GTCR36-900M-P05-FS Gas Discharge Tube Equivalent & Substitute Parts

Part Overview

The GTCR36-900M-P05-FS is a 3-pole gas discharge tube (GDT) manufactured by Littelfuse Inc., rated for 90V DC spark-over voltage with 5kA impulse discharge current. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement planning. The part features through-hole radial cylinder packaging with fail-short capability and is fully RoHS3 compliant.

Substiute Parts

GTCR36-900M-P05-FS

Littelfuse Inc.In Stock: 1058GTCR36-900M-P05-FS Datasheet

Current PartRFQ

2036-09-B2LF

Bourns Inc.In Stock: 102052036-09-B2LF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the GTCR36-900M-P05-FS is determined by the following critical parameters:

• Voltage Rating: 90V DC spark-over voltage (nominal)
• Pole Configuration: 3-pole architecture
• Mounting Technology: Through-hole assembly
• Electrical Tolerance: ±20% specification
• Regulatory Compliance: RoHS3 and REACH status

The substitute part 2036-09-B2LF (Bourns Inc., Mini-TRIGARD™ 2036 series) meets all primary substitution criteria. While the impulse discharge current rating differs (10kA versus 5kA), this represents an enhanced capability within the same voltage and pole classification, maintaining functional compatibility for the specified 90V protection requirement.

Parameter Comparison

Engineering Selection Recommendations

The 2036-09-B2LF qualifies as a direct substitute based on matching voltage rating, pole count, mounting technology, and regulatory compliance. The substitute part is currently in active production status, ensuring long-term availability compared to the obsolete GTCR36-900M-P05-FS.

Physical package geometry differs between the two parts (radial cylinder versus axial cylinder with radial bend configuration). PCB layout and mechanical clearance verification is required prior to implementation. The fail-short characteristic differs between parts; circuit design must accommodate the 2036-09-B2LF fail-open behavior if the original design relied on fail-short operation.

Both parts maintain identical RoHS3 and REACH compliance status, supporting regulatory requirements without modification.

Frequently Asked Questions (FAQ)

Q: Can the 2036-09-B2LF directly replace the GTCR36-900M-P05-FS without PCB modification?

A: Electrical substitution is valid. Physical package geometry differs (radial cylinder versus axial cylinder with radial bend), requiring verification of PCB footprint compatibility and lead spacing. Mechanical clearance assessment is necessary before board-level implementation.

Q: What is the significance of the higher 10kA impulse discharge current in the substitute part?

A: The 2036-09-B2LF provides enhanced surge handling capability (10kA versus 5kA) while maintaining the same 90V spark-over voltage. This represents improved performance within the same protection class and does not compromise compatibility with the original 90V circuit requirement.

Q: Does the fail-short versus fail-open difference affect circuit operation?

A: Yes. The GTCR36-900M-P05-FS fails short; the 2036-09-B2LF fails open. Circuit designs that depend on fail-short behavior for continued operation must be evaluated. Designs requiring fail-open operation are unaffected.

Q: Are both parts compliant with current regulatory standards?

A: Both parts are RoHS3 compliant and REACH unaffected. The 2036-09-B2LF, being in active production, maintains current compliance status. The obsolete GTCR36-900M-P05-FS retains its historical compliance certification.

Q: What inventory considerations apply to this substitution?

A: The GTCR36-900M-P05-FS is obsolete with limited remaining stock (1003 pcs). The 2036-09-B2LF is in active production with robust inventory availability (10100 pcs), supporting long-term supply chain stability.