SMB8J24CA-M3/5B Equivalent & Substitute Parts

Part Overview

The SMB8J24CA-M3/5B is a bidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the DO-214AA (SMB) package and is designed for general-purpose transient voltage suppression applications. The part is active in production status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified based on matching electrical specifications and package compatibility to support procurement flexibility and supply chain continuity.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	24V
Voltage - Breakdown (Min)	26.7V
Voltage - Clamping (Max) @ Ipp	38.9V
Current - Peak Pulse (10/1000µs)	20.6A
Power - Peak Pulse	800W
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
Operating Temperature Range	-55°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SMB8J24CA-M3/5B are qualified based on the following electrical and mechanical parameters:

Voltage - Reverse Standoff (Typ): 24V
Voltage - Breakdown (Min): 26.7V
Voltage - Clamping (Max) @ Ipp: 38.9V
Package / Case: DO-214AA, SMB (surface mount)
Bidirectional Channels: 1
Type: Zener TVS Diode
RoHS3 Compliance: Required
Moisture Sensitivity Level: 1 (Unlimited)

All substitute parts maintain identical voltage specifications and package form factor. Variations in peak pulse current (15.4A to 20.6A) and power dissipation (600W to 800W) are within acceptable substitution parameters for this component category. Operating temperature ranges vary between manufacturers (-50°C to -65°C minimum) but all maintain the 150°C maximum junction temperature specification.

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	Operating Temperature	Package	RoHS Status
SMB8J24CA-M3/5B	Vishay General Semiconductor - Diodes Division	24V	26.7V	38.9V	20.6A	800W	-55°C ~ 150°C	DO-214AA, SMB	ROHS3 Compliant
1SMB24CA TR13 PBFREE	Central Semiconductor Corp	24V	26.7V	38.9V	15.4A	600W	-65°C ~ 150°C	DO-214AA, SMB	ROHS3 Compliant
SMBJ24CA	MDD	24V	26.7V	38.9V	15.5A	600W	-50°C ~ 150°C	DO-214AA, SMB	ROHS3 Compliant
SMBJ24CA-13-F	Diodes Incorporated	24V	26.7V	38.9V	15.4A	600W	-55°C ~ 150°C	DO-214AA, SMB	ROHS3 Compliant
SMBJ24CA-TR	STMicroelectronics	24V	26.7V	38.9V	16A	600W	-55°C ~ 150°C	DO-214AA, SMB	ROHS3 Compliant
SZ1SMB24CAT3G	onsemi	24V	26.7V	38.9V	15.4A	600W	-65°C ~ 150°C	DO-214AA, SMB	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts maintain active production status and full RoHS3 compliance. Selection among these alternatives should be based on:

Electrical Performance: The SMB8J24CA-M3/5B provides 20.6A peak pulse current and 800W power dissipation. Substitute parts rated at 15.4A to 16A peak pulse current with 600W power dissipation represent lower performance specifications but remain functionally equivalent for applications within their rated parameters.

Temperature Range: The Vishay part specifies -55°C to 150°C operating range. Central Semiconductor Corp (1SMB24CA TR13 PBFREE) and onsemi (SZ1SMB24CAT3G) extend the minimum temperature to -65°C. MDD (SMBJ24CA) limits minimum temperature to -50°C. Selection depends on application temperature requirements.

Packaging and Availability: All parts use identical DO-214AA (SMB) surface mount packages. Packaging variants include Tape & Reel (TR), Cut Tape (CT) & Digi-Reel®, and Bulk formats. Inventory levels vary significantly across manufacturers, with MDD offering the highest stock (210,110 pcs).

Automotive Grade: The onsemi SZ1SMB24CAT3G carries AEC-Q101 automotive qualification, suitable for automotive applications requiring this certification.

Frequently Asked Questions (FAQ)

Q: Can I substitute the SMB8J24CA-M3/5B with any of the listed parts?

A: Yes, all listed parts are qualified substitutes based on matching voltage specifications (24V reverse standoff, 26.7V breakdown, 38.9V clamping) and identical DO-214AA (SMB) package form factor. Verify that your application can accommodate the lower peak pulse current ratings (15.4A to 16A) compared to the original part (20.6A).

Q: What is the difference between the 20.6A and 15.4A peak pulse current ratings?

A: Peak pulse current determines the maximum transient current the diode can suppress. The SMB8J24CA-M3/5B handles 20.6A, while most substitutes handle 15.4A to 16A. Select based on your circuit's maximum transient current requirements. Lower-rated parts are suitable for applications with transient currents below their specified limits.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all listed substitute parts carry ROHS3 compliance certification, meeting environmental and hazardous substance restrictions.

Q: Does operating temperature range affect substitution?

A: Operating temperature ranges vary: Vishay and Diodes Incorporated specify -55°C minimum, Central Semiconductor and onsemi specify -65°C minimum, and MDD specifies -50°C minimum. All maintain 150°C maximum. Select based on your application's minimum operating temperature requirement.

Q: Is the onsemi SZ1SMB24CAT3G suitable for automotive applications?

A: Yes, the onsemi part carries AEC-Q101 automotive qualification. Use this part if your application requires automotive-grade components.

Q: What packaging options are available?

A: Substitute parts are available in Tape & Reel (TR), Cut Tape (CT) & Digi-Reel®, and Bulk packaging formats. Select based on your procurement and assembly requirements.

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