SL1024A420RG Gas Discharge Tube - Equivalent & Substitute Parts

Part Overview

The SL1024A420RG is a Gas Discharge Tube (GDT) rated for 420V DC spark-over voltage with 10kA impulse discharge current capacity in a 3-pole through-hole configuration. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity. The SL1021A420RF serves as the direct functional equivalent from the same manufacturer, offering identical electrical performance with active product status.

Substiute Parts

SL1024A420RG

Littelfuse Inc.In Stock: 837SL1024A420RG Datasheet

Current PartRFQ

SL1021A420RF

Littelfuse Inc.In Stock: 752SL1021A420RF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SL1024A420RG with the SL1021A420RF is based on matching the following critical electrical and mechanical parameters:

• Voltage - DC Spark Over (Nominal): 420 V
• Impulse Discharge Current (8/20µs): 10000A (10kA)
• Number of Poles: 3
• Fail Short characteristic: Yes
• Mounting Type: Through Hole
• Package / Case: Axial Cylinder, 3 Lead (Radial Bend)
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Both parts belong to the Littelfuse GDT product family and maintain identical electrical specifications and physical form factors, ensuring direct functional interchangeability in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

The SL1021A420RF is the appropriate selection for applications currently using the SL1024A420RG. The substitute part maintains full electrical and mechanical compatibility while offering the advantage of active product status, ensuring long-term availability and manufacturing support. Both components meet ROHS3 compliance requirements and carry identical electrical ratings for 420V DC spark-over and 10kA impulse discharge current capacity. The transition from the obsolete SL1024A420RG series to the active SL1021A420RF series presents no functional or performance trade-offs for through-hole GDT applications requiring 3-pole surge protection.

Frequently Asked Questions (FAQ)

Q: Can the SL1021A420RF be used as a direct replacement for the SL1024A420RG?

A: Yes. Both parts share identical electrical specifications (420V DC spark-over, 10kA impulse discharge current), pole configuration (3-pole), and physical form factor (Axial Cylinder, 3 Lead Radial Bend through-hole mounting). Direct substitution is supported without circuit modification.

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

A: The SL1024A420RG is classified as obsolete, while the SL1021A420RF maintains active product status. Both belong to the Littelfuse GDT family and deliver identical performance characteristics. The series designation differs (SL1024A versus SL1021A), but electrical and mechanical parameters are equivalent.

Q: Are there packaging differences between the main part and substitute?

A: The SL1024A420RG packaging specification is not defined in the available data. The SL1021A420RF is supplied in Tray packaging. Both parts use the same Axial Cylinder, 3 Lead (Radial Bend) case style for through-hole mounting.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SL1024A420RG and SL1021A420RF are ROHS3 compliant, carry MSL rating of 1 (Unlimited), and share identical ECCN (EAR99) and HTSUS (8536.30.8000) classifications.

Q: Why should I transition from the SL1024A420RG to the SL1021A420RF?

A: The SL1024A420RG is obsolete, which limits future procurement availability and manufacturing support. The SL1021A420RF provides equivalent functionality with active product status, ensuring reliable long-term supply chain continuity for 420V 10kA 3-pole GDT applications.