SMBJ24C-E3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ24C-E3/52 is a 24V Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, housed in a DO-214AA (SMB) surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The part operates across a temperature range of -55°C to 150°C and provides 600W peak pulse power protection for general-purpose transient suppression applications.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	24V
Voltage - Breakdown (Min)	26.7V
Voltage - Clamping (Max) @ Ipp	43V
Current - Peak Pulse (10/1000µs)	14A
Power - Peak Pulse	600W
Operating Temperature	-55°C ~ 150°C (TJ)
Package / Case	DO-214AA, SMB
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the SMBJ24C-E3/52 is determined by strict electrical and mechanical compatibility across the following parameters:

Critical Substitution Criteria:

Voltage - Reverse Standoff (Typ): 24V (exact match required)
Voltage - Breakdown (Min): 26.7V (exact match required)
Package / Case: DO-214AA, SMB (exact match required)
Bidirectional Channels: 1 (exact match required)
Type: Zener (exact match required)
RoHS Status: ROHS3 Compliant (compliance requirement)
Moisture Sensitivity Level (MSL): 1 (exact match required)

Allowable Variation Parameters:

Voltage - Clamping (Max) @ Ipp: 38.9V to 43V (within acceptable clamp voltage range)
Current - Peak Pulse (10/1000µs): 14A to 15.5A (within acceptable current range)
Operating Temperature: -50°C to -65°C minimum; 150°C to 175°C maximum (extended ranges acceptable)
Product Status: Active substitutes preferred over obsolete

All substitute parts listed maintain the same base product number (SMBJ24) and are manufactured by recognized semiconductor suppliers with active product status.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse	Operating Temperature	Product Status	Package
SMBJ24C-E3/52	Vishay General Semiconductor	24V	26.7V	43V	14A	-55°C ~ 150°C	Obsolete	DO-214AA (SMBJ)
SMBJ24CA-E3/52	Vishay General Semiconductor	24V	26.7V	38.9V	15.4A	-55°C ~ 150°C	Active	DO-214AA (SMBJ)
SMBJ24CE3/TR13	Microchip Technology	24V	26.7V	43V	14A	-65°C ~ 150°C	Active	DO-214AA (SMBJ)
SMBJ24CA-HRA	Littelfuse Inc.	24V	26.7V	38.9V	15.5A	-65°C ~ 150°C	Active	DO-214AA (SMBJ)
1SMB24CA TR13 PBFREE	Central Semiconductor Corp	24V	26.7V	38.9V	15.4A	-65°C ~ 150°C	Active	DO-214AA, SMB
SMBJ24CA	MDD	24V	26.7V	38.9V	15.5A	-50°C ~ 150°C	Active	DO-214AA, SMB
SMBJ24CA-13-F	Diodes Incorporated	24V	26.7V	38.9V	15.4A	-55°C ~ 150°C	Active	DO-214AA, SMB
SMBJ24CA-TP	Micro Commercial Co	24V	26.7V	38.9V	15.4A	-55°C ~ 175°C	Active	DO-214AA (SMB)

Engineering Selection Recommendations

Direct Electrical Equivalent (Identical Clamping Voltage): SMBJ24CE3/TR13 from Microchip Technology provides an exact electrical match with 43V clamping voltage and 14A peak pulse current. This part maintains active product status and extends the operating temperature minimum to -65°C, offering improved thermal performance over the obsolete original.

Preferred Substitutes (Lower Clamping Voltage, Higher Current Capability): SMBJ24CA-E3/52 (Vishay), SMBJ24CA-HRA (Littelfuse), 1SMB24CA TR13 PBFREE (Central Semiconductor), SMBJ24CA (MDD), SMBJ24CA-13-F (Diodes Incorporated), and SMBJ24CA-TP (Micro Commercial Co) all feature 38.9V clamping voltage with 15.4A to 15.5A peak pulse current. These parts are manufactured by established semiconductor suppliers with active product status and full ROHS3 compliance. The lower clamping voltage provides tighter transient suppression, while increased current capability offers enhanced protection margin.

Compliance Verification: All listed substitutes maintain ROHS3 compliance, MSL Level 1 (unlimited moisture sensitivity), and identical reverse standoff and breakdown voltage specifications. Selection should prioritize parts with active product status and established supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can SMBJ24CA-E3/52 directly replace SMBJ24C-E3/52? A: Yes. Both parts share identical reverse standoff voltage (24V), breakdown voltage (26.7V), and package (DO-214AA SMBJ). The SMBJ24CA-E3/52 is the active equivalent with lower clamping voltage (38.9V vs 43V) and higher peak pulse current (15.4A vs 14A), providing improved transient suppression performance.

Q: What is the difference between 43V and 38.9V clamping voltage? A: Clamping voltage determines the maximum voltage the TVS diode allows across the protected circuit during a transient event. The 38.9V clamp in substitute parts provides tighter voltage regulation, offering superior protection for sensitive components. Both values are within acceptable operating margins for 24V standoff applications.

Q: Are all substitute parts in the same package? A: Yes. All listed substitutes use DO-214AA (SMB) surface mount packaging, ensuring mechanical and thermal compatibility with existing PCB layouts designed for the SMBJ24C-E3/52.

Q: Which substitute offers the widest operating temperature range? A: SMBJ24CA-TP from Micro Commercial Co extends the maximum operating temperature to 175°C, compared to 150°C for the original part. This provides additional thermal margin for high-temperature applications.

Q: Are all substitutes ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL Level 1 rating, meeting current environmental and reliability standards.

Q: What is the difference between Tape & Reel and Cut Tape packaging options? A: Tape & Reel (TR) packaging is optimized for high-volume automated assembly. Cut Tape (CT) is suitable for lower-volume or manual assembly processes. Both formats contain identical components; packaging selection depends on manufacturing process requirements.

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