SL1024B090R Gas Discharge Tube - Equivalent & Substitute Parts

Part Overview

The SL1024B090R is a 3-pole gas discharge tube (GDT) manufactured by Littelfuse, designed for overvoltage protection applications. This through-hole component features a 90V DC spark-over voltage rating and 20kA impulse discharge current capacity. The part is currently in active production status with 1115 units available in inventory. Alternative part numbers may be required due to supply chain considerations, design revisions, or inventory availability.

Substiute Parts

SL1024B090R

LittelfuseIn Stock: 1191SL1024B090R Datasheet

Current PartRFQ

SL1021B090R

Littelfuse Inc.In Stock: 2164SL1021B090R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The SL1021B090R qualifies as a direct substitute for the SL1024B090R based on electrical and mechanical parameter equivalence. Both components share identical specifications across all critical substitution criteria:

• Voltage - DC Spark Over (Nominal): 90 V
• Impulse Discharge Current (8/20µs): 20000A (20kA)
• Number of Poles: 3
• Mounting Type: Through Hole
• Package / Case: Axial Cylinder, 3 Lead (Radial Bend)
• Fail Short: No
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

The substitution is valid within the same series family, with both parts manufactured by Littelfuse and maintaining active product status.

Parameter Comparison

Engineering Selection Recommendations

Both the SL1024B090R and SL1021B090R are suitable for applications requiring 90V overvoltage protection with 20kA discharge capacity in 3-pole through-hole configurations. Selection between these parts should be based on:

• Inventory availability: SL1021B090R has 2100 units in stock versus 1115 units for SL1024B090R
• Supply chain lead times and procurement timelines
• Design documentation and part number specifications in existing schematics

Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for industrial and commercial applications. The identical electrical and mechanical parameters guarantee functional interchangeability without circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can SL1021B090R be used as a direct replacement for SL1024B090R?

A: Yes. Both parts share identical voltage ratings (90V DC spark-over), discharge current capacity (20kA), pole configuration (3-pole), mounting type (through-hole), and package geometry (Axial Cylinder, 3 Lead Radial Bend). No circuit modifications are required.

Q: Are there any differences in compliance or environmental ratings?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity ratings. Regulatory and environmental specifications are equivalent.

Q: What determines substitution eligibility for gas discharge tubes?

A: Substitution eligibility is determined by matching voltage ratings, impulse discharge current capacity, number of poles, mounting type, and package geometry. Both the SL1024B090R and SL1021B090R meet all these criteria.

Q: Does the series designation (SL1024B vs. SL1021B) affect compatibility?

A: Series designation reflects internal design variations within the Littelfuse product family. Substitution is valid when all electrical and mechanical parameters are identical, as confirmed in the parameter comparison table.

Q: Are there inventory considerations for part selection?

A: Yes. The SL1021B090R has higher inventory availability (2100 units) compared to the SL1024B090R (1115 units). This may influence procurement decisions based on project timelines and supply chain requirements.