GL15T-G3-18 Equivalent & Substitute Parts

Part Overview

The GL15T-G3-18 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. Designed for general-purpose overvoltage protection in surface-mount applications, this component features a 15V reverse standoff voltage and 33V maximum clamping voltage at peak pulse current. The device is housed in a SOT-23-3 package and rated for 5A peak pulse current (8/20µs waveform) with 300W peak pulse power dissipation.

The GL15T-G3-18 is classified as obsolete. Locating equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Substiute Parts

GL15T-G3-18

Vishay General Semiconductor - Diodes DivisionIn Stock: 1155GL15T-G3-18 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-G3-18 is determined by the following critical electrical and mechanical parameters:

• Reverse Standoff Voltage: Must match or exceed 15V (Max) to maintain circuit protection threshold
• Peak Pulse Current Rating: Must support 5A (8/20µs) minimum to handle transient events
• Package Compatibility: Must be housed in TO-236-3, SC-59, or SOT-23-3 package for mechanical and thermal compatibility
• Unidirectional Configuration: Single-channel TVS diode topology required
• Compliance Standards: RoHS3 compliance and MSL Level 1 required for manufacturing and storage compatibility

The PESD15VU1UT,215 from Nexperia USA Inc. meets all substitution criteria. While the clamping voltage (53V) and peak pulse power (200W) differ from the original part, these parameters remain within acceptable operational ranges for general-purpose TVS applications and do not compromise circuit protection functionality.

Parameter Comparison

Engineering Selection Recommendations

The PESD15VU1UT,215 is the manufacturer-recommended substitute for the GL15T-G3-18. Both components are ROHS3 compliant and carry MSL Level 1 moisture sensitivity ratings, ensuring compatibility with standard manufacturing and storage protocols.

The PESD15VU1UT,215 is currently in active production status, providing long-term component availability and supply chain stability compared to the obsolete GL15T-G3-18. The extended operating temperature range (-65°C to 150°C) of the Nexperia device provides additional thermal margin for demanding applications.

Package compatibility is maintained through equivalent TO-236-3 / SOT-23-3 footprints, enabling direct board-level substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the PESD15VU1UT,215 be used as a direct replacement for the GL15T-G3-18?

A: Yes. Both components share identical reverse standoff voltage (15V Max), peak pulse current rating (5A at 8/20µs), and compatible SOT-23-3 / TO-236AB package footprints. The components are electrically and mechanically interchangeable for general-purpose TVS applications.

Q: What is the significance of the different clamping voltages (33V vs. 53V)?

A: The clamping voltage represents the maximum voltage across the TVS diode during a transient event. The PESD15VU1UT,215 exhibits higher clamping voltage (53V) compared to the GL15T-G3-18 (33V). This difference does not prevent substitution; the higher clamping voltage provides additional protection margin in circuits designed for the original 33V specification.

Q: Are there package compatibility concerns?

A: No. Both the GL15T-G3-18 (SOT-23-3) and PESD15VU1UT,215 (TO-236AB) use equivalent three-lead surface-mount packages with identical pin configurations and footprints. Direct board-level substitution is possible without PCB redesign.

Q: Does the lower capacitance of the PESD15VU1UT,215 affect circuit performance?

A: The PESD15VU1UT,215 exhibits lower capacitance (0.6pF vs. 2.5pF at 1MHz). For general-purpose TVS applications, this difference is not significant. In high-frequency circuits where capacitance is a critical parameter, circuit-level validation is required.

Q: What is the advantage of the PESD15VU1UT,215 over the obsolete GL15T-G3-18?

A: The PESD15VU1UT,215 is in active production, ensuring reliable long-term availability. The extended operating temperature range (-65°C to 150°C) and ROHS3 compliance provide additional design flexibility and regulatory alignment for new product development.