SMBJ24C-E3/5B Equivalent & Substitute Parts

Part Overview

The SMBJ24C-E3/5B is a transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for general-purpose overvoltage protection in surface-mount applications. This part operates with a 24V reverse standoff voltage and provides 43V maximum clamping voltage at peak pulse current. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Reverse Standoff Voltage (Typ)	24V
Breakdown Voltage (Min)	26.7V
Clamping Voltage (Max) @ Ipp	43V
Peak Pulse Current (10/1000µs)	14A
Peak Pulse Power	600W
Package Type	DO-214AA (SMB)
Mounting Type	Surface Mount
Operating Temperature Range	-55°C to 150°C (TJ)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the SMBJ24C-E3/5B is determined by the following critical parameters:

Reverse standoff voltage of 24V
Breakdown voltage minimum of 26.7V
Package compatibility: DO-214AA (SMB) surface mount
Bidirectional single-channel Zener diode configuration
Peak pulse power rating of 600W
RoHS3 compliance and REACH unaffected status

Substitute parts are grouped into two categories based on clamping voltage performance:

Group A (Exact Clamping Match): Parts with 43V maximum clamping voltage matching the original specification.

Group B (Alternative Clamping Performance): Parts with 38.9V maximum clamping voltage, offering higher peak pulse current capability (15.4A to 15.5A) while maintaining the same reverse standoff and breakdown voltage parameters.

Parameter Comparison

Part Number	Manufacturer	Standoff Voltage	Breakdown Voltage (Min)	Clamping Voltage (Max)	Peak Pulse Current	Operating Temp Range	Product Status	Package
SMBJ24C-E3/5B	Vishay	24V	26.7V	43V	14A	-55°C to 150°C	Obsolete	DO-214AA (SMBJ)
SMBJ24CE3/TR13	Microchip Technology	24V	26.7V	43V	14A	-65°C to 150°C	Active	DO-214AA (SMBJ)
SMBJ24CA-E3/5B	Vishay	24V	26.7V	38.9V	15.4A	-55°C to 150°C	Active	DO-214AA (SMBJ)
SMBJ24CA-HRA	Littelfuse Inc.	24V	26.7V	38.9V	15.5A	-65°C to 150°C	Active	DO-214AA (SMBJ)
1SMB24CA TR13 PBFREE	Central Semiconductor Corp	24V	26.7V	38.9V	15.4A	-65°C to 150°C	Active	DO-214AA (SMB)
SMBJ24CA-13-F	Diodes Incorporated	24V	26.7V	38.9V	15.4A	-55°C to 150°C	Active	DO-214AA (SMB)
SMBJ24CA-TP	Micro Commercial Co	24V	26.7V	38.9V	15.4A	-55°C to 175°C	Active	DO-214AA (SMB)
SMBJ24CA	MDD	24V	26.7V	38.9V	15.5A	-50°C to 150°C	Active	DO-214AA (SMB)

Engineering Selection Recommendations

Primary Recommendation: SMBJ24CE3/TR13 (Microchip Technology) provides the closest electrical match to the original SMBJ24C-E3/5B, with identical clamping voltage (43V) and peak pulse current (14A). This part is active in production and ROHS3 compliant, making it the direct replacement for applications requiring exact electrical performance specifications.

Alternative Selection: SMBJ24CA-HRA (Littelfuse Inc.) or SMBJ24CA-TP (Micro Commercial Co) are suitable for applications where slightly lower clamping voltage (38.9V) is acceptable. These parts offer higher peak pulse current capability (15.4A to 15.5A) and extended temperature ranges (-65°C to 150°C or -55°C to 175°C), providing enhanced performance margins in demanding environments. Both are active products with full ROHS3 compliance.

High-Volume Availability: SMBJ24CA (MDD) offers the largest inventory (210,110 pcs) among substitute options, supporting high-volume production requirements while maintaining electrical compatibility within the specified parameter ranges.

All recommended substitutes maintain DO-214AA (SMB) package compatibility, surface-mount configuration, 600W peak pulse power rating, and ROHS3 compliance with REACH unaffected status.

Frequently Asked Questions (FAQ)

Q: Can SMBJ24CA-E3/5B replace SMBJ24C-E3/5B directly?

A: Yes. Both parts share identical reverse standoff voltage (24V), breakdown voltage (26.7V), and package type (DO-214AA SMBJ). The SMBJ24CA-E3/5B is active in production and offers the same electrical performance with higher peak pulse current (15.4A vs 14A).

Q: What is the difference between 43V and 38.9V clamping voltage options?

A: The 43V clamping voltage (SMBJ24CE3/TR13) matches the original specification exactly. The 38.9V clamping voltage alternatives (SMBJ24CA series) provide lower clamping but support higher peak pulse current (15.4A to 15.5A vs 14A). Selection depends on circuit requirements for maximum transient voltage suppression versus current handling capability.

Q: Are all substitute parts compatible with the original DO-214AA footprint?

A: Yes. All listed substitutes use DO-214AA (SMB) surface-mount packaging, ensuring mechanical and electrical compatibility with existing PCB designs. Verify specific supplier device package designations (SMBJ vs SMB) with your assembly process documentation.

Q: Which substitute offers the widest operating temperature range?

A: SMBJ24CA-TP (Micro Commercial Co) supports -55°C to 175°C, providing the broadest temperature coverage. SMBJ24CA-HRA and 1SMB24CA TR13 PBFREE both support -65°C to 150°C, extending the lower temperature limit compared to the original -55°C specification.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component procurement.

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