MBR4045PTG Equivalent & Substitute Parts

Part Overview

The MBR4045PTG 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 20 A per diode. This component is packaged in TO-218-3 (SOT-93) through-hole configuration and is classified as obsolete product status.

Due to its obsolete status, sourcing the MBR4045PTG from original manufacturing channels is no longer supported. Equivalent substitute parts with compatible electrical and mechanical specifications are available to maintain circuit functionality and performance in existing designs or new production requirements.

Substiute Parts

MBR4045PTG

onsemiIn Stock: 1125MBR4045PTG Datasheet

Current PartRFQ

MBR4050PT-E3/45

Vishay General Semiconductor - Diodes DivisionIn Stock: 1071MBR4050PT-E3/45 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MBR4045PTG is determined by the following critical parameters:

Electrical Compatibility Criteria:

• Diode configuration must be 1 pair common cathode
• Technology must be Schottky
• Maximum reverse voltage (Vr) must be equal to or greater than 45 V
• Average rectified current (Io) per diode must be equal to or greater than 20 A
• Forward voltage (Vf) characteristics must be compatible at rated current
• Recovery speed must be fast recovery ≤ 500ns, > 200mA (Io)
• Reverse leakage current must not exceed specified limits

Mechanical Compatibility Criteria:

• Mounting type must be through-hole
• Package footprint must be compatible with TO-218-3 or equivalent through-hole configurations
• Moisture sensitivity level must be 1 (Unlimited) or equivalent

The MBR4050PT-E3/45 meets these substitution criteria with equal or superior electrical ratings and compatible through-hole packaging.

Parameter Comparison

Engineering Selection Recommendations

MBR4050PT-E3/45 as Primary Substitute:

The MBR4050PT-E3/45 is the designated substitute for the obsolete MBR4045PTG based on the following factors:

1. Product Status: The MBR4050PT-E3/45 maintains active product status with current manufacturing support, ensuring long-term availability and supply chain continuity.

2. Electrical Superiority: The substitute part exceeds the original specifications with 50 V reverse voltage rating (versus 45 V) and 40 A average rectified current (versus 20 A), providing design margin for circuit protection and thermal performance.

3. Compliance: The MBR4050PT-E3/45 is ROHS3 compliant, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.

4. Functional Equivalence: Both parts share identical Schottky technology, 1 pair common cathode configuration, fast recovery characteristics, and through-hole mounting type, ensuring functional compatibility in existing circuit designs.

5. Package Compatibility: Both components utilize through-hole TO-3P-3 / SC-65-3 package configurations with compatible pin assignments and mechanical footprints suitable for PCB integration.

Temperature Consideration: The substitute part operates across -65°C to 150°C junction temperature range, which is 25°C narrower at the upper limit compared to the original part's -65°C to 175°C range. Applications requiring sustained operation above 150°C require thermal analysis to confirm suitability.

Frequently Asked Questions (FAQ)

Q: Can the MBR4050PT-E3/45 directly replace the MBR4045PTG in existing designs?

A: Yes. The MBR4050PT-E3/45 is electrically and mechanically compatible with the MBR4045PTG. The substitute part meets or exceeds all critical electrical parameters including reverse voltage, rectified current, forward voltage, and recovery speed. Both components use identical diode configuration (1 pair common cathode) and through-hole mounting technology.

Q: What are the key differences between these two parts?

A: The primary differences are: (1) manufacturer (onsemi versus Vishay), (2) product status (obsolete versus active), (3) reverse voltage rating (45 V versus 50 V), (4) rectified current rating (20 A versus 40 A per diode), (5) maximum junction temperature (175°C versus 150°C), and (6) regulatory compliance (MBR4050PT-E3/45 is ROHS3 compliant).

Q: Are there package compatibility concerns when substituting?

A: Both parts use through-hole packaging with compatible pin configurations. The MBR4045PTG uses TO-218-3 (SOT-93) designation, while the MBR4050PT-E3/45 uses TO-3P-3 / SC-65-3 designation. These represent equivalent through-hole package families with compatible mechanical footprints and electrical pin assignments suitable for direct PCB substitution.

Q: Does the higher current rating of the substitute part affect circuit operation?

A: No. The higher current rating (40 A versus 20 A) of the MBR4050PT-E3/45 provides additional design margin and thermal capacity. The substitute part will operate safely in circuits designed for the original 20 A specification, with improved thermal performance and reduced junction temperature rise.

Q: What is the impact of the narrower temperature range on the substitute part?

A: The MBR4050PT-E3/45 operates across -65°C to 150°C, compared to the original part's -65°C to 175°C range. For applications operating below 150°C junction temperature, this difference has no impact. Applications requiring sustained operation above 150°C require thermal analysis to confirm the substitute part remains within acceptable operating limits.

Q: Is the MBR4050PT-E3/45 readily available?

A: Yes. The MBR4050PT-E3/45 maintains active product status with current manufacturing support. The original MBR4045PTG is classified as obsolete and is no longer actively manufactured, making the substitute the recommended choice for new designs and ongoing production requirements.

Q: Are there compliance or regulatory differences between these parts?

A: The MBR4050PT-E3/45 is ROHS3 compliant, meeting current environmental and regulatory requirements. The original MBR4045PTG compliance status is not specified in available documentation. For applications subject to ROHS or other environmental regulations, the substitute part provides documented compliance assurance.