SMBG45-E3/5B Equivalent & Substitute Parts

Part Overview

The SMBG45-E3/5B is a unidirectional Transient Voltage Suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, part of the TransZorb® series. This surface mount component is designed for general-purpose transient voltage suppression applications. The part is currently listed as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement.

Substiute Parts

SMBG45-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 827SMBG45-E3/5B Datasheet

Current PartRFQ

SMBG45A-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 810SMBG45A-E3/5B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBG45-E3/5B is determined by the following critical parameters:

• Reverse standoff voltage: 45V (Typ)
• Breakdown voltage minimum: 50V
• Package type: DO-215AA, SMB Gull Wing (surface mount)
• Unidirectional channel configuration: 1 channel
• Operating temperature range: -55°C ~ 150°C (TJ)
• Compliance certifications: ROHS3, REACH Unaffected

The SMBG45A-E3/5B qualifies as a direct substitute based on matching all critical electrical and mechanical parameters within the allowed tolerance specifications for this product category.

Parameter Comparison

Engineering Selection Recommendations

The SMBG45A-E3/5B is the direct substitute for the obsolete SMBG45-E3/5B. Both components share identical reverse standoff voltage (45V Typ), breakdown voltage minimum (50V), operating temperature range (-55°C ~ 150°C), and package configuration (DO-215AA, SMB Gull Wing surface mount).

The substitute part offers improved current handling capability (8.3A versus 7.5A peak pulse current) and lower clamping voltage (72.7V versus 80.3V), both of which provide enhanced performance characteristics. Both parts maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

The SMBG45A-E3/5B is currently in active production status, ensuring long-term availability and supply chain continuity compared to the obsolete main part number.

Frequently Asked Questions (FAQ)

Q: Can the SMBG45A-E3/5B be used as a direct replacement for the SMBG45-E3/5B?

A: Yes. Both components share identical reverse standoff voltage, breakdown voltage, operating temperature range, and package type. The substitute part is electrically and mechanically compatible for direct substitution.

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

A: The primary differences are clamping voltage (72.7V for SMBG45A-E3/5B versus 80.3V for SMBG45-E3/5B) and peak pulse current rating (8.3A versus 7.5A). The substitute part provides lower clamping voltage and higher current capacity. Product status differs: SMBG45-E3/5B is obsolete while SMBG45A-E3/5B is active.

Q: Are both parts available in the same package?

A: Yes. Both the SMBG45-E3/5B and SMBG45A-E3/5B use the DO-215AA (SMB Gull Wing) surface mount package, ensuring identical PCB footprint and assembly compatibility.

Q: Do both parts meet the same compliance standards?

A: Yes. Both components are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited moisture sensitivity level) ratings.

Q: Why should I transition from SMBG45-E3/5B to SMBG45A-E3/5B?

A: The SMBG45-E3/5B is obsolete. The SMBG45A-E3/5B is the active equivalent that provides continued supply availability, improved electrical performance (lower clamping voltage, higher current capacity), and long-term design support.