SMCJ24C Transient Voltage Suppressor - Equivalent & Substitute Parts

Part Overview

The SMCJ24C is a 1500W bidirectional transient voltage suppressor (TVS) diode manufactured by Taiwan Semiconductor Corporation. This surface mount component operates at a 24V reverse standoff voltage with a 43V maximum clamping voltage and 36A peak pulse current rating. The device is designed for general-purpose transient protection applications in surface mount configurations using the DO-214AB (SMC) package.

The SMCJ24C maintains Active product status and is RoHS3 compliant. Identification of equivalent substitute parts becomes necessary when primary inventory is unavailable or when alternative sourcing is required while maintaining identical electrical and mechanical performance specifications.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	24	V
Voltage - Breakdown (Min)	26.7	V
Voltage - Clamping (Max) @ Ipp	43	V
Current - Peak Pulse (10/1000µs)	36	A
Power - Peak Pulse	1500	W
Operating Temperature Range	-55 to 150	°C (TJ)
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Type	Zener	—
Bidirectional Channels	1	—

Substitute Part Grouping Explanation

Substitute parts for the SMCJ24C are identified based on strict equivalence of the following critical parameters:

Mandatory Matching Parameters:

Voltage - Reverse Standoff (Typ): 24V
Voltage - Breakdown (Min): 26.7V
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
Type: Zener
Bidirectional Channels: 1
Power - Peak Pulse: 1500W
Applications: General Purpose

Allowable Variation Parameters:

Voltage - Clamping (Max) @ Ipp: Substitute parts may vary within the range of 38.9V to 43V
Current - Peak Pulse (10/1000µs): Substitute parts may vary within the range of 36A to 38.6A
Operating Temperature Range: Substitute parts may have narrower ranges (minimum -50°C acceptable)

The SMCJ24CA from MDD qualifies as a direct substitute based on these criteria.

Parameter Comparison

Parameter	SMCJ24C (Taiwan Semiconductor)	SMCJ24CA (MDD)	Compatibility
Voltage - Reverse Standoff (Typ)	24V	24V	Identical
Voltage - Breakdown (Min)	26.7V	26.7V	Identical
Voltage - Clamping (Max) @ Ipp	43V	38.9V	Within Tolerance
Current - Peak Pulse (10/1000µs)	36A	38.6A	Within Tolerance
Power - Peak Pulse	1500W	1500W	Identical
Operating Temperature Range	-55°C to 150°C	-50°C to 150°C	Substitute Range Acceptable
Package / Case	DO-214AB, SMC	DO-214AB, SMC	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Type	Zener	Zener	Identical
Bidirectional Channels	1	1	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
REACH Status	REACH Unaffected	REACH Unaffected	Identical
ECCN	EAR99	EAR99	Identical
HTSUS	8541.10.0080	8541.10.0080	Identical

Engineering Selection Recommendations

The SMCJ24CA manufactured by MDD is a qualified substitute for the SMCJ24C. Both components maintain Active product status and are fully RoHS3 compliant and REACH unaffected, meeting current regulatory requirements.

The SMCJ24CA demonstrates superior peak pulse current capability (38.6A versus 36A) and lower maximum clamping voltage (38.9V versus 43V), both of which represent improved performance characteristics within the application envelope. The operating temperature range of the substitute extends to -50°C minimum, which is acceptable for applications not requiring the full -55°C lower limit of the original part.

Both components are certified under identical export control classifications (EAR99) and tariff codes (HTSUS 8541.10.0080), ensuring equivalent regulatory treatment.

The SMCJ24CA is available in significantly higher inventory (62,200 pieces) compared to the SMCJ24C (850 pieces), providing supply chain advantages.

Frequently Asked Questions (FAQ)

Q: Can the SMCJ24CA be used as a direct replacement for the SMCJ24C in existing designs?

A: Yes. Both components share identical reverse standoff voltage (24V), breakdown voltage (26.7V), power rating (1500W), package type (DO-214AB/SMC), and mounting configuration. The SMCJ24CA operates within acceptable parameter ranges for all critical specifications.

Q: What is the significance of the lower clamping voltage in the SMCJ24CA?

A: The SMCJ24CA maximum clamping voltage of 38.9V is lower than the SMCJ24C specification of 43V. This represents improved transient suppression performance, as the device clamps voltage transients to a lower level, providing enhanced circuit protection.

Q: Does the SMCJ24CA support the full operating temperature range of the SMCJ24C?

A: The SMCJ24CA operates from -50°C to 150°C, while the SMCJ24C operates from -55°C to 150°C. The substitute part does not extend to -55°C minimum. Applications requiring operation below -50°C must use the original SMCJ24C specification.

Q: Are there any package or footprint differences between these components?

A: No. Both the SMCJ24C and SMCJ24CA use the DO-214AB (SMC) surface mount package with identical mechanical dimensions and PCB footprint requirements.

Q: What compliance certifications apply to both parts?

A: Both components are RoHS3 compliant and REACH unaffected. Both are classified under ECCN EAR99 and HTSUS code 8541.10.0080, indicating equivalent regulatory status for export and trade purposes.

Q: Is the higher peak pulse current of the SMCJ24CA a concern for circuit compatibility?

A: No. The SMCJ24CA peak pulse current rating of 38.6A exceeds the SMCJ24C specification of 36A. This represents increased current handling capability and does not create compatibility issues in circuits designed for the original 36A specification.

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