SMBG18C-E3/5B Equivalent & Substitute Parts

Part Overview

The SMBG18C-E3/5B is a transient voltage suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, designed for general-purpose overvoltage protection applications. This component features an 18V reverse standoff voltage with a 32.2V maximum clamping voltage and 18.6A peak pulse current capability in a surface-mount DO-215AA (SMB) package. The product is currently obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

SMBG18C-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 971SMBG18C-E3/5B Datasheet

Current PartRFQ

SMBG18CA-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 923SMBG18CA-E3/5B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBG18C-E3/5B is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff (Typ): 18V
• Voltage - Breakdown (Min): 20V
• Package / Case: DO-215AA, SMB Gull Wing
• Mounting Type: Surface Mount
• Bidirectional Channels: 1

Acceptable Variation Parameters:

• Voltage - Clamping (Max) @ Ipp: Must not exceed system requirements; lower values are acceptable
• Current - Peak Pulse (10/1000µs): Must meet or exceed circuit protection requirements
• Power - Peak Pulse: Must support the application's transient energy dissipation

The SMBG18CA-E3/5B qualifies as a direct substitute based on identical reverse standoff voltage, breakdown voltage, package type, and mounting configuration. The substitute exhibits improved peak pulse current capability (20.5A vs. 18.6A) and lower clamping voltage (29.2V vs. 32.2V), both favorable characteristics for overvoltage protection circuits.

Parameter Comparison

Engineering Selection Recommendations

The SMBG18CA-E3/5B is the qualified substitute for the obsolete SMBG18C-E3/5B. Both components are manufactured by Vishay General Semiconductor - Diodes Division within the TransZorb® series and maintain identical electrical specifications for reverse standoff voltage (18V) and breakdown voltage (20V). Both components are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings.

The substitute component offers active product status, ensuring continued availability and manufacturing support. The SMBG18CA-E3/5B provides enhanced performance characteristics with increased peak pulse current (20.5A vs. 18.6A) and reduced clamping voltage (29.2V vs. 32.2V), delivering superior transient suppression capability within the same thermal and mechanical envelope.

Frequently Asked Questions (FAQ)

Q: Can the SMBG18CA-E3/5B be used as a direct replacement for the SMBG18C-E3/5B?

A: Yes. Both components share identical reverse standoff voltage (18V), breakdown voltage (20V), package type (DO-215AA), and mounting configuration (surface mount). The substitute offers improved electrical performance with higher peak pulse current and lower clamping voltage.

Q: What are the key differences between these two parts?

A: The primary differences are product status (obsolete vs. active) and electrical performance. The SMBG18CA-E3/5B provides 20.5A peak pulse current compared to 18.6A in the original part, and achieves a lower maximum clamping voltage of 29.2V versus 32.2V. Both maintain identical thermal operating range and compliance certifications.

Q: Are there any packaging or mounting differences?

A: No. Both components use the DO-215AA (SMB Gull Wing) surface-mount package. The SMBG18CA-E3/5B is supplied in Tape & Reel (TR) packaging format, which is standard for production environments.

Q: What compliance certifications apply to the substitute part?

A: The SMBG18CA-E3/5B is ROHS3 compliant, REACH unaffected, and carries MSL 1 (Unlimited) moisture sensitivity rating, matching the original component's compliance profile.

Q: Is the substitute part suitable for the same temperature range?

A: Yes. Both components operate across the identical temperature range of -55°C to 150°C (TJ), ensuring thermal compatibility in all application environments.