GSOT03-HT3-GS08 Equivalent & Substitute Parts

Part Overview

The GSOT03-HT3-GS08 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is designed for surface mount applications in the LLP75-3B package, providing 3.3V reverse standoff voltage with 12.3V maximum clamping voltage at peak pulse current of 30A (8/20µs). The part is currently listed as obsolete, making identification of active equivalent substitutes essential for ongoing design support and procurement.

Substiute Parts

GSOT03-HT3-GS08

Vishay General Semiconductor - Diodes DivisionIn Stock: 765GSOT03-HT3-GS08 Datasheet

Current PartRFQ

GSOT03-E3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 10365GSOT03-E3-08 Datasheet

MFR RecommendedRFQ

1N4728 G

Microsemi CorporationIn Stock: 8171N4728 G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the GSOT03-HT3-GS08 is determined by the following critical electrical and mechanical parameters:

Electrical Matching Criteria:

• Voltage - Reverse Standoff: 3.3V nominal
• Voltage - Clamping (Max) @ Ipp: 12.3V
• Current - Peak Pulse: 30A (8/20µs)
• Power - Peak Pulse: 369W
• Unidirectional channel configuration

Mechanical Compatibility:

• Surface mount technology requirement
• Package form factor compatibility with circuit board layout

Compliance Requirements:

• RoHS3 compliance
• Operating temperature range: -40°C ~ 125°C

The GSOT03-E3-08 is the manufacturer-recommended direct substitute, maintaining identical electrical specifications while transitioning to an active product status with SOT-23-3 packaging. The 1N4728 G represents an alternative zener diode option with matching 3.3V nominal voltage but operates under different mechanical and thermal constraints due to through-hole packaging and reduced power rating.

Parameter Comparison

Engineering Selection Recommendations

GSOT03-E3-08 (Primary Substitute): This is the manufacturer-recommended replacement for the obsolete GSOT03-HT3-GS08. Both components share identical electrical performance specifications, including voltage clamping, peak pulse current, and power dissipation. The GSOT03-E3-08 maintains ROHS3 compliance and AEC-Q101 qualification. The transition from LLP75-3B to SOT-23-3 packaging requires PCB layout modification but provides superior long-term availability with 10,270 units in stock versus 755 units for the obsolete part. This substitute is suitable for direct replacement in new designs and redesigns of existing applications.

1N4728 G (Alternative Option): The 1N4728 G is an active zener diode with matching 3.3V nominal voltage but operates under significantly different electrical and mechanical constraints. The 1W power rating is substantially lower than the 369W peak pulse power of the main part, making this component unsuitable for high-energy transient suppression applications. The through-hole DO-204AL package requires different PCB footprints and assembly processes. Additionally, this part does not meet RoHS3 compliance requirements. Selection of the 1N4728 G is limited to applications with reduced power dissipation requirements and where through-hole mounting is preferred.

Frequently Asked Questions (FAQ)

Q: Can the GSOT03-E3-08 be used as a direct electrical replacement for the GSOT03-HT3-GS08?

A: Yes. Both components are manufactured by Vishay and share identical electrical specifications: 3.3V reverse standoff voltage, 12.3V maximum clamping voltage, 30A peak pulse current (8/20µs), and 369W peak pulse power. The GSOT03-E3-08 is the manufacturer-recommended substitute for the obsolete GSOT03-HT3-GS08.

Q: What is the primary difference between GSOT03-HT3-GS08 and GSOT03-E3-08?

A: The primary difference is packaging and product status. The GSOT03-HT3-GS08 uses LLP75-3B packaging and is obsolete. The GSOT03-E3-08 uses SOT-23-3 packaging and maintains active product status with significantly higher inventory availability. Electrical performance is identical.

Q: Is the 1N4728 G suitable for replacing the GSOT03-HT3-GS08?

A: The 1N4728 G is not a suitable replacement for high-energy transient suppression applications. While both components have 3.3V nominal voltage, the 1N4728 G is rated for only 1W power dissipation compared to 369W for the GSOT03-HT3-GS08. Additionally, the 1N4728 G does not meet RoHS3 compliance and uses through-hole packaging incompatible with surface mount designs.

Q: What PCB layout changes are required when switching from GSOT03-HT3-GS08 to GSOT03-E3-08?

A: The transition from LLP75-3B (3-WDFN) to SOT-23-3 (TO-236-3) packaging requires modification of the component footprint on the PCB. Both are surface mount packages with three leads, but the physical dimensions and lead spacing differ. Consult the respective datasheets for precise footprint specifications.

Q: Are both GSOT03-HT3-GS08 and GSOT03-E3-08 qualified for automotive applications?

A: The GSOT03-HT3-GS08 carries AEC-Q101 qualification. The GSOT03-E3-08 datasheet specifications do not explicitly list AEC-Q101 qualification in the provided parameters. Verify automotive qualification status with the manufacturer before selecting for automotive applications.

Q: What is the operating temperature range for each part?

A: Both GSOT03-HT3-GS08 and GSOT03-E3-08 operate from -40°C to 125°C (junction temperature). The 1N4728 G operates over a wider range of -65°C to 175°C, but this extended range is not relevant for applications designed around the 3.3V TVS diode specifications.