SMBJ70CD-M3/I Equivalent & Substitute Parts

Part Overview

The SMBJ70CD-M3/I is a Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, part of the TransZorb® series. This surface-mount component operates as a bidirectional Zener diode in the DO-214AA (SMB) package, designed for general-purpose transient voltage suppression applications. The part is currently in active production status with 1075 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

SMBJ70CD-M3/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1117SMBJ70CD-M3/I Datasheet

Current PartRFQ

SMBJ70CA-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 1413SMBJ70CA-E3/5B Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ70CD-M3/I is determined by strict equivalence in the following electrical and mechanical parameters:

• Reverse Standoff Voltage: 70V (nominal)
• Package / Case: DO-214AA (SMB) surface mount
• Bidirectional Zener diode topology
• Operating temperature range: -55°C to 150°C
• RoHS3 compliance and MSL Level 1 rating

The substitute part SMBJ70CA-E3/5B meets all these criteria. Variations in clamping voltage (111V vs. 113V) and peak pulse current (5.4A vs. 5.3A) remain within the functional tolerance band for the 70V standoff voltage class and do not disqualify substitution in general-purpose transient suppression applications.

Parameter Comparison

Engineering Selection Recommendations

Both the SMBJ70CD-M3/I and SMBJ70CA-E3/5B are active production components with ROHS3 compliance and MSL Level 1 rating, meeting regulatory and environmental requirements for industrial and commercial applications. The SMBJ70CA-E3/5B offers higher inventory availability (1390 units vs. 1075 units) and is the manufacturer-recommended substitute. Selection between these parts should be based on procurement lead time, inventory position, and application-specific clamping voltage tolerance requirements. Both parts are functionally equivalent for general-purpose transient voltage suppression in the 70V standoff voltage class.

Frequently Asked Questions (FAQ)

Q: Can SMBJ70CA-E3/5B replace SMBJ70CD-M3/I in existing designs?

A: Yes. Both parts share identical reverse standoff voltage (70V), package (DO-214AA/SMB), mounting type (surface mount), operating temperature range (-55°C to 150°C), and compliance ratings (ROHS3, MSL 1). Clamping voltage and peak pulse current variations (111V/5.4A vs. 113V/5.3A) are within the functional tolerance band for the 70V class.

Q: Are there mechanical compatibility concerns?

A: No. Both parts use the DO-214AA (SMB) surface-mount package with identical footprint and land pattern requirements. PCB layout and reflow soldering parameters remain unchanged.

Q: What is the difference between the two part numbers?

A: The SMBJ70CD-M3/I and SMBJ70CA-E3/5B are distinct manufacturing variants within the TransZorb® 70V TVS diode family. Differences in clamping voltage (111V vs. 113V) and peak pulse current (5.4A vs. 5.3A) reflect manufacturing process variations and do not affect functional equivalence for general-purpose applications.

Q: Are both parts RoHS compliant?

A: Yes. Both SMBJ70CD-M3/I and SMBJ70CA-E3/5B are ROHS3 compliant with MSL Level 1 (unlimited moisture sensitivity), suitable for standard PCB assembly and storage conditions.

Q: Which part should be selected for new designs?

A: Selection should be based on procurement availability and lead time. The SMBJ70CA-E3/5B is the manufacturer-recommended substitute with higher current inventory levels. Both parts are functionally equivalent and suitable for new designs requiring 70V standoff voltage transient suppression.