SL1024A500RG Gas Discharge Tube - Equivalent & Substitute Parts

Part Overview

The SL1024A500RG is a Gas Discharge Tube (GDT) rated for 500V DC spark-over voltage with 10kA impulse discharge current capacity in a 3-pole through-hole configuration. This component is classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability for new production and field replacements.

Substiute Parts

SL1024A500RG

Littelfuse Inc.In Stock: 932SL1024A500RG Datasheet

Current PartRFQ

SL1021A500RF

Littelfuse Inc.In Stock: 1921SL1021A500RF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The SL1021A500RF qualifies as a direct substitute for the SL1024A500RG based on electrical and mechanical parameter equivalence. Substitution is valid when the following criteria are met:

• Voltage - DC Spark Over (Nominal): 500 V (identical)
• Impulse Discharge Current (8/20µs): 10000A (10kA) (identical)
• Number of Poles: 3 (identical)
• Fail Mode: Short (identical)
• Mounting Type: Through Hole (identical)
• Package / Case: Axial Cylinder, 3 Lead (Radial Bend) (identical)
• RoHS Status: ROHS3 Compliant (equivalent compliance)
• Moisture Sensitivity Level (MSL): 1 (Unlimited) (identical)

Parameter Comparison

Engineering Selection Recommendations

The SL1021A500RF is the qualified substitute for the obsolete SL1024A500RG. Both components are manufactured by Littelfuse Inc. and maintain identical electrical performance specifications and mechanical form factors. The SL1021A500RF carries active product status, ensuring ongoing availability and supply chain support. Both parts meet ROHS3 compliance requirements and share equivalent environmental specifications (MSL 1 - Unlimited). The primary distinction is packaging format: the SL1024A500RG is supplied in bulk, while the SL1021A500RF is supplied in trays. This packaging difference does not affect electrical or mechanical compatibility and is a logistics consideration only.

Frequently Asked Questions (FAQ)

Q: Can the SL1021A500RF be used as a direct replacement for the SL1024A500RG in existing designs?

A: Yes. Both components share identical electrical ratings (500V DC spark-over, 10kA impulse discharge current), mechanical configuration (3-pole through-hole, axial cylinder package), and fail-short characteristics. No circuit redesign is required.

Q: What is the primary reason for substitution?

A: The SL1024A500RG is classified as obsolete. The SL1021A500RF is the active equivalent from the same manufacturer, ensuring continued supply availability for production and field service applications.

Q: Are there compliance differences between these parts?

A: No. Both components are ROHS3 compliant and carry identical moisture sensitivity levels (MSL 1 - Unlimited). Environmental and regulatory compliance is equivalent.

Q: Does the packaging difference (bulk vs. tray) affect compatibility?

A: No. Packaging format is a supply chain and logistics consideration only. The electrical and mechanical specifications are identical, and the components are functionally interchangeable in circuit applications.

Q: Are both parts suitable for new designs?

A: The SL1021A500RF is recommended for new designs due to its active product status. The SL1024A500RG should not be specified for new applications as it is obsolete and subject to discontinuation.