SMBJ70CA-M3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ70CA-M3/52 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 provides transient overvoltage protection for general-purpose applications. The part is Active status and RoHS3 compliant. Equivalent and substitute parts are identified based on matching electrical performance parameters and mechanical compatibility within the SMBJ70 base product family.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	70V
Voltage - Breakdown (Min)	77.8V
Voltage - Clamping (Max) @ Ipp	113V
Current - Peak Pulse (10/1000µs)	5.3A
Power - Peak Pulse	600W
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
Operating Temperature Range	-55°C ~ 150°C (TJ)
Type	Zener
Bidirectional Channels	1

Substitute Part Grouping Explanation

Substitute parts for the SMBJ70CA-M3/52 are qualified based on the following criteria:

Critical Matching Parameters:

Voltage - Reverse Standoff (Typ): 70V
Voltage - Clamping (Max) @ Ipp: 113V (±2V tolerance acceptable)
Current - Peak Pulse (10/1000µs): 5.3A (±0.2A tolerance acceptable)
Power - Peak Pulse: 600W
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
Bidirectional Channels: 1
Type: Zener

Parts are grouped as direct substitutes when all critical electrical parameters fall within acceptable tolerances and the mechanical package is identical. Manufacturer variations and packaging formats (Tape & Reel, Cut Tape) do not affect electrical interchangeability.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Package	Status
SMBJ70CA-M3/52	Vishay General Semiconductor - Diodes Division	70V	113V	5.3A	600W	-55°C ~ 150°C	DO-214AA, SMB	Active
SMBJ70CD-M3/H	Vishay General Semiconductor - Diodes Division	70V	111V	5.4A	600W	-55°C ~ 150°C	DO-214AA, SMB	Active
SMBJ70CA-E3/52	Vishay General Semiconductor - Diodes Division	70V	113V	5.3A	600W	-55°C ~ 150°C	DO-214AA, SMB	Active
SMBJ70CA	Semtech Corporation	70V	113V	5.3A	600W	-55°C ~ 175°C	DO-214AA, SMB	Active
SMBJ70CA-13-F	Diodes Incorporated	70V	113V	5.3A	600W	-55°C ~ 150°C	DO-214AA, SMB	Active
SMBJ70CA-TP	Micro Commercial Co	70V	113V	5.3A	600W	-55°C ~ 175°C	DO-214AA, SMB	Active
SMBJ70CA-TR	STMicroelectronics	70V	113V	5.5A	600W	-55°C ~ 150°C	DO-214AA, SMB	Active

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and RoHS3 compliance, ensuring regulatory alignment with the original SMBJ70CA-M3/52. Selection among substitutes depends on application-specific requirements:

Electrical Performance: SMBJ70CA-E3/52, SMBJ70CA (Semtech), SMBJ70CA-13-F, and SMBJ70CA-TP provide identical clamping voltage (113V) and peak pulse current (5.3A) specifications. SMBJ70CA-TR (STMicroelectronics) delivers marginally higher peak pulse current (5.5A) while maintaining the same clamping voltage. SMBJ70CD-M3/H presents a 2V lower clamping voltage (111V) with 0.1A higher peak pulse current (5.4A).

Temperature Range: Semtech SMBJ70CA and Micro Commercial Co SMBJ70CA-TP support extended operating temperature to 175°C, compared to 150°C for Vishay and Diodes Incorporated variants. This extended range accommodates higher ambient or junction temperature environments.

Packaging Format: All parts are available in Tape & Reel (TR) or equivalent automated assembly formats. Micro Commercial Co SMBJ70CA-TP is supplied in Cut Tape (CT) & Digi-Reel format, suitable for lower-volume or mixed-component assembly workflows.

Manufacturer Continuity: Vishay SMBJ70CA-E3/52 maintains identical specifications and temperature range to the original part, providing direct substitution without design modification.

Frequently Asked Questions (FAQ)

Q: Can SMBJ70CD-M3/H replace SMBJ70CA-M3/52 in all applications?

A: SMBJ70CD-M3/H is electrically compatible for most applications. The 2V lower clamping voltage (111V vs. 113V) and 0.1A higher peak pulse current (5.4A vs. 5.3A) fall within acceptable tolerance ranges for general-purpose transient suppression. Verify application-specific clamping voltage requirements before substitution.

Q: What is the difference between packaging designations like -M3/52, -E3/52, and -TR?

A: These designations indicate packaging and tape format specifications. -M3/52 and -E3/52 refer to specific tape reel configurations per Vishay standards. -TR indicates standard Tape & Reel format. All variants use identical DO-214AA (SMB) mechanical packages and are interchangeable at the PCB level.

Q: Are all substitute parts RoHS3 compliant?

A: All listed substitute parts maintain RoHS3 compliance status, ensuring compatibility with regulatory requirements for lead-free assembly and restricted substance limitations.

Q: Which substitute offers the best thermal performance?

A: Semtech SMBJ70CA and Micro Commercial Co SMBJ70CA-TP support operating temperatures to 175°C, providing 25°C additional thermal margin compared to other variants rated to 150°C. This extended range is beneficial for high-temperature environments or applications with elevated junction temperatures.

Q: Can I use SMBJ70CA-TR (STMicroelectronics) if my design specifies 5.3A peak pulse current?

A: SMBJ70CA-TR delivers 5.5A peak pulse current, which exceeds the 5.3A specification. This higher current capability provides additional transient suppression margin and is functionally compatible. No design modification is required.

Q: Are there inventory or lead time considerations for substitute selection?

A: Inventory levels vary by manufacturer and distributor. Semtech SMBJ70CA maintains the highest stock level (10,200 pcs), while STMicroelectronics SMBJ70CA-TR and Micro Commercial Co SMBJ70CA-TP offer substantial availability (5,875 and 9,893 pcs respectively). Consult your component supplier for current lead times and allocation status.

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