SMBJ24CA-M3/5B Equivalent & Substitute Parts

Part Overview

The SMBJ24CA-M3/5B is a transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This bidirectional Zener diode operates in the DO-214AA (SMB) surface mount package and is designed for general-purpose transient voltage suppression applications. The part is currently active in production with 983 units in stock. Alternative part numbers are necessary when the primary part becomes unavailable, when different packaging formats are required, or when sourcing from alternative manufacturers is preferred for supply chain optimization.

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)	15.4A
Power - Peak Pulse	600W
Operating Temperature Range	-55°C ~ 150°C (TJ)
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SMBJ24CA-M3/5B are grouped based on strict electrical and mechanical compatibility criteria. All qualified substitutes maintain the following core parameters:

Voltage - Reverse Standoff (Typ): 24V
Voltage - Breakdown (Min): 26.7V minimum
Voltage - Clamping (Max) @ Ipp: 38.9V or lower
Current - Peak Pulse (10/1000µs): 15.4A or higher
Power - Peak Pulse: 600W
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Substitutes are classified into three categories: direct Vishay equivalents with identical electrical specifications, cross-manufacturer alternatives meeting the same electrical parameters, and variants with minor specification tolerances within acceptable operating ranges.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Breakdown (Min)	Voltage - Clamping (Max)	Current - Peak Pulse	Power - Peak Pulse	Operating Temperature	Packaging	Product Status
SMBJ24CA-M3/5B	Vishay	24V	26.7V	38.9V	15.4A	600W	-55°C ~ 150°C	Tape & Reel (TR)	Active
SMBJ24CA-E3/52	Vishay	24V	26.7V	38.9V	15.4A	600W	-55°C ~ 150°C	Tape & Reel (TR)	Active
SMBJ24CAHE3/52	Vishay	24V	26.7V	38.9V	15.4A	600W	-55°C ~ 150°C	Cut Tape (CT) & Digi-Reel®	Discontinued at DiGi Electronics
SMBJ24CD-M3/I	Vishay	24V	27.1V	38.4V	15.6A	600W	-55°C ~ 150°C	Tape & Reel (TR)	Active
SMBJ24CA-E3/5B	Vishay	24V	26.7V	38.9V	15.4A	600W	-55°C ~ 150°C	Tape & Reel (TR)	Active
1SMB24CA TR13 PBFREE	Central Semiconductor Corp	24V	26.7V	38.9V	15.4A	600W	-65°C ~ 150°C	Tape & Reel (TR)	Active
SMBJ24CA	MDD	24V	26.7V	38.9V	15.5A	600W	-50°C ~ 150°C	Not specified	Active
SMBJ24CA-13-F	Diodes Incorporated	24V	26.7V	38.9V	15.4A	600W	-55°C ~ 150°C	Cut Tape (CT) & Digi-Reel®	Active
SMBJ24CA-TP	Micro Commercial Co	24V	26.7V	38.9V	15.4A	600W	-55°C ~ 175°C	Tape & Reel (TR)	Active
SZ1SMB24CAT3G	onsemi	24V	26.7V	38.9V	15.4A	600W	-65°C ~ 150°C	Bulk	Active

Engineering Selection Recommendations

Primary Substitutes (Identical Specifications)

SMBJ24CA-E3/5B and SMBJ24CA-E3/52 are direct Vishay equivalents with identical electrical parameters and operating temperature range. Both are active products with higher inventory availability (5320 and 3051 units respectively) compared to the primary part. These are the preferred substitutes when Vishay sourcing is required.

Cross-Manufacturer Alternatives

SMBJ24CA-13-F (Diodes Incorporated), SMBJ24CA-TP (Micro Commercial Co), and 1SMB24CA TR13 PBFREE (Central Semiconductor Corp) meet all core electrical specifications. SMBJ24CA-TP offers an extended upper operating temperature of 175°C. All three are active products with substantial inventory levels.

Automotive-Qualified Options

SMBJ24CAHE3/52 and SZ1SMB24CAT3G carry AEC-Q101 automotive qualification. SMBJ24CAHE3/52 is discontinued at DiGi Electronics but remains available through other channels. SZ1SMB24CAT3G is actively produced by onsemi with automotive-grade certification.

Specification Variant

SMBJ24CD-M3/I is a Vishay variant with marginally different clamping voltage (38.4V vs 38.9V) and slightly higher peak pulse current (15.6A vs 15.4A). This part is suitable for applications where the tighter clamping specification is beneficial.

Generic Alternative

SMBJ24CA (MDD) is a base part number variant with 210,110 units in stock. Operating temperature range is -50°C to 150°C, which is narrower than the primary part. This option is suitable for applications not requiring the full -55°C lower temperature specification.

Frequently Asked Questions (FAQ)

Q: Can SMBJ24CA-E3/5B be used as a direct replacement for SMBJ24CA-M3/5B?

A: Yes. Both parts are manufactured by Vishay with identical electrical specifications: 24V reverse standoff voltage, 26.7V minimum breakdown voltage, 38.9V maximum clamping voltage, and 15.4A peak pulse current. The difference in part number suffix (E3/5B vs M3/5B) reflects manufacturing date codes and packaging reel specifications, not functional differences.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® packaging?

A: Tape & Reel (TR) packaging supplies components on continuous reels suitable for high-volume automated assembly. Cut Tape (CT) & Digi-Reel® packaging provides smaller quantities cut from the reel, typically for lower-volume applications or prototyping. Electrical performance is identical; the difference is in supply format and minimum order quantities.

Q: Is SMBJ24CA-TP compatible with applications requiring -55°C operation?

A: Yes. SMBJ24CA-TP operates from -55°C to 175°C, which exceeds the -55°C lower temperature requirement of the primary part. The extended upper temperature range to 175°C provides additional thermal margin for high-dissipation applications.

Q: Can automotive-qualified parts (SMBJ24CAHE3/52 or SZ1SMB24CAT3G) be used in non-automotive applications?

A: Yes. Automotive-qualified parts meet or exceed the electrical and reliability specifications required for general-purpose applications. AEC-Q101 qualification indicates enhanced quality and reliability testing. These parts are suitable for any application requiring the specified electrical parameters.

Q: What is the significance of the ROHS3 compliance marking?

A: ROHS3 compliance indicates the part meets the Restriction of Hazardous Substances Directive 3, confirming the absence of lead, cadmium, mercury, hexavalent chromium, and specified brominated flame retardants. All listed substitutes carry ROHS3 compliance, ensuring environmental and regulatory compatibility.

Q: Is the MDD SMBJ24CA suitable for applications requiring the full -55°C to 150°C temperature range?

A: The MDD SMBJ24CA operates from -50°C to 150°C, which does not include the full -55°C lower specification. This part is suitable only for applications with a minimum operating temperature of -50°C or higher. For applications requiring -55°C operation, select alternatives with -55°C or lower minimum temperature ratings.

Q: What is the difference between the SMBJ24CD-M3/I and SMBJ24CA-M3/5B?

A: Both parts share the same 24V reverse standoff voltage and 600W peak pulse power rating. The SMBJ24CD-M3/I has a slightly lower clamping voltage (38.4V vs 38.9V) and marginally higher peak pulse current (15.6A vs 15.4A). The CD variant provides tighter voltage clamping, which may be beneficial in applications requiring lower transient voltage peaks.

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