SMLJ24C-TP Equivalent & Substitute Parts

Part Overview

The SMLJ24C-TP is a transient voltage suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose overvoltage protection in surface-mount applications. This bidirectional Zener diode operates with a 24V reverse standoff voltage and provides 3000W peak pulse power dissipation in a DO-214AB (SMC) package. The part is active and in production, with ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when electrical parameters and package compatibility align with the original specification, enabling component sourcing flexibility while maintaining circuit performance.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	24	V
Voltage - Breakdown (Min)	26.7	V
Voltage - Clamping (Max) @ Ipp	38.9	V
Current - Peak Pulse (10/1000µs)	77.2	A
Power - Peak Pulse	3000	W
Package / Case	DO-214AB, SMC	—
Operating Temperature Range	-55 to 175	°C
Type	Zener	—
Bidirectional Channels	1	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the SMLJ24C-TP are classified based on strict electrical and mechanical parameter alignment. The primary substitution criteria are:

Voltage - Reverse Standoff: 24V (exact match required)
Voltage - Clamping (Max) @ Ipp: 38.9V (exact match required)
Voltage - Breakdown (Min): 26.7V (exact match required)
Package / Case: DO-214AB or SMC (mechanical compatibility)
Bidirectional Channels: 1 (functional equivalence)
Type: Zener (device classification)

Parts are grouped into two categories:

Direct Equivalents: Parts with identical electrical specifications (Current - Peak Pulse 77.2A, Power - Peak Pulse 3000W) and matching package designations.

Functional Equivalents: Parts meeting all voltage and channel requirements but with reduced peak pulse current (38.6A) or peak pulse power (1500W), suitable for applications with lower transient energy requirements.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Package / Case	Operating Temperature	RoHS Status
SMLJ24C-TP	Micro Commercial Co	24V	26.7V	38.9V	77.2A	3000W	DO-214AB, SMC	-55 to 175°C	ROHS3 Compliant
3SMC24CA TR13 PBFREE	Central Semiconductor Corp	24V	26.7V	38.9V	77.2A	3000W	DO-214AB, SMC	-65 to 150°C	ROHS3 Compliant
SMC3K24CAHM3/57	Vishay General Semiconductor - Diodes Division	24V	26.7V	38.9V	77.1A	3000W	DO-214AB, SMC	-55 to 150°C	ROHS3 Compliant
SMCJ24CA	MDD	24V	26.7V	38.9V	38.6A	1500W	DO-214AB, SMC	-50 to 150°C	ROHS3 Compliant
SMDJ24CA	Alpha & Omega Semiconductor Inc.	24V	26.7V	38.9V	77.2A	3000W	DO-214AB, SMC	-55 to 150°C	ROHS3 Compliant
SMLJ24CA	Bourns Inc.	24V	26.7V	38.9V	77.2A	3000W	DO-214AB, SMC	-55 to 150°C	ROHS3 Compliant

Engineering Selection Recommendations

Direct Substitutes (Identical Electrical Performance):

The 3SMC24CA TR13 PBFREE (Central Semiconductor Corp), SMC3K24CAHM3/57 (Vishay), SMDJ24CA (Alpha & Omega Semiconductor), and SMLJ24CA (Bourns) are electrically equivalent to the SMLJ24C-TP, with matching voltage ratings, clamping characteristics, and peak pulse specifications. All are ROHS3 compliant and rated for surface-mount DO-214AB/SMC packages. The SMC3K24CAHM3/57 carries AEC-Q101 automotive qualification and is suitable for automotive-grade applications. Selection among these parts should be based on availability, lead time, and supply chain requirements.

Functional Substitute (Reduced Power Rating):

The SMCJ24CA (MDD) meets all voltage specifications but operates at half the peak pulse power (1500W versus 3000W) with proportionally reduced peak pulse current (38.6A versus 77.2A). This part is suitable for applications with lower transient energy exposure or where cost optimization is prioritized over maximum protection margin. Operating temperature range is -50 to 150°C, which is narrower than the original part.

All substitute parts maintain the same bidirectional Zener topology, single-channel configuration, and general-purpose application classification as the SMLJ24C-TP.

Frequently Asked Questions (FAQ)

Q: Can SMCJ24CA be used as a direct replacement for SMLJ24C-TP?

A: SMCJ24CA is functionally compatible for voltage regulation but operates at reduced power capacity (1500W versus 3000W). Use only in applications where transient energy levels do not exceed 1500W peak pulse power.

Q: What is the difference between DO-214AB and SMC package designations?

A: DO-214AB and SMC refer to the same physical package format for surface-mount diodes. Both designations are interchangeable for the listed parts.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all listed substitute parts carry ROHS3 compliance certification, matching the original SMLJ24C-TP specification.

Q: Does SMC3K24CAHM3/57 have automotive qualification?

A: Yes, SMC3K24CAHM3/57 is qualified to AEC-Q101 automotive standards and carries the TransZorb® series designation from Vishay, suitable for automotive transient protection applications.

Q: What is the operating temperature range difference between SMLJ24C-TP and its substitutes?

A: SMLJ24C-TP operates from -55 to 175°C. Most substitutes operate from -55 to 150°C or -50 to 150°C. Verify application temperature requirements before selection.

Q: Can I mix different manufacturers' parts in the same circuit board design?

A: Yes, all listed parts meet identical electrical specifications for voltage and clamping characteristics. Mixing manufacturers is acceptable from an electrical standpoint; however, verify PCB layout compatibility and thermal management requirements for your specific application.

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