SL1024A300R Gas Discharge Tube - Equivalent & Substitute Parts

Part Overview

The SL1024A300R is a 3-pole gas discharge tube (GDT) rated for 300V DC spark-over voltage with 10kA impulse discharge current capacity. Designed for through-hole mounting in axial cylinder configuration, this component is used for transient overvoltage protection in telecommunications, power supply, and industrial control applications.

The SL1024A300R is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or field replacement requirements.

Substiute Parts

SL1024A300R

LittelfuseIn Stock: 1009SL1024A300R Datasheet

Current PartRFQ

SL1021A300R

Littelfuse Inc.In Stock: 1087SL1021A300R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SL1024A300R is based on electrical and mechanical parameter equivalence. The following criteria determine valid substitutes:

• Voltage - DC Spark Over (Nominal): 300 V
• Impulse Discharge Current (8/20µs): 10000A (10kA)
• Number of Poles: 3
• Mounting Type: Through Hole
• Package / Case: Axial Cylinder, 3 Lead (Radial Bend)
• Fail Short characteristic: No

The SL1021A300R meets all these criteria and is classified as an active product from the same manufacturer (Littelfuse Inc.), making it a direct electrical and mechanical equivalent.

Parameter Comparison

Engineering Selection Recommendations

The SL1021A300R is the direct substitute for the obsolete SL1024A300R. Both components share identical electrical specifications (300V spark-over, 10kA impulse current) and mechanical form factors (3-pole through-hole axial cylinder). The SL1021A300R carries active product status, ensuring ongoing manufacturer support and supply availability.

Both parts maintain ROHS3 compliance and MSL 1 rating, confirming equivalent environmental and handling requirements. The SL1021A300R is available in tray packaging, which may differ from the original part's packaging configuration but does not affect functional compatibility.

Frequently Asked Questions (FAQ)

Q: Can the SL1021A300R be used as a direct replacement for the SL1024A300R?

A: Yes. Both components have identical electrical ratings (300V DC spark-over, 10kA impulse discharge current), identical pole configuration (3-pole), and identical mechanical form factor (through-hole axial cylinder with radial bend leads). No circuit redesign or board layout modification is required.

Q: What is the difference between the SL1024A and SL1021A series?

A: The SL1024A series is obsolete, while the SL1021A series is active. Both series share the same electrical and mechanical specifications for equivalent voltage and current ratings. The series designation change reflects product line consolidation by the manufacturer.

Q: Are there any compliance or certification differences?

A: No. Both the SL1024A300R and SL1021A300R are ROHS3 compliant with MSL 1 rating. Both carry the same ECCN (EAR99) and HTSUS (8536.30.8000) classifications.

Q: Does packaging format affect compatibility?

A: Packaging format (tray versus other formats) does not affect component functionality or electrical performance. Packaging differences only impact handling, storage, and logistics. The component itself remains functionally identical.

Q: What should be verified before implementing the substitute?

A: Verify that your circuit board layout accommodates the through-hole axial cylinder form factor with radial bend leads. Confirm that your assembly process is compatible with tray packaging if the SL1021A300R is procured in this format. No electrical verification is required due to parameter equivalence.