MMBD355LT1 Equivalent & Substitute Parts

Part Overview

The MMBD355LT1 is an RF Schottky diode featuring a 1 Pair Common Anode configuration with a peak reverse voltage rating of 7V and power dissipation of 225 mW in a SOT-23-3 surface mount package. This component is classified as obsolete, making identification of suitable substitutes essential for ongoing design support and production continuity. The part operates across a junction temperature range of -55°C to 150°C and is non-RoHS compliant in its original form.

Substiute Parts

MMBD355LT1

onsemiIn Stock: 941MMBD355LT1 Datasheet

Current PartRFQ

MMBD355LT1G

onsemiIn Stock: 15274MMBD355LT1G Datasheet

DirectRFQ

BAV23S

Good-Ark SemiconductorIn Stock: 305194BAV23S Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the MMBD355LT1 is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Diode configuration: 1 Pair Common Anode topology
• Peak reverse voltage rating: 7V minimum
• Power dissipation capability: 225 mW minimum
• Package compatibility: SOT-23-3 (TO-236-3, SC-59)
• Operating temperature range: -55°C to 150°C minimum

Substitution Categories:

Direct Equivalent: Parts maintaining identical electrical specifications and diode configuration with active product status and improved compliance certifications.

Functional Equivalent: Parts with compatible package and thermal characteristics but differing electrical specifications that remain suitable for the application circuit topology.

Parameter Comparison

Engineering Selection Recommendations

MMBD355LT1G (Direct Equivalent): This onsemi part is the primary substitute for the obsolete MMBD355LT1. It maintains identical electrical specifications including 7V peak reverse voltage, 225 mW power dissipation, 1pF capacitance at 0V/1MHz, and the same SOT-23-3 package. The MMBD355LT1G is active in production status with ROHS3 compliance, addressing both obsolescence and regulatory requirements. Inventory availability is substantial at 15,200 pieces.

BAV23S (Functional Equivalent): The Good-Ark Semiconductor BAV23S provides package and thermal compatibility within the SOT-23-3 form factor and -55°C to 150°C operating range. However, this part differs in diode configuration (1 Pair Series Connection versus Common Anode) and electrical specifications (250V DC reverse voltage, 225mA current rating versus 7V peak reverse and 225 mW power dissipation). The BAV23S is suitable only for applications where the circuit topology can accommodate series-connected diode pairs and higher voltage ratings. This part is active with ROHS3 compliance and extensive inventory availability.

Frequently Asked Questions (FAQ)

Q: Can MMBD355LT1G be used as a direct replacement for MMBD355LT1?

A: Yes. The MMBD355LT1G is a direct equivalent with identical electrical specifications: 7V peak reverse voltage, 225 mW power dissipation, 1pF capacitance, and SOT-23-3 package. The primary advantages are active production status and ROHS3 compliance.

Q: What is the key difference between MMBD355LT1G and BAV23S?

A: The MMBD355LT1G maintains the Common Anode Schottky configuration with 7V rating, while the BAV23S uses a Series Connection topology with 250V rating. These differences affect circuit compatibility and application suitability. Selection depends on the specific circuit requirements.

Q: Are all three parts compatible with the same PCB footprint?

A: Yes. All three parts use the SOT-23-3 package (TO-236-3, SC-59), ensuring mechanical and footprint compatibility. However, electrical compatibility must be verified based on circuit design requirements.

Q: Why is the MMBD355LT1 classified as obsolete?

A: The MMBD355LT1 is no longer in active production. The MMBD355LT1G serves as the active production equivalent with improved compliance certifications.

Q: What compliance certifications apply to substitute parts?

A: Both MMBD355LT1G and BAV23S are ROHS3 compliant and REACH unaffected. The original MMBD355LT1 is non-RoHS compliant. Compliance requirements should be verified against your application and regional regulations.

Q: What packaging formats are available for these parts?

A: MMBD355LT1G is supplied in Tape & Reel (TR) format. BAV23S is available in Cut Tape (CT) and Digi-Reel® formats. Packaging selection depends on production volume and assembly requirements.