GL15T-HG3-18 Equivalent & Substitute Parts

Part Overview

The GL15T-HG3-18 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is designed for surface mount applications in SOT-23-3 packaging, providing transient voltage protection with a 15V reverse standoff voltage and 33V clamping voltage at peak pulse current. The part is currently classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

GL15T-HG3-18

Vishay General Semiconductor - Diodes DivisionIn Stock: 776GL15T-HG3-18 Datasheet

Current PartRFQ

PESD15VU1UT,215

Nexperia USA Inc.In Stock: 8461PESD15VU1UT,215 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the GL15T-HG3-18 is determined by the following critical electrical and mechanical parameters:

• Reverse Standoff Voltage: Must match 15V (Max) to maintain circuit protection thresholds
• Peak Pulse Current Rating: Must support 5A (8/20µs) to handle transient events
• Package Compatibility: Must be compatible with TO-236-3 / SOT-23-3 footprint for direct board-level replacement
• Unidirectional Configuration: Single channel protection requirement
• Surface Mount Technology: Required for automated assembly compatibility

The PESD15VU1UT,215 from Nexperia USA Inc. meets these substitution criteria while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

The PESD15VU1UT,215 is qualified as a direct substitute for the GL15T-HG3-18 based on the following engineering criteria:

Electrical Compatibility: Both devices maintain identical reverse standoff voltage (15V Max) and peak pulse current rating (5A at 8/20µs), ensuring equivalent circuit protection performance in the primary application window.

Package Equivalence: Both components utilize TO-236-3 / SOT-23-3 surface mount packaging, enabling direct PCB footprint compatibility without layout modifications.

Compliance & Certification: Both parts are ROHS3 compliant and carry equivalent environmental qualification status. The PESD15VU1UT,215 maintains active product status with established supply chain availability, addressing the obsolescence constraint of the GL15T-HG3-18.

Parameter Deviations: The PESD15VU1UT,215 exhibits a higher clamping voltage (53V vs. 33V) and lower peak pulse power rating (200W vs. 300W). These differences require circuit-level validation to confirm suitability for the specific application. The lower capacitance (0.6pF vs. 2.5pF) may provide improved high-frequency performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can the PESD15VU1UT,215 be used as a direct replacement for GL15T-HG3-18 without PCB modifications?

A: Yes. Both devices share identical TO-236-3 / SOT-23-3 packaging and pin configuration, allowing direct footprint substitution without layout changes.

Q: What is the significance of the higher clamping voltage in the PESD15VU1UT,215?

A: The PESD15VU1UT,215 clamps at 53V compared to 33V for the GL15T-HG3-18. This higher clamp voltage may affect transient suppression characteristics. Circuit validation is required to confirm this parameter does not exceed downstream component voltage ratings.

Q: Are there temperature operating range differences between these parts?

A: The PESD15VU1UT,215 extends the lower operating temperature limit to -65°C (vs. -55°C for GL15T-HG3-18), providing broader thermal coverage. Both maintain 150°C upper limits.

Q: How do the capacitance differences impact circuit performance?

A: The PESD15VU1UT,215 exhibits significantly lower capacitance (0.6pF vs. 2.5pF at 1MHz). In high-frequency applications, lower capacitance may reduce signal distortion and improve impedance characteristics.

Q: Is the lower peak pulse power rating of the PESD15VU1UT,215 a concern?

A: The PESD15VU1UT,215 is rated at 200W peak pulse power versus 300W for the GL15T-HG3-18. Application-specific transient energy levels must be evaluated to ensure the substitute part can handle the expected surge conditions.

Q: What is the availability status difference between these parts?

A: The GL15T-HG3-18 is obsolete with limited stock. The PESD15VU1UT,215 is an active product with established supply chain availability, making it the preferred choice for new designs and ongoing procurement.