GL24T-HG3-08 Equivalent & Substitute Parts

Part Overview

The GL24T-HG3-08 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 SOT-23-3 package, providing 24V reverse standoff voltage protection with a 55V maximum clamping voltage. The part is currently classified as obsolete, making identification of equivalent and substitute components essential for ongoing design support and production continuity.

Substiute Parts

GL24T-HG3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 987GL24T-HG3-08 Datasheet

Current PartRFQ

SL24.TCT

Semtech CorporationIn Stock: 71415SL24.TCT Datasheet

DirectRFQ

PESD24VU1UT,215

Nexperia USA Inc.In Stock: 15356PESD24VU1UT,215 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of TVS diodes is determined by the following critical parameters:

• Voltage Rating Compatibility: Reverse standoff voltage and breakdown voltage must match or exceed the original specification to maintain circuit protection integrity.
• Clamping Voltage: Maximum clamping voltage at peak pulse current determines the maximum transient voltage the protected circuit will experience.
• Peak Pulse Current: The diode must handle the specified peak pulse current without degradation.
• Power Dissipation: Peak pulse power rating must support the application's transient energy requirements.
• Package Compatibility: Physical form factor and pin configuration must be identical for direct PCB replacement.
• Operating Temperature Range: Must encompass the application's thermal requirements.
• Compliance & Certification: RoHS and automotive qualifications must align with application requirements.

The GL24T-HG3-08 has been identified with two substitute options based on these parameters.

Parameter Comparison

Engineering Selection Recommendations

SL24.TCT (Semtech Corporation) provides the closest electrical match to the GL24T-HG3-08. This part maintains identical voltage ratings (24V standoff, 26.7V breakdown, 55V clamping) and peak pulse current (5A), with equivalent power dissipation (300W). The operating temperature range is slightly reduced to -55°C ~ 125°C, which may be acceptable depending on application requirements. This substitute is currently in active production with substantial inventory availability (71,400 pcs).

PESD24VU1UT,215 (Nexperia USA Inc.) is an alternative substitute with the same 24V standoff voltage but differs in critical parameters. The clamping voltage is higher at 76V, and peak pulse current is reduced to 3A with corresponding power dissipation of 200W. This part carries automotive grade certification (AEC-Q100) and supports the full operating temperature range of the original (-65°C ~ 150°C). Selection of this substitute requires verification that the higher clamping voltage and reduced peak pulse current are acceptable for the specific application circuit.

Both substitutes are ROHS3 compliant and available in the identical SOT-23-3 package, enabling direct PCB replacement without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can SL24.TCT be used as a direct replacement for GL24T-HG3-08?

A: SL24.TCT is electrically compatible for applications where the operating temperature range of -55°C ~ 125°C is acceptable. The voltage ratings and peak pulse current are identical. Verify that your application does not require operation above 125°C junction temperature.

Q: What is the key difference between SL24.TCT and PESD24VU1UT,215?

A: SL24.TCT matches the original clamping voltage (55V) and peak pulse current (5A). PESD24VU1UT,215 has a higher clamping voltage (76V) and lower peak pulse current (3A). The choice depends on whether your circuit can tolerate the higher clamping voltage and whether the reduced current handling is sufficient.

Q: Are both substitutes available in the same package as the GL24T-HG3-08?

A: Yes. Both SL24.TCT and PESD24VU1UT,215 are available in the TO-236-3/SOT-23-3 package, identical to the original part. No PCB layout changes are required for either substitute.

Q: Which substitute should I choose for automotive applications?

A: Both SL24.TCT and PESD24VU1UT,215 are suitable for automotive use. PESD24VU1UT,215 carries AEC-Q100 qualification. SL24.TCT does not specify automotive qualification in the provided data. Verify your specific automotive qualification requirements before final selection.

Q: What is the impact of the higher clamping voltage in PESD24VU1UT,215?

A: The 76V clamping voltage (versus 55V in the original) means transient voltages will be allowed to reach a higher level before being suppressed. This is acceptable only if the protected circuit components can withstand this higher voltage without damage. Review your circuit's voltage tolerance specifications.

Q: Can I use PESD24VU1UT,215 if my application requires 5A peak pulse current?

A: No. PESD24VU1UT,215 is rated for 3A peak pulse current. If your application requires 5A handling capability, use SL24.TCT instead, which maintains the 5A rating of the original GL24T-HG3-08.