MBR30L45CTG Equivalent & Substitute Parts

Part Overview

The MBR30L45CTG 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 operates across a junction temperature range of -55°C to 150°C.

This part carries an obsolete product status. Identifying equivalent and substitute components is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this diode array configuration.

Substiute Parts

MBR30L45CTG

onsemiIn Stock: 1350MBR30L45CTG Datasheet

Current PartRFQ

VT3045C-M3/4W

Vishay General Semiconductor - Diodes DivisionIn Stock: 1734VT3045C-M3/4W Datasheet

SimilarRFQ

SDT3045VCT

Diodes IncorporatedIn Stock: 1056SDT3045VCT Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MBR30L45CTG is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

• Diode Configuration: 1 Pair Common Cathode
• Technology: Schottky
• Voltage - DC Reverse (Vr) (Max): 45 V
• Current - Average Rectified (Io) (per Diode): 15 A
• Package / Case: TO-220-3
• Mounting Type: Through Hole
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)

Allowable Parameter Variations:

• Voltage - Forward (Vf) (Max) @ If: Tolerance range 500–570 mV @ 15 A
• Current - Reverse Leakage @ Vr: Range 500 µA to 2 mA @ 45 V
• Operating Temperature - Junction: Minimum -55°C to -40°C; Maximum 150°C (all acceptable)

The identified substitute parts meet all mandatory equivalence criteria and fall within allowable parameter variations, confirming functional and mechanical compatibility with the original MBR30L45CTG specification.

Parameter Comparison

Engineering Selection Recommendations

VT3045C-M3/4W (Vishay General Semiconductor - Diodes Division): This substitute is an active product with AEC-Q101 automotive qualification. The forward voltage specification of 570 mV @ 15 A represents a 70 mV increase relative to the MBR30L45CTG. The reverse leakage current of 2 mA @ 45 V is elevated compared to the original specification. The operating temperature range is -40°C to 150°C, which narrows the lower temperature boundary by 15°C. Selection of this part is appropriate for applications where automotive-grade qualification and active product status are required, provided the thermal and leakage characteristics are acceptable for the target application.

SDT3045VCT (Diodes Incorporated): This substitute is an active product with ROHS3 compliance. The forward voltage specification of 500 mV @ 15 A matches the original MBR30L45CTG exactly. The reverse leakage current of 500 µA @ 45 V is lower than the original specification. The operating temperature range of -55°C to 150°C is identical to the original part. This part provides the closest parametric alignment with the MBR30L45CTG and is suitable for direct substitution in applications requiring equivalent electrical performance and extended low-temperature operation.

Frequently Asked Questions (FAQ)

Q: Can the VT3045C-M3/4W be used as a direct replacement for the MBR30L45CTG?

A: The VT3045C-M3/4W meets all mandatory equivalence criteria for diode configuration, technology, voltage rating, current rating, package type, and mounting method. However, the forward voltage is specified at 570 mV @ 15 A compared to 500 mV @ 15 A for the original part, and the reverse leakage current is 2 mA @ 45 V versus 650 µA @ 45 V. Additionally, the minimum operating temperature is -40°C rather than -55°C. These differences must be evaluated against the specific thermal and electrical requirements of the target application.

Q: Can the SDT3045VCT be used as a direct replacement for the MBR30L45CTG?

A: Yes. The SDT3045VCT matches the MBR30L45CTG across all critical parameters: forward voltage of 500 mV @ 15 A, reverse leakage current of 500 µA @ 45 V, operating temperature range of -55°C to 150°C, and identical package configuration TO-220-3. The part is active and ROHS3 compliant, supporting direct substitution.

Q: What is the significance of the TO-220-3 package specification?

A: The TO-220-3 package is a through-hole configuration with three leads, establishing the physical and electrical interface for the diode array. All substitute parts must use this identical package to ensure mechanical fit on printed circuit boards and compatibility with existing PCB layouts and assembly processes.

Q: How do forward voltage differences affect circuit performance?

A: Forward voltage (Vf) determines the voltage drop across the diode during conduction. The VT3045C-M3/4W specifies 570 mV @ 15 A, which is 70 mV higher than the MBR30L45CTG at 500 mV @ 15 A. This difference increases power dissipation and heat generation. Applications with tight voltage regulation or thermal constraints must account for this variation.

Q: What does reverse leakage current indicate?

A: Reverse leakage current (Ir) is the small current that flows through the diode when reverse-biased. The MBR30L45CTG specifies 650 µA @ 45 V, while the SDT3045VCT specifies 500 µA @ 45 V and the VT3045C-M3/4W specifies 2 mA @ 45 V. Lower leakage current reduces standby power consumption and heat generation in reverse-biased conditions.

Q: Why is the operating temperature range important for substitution?

A: The operating temperature range defines the junction temperature limits within which the diode functions reliably. The MBR30L45CTG and SDT3045VCT both specify -55°C to 150°C, while the VT3045C-M3/4W specifies -40°C to 150°C. Applications requiring operation below -40°C must use parts with the extended lower temperature specification.

Q: What does AEC-Q101 qualification mean?

A: AEC-Q101 is an automotive industry qualification standard for discrete semiconductors. The VT3045C-M3/4W carries this qualification, indicating it meets automotive reliability and quality requirements. This certification is relevant for applications in automotive or similarly demanding environments.

Q: What is ROHS3 compliance?

A: ROHS3 compliance indicates the part meets the Restriction of Hazardous Substances Directive, restricting the use of specific hazardous materials in electrical and electronic equipment. The SDT3045VCT is ROHS3 compliant, supporting environmental and regulatory requirements in applicable markets.