MBR1045H Schottky Diode Equivalent & Substitute Parts

Part Overview

The MBR1045H is a 45V, 10A Schottky rectifier diode manufactured by onsemi in TO-220-2 through-hole packaging. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and production continuity. The MBR1045H belongs to the SWITCHMODE™ series and is designed for fast recovery applications with reverse recovery time ≤ 500ns at currents > 200mA. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating packaging variations.

Substiute Parts

MBR1045H

onsemiIn Stock: 897MBR1045H Datasheet

Current PartRFQ

MBR1045G

onsemiIn Stock: 50266MBR1045G Datasheet

DirectRFQ

MBR1045

Taiwan Semiconductor CorporationIn Stock: 4256MBR1045 Datasheet

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MBR1045-E3/45

Vishay General Semiconductor - Diodes DivisionIn Stock: 2455MBR1045-E3/45 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MBR1045H is determined by strict equivalence across the following critical parameters:

Mandatory Matching Criteria:

• Voltage - DC Reverse (Vr) Maximum: 45 V
• Current - Average Rectified (Io): 10 A
• Technology: Schottky
• Mounting Type: Through Hole
• Package / Case: TO-220-2
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: 100 µA @ 45 V

Acceptable Variations:

• Forward voltage (Vf) may vary within the Schottky diode operating range
• Operating temperature range may differ provided minimum junction temperature does not exceed -65°C and maximum does not fall below 150°C
• Packaging format (Tube vs. unspecified) does not affect electrical compatibility
• Product status transition from Obsolete to Active is acceptable for substitution purposes

Three substitute parts meet these criteria with full electrical and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: MBR1045G (onsemi)

MBR1045G is the direct equivalent from the original manufacturer. It maintains identical electrical specifications to MBR1045H, including forward voltage characteristics and operating temperature range (-65 to 175°C). Product status is Active with 50,200 units in stock. This part is recommended as the first choice for direct replacement in existing designs and new production.

Secondary Substitute: MBR1045-E3/45 (Vishay)

MBR1045-E3/45 meets all mandatory electrical and mechanical criteria. Forward voltage is lower (570 mV @ 10 A) compared to MBR1045H (840 mV @ 20 A), resulting in reduced power dissipation. Operating temperature range is -65 to 150°C, which covers the primary operating window. Product status is Active with 2,350 units in stock. This part is suitable for applications where lower forward voltage characteristics are beneficial.

Tertiary Substitute: MBR1045 (Taiwan Semiconductor Corporation)

MBR1045 from Taiwan Semiconductor Corporation meets all mandatory electrical and mechanical criteria. Forward voltage is 700 mV @ 10 A. Operating temperature range is -55 to 150°C, which is narrower at the low end (-55°C vs. -65°C). Product status is Active with 4,214 units in stock. This part is suitable for applications operating within the -55 to 150°C range.

All three substitute parts are ROHS3 Compliant and REACH Unaffected, maintaining regulatory compliance with the original MBR1045H.

Frequently Asked Questions (FAQ)

Q: Can MBR1045G be used as a direct drop-in replacement for MBR1045H?

A: Yes. MBR1045G is manufactured by onsemi and maintains identical electrical specifications across voltage rating (45 V), current rating (10 A), forward voltage (840 mV @ 20 A), reverse recovery speed (≤ 500ns), reverse leakage (100 µA @ 45 V), and operating temperature range (-65 to 175°C). The only difference is product status (Active vs. Obsolete) and packaging format (Tube). Mechanical compatibility is confirmed through identical TO-220-2 package specification.

Q: What is the difference between MBR1045-E3/45 and MBR1045H in terms of forward voltage?

A: MBR1045-E3/45 specifies forward voltage of 570 mV @ 10 A, while MBR1045H specifies 840 mV @ 20 A. These measurements are taken at different current levels. The lower forward voltage of MBR1045-E3/45 indicates reduced power dissipation during operation. Both parts meet the 45 V reverse voltage and 10 A current specifications required for substitution.

Q: Are there temperature range limitations when substituting MBR1045 (Taiwan Semiconductor) for MBR1045H?

A: MBR1045 from Taiwan Semiconductor Corporation operates from -55 to 150°C, compared to MBR1045H at -65 to 175°C. The substitute part has a narrower range at both extremes. If your application requires operation below -55°C or above 150°C, MBR1045 is not suitable. For applications within -55 to 150°C, this part is fully compatible.

Q: Do all substitute parts have the same package footprint?

A: Yes. All substitute parts use TO-220-2 through-hole packaging with identical mechanical dimensions and pin configuration. PCB layout and thermal management design remain unchanged. Packaging format variations (Tube vs. unspecified) refer to shipping and handling containers, not component dimensions.

Q: What is the inventory status for each substitute part?

A: MBR1045G has 50,200 units in stock (highest availability). MBR1045 has 4,214 units in stock. MBR1045-E3/45 has 2,350 units in stock. All parts are listed as New Original In Stock.

Q: Are all substitute parts RoHS and REACH compliant?

A: Yes. MBR1045G, MBR1045, and MBR1045-E3/45 are all ROHS3 Compliant and REACH Unaffected, maintaining regulatory compliance with the original MBR1045H specification.