SMBG18CA-M3/52 Equivalent & Substitute Parts

Part Overview

The SMBG18CA-M3/52 is a Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, part of the TransZorb® series. This surface-mount component provides transient overvoltage protection with an 18V reverse standoff voltage and 29.2V maximum clamping voltage. The device is designed for general-purpose transient suppression applications requiring fast response to voltage spikes. As an active product with ROHS3 compliance and unlimited moisture sensitivity rating, substitute parts may be required due to inventory availability, lead time optimization, or specific packaging requirements in production environments.

Substiute Parts

SMBG18CA-M3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 816SMBG18CA-M3/52 Datasheet

Current PartRFQ

SMBG18CA-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 17776SMBG18CA-E3/52 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBG18CA-M3/52 is determined by electrical and mechanical parameter equivalence. The critical parameters defining substitutability are:

• Voltage - Reverse Standoff: 18V (typical)
• Voltage - Clamping (Max) @ Ipp: 29.2V
• Current - Peak Pulse: 20.5A
• Package / Case: DO-215AA, SMB Gull Wing
• Mounting Type: Surface Mount
• Base Product Number: SMBG18

The SMBG18CA-E3/52 meets all these electrical and mechanical requirements, maintaining identical voltage ratings, peak pulse current capacity, and package specifications. Both parts are manufactured by Vishay General Semiconductor - Diodes Division within the TransZorb® series and share the same base product designation (SMBG18).

Parameter Comparison

Engineering Selection Recommendations

The SMBG18CA-E3/52 is a direct electrical and mechanical equivalent to the SMBG18CA-M3/52. Both parts are active products with identical voltage suppression characteristics, peak pulse current ratings, and package specifications. Both maintain ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for industrial and commercial applications.

The primary difference is the operating temperature range: the SMBG18CA-M3/52 operates from -65°C to 175°C, while the SMBG18CA-E3/52 operates from -55°C to 150°C. Selection between these parts should be based on the specific thermal requirements of the application. For applications requiring the extended lower temperature limit of -65°C or the extended upper temperature limit of 175°C, the SMBG18CA-M3/52 is the appropriate choice. For applications within the -55°C to 150°C range, either part is suitable.

Frequently Asked Questions (FAQ)

Q: Can SMBG18CA-E3/52 be used as a direct replacement for SMBG18CA-M3/52?

A: The SMBG18CA-E3/52 is electrically and mechanically equivalent for applications operating within the temperature range of -55°C to 150°C. If your application requires operation below -55°C or above 150°C, the SMBG18CA-M3/52 with its extended temperature range of -65°C to 175°C is required.

Q: Are the package specifications identical between these parts?

A: Yes. Both parts use the DO-215AA package with SMB Gull Wing configuration and are surface-mount devices. They are mechanically interchangeable on PCBs designed for the SMBG18 footprint.

Q: Do both parts meet the same compliance standards?

A: Yes. Both SMBG18CA-M3/52 and SMBG18CA-E3/52 are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity ratings.

Q: What is the difference between the M3 and E3 designations?

A: The M3 and E3 designations indicate different temperature grade specifications. The M3 grade supports the extended temperature range of -65°C to 175°C, while the E3 grade operates from -55°C to 150°C. All other electrical and mechanical specifications remain identical.

Q: Are the voltage suppression characteristics the same?

A: Yes. Both parts provide identical transient voltage suppression with 18V reverse standoff voltage, 20V minimum breakdown voltage, 29.2V maximum clamping voltage, and 20.5A peak pulse current capacity.