SMCJ24 Equivalent & Substitute Parts Reference

Part Overview

The SMCJ24 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Taiwan Semiconductor Corporation, designed for general-purpose transient voltage protection applications. This surface-mount component operates with a 24V reverse standoff voltage and delivers 1500W peak pulse power in a DO-214AB (SMC) package. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are identified to address inventory availability, packaging format preferences, or specific application requirements while maintaining electrical compatibility within defined parameter tolerances.

Substiute Parts

SMCJ24

Taiwan Semiconductor CorporationIn Stock: 15508SMCJ24 Datasheet

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SMCJ24A

EVVO SemiIn Stock: 955149SMCJ24A Datasheet

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SMCJ24A

EVVO SemiIn Stock: 955149SMCJ24A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMCJ24 is determined by the following critical electrical parameters:

Primary Matching Criteria:

• Voltage - Reverse Standoff (Typ): 24V
• Voltage - Breakdown (Min): 26.7V
• Unidirectional Channels: 1
• Type: Zener
• Applications: General Purpose

Secondary Compatibility Factors:

• Operating Temperature Range: Must encompass or match the application requirement
• RoHS3 Compliance: Required for regulatory alignment
• Moisture Sensitivity Level: MSL 1 (Unlimited) preferred for storage flexibility
• Product Status: Active

The SMCJ24A from EVVO Semi qualifies as an equivalent substitute based on matching reverse standoff voltage (24V), breakdown voltage (26.7V), unidirectional topology, and Zener type classification. Differences in clamping voltage, peak pulse current, and power rating represent trade-offs that must be evaluated against specific circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

SMCJ24 (Primary Selection):

• Recommended for applications requiring 1500W peak pulse power dissipation
• Clamping voltage of 43V provides higher transient suppression margin
• Standard Tape & Reel packaging suitable for high-volume automated assembly
• Taiwan Semiconductor Corporation maintains established supply chain presence

SMCJ24A (Substitute Selection):

• Applicable when peak pulse power requirement is 600W or lower
• Lower clamping voltage (38.9V) suitable for circuits with tighter voltage margins
• Extended lower operating temperature limit (-65°C) accommodates cold environment applications
• Cut Tape and Digi-Reel® packaging options support flexible procurement strategies
• Higher inventory availability (955,100 pcs) supports rapid fulfillment

Both parts maintain Active product status, full RoHS3 compliance, and unlimited moisture sensitivity rating. Selection between primary and substitute should be based on circuit power dissipation requirements and package format availability.

Frequently Asked Questions (FAQ)

Q: Can SMCJ24A replace SMCJ24 in all applications?

A: SMCJ24A is electrically compatible for applications where peak pulse power does not exceed 600W. The SMCJ24 delivers 1500W peak pulse power; applications requiring this higher power rating must use the primary part. Both share identical reverse standoff voltage (24V) and breakdown voltage (26.7V).

Q: What is the significance of the different package designations (DO-214AB vs. DO-214AC)?

A: DO-214AB (SMC) and DO-214AC (SMA) are distinct surface-mount packages with different physical dimensions and land patterns. PCB layout and footprint design must match the selected package. These packages are not mechanically interchangeable without board redesign.

Q: Are there temperature range differences that affect substitution?

A: SMCJ24 operates from -55°C to 150°C, while SMCJ24A operates from -65°C to 150°C. SMCJ24A provides extended low-temperature capability. For applications within the -55°C to 150°C range, both parts are functionally equivalent. Applications requiring operation below -55°C require SMCJ24A.

Q: How do clamping voltage differences impact circuit protection?

A: SMCJ24 clamps at 43V maximum, while SMCJ24A clamps at 38.9V maximum. Lower clamping voltage provides tighter transient suppression but may increase component stress in high-energy transient events. Circuit design must validate that the selected clamping voltage is appropriate for protected component ratings.

Q: What packaging format differences exist between these parts?

A: SMCJ24 is supplied in Tape & Reel (TR) format. SMCJ24A is available in Cut Tape (CT) and Digi-Reel® formats. Tape & Reel is standard for high-volume automated pick-and-place assembly. Cut Tape and Digi-Reel® support lower-volume or manual assembly operations.

Q: Do both parts meet the same regulatory compliance standards?

A: Yes. Both SMCJ24 and SMCJ24A are RoHS3 compliant, carry MSL 1 (Unlimited) moisture sensitivity rating, and are classified as EAR99 for export control purposes. Both are REACH unaffected.