SL1024B450R Gas Discharge Tube - Equivalent & Substitute Parts

Part Overview

The SL1024B450R is a 3-pole gas discharge tube (GDT) rated for 450V DC spark-over voltage with 20kA impulse discharge current capacity. Designed for through-hole mounting in axial cylinder configuration, this component provides transient overvoltage protection in industrial and telecommunications applications.

The SL1024B450R carries an obsolete product status. Identifying equivalent substitute parts ensures design continuity and maintains supply chain reliability for existing applications and legacy system maintenance.

Substiute Parts

SL1024B450R

Littelfuse Inc.In Stock: 907SL1024B450R Datasheet

Current PartRFQ

SL1021B450R

Littelfuse Inc.In Stock: 1082SL1021B450R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SL1024B450R is determined by strict equivalence across the following critical parameters:

• Voltage - DC Spark Over (Nominal): 450 V
• Impulse Discharge Current (8/20µs): 20000 A (20 kA)
• Number of Poles: 3
• Mounting Type: Through Hole
• Package / Case: Axial Cylinder, 3 Lead (Radial Bend)
• Fail Short Characteristic: No

The SL1021B450R meets all substitution criteria. Both components are manufactured by Littelfuse Inc., share identical electrical ratings, mechanical configuration, and environmental compliance specifications. The primary distinction is product status: SL1024B450R is obsolete while SL1021B450R maintains active production status.

Parameter Comparison

Engineering Selection Recommendations

The SL1021B450R is the direct substitute for the obsolete SL1024B450R. Both components are ROHS3 compliant and carry identical electrical and mechanical specifications. The SL1021B450R maintains active production status, ensuring long-term availability and supply chain continuity.

Selection of SL1021B450R is appropriate for new designs, redesigns of legacy systems, and replacement applications requiring 450V 20kA 3-pole gas discharge tube protection with through-hole mounting.

Frequently Asked Questions (FAQ)

Q: Can SL1021B450R directly replace SL1024B450R in existing designs?

A: Yes. Both components share identical voltage ratings (450V DC spark-over), impulse discharge current (20kA), pole configuration (3-pole), mounting type (through-hole), and package geometry (axial cylinder, 3-lead radial bend). No circuit modifications are required.

Q: What is the primary difference between these two part numbers?

A: The SL1024B450R is obsolete while the SL1021B450R maintains active production status. Electrical and mechanical performance are equivalent.

Q: Are there packaging differences between SL1024B450R and SL1021B450R?

A: The SL1024B450R is supplied without specified packaging, while SL1021B450R is supplied in tray packaging. Both components use identical axial cylinder, 3-lead radial bend case geometry suitable for through-hole PCB mounting.

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

A: Yes. Both SL1024B450R and SL1021B450R are ROHS3 compliant with MSL rating of 1 (unlimited moisture sensitivity level). Both carry EAR99 ECCN classification and 8536.30.8000 HTSUS code.

Q: Which part should be specified for new designs?

A: Specify SL1021B450R for new designs. As an active product with identical performance characteristics, it ensures design continuity and supply availability.