MBR1545CTH Equivalent & Substitute Parts

Part Overview

The MBR1545CTH 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-220-3 through-hole configuration and features fast recovery characteristics with switching speed ≤ 500 ns for currents > 200 mA.

The MBR1545CTH is classified as obsolete. Locating equivalent or substitute components is necessary to support ongoing production requirements, maintenance operations, and system redesigns where this part is specified in existing designs.

Substiute Parts

MBR1545CTH

onsemiIn Stock: 969MBR1545CTH Datasheet

Current PartRFQ

MBR1545CTG

onsemiIn Stock: 28286MBR1545CTG Datasheet

DirectRFQ

VS-MBR1545CT-M3

Vishay General Semiconductor - Diodes DivisionIn Stock: 8527VS-MBR1545CT-M3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MBR1545CTH is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Parameters:

• Diode configuration: 1 Pair Common Cathode
• Technology: Schottky
• Maximum reverse voltage (Vr): 45 V
• Package / Case: TO-220-3
• Mounting type: Through Hole
• Forward voltage (Vf) @ If: 840 mV @ 15 A
• Reverse leakage current @ Vr: 100 µA @ 45 V
• Recovery speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)

Current Rating Consideration: The MBR1545CTH specifies 15 A average rectified current per diode. Substitute parts with lower current ratings (7.5 A) remain functionally compatible in applications where the actual operating current does not exceed the substitute part's rating. The substitute parts listed below meet all other electrical and mechanical parameters.

Product Status: The MBR1545CTH is obsolete. Active substitute parts are available from the same manufacturer (onsemi) and from alternative qualified manufacturers (Vishay General Semiconductor - Diodes Division).

Parameter Comparison

Engineering Selection Recommendations

MBR1545CTG (onsemi): The MBR1545CTG is an active product from the original manufacturer onsemi. It maintains electrical equivalence across all critical parameters including reverse voltage, forward voltage, recovery speed, and reverse leakage current. The current rating is reduced to 7.5 A per diode. This part is ROHS3 compliant and REACH unaffected. The extended operating temperature range (-65 to 175 °C) provides additional thermal margin compared to the main part. Selection of this part is appropriate for applications where the circuit current does not exceed 7.5 A per diode.

VS-MBR1545CT-M3 (Vishay General Semiconductor - Diodes Division): The VS-MBR1545CT-M3 is an active product from Vishay General Semiconductor - Diodes Division. It maintains electrical equivalence across all critical parameters including reverse voltage, forward voltage, recovery speed, and reverse leakage current. The current rating is reduced to 7.5 A per diode. This part is ROHS3 compliant and REACH unaffected. The operating temperature range matches the main part (-65 to 150 °C). Selection of this part is appropriate for applications where the circuit current does not exceed 7.5 A per diode and where multi-source qualification is required.

Current Rating Derating: Both substitute parts operate at 7.5 A average rectified current per diode, which is 50% of the main part's 15 A rating. Applications requiring the full 15 A rating per diode must source alternative parts with equivalent 15 A specifications or implement parallel device configurations.

Frequently Asked Questions (FAQ)

Q: Can MBR1545CTG or VS-MBR1545CT-M3 be used as direct replacements for MBR1545CTH?

A: Both parts are electrically and mechanically compatible with the MBR1545CTH in applications where the circuit current does not exceed 7.5 A per diode. All critical electrical parameters including reverse voltage (45 V), forward voltage (840 mV @ 15 A), recovery speed (≤ 500 ns), and reverse leakage current (100 µA @ 45 V) are identical. The TO-220-3 package and through-hole mounting are identical. If the application requires the full 15 A rating per diode, alternative parts with 15 A specifications must be sourced.

Q: What is the difference between MBR1545CTG and VS-MBR1545CT-M3?

A: Both parts share identical electrical specifications and package configuration. The primary differences are manufacturer (onsemi versus Vishay) and operating temperature range. MBR1545CTG operates from -65 to 175 °C, while VS-MBR1545CT-M3 operates from -65 to 150 °C. Selection between these parts depends on thermal requirements and supplier qualification preferences.

Q: Why is the current rating lower on the substitute parts?

A: The MBR1545CTG and VS-MBR1545CT-M3 are rated at 7.5 A average rectified current per diode, compared to 15 A for the MBR1545CTH. This is a design characteristic of these specific part variants. Applications requiring 15 A per diode must identify alternative parts with equivalent 15 A ratings or implement parallel device configurations.

Q: Are the substitute parts RoHS and REACH compliant?

A: Both MBR1545CTG and VS-MBR1545CT-M3 are ROHS3 compliant and REACH unaffected, matching the compliance status of the main part MBR1545CTH.

Q: Can these parts be used in parallel to achieve higher current ratings?

A: Parallel operation of Schottky diode arrays requires careful circuit design to ensure balanced current distribution. The electrical characteristics provided in this reference do not include parameters necessary to evaluate parallel operation. Circuit design considerations for parallel operation must be addressed through detailed application analysis and manufacturer guidance.

Q: What is the package compatibility between these parts?

A: All three parts (MBR1545CTH, MBR1545CTG, and VS-MBR1545CT-M3) use the TO-220-3 package with through-hole mounting. Pin configuration and mechanical dimensions are identical, allowing direct PCB footprint compatibility.