MBD301 Equivalent & Substitute Parts

Part Overview

The MBD301 is a Schottky detector/switch diode manufactured by onsemi, rated for 30V operation in a TO-226AC package. This component is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. The part is RoHS non-compliant and carries an MSL rating of 1 (Unlimited), indicating no moisture sensitivity constraints during storage and handling.

Substiute Parts

MBD301

onsemiIn Stock: 1119MBD301 Datasheet

Current PartRFQ

1N6263

STMicroelectronicsIn Stock: 32191N6263 Datasheet

SimilarRFQ

BAT42

STMicroelectronicsIn Stock: 45306BAT42 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the MBD301 is determined by the following electrical and mechanical criteria:

Device type: Schottky diode technology Voltage rating: Maximum DC reverse voltage of 30V or higher Package compatibility: Through-hole axial packages (DO-35 equivalent form factor) Current handling: Minimum 15mA average rectified current Product status: Active manufacturing preferred for long-term availability Compliance: RoHS3 compliance preferred for regulatory alignment

The identified substitutes—BAT42 and 1N6263—meet these criteria as active Schottky diodes with voltage ratings at or exceeding 30V, through-hole mounting, and current ratings suitable for detector and switching applications.

Parameter Comparison

Engineering Selection Recommendations

BAT42 is the primary substitute for the MBD301 in applications requiring 30V operation. Both devices share identical maximum reverse voltage ratings (30V) and are Schottky diodes with through-hole axial packages. The BAT42 offers superior current handling (200mA vs. unspecified for MBD301) and is actively manufactured by STMicroelectronics with ROHS3 compliance, providing long-term supply security and regulatory alignment for new designs.

1N6263 serves as an alternative substitute with a higher voltage rating (60V) and lower current capacity (15mA). This part is suitable for applications where the 30V rating of the MBD301 is marginal or where additional voltage headroom is required. The 1N6263 is also actively produced and ROHS3 compliant.

Both substitutes are available in DO-35 through-hole axial packages, compatible with existing PCB layouts designed for the MBD301's TO-226AC footprint, subject to mechanical verification of lead spacing and mounting hole alignment.

Frequently Asked Questions (FAQ)

Q: Can BAT42 directly replace MBD301 in all applications? A: BAT42 is electrically compatible as a 30V Schottky diode substitute. Physical package verification is required; while both are through-hole axial devices, TO-226AC and DO-35 packages have different lead configurations and spacing. PCB layout compatibility must be confirmed before implementation.

Q: What is the primary difference between BAT42 and 1N6263? A: BAT42 is rated for 30V maximum reverse voltage with 200mA average rectified current, matching the MBD301's voltage class. 1N6263 is rated for 60V with 15mA current capacity. Selection depends on circuit voltage requirements and current demands. For direct MBD301 replacement, BAT42 is the closer electrical match.

Q: Are both substitutes RoHS compliant? A: Yes. Both BAT42 and 1N6263 are ROHS3 compliant, whereas the MBD301 is RoHS non-compliant. This compliance upgrade is beneficial for new designs and regulatory requirements, though it does not affect electrical performance in the application.

Q: What is the inventory status of these substitutes? A: BAT42 has 45,200 pieces in stock. 1N6263 has 3,200 pieces in stock. Both are actively manufactured and readily available through distribution channels.

Q: Do package differences affect circuit performance? A: Package differences (TO-226AC vs. DO-35) affect physical mounting and PCB layout but not electrical performance. Lead inductance and thermal characteristics may vary slightly; however, for detector and switching applications, these differences are typically negligible. Mechanical fit on the PCB is the primary consideration.