SL1024B250RG Gas Discharge Tube - Equivalent & Substitute Parts

Part Overview

The SL1024B250RG is a 3-pole gas discharge tube (GDT) rated for 250V DC spark-over voltage with 20kA impulse discharge current capacity. This component is designed for through-hole mounting and provides fail-short protection in surge suppression applications.

The SL1024B250RG is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or field replacement requirements.

Substiute Parts

SL1024B250RG

Littelfuse Inc.In Stock: 835SL1024B250RG Datasheet

Current PartRFQ

SL1021B250RF

Littelfuse Inc.In Stock: 1181SL1021B250RF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SL1024B250RG is based on electrical and mechanical parameter equivalence. The following criteria determine valid substitutes:

• Voltage - DC Spark Over (Nominal): 250 V
• Impulse Discharge Current (8/20µs): 20000A (20kA)
• Number of Poles: 3
• Fail Short: Yes
• Mounting Type: Through Hole
• Package / Case: Axial Cylinder, 3 Lead (Radial Bend)
• RoHS Status: ROHS3 Compliant

The SL1021B250RF meets all these criteria and is classified as an active product, making it a direct electrical and mechanical equivalent suitable for replacement applications.

Parameter Comparison

Engineering Selection Recommendations

The SL1021B250RF is the direct substitute for the obsolete SL1024B250RG. Both components are manufactured by Littelfuse Inc. and share identical electrical specifications and mechanical form factors.

The SL1021B250RF holds active product status, ensuring ongoing availability and manufacturer support. Both parts maintain ROHS3 compliance and MSL 1 rating, confirming equivalent environmental and regulatory standing.

Selection of the SL1021B250RF eliminates obsolescence risk while maintaining full electrical and mechanical compatibility with existing circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the SL1021B250RF be used as a direct replacement for the SL1024B250RG?

A: Yes. Both components share identical voltage ratings (250V DC spark-over), impulse discharge current (20kA), pole configuration (3-pole), fail-short behavior, mounting type (through-hole), and package geometry (Axial Cylinder, 3 Lead Radial Bend). Electrical and mechanical compatibility is complete.

Q: What is the primary difference between these two parts?

A: The SL1024B250RG is obsolete, while the SL1021B250RF is active. The SL1021B250RF is supplied in tray packaging, whereas the SL1024B250RG packaging specification is not defined. Both parts are functionally equivalent.

Q: Are there any compliance or certification differences?

A: No. Both parts are ROHS3 compliant, carry MSL 1 (Unlimited) moisture sensitivity ratings, and share identical ECCN (EAR99) and HTSUS (8536.30.8000) classifications.

Q: Is PCB layout modification required when switching to the SL1021B250RF?

A: No. The identical through-hole mounting type and axial cylinder package with 3-lead radial bend configuration ensure direct footprint compatibility without PCB redesign.

Q: What inventory considerations apply to this substitution?

A: The SL1021B250RF is actively manufactured and stocked, providing reliable long-term supply. The SL1024B250RG, being obsolete, has limited remaining inventory and should not be specified for new designs.