MBD301G Equivalent & Substitute Parts

Part Overview

The MBD301G is an RF Schottky diode manufactured by onsemi, designed for high-frequency applications requiring low forward voltage drop and fast switching characteristics. This single-junction Schottky diode is rated for 30V peak reverse voltage with 280 mW power dissipation in a TO-92 package. The product is currently obsolete, making identification of compatible substitute components essential for design continuity and procurement planning.

Substiute Parts

MBD301G

onsemiIn Stock: 962MBD301G Datasheet

Current PartRFQ

MMBD301LT1G

onsemiIn Stock: 125406MMBD301LT1G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MBD301G is determined by strict equivalence across the following electrical and mechanical parameters:

• Diode Type: Must be Schottky - Single junction configuration
• Voltage Rating: Peak reverse voltage must be 30V or greater
• Capacitance: Must match 1.5pF @ 15V, 1MHz specification
• Operating Temperature: Must support -55°C ~ 125°C range
• Moisture Sensitivity: MSL rating must be 1 (Unlimited) or equivalent

The MMBD301LT1G meets all electrical equivalence criteria. While it features a different package format (SOT-23-3 versus TO-92), the electrical characteristics remain identical, allowing functional substitution in applications where package footprint can be accommodated through board redesign or adapter solutions.

Parameter Comparison

Engineering Selection Recommendations

The MMBD301LT1G is the direct electrical equivalent for the obsolete MBD301G. Both components share identical voltage ratings, capacitance characteristics, and operating temperature specifications from onsemi's Schottky diode portfolio.

Product Status Consideration: The MBD301G is obsolete with limited remaining inventory (896 Pcs). The MMBD301LT1G is an active product with substantial availability (125,300 Pcs), ensuring long-term procurement viability.

Compliance Status: Both components carry identical REACH and ECCN classifications (REACH Unaffected, EAR99), with the MMBD301LT1G additionally certified as RoHS3 Compliant, meeting modern regulatory requirements.

Power Dissipation Note: The MMBD301LT1G is rated for 200 mW maximum power dissipation compared to the MBD301G's 280 mW. Design verification is required to confirm that application power requirements do not exceed 200 mW continuous dissipation.

Package Transition: Substitution requires PCB layout modification due to package change from TO-92 to SOT-23-3. This is a standard surface-mount package widely supported by manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Can MMBD301LT1G directly replace MBD301G without circuit modification?

A: Electrical substitution is direct. The components are functionally equivalent across all specified electrical parameters. Physical board layout modification is required due to package format change (through-hole TO-92 to surface-mount SOT-23-3).

Q: What is the significance of the power dissipation difference (280 mW vs 200 mW)?

A: The MMBD301LT1G's lower power rating reflects its smaller SOT-23-3 package thermal characteristics. Applications must verify that continuous power dissipation remains below 200 mW. Peak or transient dissipation may exceed this value if thermal time constants are considered.

Q: Are there any compliance or certification differences?

A: Both components share REACH Unaffected and EAR99 classifications. The MMBD301LT1G additionally carries RoHS3 Compliance certification, making it suitable for applications with modern environmental requirements.

Q: Why is the MBD301G obsolete?

A: The MBD301G represents an older through-hole package technology. onsemi has transitioned its Schottky diode portfolio toward surface-mount packages like SOT-23-3, which offer improved thermal performance, smaller footprints, and better integration with modern manufacturing processes.

Q: Is the capacitance specification identical between both parts?

A: Yes. Both components specify 1.5pF @ 15V, 1MHz, ensuring equivalent high-frequency performance and switching characteristics in RF applications.

Q: What packaging format does MMBD301LT1G use?

A: MMBD301LT1G is supplied in Tape & Reel (TR) format in SOT-23-3 (TO-236) surface-mount package, standard for automated assembly processes.