XT600A Gas Discharge Tube - Equivalent & Substitute Parts

Part Overview

The XT600A is a 2-pole gas discharge tube (GDT) rated for 600V DC spark-over voltage, designed for through-hole mounting in axial cylinder package configuration. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and component procurement.

The XT600A operates as a surge protection device, utilizing gas discharge technology to provide transient voltage suppression across two poles. Due to its obsolete status, equivalent active alternatives must be evaluated based on matching electrical specifications and mechanical compatibility.

Substiute Parts

XT600A

Littelfuse Inc.In Stock: 803XT600A Datasheet

Current PartRFQ

CG2600L

Littelfuse Inc.In Stock: 2787CG2600L Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the XT600A is determined by the following critical parameters that must remain constant:

• Voltage - DC Spark Over (Nominal): 600 V
• Number of Poles: 2
• Mounting Type: Through Hole
• Package / Case: Axial Cylinder
• Fail Short Characteristic: No

The CG2600L qualifies as a direct substitute because it maintains all critical electrical and mechanical parameters. Both components are manufactured by Littelfuse Inc., share identical spark-over voltage and pole configuration, and utilize the same through-hole axial cylinder package format. The CG2600L is currently in active production status, providing long-term component availability compared to the obsolete XT600A.

Parameter Comparison

Engineering Selection Recommendations

The CG2600L is the qualified substitute for the XT600A based on the following criteria:

Electrical Compatibility: Both components maintain 600V DC spark-over voltage and 2-pole configuration, ensuring functional equivalence in surge protection applications.

Mechanical Compatibility: Identical through-hole mounting type and axial cylinder package format enable direct board-level replacement without PCB redesign.

Regulatory Compliance: Both components meet ROHS3 compliance requirements and carry MSL 1 (Unlimited) moisture sensitivity rating, maintaining environmental and reliability standards.

Product Availability: The CG2600L is in active production status, providing assured long-term supply compared to the obsolete XT600A. This transition eliminates component obsolescence risk in new designs and ongoing production.

Discharge Current Enhancement: The CG2600L specifies 20kA impulse discharge current (8/20µs), providing documented surge handling capability. The XT600A does not specify this parameter, but the CG2600L's rating ensures adequate transient suppression performance.

Frequently Asked Questions (FAQ)

Q: Can the CG2600L be used as a direct replacement for the XT600A in existing designs?

A: Yes. The CG2600L maintains identical spark-over voltage (600V), pole count (2), mounting type (through-hole), and package format (axial cylinder). No PCB modifications are required for substitution.

Q: What is the primary reason for substituting the XT600A?

A: The XT600A is classified as obsolete. The CG2600L provides an active, in-production alternative that meets all critical electrical and mechanical specifications.

Q: Are there packaging differences between these components?

A: Both components use axial cylinder package format suitable for through-hole mounting. The XT600A is supplied in Tape & Reel packaging, while the CG2600L is supplied in Tray packaging. This difference does not affect electrical or mechanical compatibility.

Q: How do the impulse discharge current ratings compare?

A: The CG2600L specifies 20kA impulse discharge current (8/20µs). The XT600A does not provide this specification. The CG2600L's documented rating ensures defined surge handling performance.

Q: Are both components RoHS compliant?

A: Yes. Both the XT600A and CG2600L are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the inventory status of these components?

A: The XT600A has 746 pieces in stock (obsolete status). The CG2600L has 2700 pieces in stock (active status), providing greater availability for procurement.