SL1122A090 Equivalent & Substitute Parts

Part Overview

The SL1122A090 is a Gas Discharge Tube (GDT) rated for 90V 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 suitable substitute parts essential for ongoing design support and procurement continuity. The SL1122A090 remains available in inventory (1189 pcs), but obsolete status necessitates evaluation of active alternative components that maintain electrical and mechanical compatibility.

Substiute Parts

SL1122A090

Littelfuse Inc.In Stock: 1262SL1122A090 Datasheet

Current PartRFQ

GTCR36-900M-R10

Littelfuse Inc.In Stock: 1840GTCR36-900M-R10 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SL1122A090 is determined by strict equivalence across the following critical parameters:

• Voltage - DC Spark Over (Nominal): 90 V
• Impulse Discharge Current (8/20µs): 10000A (10kA)
• Number of Poles: 3
• Mounting Type: Through Hole
• Package / Case: Radial Cylinder, 3 Lead
• Fail Short characteristic: No

The GTCR36-900M-R10 meets all these requirements. Additional parameters including RoHS3 compliance, MSL rating, and ECCN classification remain consistent between the main part and substitute, confirming functional and regulatory equivalence.

Parameter Comparison

Engineering Selection Recommendations

The GTCR36-900M-R10 is the direct substitute for the SL1122A090. Both components are manufactured by Littelfuse Inc. and share identical electrical ratings (90V spark-over, 10kA impulse discharge current) and mechanical configuration (3-pole through-hole, radial cylinder package). The GTCR36-900M-R10 carries active product status, ensuring long-term availability and supply chain continuity compared to the obsolete SL1122A090. Both parts maintain ROHS3 compliance, identical MSL ratings, and equivalent export classification (EAR99), confirming regulatory and environmental compatibility. The GTCR36-900M-R10 specifies ±20% tolerance on voltage rating, providing defined performance boundaries for circuit design.

Frequently Asked Questions (FAQ)

Q: Can the GTCR36-900M-R10 directly replace the SL1122A090 in existing designs?

A: Yes. Both components share identical electrical specifications (90V spark-over, 10kA impulse discharge current), pole configuration (3-pole), and mechanical package (radial cylinder through-hole). No circuit modifications are required.

Q: What is the significance of the ±20% tolerance specification on the GTCR36-900M-R10?

A: The GTCR36-900M-R10 explicitly defines voltage tolerance as ±20%, meaning spark-over voltage will fall between 72V and 108V. The SL1122A090 does not specify tolerance. Both parts are rated for 90V nominal operation and are functionally equivalent for circuit applications.

Q: Why is the SL1122A090 classified as obsolete?

A: Obsolete status indicates the part is no longer in active production. The GTCR36-900M-R10 is the active equivalent and is recommended for new designs and long-term procurement.

Q: Are there packaging differences between these parts?

A: The SL1122A090 is supplied in standard packaging, while the GTCR36-900M-R10 is supplied in tray packaging. Both use identical radial cylinder, 3-lead through-hole packages suitable for PCB mounting.

Q: Do both parts meet the same regulatory and environmental standards?

A: Yes. Both components are ROHS3 compliant, carry MSL rating of 1 (unlimited moisture sensitivity), and share identical ECCN (EAR99) and HTSUS classifications.