SL1024A400RF Gas Discharge Tube - Equivalent & Substitute Parts

Part Overview

The SL1024A400RF is a 3-pole gas discharge tube (GDT) rated for 400V DC spark-over voltage with 10kA impulse discharge current capacity. Designed for through-hole mounting in axial cylinder configuration, this component is used for overvoltage protection in industrial and telecommunications applications.

The SL1024A400RF is classified as obsolete. Locating active equivalent parts is necessary to ensure continued availability for new designs and ongoing production support. The substitute part identified maintains identical electrical and mechanical specifications while offering active product status and improved supply chain availability.

Substiute Parts

SL1024A400RF

Littelfuse Inc.In Stock: 778SL1024A400RF Datasheet

Current PartRFQ

SL1021A400RF

Littelfuse Inc.In Stock: 1124SL1021A400RF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SL1024A400RF with the SL1021A400RF is based on matching the following critical parameters:

• Voltage - DC Spark Over (Nominal): 400 V
• Impulse Discharge Current (8/20µs): 10000A (10kA)
• Number of Poles: 3
• Fail Short: Yes
• Mounting Type: Through Hole
• Package / Case: Axial Cylinder, 3 Lead (Radial Bend)
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Both parts are manufactured by Littelfuse Inc. and share identical electrical performance characteristics and mechanical form factors. The SL1021A400RF represents the active product line continuation with equivalent specifications.

Parameter Comparison

Engineering Selection Recommendations

The SL1021A400RF is the direct equivalent for the obsolete SL1024A400RF. Both parts are ROHS3 compliant and carry identical electrical ratings and mechanical specifications. The SL1021A400RF offers the advantage of active product status, ensuring long-term availability and supply chain continuity.

For applications currently using the SL1024A400RF, direct substitution with the SL1021A400RF is appropriate without circuit redesign or performance compromise. The packaging difference (tray vs. standard packaging) does not affect functional compatibility in circuit applications.

Frequently Asked Questions (FAQ)

Q: Can the SL1021A400RF be used as a direct replacement for the SL1024A400RF?

A: Yes. Both parts share identical electrical specifications (400V DC spark-over, 10kA impulse discharge current), mechanical configuration (3-pole through-hole axial cylinder), and compliance certifications (ROHS3). Direct substitution is appropriate.

Q: What is the difference between the SL1024A400RF and SL1021A400RF?

A: The primary difference is product status. The SL1024A400RF is obsolete, while the SL1021A400RF is active. Both parts are functionally and mechanically equivalent. The SL1021A400RF represents the current production line.

Q: Are there any packaging considerations when substituting these parts?

A: The SL1024A400RF uses standard packaging, while the SL1021A400RF is supplied in tray packaging. This difference affects logistics and handling but does not impact electrical performance or circuit compatibility.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SL1024A400RF and SL1021A400RF are ROHS3 compliant with MSL rating of 1 (Unlimited). Both carry EAR99 ECCN classification and 8536.30.8000 HTSUS code.

Q: Which part should be specified for new designs?

A: The SL1021A400RF should be specified for new designs due to its active product status and assured long-term availability from Littelfuse Inc.