TVS524 Equivalent & Substitute Parts

Part Overview

The TVS524 is a 24V unidirectional transient voltage suppressor (TVS) diode manufactured by Microchip Technology, featuring a 42V maximum clamping voltage and 11.9A peak pulse current capability in an axial through-hole package. This component is classified as an active product with RoHS non-compliant status and provides general-purpose transient protection in applications requiring suppression of voltage transients.

Alternative models are evaluated to provide options for circuit designers when the primary TVS524 is unavailable or when system requirements necessitate equivalent functionality with different packaging or compliance characteristics.

Substiute Parts

TVS524

Microchip TechnologyIn Stock: 900TVS524 Datasheet

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LDP24A

STMicroelectronicsIn Stock: 2774LDP24A Datasheet

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LDP24ARL

STMicroelectronicsIn Stock: 1675LDP24ARL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TVS524 are identified based on electrical parameter compatibility within acceptable engineering tolerances. The critical parameters for substitution are:

• Voltage - Reverse Standoff: Must match 24V to ensure proper circuit protection thresholds
• Voltage - Clamping (Max) @ Ipp: Must not exceed 42V to maintain clamping performance
• Current - Peak Pulse: Must be capable of handling transient currents; higher ratings are acceptable
• Mounting Type: Through hole configuration required for mechanical compatibility
• Unidirectional Channels: Single channel configuration required
• Type: Zener diode classification

The substitute parts LDP24A and LDP24ARL meet these electrical and mechanical criteria, with modifications in clamping voltage and peak pulse current that remain within the operating envelope for general-purpose transient protection applications.

Parameter Comparison

Engineering Selection Recommendations

TVS524 (Microchip Technology): Primary part specification. Active product status with RoHS non-compliant classification. Suitable for applications where the specific package envelope (B, Axial) and performance characteristics are required and legacy compliance status is acceptable.

LDP24A and LDP24ARL (STMicroelectronics): Both substitute parts are active products with ROHS3 compliance, providing regulatory advantage in modern manufacturing environments. The LDP24ARL offers identical electrical specifications to LDP24A and is available in greater volume. Both parts feature superior peak pulse current handling (30A versus 11.9A), enabling higher transient event suppression capacity. The R-6 axial package is mechanically compatible with through-hole design requirements but differs in form factor from the B-axial package of the TVS524.

Selection between substitute parts should prioritize ROHS3 compliance requirements and mounting space constraints specific to the application circuit board layout.

Frequently Asked Questions (FAQ)

Q: Can LDP24A or LDP24ARL directly replace TVS524 in all applications? A: Both substitute parts meet the core electrical parameters for TVS functionality: 24V reverse standoff voltage, single-channel unidirectional operation, and through-hole mounting. The R-6 axial package differs physically from the B-axial package; verify PCB mounting holes and spacing accommodate the different package dimensions before substitution.

Q: What is the significance of the higher peak pulse current in LDP24A and LDP24ARL? A: The 30A peak pulse current rating (versus 11.9A in TVS524) indicates greater capability to suppress higher-magnitude transient events. This specification is equivalent or superior for general-purpose protection, providing margin against transient amplitudes within the 24V reverse standoff class.

Q: Are there compliance considerations when selecting between these parts? A: The TVS524 carries RoHS non-compliant status, while both LDP24A and LDP24ARL are ROHS3 compliant. Products destined for markets with RoHS directive requirements must use the STMicroelectronics alternatives. Both substitute parts maintain identical REACH and ECCN classifications as the primary part.

Q: How do the clamping voltage differences affect circuit protection? A: The TVS524 clamps at a maximum of 42V, while LDP24A and LDP24ARL clamp at 40V. The 2V difference represents improved transient suppression efficiency in the substitute parts, providing faster response with lower clamping thresholds suitable for general-purpose transient protection circuits.

Q: Is packaging choice limited to physical fit alone? A: Package selection depends on three factors: PCB mounting hole compatibility (through-hole confirmed for all three parts), circuit board space available for component orientation, and reel/tape packaging availability (LDP24A and LDP24ARL supplied in cut-tape format; TVS524 in bulk packaging). Verify supply chain availability for your production volume requirements.