Equivalent & Substitute Parts for MBR3545

Part Overview

The MBR3545, manufactured by GeneSiC Semiconductor, is a Schottky diode in the "Diodes, Rectifiers" product category. This rectifier features a maximum DC reverse voltage of 45 V, an average rectified current of 35A, and is provided in a DO-203AA (DO-4, Stud) chassis/stud mount package. The part is listed as active and RoHS compliant. In applications where the MBR3545 is unavailable, finding alternative models with matching electrical and mechanical specifications is essential to ensure functional interchangeability.

Key Parameters

Parameter	MBR3545 Value
Manufacturer	GeneSiC Semiconductor
Category	Diodes, Rectifiers
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	45 V
Current - Average Rectified (Io)	35A
Voltage - Forward (Vf) (Max) @ If	680 mV @ 35 A
Speed	Fast Recovery =< 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	1.5 mA @ 20 V
Mounting Type	Chassis, Stud Mount
Package / Case	DO-203AA, DO-4, Stud
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution is determined strictly by matching the following key parameters for the Schottky diode in this product category: voltage - DC reverse (Vr) (Max), current - average rectified (Io), voltage - forward (Vf) (Max), speed, current - reverse leakage @ Vr, mounting type, package/case, and operating temperature - junction. Only parts that align closely on these parameters are included as valid substitutes.

Parameter Comparison

Parameter	MBR3545	1N6391
Manufacturer	GeneSiC Semiconductor	Microchip Technology
Category	Diodes, Rectifiers	Diodes, Rectifiers
Technology	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	45 V	45 V
Current - Average Rectified (Io)	35A	25A
Voltage - Forward (Vf) (Max) @ If	680 mV @ 35 A	500 mV @ 5 A
Speed	Fast Recovery =< 500ns, > 200mA (Io)	Fast Recovery =< 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	1.5 mA @ 20 V	1.5 mA @ 45 V
Mounting Type	Chassis, Stud Mount	Stud Mount
Package / Case	DO-203AA, DO-4, Stud	DO-203AA, DO-4, Stud
Operating Temperature - Junction	-55°C ~ 150°C	-55°C ~ 175°C
RoHS Status	RoHS Compliant	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The MBR3545 is active and RoHS compliant. The listed substitute 1N6391 is also active but is RoHS non-compliant. The moisture sensitivity level for both diodes is rated as 1 (unlimited), and both are suitable for stud mount installations in a DO-203AA (DO-4, Stud) package. Selection may be dictated by RoHS compliance requirements for specific applications.

Frequently Asked Questions (FAQ)

Q: What key electrical parameters must match for selecting substitute Schottky rectifiers like MBR3545 and 1N6391?
A: The primary parameters for substitution are: voltage - DC reverse (Vr) (Max), current - average rectified (Io), voltage - forward (Vf) (Max) at the relevant forward current, speed, current - reverse leakage at the specified reverse voltage, mounting type, and package/case.

Q: Are MBR3545 and 1N6391 mechanically compatible?
A: Both MBR3545 and 1N6391 use the DO-203AA (DO-4, Stud) package and are suited for chassis, stud mount installations.

Q: Is RoHS compliance a differentiating factor between MBR3545 and 1N6391?
A: Yes, MBR3545 is RoHS compliant, while 1N6391 is RoHS non-compliant. This affects selection for applications requiring RoHS certification.

Q: Can average rectified current differences influence direct substitution?
A: The MBR3545 is rated at 35A average rectified current, while the 1N6391 is rated at 25A. Selection should match the application’s required current rating.

Q: Does the moisture sensitivity level differ between these substitute diodes?
A: Both MBR3545 and 1N6391 have a moisture sensitivity level of 1 (unlimited), indicating no special handling requirements regarding moisture sensitivity.

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