SMBG15-E3/5B Equivalent & Substitute Parts

Part Overview

The SMBG15-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

SMBG15-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 873SMBG15-E3/5B Datasheet

Current PartRFQ

SMBG15A-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 1041SMBG15A-E3/5B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SMBG15-E3/5B is determined by the following critical parameters:

• Reverse standoff voltage of 15V
• Breakdown voltage minimum of 16.7V
• DO-215AA (SMB) package configuration
• Surface mount capability
• Unidirectional channel configuration
• Operating temperature range of -55°C to 150°C
• RoHS3 compliance and MSL Level 1 rating

The SMBG15A-E3/5B qualifies as a direct substitute based on matching all these core electrical and mechanical specifications. While the clamping voltage and peak pulse current differ slightly, both parameters remain within the functional tolerance for general-purpose TVS applications in this voltage class.

Parameter Comparison

Engineering Selection Recommendations

The SMBG15A-E3/5B is the primary substitute for the obsolete SMBG15-E3/5B. Both components share identical reverse standoff voltage, breakdown voltage, operating temperature range, package configuration, and compliance certifications. The SMBG15A-E3/5B maintains active product status with Vishay, ensuring continued availability and manufacturing support.

Selection between these parts should be based on application requirements for clamping voltage and peak pulse current specifications. The SMBG15A-E3/5B provides a lower maximum clamping voltage (24.4V versus 26.9V) and higher peak pulse current capability (24.6A versus 22.3A), making it suitable for applications requiring tighter voltage regulation or higher transient current handling within the 15V standoff class.

Both components maintain ROHS3 compliance and MSL Level 1 rating, supporting standard surface mount assembly processes without moisture sensitivity constraints.

Frequently Asked Questions (FAQ)

Q: Can SMBG15A-E3/5B directly replace SMBG15-E3/5B in existing designs?

A: Yes. Both components share the same reverse standoff voltage (15V), breakdown voltage (16.7V minimum), operating temperature range (-55°C to 150°C), and DO-215AA package configuration. The differences in clamping voltage and peak pulse current are within the functional tolerance for general-purpose TVS applications in this voltage class.

Q: What is the significance of the different clamping voltages?

A: The SMBG15-E3/5B specifies a maximum clamping voltage of 26.9V, while the SMBG15A-E3/5B specifies 24.4V. Lower clamping voltage provides tighter voltage regulation during transient events. Selection depends on the specific protection requirements of the circuit being protected.

Q: Are there packaging differences between these parts?

A: No. Both components use the DO-215AA (SMB Gull Wing) surface mount package. They are mechanically and electrically compatible for PCB assembly.

Q: Why is SMBG15-E3/5B listed as obsolete?

A: Product obsolescence is determined by the manufacturer. The SMBG15A-E3/5B is the active equivalent and recommended for new designs and ongoing procurement.

Q: Do both parts meet the same compliance standards?

A: Yes. Both components are ROHS3 compliant with MSL Level 1 rating, supporting standard surface mount assembly without moisture sensitivity constraints.