SMBG15HE3/52 Equivalent & Substitute Parts

Part Overview

The SMBG15HE3/52 is a unidirectional Transient Voltage Suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, designed for transient overvoltage protection in surface mount applications. This component features a 15V reverse standoff voltage with a 26.9V maximum clamping voltage and 22.3A peak pulse current capability in the DO-215AA (SMB) package format. The part is qualified to AEC-Q101 automotive standards and is ROHS3 compliant. Due to the product's obsolete status, identifying functionally equivalent active alternatives is necessary to ensure design continuity and supply chain reliability.

Substiute Parts

SMBG15HE3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 916SMBG15HE3/52 Datasheet

Current PartRFQ

SMBG15AHE3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 846SMBG15AHE3/52 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMBG15HE3/52 is determined by the following critical parameters:

• Voltage - Reverse Standoff: Must be 15V (identical)
• Voltage - Breakdown (Min): Must be 16.7V (identical)
• Package / Case: Must be DO-215AA, SMB Gull Wing (identical)
• Unidirectional Channels: Must be 1 (identical)
• Operating Temperature Range: Must support -55°C ~ 150°C (identical)
• Automotive Grade: Must maintain AEC-Q101 qualification
• RoHS Compliance: Must be ROHS3 compliant

The SMBG15AHE3/52 qualifies as a direct substitute based on matching all critical electrical and mechanical parameters. While the clamping voltage (24.4V vs. 26.9V) and peak pulse current (24.6A vs. 22.3A) differ slightly, these variations remain within the functional tolerance band for the 15V standoff voltage class and do not compromise circuit protection performance.

Parameter Comparison

Engineering Selection Recommendations

The SMBG15AHE3/52 is the recommended substitute for the obsolete SMBG15HE3/52. Selection is based on the following engineering criteria:

• Both components maintain identical reverse standoff voltage (15V) and breakdown voltage (16.7V), ensuring equivalent circuit protection thresholds.
• Both are qualified to AEC-Q101 automotive standards, meeting the same reliability and qualification requirements.
• Both maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements.
• The substitute part is in active production status, ensuring long-term supply chain availability.
• Identical package format (DO-215AA, SMB Gull Wing) and mounting type (Surface Mount) enable direct PCB compatibility without layout modifications.
• Identical operating temperature range (-55°C ~ 150°C) maintains thermal performance specifications.
• The substitute's lower clamping voltage (24.4V vs. 26.9V) and higher peak pulse current (24.6A vs. 22.3A) represent improved performance characteristics within the same voltage class, providing enhanced transient suppression capability.

Frequently Asked Questions (FAQ)

Q: Can SMBG15AHE3/52 be used as a direct replacement for SMBG15HE3/52 without circuit redesign?

A: Yes. Both components share identical reverse standoff voltage, breakdown voltage, package format, and operating temperature range. No circuit redesign is required. Direct PCB substitution is possible.

Q: Why does the clamping voltage differ between the main part and substitute?

A: The SMBG15AHE3/52 exhibits a lower maximum clamping voltage (24.4V vs. 26.9V) while maintaining the same 15V reverse standoff specification. This represents a tighter clamping characteristic within the same voltage class and does not compromise protection performance.

Q: Are there any compliance or certification differences?

A: No. Both components are AEC-Q101 qualified, ROHS3 compliant, and REACH unaffected. Regulatory and automotive qualification requirements are identical.

Q: What is the significance of the product status difference?

A: The main part (SMBG15HE3/52) is obsolete, meaning it is no longer manufactured and supply is limited to existing inventory. The substitute (SMBG15AHE3/52) is in active production, ensuring reliable long-term availability for new designs and production runs.

Q: Is the packaging format identical?

A: Yes. Both components use the DO-215AA (SMB Gull Wing) surface mount package. Footprint, lead spacing, and mounting requirements are identical, enabling direct PCB compatibility.

Q: What is the difference between the tape & reel packaging of the substitute?

A: The SMBG15AHE3/52 is supplied in Tape & Reel (TR) format, which is standard for high-volume surface mount assembly. This packaging format is compatible with automated pick-and-place equipment and does not affect electrical performance or PCB compatibility.