SMBG45C-E3/5B Equivalent & Substitute Parts

Part Overview

The SMBG45C-E3/5B is a Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, part of the TransZorb® series. This surface-mount component is designed for general-purpose transient voltage suppression applications with a 45V reverse standoff voltage rating and 80.3V maximum clamping voltage. The device is currently classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

SMBG45C-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 997SMBG45C-E3/5B Datasheet

Current PartRFQ

SMBG45CA-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 891SMBG45CA-E3/5B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMBG45C-E3/5B is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Reverse standoff voltage: 45V (typical)
• Breakdown voltage minimum: 50V
• Package type: DO-215AA, SMB Gull Wing
• Mounting type: Surface Mount
• Bidirectional channels: 1
• Operating temperature range: -55°C ~ 150°C (TJ)
• RoHS and REACH compliance status

Allowable Variation Parameters:

• Clamping voltage (maximum @ Ipp): Permitted to vary within the same voltage class
• Peak pulse current (10/1000µs): Permitted to vary while maintaining 600W peak pulse power rating
• Product status: Active status preferred over obsolete for long-term availability

The SMBG45CA-E3/5B qualifies as a direct substitute based on identical reverse standoff voltage, breakdown voltage, package configuration, and compliance certifications, with acceptable variations in clamping voltage and peak pulse current characteristics.

Parameter Comparison

Engineering Selection Recommendations

The SMBG45CA-E3/5B is the qualified substitute for the obsolete SMBG45C-E3/5B. Both components maintain identical voltage specifications (45V reverse standoff, 50V minimum breakdown) and package configuration (DO-215AA, SMB Gull Wing surface mount). The substitute exhibits a lower maximum clamping voltage (72.7V versus 80.3V) and higher peak pulse current capability (8.3A versus 7.5A), while maintaining the same 600W peak pulse power rating.

Both parts are ROHS3 compliant and REACH unaffected, ensuring regulatory alignment for current and future applications. The SMBG45CA-E3/5B carries active product status, providing superior long-term availability and supply chain continuity compared to the obsolete main part number.

Frequently Asked Questions (FAQ)

Q: Can the SMBG45CA-E3/5B be used as a direct replacement for the SMBG45C-E3/5B?

A: Yes. Both components share identical reverse standoff voltage (45V), breakdown voltage (50V minimum), package type (DO-215AA, SMB Gull Wing), and operating temperature range (-55°C ~ 150°C). The substitute is electrically and mechanically compatible for general-purpose transient voltage suppression applications.

Q: What are the differences between these two part numbers?

A: The primary differences are clamping voltage and peak pulse current. The SMBG45C-E3/5B clamps at a maximum of 80.3V with 7.5A peak pulse current, while the SMBG45CA-E3/5B clamps at 72.7V with 8.3A peak pulse current. Both maintain 600W peak pulse power rating. The substitute also carries active product status versus obsolete status for the main part.

Q: Are there any package or mounting differences?

A: No. Both components use the DO-215AA package with SMB Gull Wing configuration and are surface-mount devices. PCB layout and assembly processes remain unchanged.

Q: What compliance certifications apply to both parts?

A: Both the SMBG45C-E3/5B and SMBG45CA-E3/5B are ROHS3 compliant and REACH unaffected. Moisture sensitivity level is 1 (unlimited) for both components.

Q: Why is the SMBG45C-E3/5B classified as obsolete?

A: Product obsolescence is determined by manufacturer lifecycle decisions. The SMBG45CA-E3/5B, as an active product within the same TransZorb® series, provides continued design support and procurement availability.