SL1024B500RF Equivalent & Substitute Parts

Part Overview

The SL1024B500RF is a Gas Discharge Tube (GDT) rated for 500V DC spark-over voltage with 20kA impulse discharge current capacity in a 3-pole through-hole configuration. This component is classified as Obsolete, making identification of suitable substitute parts essential for ongoing design support and procurement planning. The SL1021B500RF serves as a direct functional equivalent with identical electrical specifications and mechanical compatibility.

Substiute Parts

SL1024B500RF

Littelfuse Inc.In Stock: 777SL1024B500RF Datasheet

Current PartRFQ

SL1021B500RF

Littelfuse Inc.In Stock: 710SL1021B500RF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The SL1021B500RF qualifies as a direct substitute for the SL1024B500RF based on matching electrical and mechanical parameters. Substitution is valid when the following criteria are met:

• Voltage - DC Spark Over (Nominal): 500 V (identical)
• Impulse Discharge Current (8/20µs): 20000A (20kA) (identical)
• Number of Poles: 3 (identical)
• Fail Short characteristic: Yes (identical)
• Mounting Type: Through Hole (identical)
• Package / Case: Axial Cylinder, 3 Lead (Radial Bend) (identical)

The SL1021B500RF maintains Active product status, ensuring continued availability and manufacturing support compared to the Obsolete SL1024B500RF.

Parameter Comparison

Engineering Selection Recommendations

The SL1021B500RF is the appropriate substitute for the obsolete SL1024B500RF. Both components are manufactured by Littelfuse Inc. and maintain identical electrical performance specifications (500V spark-over, 20kA impulse discharge current) and mechanical form factors (3-pole through-hole, axial cylinder package). Both parts are ROHS3 compliant and carry EAR99 export classification.

The primary distinction is product lifecycle status: the SL1024B500RF is Obsolete, while the SL1021B500RF maintains Active status, ensuring continued manufacturing availability and supply chain reliability. The SL1021B500RF is packaged in Tray format, whereas the SL1024B500RF was supplied in bulk packaging.

Frequently Asked Questions (FAQ)

Q: Can the SL1021B500RF directly replace the SL1024B500RF in existing designs?

A: Yes. Both parts share identical electrical ratings (500V DC spark-over, 20kA impulse discharge current), pole configuration (3-pole), fail-short characteristic, and mechanical package (Axial Cylinder, 3 Lead Radial Bend through-hole). Direct substitution is valid without circuit modification.

Q: What is the primary reason for substitution?

A: The SL1024B500RF is classified as Obsolete. The SL1021B500RF provides functional equivalence with Active product status, ensuring long-term availability and manufacturing support.

Q: Are there compliance differences between these parts?

A: No. Both parts are ROHS3 compliant, carry MSL 1 (Unlimited) moisture sensitivity rating, and share identical ECCN classification (EAR99).

Q: Does packaging format affect electrical performance?

A: No. The SL1024B500RF (bulk packaging) and SL1021B500RF (tray packaging) are electrically and mechanically identical. Packaging format is a procurement and logistics consideration only.

Q: Are both parts suitable for 500V, 20kA surge protection applications?

A: Yes. Both the SL1024B500RF and SL1021B500RF are rated for 500V DC spark-over voltage with 20kA (8/20µs) impulse discharge current capacity and are designed for 3-pole surge protection circuits.