SL1024A500R Gas Discharge Tube - Equivalent & Substitute Parts

Part Overview

The SL1024A500R is a 3-pole gas discharge tube (GDT) rated for 500V DC spark-over voltage with 10kA impulse discharge current capacity. Designed for through-hole mounting in axial cylinder configuration, this component is used for transient overvoltage protection in telecommunications, power distribution, and industrial control applications.

The SL1024A500R is classified as obsolete. Identifying functionally equivalent active alternatives ensures design continuity and supply chain reliability for new production runs and field replacements.

Substiute Parts

SL1024A500R

Littelfuse Inc.In Stock: 1154SL1024A500R Datasheet

Current PartRFQ

SL1021A500R

Littelfuse Inc.In Stock: 1726SL1021A500R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SL1024A500R is determined by strict equivalence across the following critical parameters:

• Voltage - DC Spark Over (Nominal): 500 V
• Impulse Discharge Current (8/20µs): 10000A (10kA)
• Number of Poles: 3
• Mounting Type: Through Hole
• Package / Case: Axial Cylinder, 3 Lead (Radial Bend)
• Fail Short Characteristic: No

The SL1021A500R meets all substitution criteria. While classified under a different series designation (SL1021A vs. SL1024A), both components share identical electrical ratings, mechanical configuration, and environmental compliance specifications. The primary distinction is product status: SL1021A500R is active production, whereas SL1024A500R is obsolete.

Parameter Comparison

Engineering Selection Recommendations

The SL1021A500R is the direct functional equivalent for SL1024A500R applications. Selection should prioritize the SL1021A500R due to its active production status, ensuring long-term supply availability and consistent manufacturing quality.

Both components carry identical electrical performance specifications, mechanical dimensions, and regulatory compliance certifications (ROHS3, EAR99 export classification). No design modifications are required for substitution in existing PCB layouts or circuit designs.

The SL1021A500R is supplied in tray packaging, consistent with standard production handling for through-hole gas discharge tubes.

Frequently Asked Questions (FAQ)

Q: Can SL1021A500R be used as a direct replacement for SL1024A500R in existing designs?

A: Yes. Both components are electrically and mechanically identical across all critical parameters: 500V DC spark-over voltage, 10kA impulse discharge current, 3-pole configuration, through-hole mounting, and axial cylinder package. No circuit modifications are required.

Q: What is the primary reason for substitution?

A: The SL1024A500R is obsolete. The SL1021A500R is the active production equivalent from the same manufacturer, ensuring continued supply and manufacturing consistency.

Q: Are there any compliance or certification differences between these parts?

A: No. Both components are ROHS3 compliant, carry identical ECCN and HTSUS classifications, and share the same moisture sensitivity level (MSL 1 - Unlimited).

Q: Does packaging differ between these parts?

A: The SL1024A500R and SL1021A500R use identical axial cylinder, 3-lead radial bend packages. Packaging format (tray vs. other configurations) does not affect electrical or mechanical compatibility.

Q: Are there any electrical performance differences?

A: No. Both parts are rated for 500V DC spark-over voltage and 10kA impulse discharge current (8/20µs). Fail-short characteristics are identical (No).