MBR3045PTG Equivalent & Substitute Parts

Part Overview

The MBR3045PTG is a Schottky diode array manufactured by onsemi, configured as 1 pair common cathode with a maximum reverse voltage of 45 V and average rectified current of 15 A per diode. The device is packaged in TO-218-3 (SOT-93) through-hole configuration and operates across a junction temperature range of -65°C to 175°C.

This part carries an obsolete product status. Locating equivalent or substitute components is necessary to support ongoing system maintenance, repair, and production continuity where the original MBR3045PTG is no longer readily available from primary sources.

Substiute Parts

MBR3045PTG

onsemiIn Stock: 20257MBR3045PTG Datasheet

Current PartRFQ

MBR3045PT-E3/45

Vishay General Semiconductor - Diodes DivisionIn Stock: 1695MBR3045PT-E3/45 Datasheet

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MBR3045PT_T0_00001

Panjit International Inc.In Stock: 2320MBR3045PT_T0_00001 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MBR3045PTG is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Diode configuration (1 pair common cathode)
• Technology (Schottky)
• Maximum reverse voltage (45 V)
• Fast recovery speed (≤ 500ns, > 200mA)
• Through-hole mounting type
• Operating temperature range capability

Allowable Variations:

• Current rating may exceed the original 15 A specification, provided the substitute meets or exceeds this minimum
• Forward voltage characteristics may differ within the Schottky diode technology class
• Reverse leakage current may be lower than the original specification
• Package form factor may differ (TO-247-3, TO-3P-3, SC-65-3) while maintaining through-hole mounting compatibility
• Product status may transition from obsolete to active

The substitute parts listed below satisfy all critical matching parameters and are therefore electrically and mechanically compatible with the MBR3045PTG in applications where the original part is no longer available.

Parameter Comparison

Engineering Selection Recommendations

MBR3045PT-E3/45 (Vishay General Semiconductor - Diodes Division)

This substitute is manufactured by Vishay and carries active product status. The part meets all critical electrical parameters with doubled current capacity (30 A versus 15 A). The maximum junction temperature is 150°C, which is 25°C lower than the original specification. This part is RoHS3 compliant and carries REACH unaffected status. The TO-3P-3 and SC-65-3 package forms provide through-hole mounting compatibility with potential thermal performance advantages due to larger package geometry.

MBR3045PT_T0_00001 (Panjit International Inc.)

This substitute is manufactured by Panjit and carries active product status. The part meets all critical electrical parameters with doubled current capacity (30 A versus 15 A). The maximum junction temperature matches the original specification at 175°C. Reverse leakage current is significantly lower at 100 µA compared to 1 mA. This part is RoHS3 compliant and carries REACH unaffected status. The TO-247-3 package provides through-hole mounting compatibility.

Both substitutes are suitable for applications requiring the MBR3045PTG electrical and mechanical characteristics. Selection between them depends on specific thermal requirements, available board space for the package form factor, and supply chain considerations.

Frequently Asked Questions (FAQ)

Q: Can the MBR3045PT-E3/45 or MBR3045PT_T0_00001 be used as direct replacements for the MBR3045PTG?

A: Both parts are electrically compatible substitutes. They maintain the same 45 V reverse voltage rating, 1 pair common cathode configuration, Schottky technology, and fast recovery speed. Both are through-hole mounted devices. The primary differences are increased current capacity (30 A versus 15 A) and package form factor. Mechanical fit on the PCB must be verified based on the specific board layout and available space for the TO-3P-3, SC-65-3, or TO-247-3 packages.

Q: What is the significance of the higher current rating on the substitute parts?

A: The substitute parts are rated for 30 A average rectified current per diode, compared to 15 A on the original MBR3045PTG. A higher current rating does not create incompatibility; it indicates the substitute can safely handle greater current loads. In applications where the circuit draws 15 A or less, the substitute operates within its safe operating region with additional margin.

Q: How do the operating temperature ranges differ?

A: The MBR3045PTG and MBR3045PT_T0_00001 both operate from -65°C to 175°C junction temperature. The MBR3045PT-E3/45 operates from -65°C to 150°C. For applications requiring operation above 150°C, the Panjit part maintains full specification compliance. For applications operating at or below 150°C, both substitutes are suitable.

Q: What are the package differences, and do they affect PCB compatibility?

A: The original MBR3045PTG uses TO-218-3 (SOT-93) packaging. The MBR3045PT-E3/45 uses TO-3P-3 or SC-65-3 packaging, while the MBR3045PT_T0_00001 uses TO-247-3 packaging. All three are through-hole mounted devices. Physical dimensions and pin spacing differ between packages. PCB layout modifications may be required to accommodate the substitute package form factor. Mechanical fit verification is necessary before component selection.

Q: What does reverse leakage current mean, and why does it differ between parts?

A: Reverse leakage current is the small current that flows through a diode when reverse bias is applied. The MBR3045PTG and MBR3045PT-E3/45 specify 1 mA at 45 V, while the MBR3045PT_T0_00001 specifies 100 µA at 45 V. Lower leakage current indicates better diode quality and lower power dissipation in reverse bias conditions. Both values are acceptable for Schottky diode technology; the lower value on the Panjit part represents an improvement.

Q: Are there compliance or certification differences between the original and substitute parts?

A: The MBR3045PTG carries REACH unaffected status and EAR99 ECCN classification. Both substitute parts are RoHS3 compliant, carry REACH unaffected status, and share the same EAR99 ECCN classification. The Panjit part does not specify moisture sensitivity level, while the original and Vishay parts specify MSL 1 (unlimited). All parts meet the same regulatory framework for component selection.