XT600SM Gas Discharge Tube - Equivalent & Substitute Parts

Part Overview

The XT600SM is a Gas Discharge Tube (GDT) rated at 600V with 2-pole surface mount configuration, manufactured by Littelfuse Inc. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system support and new design implementations. The XT600SM serves as overvoltage protection in electronic circuits by providing a low-impedance discharge path when voltage thresholds are exceeded.

Substiute Parts

XT600SM

Littelfuse Inc.In Stock: 663XT600SM Datasheet

Current PartRFQ

XT600C

Littelfuse Inc.In Stock: 751XT600C Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the XT600SM is determined by the following critical parameters:

• Voltage Rating: 600 V DC spark over nominal voltage
• Pole Configuration: 2-pole architecture
• Mounting Technology: Surface mount capability
• Package Form Factor: 2-SMD Cylinder Square End physical dimensions
• Electrical Behavior: No fail-short characteristic
• Regulatory Compliance: ROHS3 compliance requirement

The XT600C qualifies as a direct substitute based on matching all critical electrical and mechanical parameters. The primary distinction is product status: XT600C is active production, whereas XT600SM is obsolete.

Parameter Comparison

Engineering Selection Recommendations

The XT600C is the manufacturer-recommended substitute for the obsolete XT600SM. Both components are manufactured by Littelfuse Inc. and maintain identical electrical specifications, mechanical packaging, and regulatory compliance certifications. The XT600C is currently in active production status, ensuring availability for procurement and supply chain continuity.

Selection of XT600C over XT600SM is appropriate for:

• Replacement in existing designs currently using XT600SM
• New designs requiring 600V, 2-pole surface mount GDT protection
• Applications requiring ROHS3 compliance and MSL 1 moisture sensitivity rating

Frequently Asked Questions (FAQ)

Q: Can XT600C be used as a direct replacement for XT600SM in existing PCB designs?

A: Yes. The XT600C matches all critical electrical parameters (600V spark over, 2-pole configuration) and physical package specifications (2-SMD Cylinder Square End surface mount). No PCB layout modifications are required.

Q: What is the primary reason for substituting XT600SM with XT600C?

A: XT600SM is classified as obsolete. XT600C is the active production equivalent from Littelfuse Inc., ensuring long-term availability and supply chain reliability.

Q: Are there any compliance differences between XT600SM and XT600C?

A: No. Both components are ROHS3 compliant with identical MSL 1 (Unlimited) moisture sensitivity ratings.

Q: Does the package form factor remain unchanged between these parts?

A: Yes. Both use 2-SMD Cylinder Square End surface mount packaging, maintaining identical footprint and mounting characteristics.

Q: Is manufacturer approval required for this substitution?

A: The XT600C is the manufacturer-recommended substitute from Littelfuse Inc., eliminating the need for additional qualification.