SL1024B450RF Gas Discharge Tube Equivalent & Substitute Parts

Part Overview

The SL1024B450RF is a 3-pole gas discharge tube (GDT) rated for 450V 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 SL1024B450RF is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this component.

Substiute Parts

SL1024B450RF

Littelfuse Inc.In Stock: 770SL1024B450RF Datasheet

Current PartRFQ

SL1021B450RF

Littelfuse Inc.In Stock: 1820SL1021B450RF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SL1024B450RF 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
• Fail Mode: Short
• Mounting Type: Through Hole
• Package / Case: Axial Cylinder, 3 Lead (Radial Bend)
• RoHS Status: ROHS3 Compliant

The SL1021B450RF meets all substitution criteria. While classified under a different series designation (SL1021B versus SL1024B), both components share identical electrical ratings, mechanical configuration, and compliance certifications, making them functionally interchangeable for the specified application.

Parameter Comparison

Engineering Selection Recommendations

The SL1021B450RF is the direct substitute for the obsolete SL1024B450RF. Both components are manufactured by Littelfuse Inc. and maintain identical electrical and mechanical specifications across all critical parameters.

The SL1021B450RF carries Active product status, ensuring ongoing availability and supply chain support. Both parts are ROHS3 compliant and carry identical ECCN (EAR99) and HTSUS (8536.30.8000) classifications, confirming regulatory and trade compliance equivalence.

For applications currently utilizing the SL1024B450RF, transition to the SL1021B450RF requires no circuit redesign or application re-qualification, as all functional parameters remain unchanged.

Frequently Asked Questions (FAQ)

Q: Can the SL1021B450RF be used as a direct replacement for the SL1024B450RF?

A: Yes. Both components share identical voltage ratings (450V DC spark-over), impulse discharge current (20kA), pole configuration (3-pole), fail mode (short), mounting type (through-hole), and package geometry (Axial Cylinder, 3 Lead Radial Bend). No circuit modifications are required.

Q: What is the difference between the SL1024B and SL1021B series designations?

A: The series designation reflects internal Littelfuse product line organization. From an engineering standpoint, the SL1021B450RF and SL1024B450RF are functionally equivalent across all specified electrical and mechanical parameters.

Q: Is the SL1021B450RF available in the same packaging as the SL1024B450RF?

A: Both components use identical through-hole mounting with Axial Cylinder, 3 Lead (Radial Bend) package geometry. The SL1021B450RF is supplied in Tray packaging, while the SL1024B450RF was supplied in standard packaging. This difference does not affect component functionality or PCB integration.

Q: Are there any compliance or certification differences between these parts?

A: No. Both components are ROHS3 compliant, carry MSL rating of 1 (Unlimited), and share identical ECCN and HTSUS classifications. Regulatory and trade compliance are equivalent.

Q: Why is the SL1024B450RF listed as obsolete?

A: Product obsolescence reflects Littelfuse's product lifecycle management. The SL1021B450RF remains in active production and provides full functional equivalence, ensuring continued availability for applications requiring 450V, 20kA, 3-pole gas discharge tube protection.