SL1024B500RG Gas Discharge Tube - Equivalent & Substitute Parts

Part Overview

The SL1024B500RG is a 3-pole gas discharge tube (GDT) rated for 500V DC spark-over voltage with 20kA impulse discharge current capacity. Designed for through-hole mounting in axial cylinder configuration, this component is classified as obsolete. Due to its obsolete status, identifying functionally equivalent active alternatives is essential for ongoing design support, production continuity, and component sourcing.

Substiute Parts

SL1024B500RG

Littelfuse Inc.In Stock: 898SL1024B500RG Datasheet

Current PartRFQ

SL1021B500RF

Littelfuse Inc.In Stock: 710SL1021B500RF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SL1024B500RG is determined by strict equivalence across the following critical parameters:

• Voltage Rating: 500V DC spark-over voltage (nominal)
• Discharge Current: 20kA impulse discharge current (8/20µs waveform)
• Pole Configuration: 3-pole architecture
• Fail Mode: Short circuit failure characteristic
• Mounting and Package: Through-hole axial cylinder with 3 radial leads
• Environmental Compliance: ROHS3 compliance and MSL 1 rating

The SL1021B500RF meets all these criteria and is classified as an active product, making it a direct functional equivalent suitable for replacement in applications currently using the SL1024B500RG.

Parameter Comparison

Engineering Selection Recommendations

The SL1021B500RF is the direct equivalent for the obsolete SL1024B500RG. Both components are manufactured by Littelfuse Inc. and share identical electrical specifications (500V spark-over, 20kA discharge current) and mechanical configuration (3-pole through-hole axial cylinder). The SL1021B500RF carries active product status, ensuring ongoing availability and manufacturing support. Both parts maintain ROHS3 compliance and MSL 1 rating, confirming environmental and reliability equivalence. The SL1021B500RF is available in tray packaging, which may differ from the original part's packaging configuration but does not affect functional performance or circuit compatibility.

Frequently Asked Questions (FAQ)

Q: Can the SL1021B500RF be used as a direct replacement for the SL1024B500RG?

A: Yes. Both components have identical voltage ratings (500V), discharge current capacity (20kA), pole configuration (3-pole), fail mode (short), and through-hole mounting characteristics. They are functionally equivalent for circuit applications.

Q: What is the primary reason for substitution?

A: The SL1024B500RG is classified as obsolete. The SL1021B500RF is an active product from the same manufacturer with identical electrical and mechanical specifications, ensuring continued component availability.

Q: Are there any compliance differences between the two parts?

A: No. Both parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings. Environmental and regulatory compliance is equivalent.

Q: Does the packaging difference affect compatibility?

A: Packaging format (tray versus other configurations) does not affect electrical performance or circuit compatibility. The physical component dimensions and lead configuration remain identical.

Q: What parameters must match for substitution to be valid?

A: Voltage rating, discharge current, number of poles, fail mode, mounting type, and package/case configuration must all match. The SL1021B500RF meets all these criteria for the SL1024B500RG.