction	-65°C ~ 200°C
RoHS Status	RoHS non-compliant
REACH Status	REACH Unaffected
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the R3780 are selected strictly based on parameters that ensure electrical and mechanical compatibility. The primary criteria include voltage rating, current rating, forward voltage, speed classification, package type, mounting method, and environmental compliance. Only parts matching or closely aligning with these parameters in the Diodes, Rectifiers category are considered for substitution.

Key substitution parameters:

Voltage - DC Reverse (Vr) (Max)
Current - Average Rectified (Io)
Voltage - Forward (Vf) (Max) @ If
Speed
Mounting Type
Package / Case
Operating Temperature - Junction
RoHS and REACH Status
Product Status

Parameter Comparison

Parameter	R3780 (Microchip)	VS-70HF80 (Vishay)	VS-88HF80 (Vishay)
Voltage - DC Reverse (Vr) (Max)	800 V	800 V	800 V
Current - Average Rectified (Io)	85A	70A	85A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 200 A	1.35 V @ 220 A	1.2 V @ 267 A
Speed	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)
Mounting Type	Stud Mount	Chassis, Stud Mount	Chassis, Stud Mount
Package / Case	DO-203AB, DO-5, Stud	DO-203AB, DO-5, Stud	DO-203AB, DO-5, Stud
Supplier Device Package	DO-5 (DO-203AB)	DO-203AB (DO-5)	DO-203AB (DO-5)
Operating Temperature - Junction	-65°C ~ 200°C	-65°C ~ 150°C	-65°C ~ 180°C
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active

Engineering Selection Recommendations

All listed substitute parts are active and REACH unaffected. VS-70HF80 and VS-88HF80 are ROHS3 compliant, which may be required for certain applications, whereas R3780 is RoHS non-compliant. RoHS status, as well as product status, should be considered in environments with strict environmental or regulatory requirements.

Frequently Asked Questions (FAQ)

Q: What are the most critical parameters when selecting a substitute for R3780?
A: Voltage rating, current rating, forward voltage, speed, mounting type, package, and environmental compliance (RoHS, REACH) are critical for substitution.

Q: Are the VS-70HF80 and VS-88HF80 foot-print compatible with R3780?
A: All parts use the DO-203AB (DO-5) stud-mount package, providing mechanical and mounting compatibility.

Q: How do environmental compliance requirements affect part selection?
A: If RoHS compliance is required, VS-70HF80 and VS-88HF80 are suitable substitutes, as they are ROHS3 compliant.

Q: Are there differences in operating temperature between the parts?
A: Yes. VS-70HF80 and VS-88HF80 have lower maximum junction temperatures (-65°C ~ 150°C and -65°C ~ 180°C, respectively) compared to R3780 (-65°C ~ 200°C).

Q: Is it necessary to match all listed parameters when selecting a substitute?
A: Substitute selection should be based strictly on matching or exceeding the listed key electrical, mechanical, and compliance parameters. No extrapolation or assumption is allowed.

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