MBRB1540CT-T Equivalent & Substitute Parts

Part Overview

The MBRB1540CT-T is a Schottky diode array manufactured by Diodes Incorporated, configured as 1 pair common cathode with a maximum reverse voltage of 40 V and average rectified current of 15 A per diode. The device is housed in a TO-263-3 D2PAK surface mount package with 2 leads plus tab. This part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and procurement needs.

Substiute Parts

MBRB1540CT-T

Diodes IncorporatedIn Stock: 993MBRB1540CT-T Datasheet

Current PartRFQ

STPS10L40CG-TR

STMicroelectronicsIn Stock: 2079STPS10L40CG-TR Datasheet

MFR RecommendedRFQ

STPS2545CGY-TR

STMicroelectronicsIn Stock: 3116STPS2545CGY-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MBRB1540CT-T is determined by the following critical parameters: diode configuration (1 pair common cathode), technology (Schottky), package type (TO-263-3 D2PAK), mounting method (surface mount), and electrical ratings within acceptable operating ranges.

The identified substitute parts maintain identical diode configuration and package form factor. Substitution compatibility is established through:

1. Diode Configuration: Both substitute parts maintain 1 pair common cathode topology, ensuring pin-level compatibility.
2. Technology: Both substitutes employ Schottky technology, preserving fast recovery characteristics and forward voltage behavior.
3. Package Compatibility: Both substitutes use TO-263-3 D2PAK surface mount packaging, enabling direct PCB placement without layout modification.
4. Voltage Rating: Substitute parts meet or exceed the 40 V reverse voltage requirement.
5. Current Rating: Current ratings of substitute parts must be evaluated against application requirements; lower ratings require design verification, while higher ratings provide margin.
6. Compliance: Both substitutes maintain ROHS3 compliance and MSL 1 rating, matching the original part's environmental and regulatory status.

Parameter Comparison

Engineering Selection Recommendations

STPS10L40CG-TR is suitable for applications where the current requirement does not exceed 5 A per diode. This substitute maintains the 40 V reverse voltage rating and offers improved forward voltage characteristics (530 mV @ 5 A versus 700 mV @ 7.5 A). The part is in active production status with ROHS3 compliance. Operating temperature range is limited to a maximum of 150°C, matching the upper limit of the original part.

STPS2545CGY-TR is suitable for applications requiring current ratings between 12.5 A and 15 A per diode. This substitute provides a 45 V reverse voltage rating, exceeding the original 40 V specification. The part includes automotive-grade qualification (AEC-Q101) and operates across an extended temperature range of -40°C to 175°C. This substitute is in active production status with ROHS3 compliance. Forward voltage is specified at 25 A (840 mV), which differs from the original specification point.

Both substitutes are available in active production status, ensuring long-term supply continuity compared to the obsolete original part. Selection between substitutes depends on application current requirements and thermal operating conditions.

Frequently Asked Questions (FAQ)

Q: Can STPS10L40CG-TR directly replace MBRB1540CT-T in all applications?

A: STPS10L40CG-TR maintains identical package, configuration, and voltage rating. However, the current rating is reduced from 15 A to 5 A per diode. Direct replacement is only valid for applications where the maximum current requirement does not exceed 5 A per diode.

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

A: STPS10L40CG-TR is rated for 5 A at 40 V with lower forward voltage. STPS2545CGY-TR is rated for 12.5 A at 45 V with automotive qualification and extended temperature range. Selection depends on current and temperature requirements of the specific application.

Q: Are both substitute parts pin-compatible with the original MBRB1540CT-T?

A: Yes. Both substitutes use the TO-263-3 D2PAK package with identical pin configuration (2 leads plus tab), enabling direct PCB placement without modification.

Q: Do the substitute parts meet the same compliance standards as the original?

A: Both substitutes are ROHS3 compliant with MSL 1 rating, matching the original part's environmental compliance. STPS2545CGY-TR includes additional automotive qualification (AEC-Q101).

Q: What is the impact of higher reverse leakage current in the substitutes?

A: STPS10L40CG-TR exhibits 200 µA reverse leakage at 40 V compared to 100 µA in the original. STPS2545CGY-TR exhibits 125 µA at 45 V. Higher leakage may impact low-power standby performance; application-specific evaluation is necessary.

Q: Can STPS2545CGY-TR be used in place of MBRB1540CT-T for 15 A applications?

A: STPS2545CGY-TR is rated for 12.5 A per diode, which is below the original 15 A rating. Use in 15 A applications requires design margin analysis and thermal management verification.

Q: What is the significance of the extended temperature range in STPS2545CGY-TR?

A: STPS2545CGY-TR operates from -40°C to 175°C, compared to -65°C to 150°C for the original. The lower minimum temperature (-40°C versus -65°C) may be limiting for extreme cold environment applications. The higher maximum temperature (175°C) provides additional thermal margin.