SL1024B300R Gas Discharge Tube - Equivalent & Substitute Parts

Part Overview

The SL1024B300R is a 3-pole gas discharge tube (GDT) rated for 300V DC spark-over voltage with an impulse discharge current capacity of 20kA (8/20µs). Manufactured by Littelfuse Inc., this component is designed for through-hole mounting applications requiring overvoltage protection in multi-pole configurations.

The SL1024B300R is classified as obsolete. Locating equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades.

Substiute Parts

SL1024B300R

Littelfuse Inc.In Stock: 896SL1024B300R Datasheet

Current PartRFQ

SL1021B300R

Littelfuse Inc.In Stock: 1289SL1021B300R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SL1024B300R is determined by strict equivalence across the following critical parameters:

• Voltage Rating: 300V DC spark-over voltage (nominal)
• Discharge Current: 20kA impulse discharge current (8/20µs waveform)
• Pole Configuration: 3-pole architecture
• Mounting Technology: Through-hole assembly
• Physical Package: Axial cylinder with 3 radial leads
• Failure Mode: Non-shorting characteristic
• Environmental Compliance: ROHS3 compliance

The SL1021B300R meets all these criteria and is classified as an active product, making it a direct functional equivalent for the obsolete SL1024B300R.

Parameter Comparison

Engineering Selection Recommendations

The SL1021B300R is the direct substitute for the SL1024B300R. Both components are manufactured by Littelfuse Inc. and share identical electrical and mechanical specifications across all critical parameters. The SL1021B300R carries active product status, ensuring ongoing availability and supply chain continuity.

Both parts maintain ROHS3 compliance and identical moisture sensitivity ratings, confirming environmental and regulatory compatibility. The transition from SL1024B300R to SL1021B300R requires no circuit redesign or PCB layout modifications, as physical dimensions and lead configuration remain unchanged.

Frequently Asked Questions (FAQ)

Q: Can the SL1021B300R be used as a direct replacement for the SL1024B300R?

A: Yes. The SL1021B300R is electrically and mechanically equivalent to the SL1024B300R. Both components feature identical 300V spark-over voltage, 20kA discharge current, 3-pole configuration, and through-hole mounting with axial cylinder packaging. No circuit modifications are required.

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

A: The SL1024B300R is obsolete, while the SL1021B300R is an active product. The SL1021B300R is the recommended choice for new designs and ongoing production due to its active status and guaranteed supply availability.

Q: Are there any packaging differences between the SL1024B300R and SL1021B300R?

A: The physical package and lead configuration are identical. The SL1024B300R was supplied in standard packaging, while the SL1021B300R is supplied in tray packaging. Both are suitable for through-hole PCB assembly without modification to board layouts or assembly processes.

Q: Do both parts meet the same environmental and compliance standards?

A: Yes. Both the SL1024B300R and SL1021B300R are ROHS3 compliant with MSL rating of 1 (unlimited moisture sensitivity). Both carry the same ECCN classification (EAR99), confirming equivalent regulatory status.

Q: Is there any inventory consideration when selecting between these parts?

A: The SL1021B300R has higher current inventory availability (1240 pcs) compared to the SL1024B300R (858 pcs). For new production and long-term supply security, the SL1021B300R is the preferred selection.