GTCR37-151M-P10-FS Gas Discharge Tube Equivalent & Substitute Parts

Part Overview

The GTCR37-151M-P10-FS is a 3-pole gas discharge tube (GDT) manufactured by Littelfuse Inc., designed for surge protection applications requiring 150V DC spark-over voltage and 10kA impulse discharge current handling. This component is classified as obsolete, making identification of functionally equivalent active alternatives necessary for ongoing design support and procurement continuity.

Substiute Parts

GTCR37-151M-P10-FS

Littelfuse Inc.In Stock: 1199GTCR37-151M-P10-FS Datasheet

Current PartRFQ

2036-15-B2LF

Bourns Inc.In Stock: 44552036-15-B2LF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the GTCR37-151M-P10-FS is determined by matching the following critical electrical and mechanical parameters:

• Voltage - DC Spark Over (Nominal): 150 V
• Impulse Discharge Current (8/20µs): 10000A (10kA)
• Tolerance: ±20%
• Number of Poles: 3
• Mounting Type: Through Hole
• RoHS and REACH compliance status

The substitute part 2036-15-B2LF (Bourns Inc., Mini-TRIGARD™ 2036 series) meets all specified electrical parameters and compliance requirements. This part is classified as active product status, ensuring long-term availability and supply chain stability.

Parameter Comparison

Engineering Selection Recommendations

The 2036-15-B2LF is a direct functional equivalent for the GTCR37-151M-P10-FS based on matching electrical specifications (150V spark-over, 10kA impulse current, ±20% tolerance, 3-pole configuration). Both components maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for equivalent component selection.

The primary design consideration is the fail-short characteristic difference: the GTCR37-151M-P10-FS fails short, while the 2036-15-B2LF does not. This distinction must be evaluated against circuit protection requirements and system fault tolerance design. The package geometry difference (radial cylinder versus axial cylinder with radial bend) requires PCB layout verification to confirm mechanical fit within existing through-hole mounting positions.

The 2036-15-B2LF's active product status provides supply chain continuity and long-term availability advantages over the obsolete GTCR37-151M-P10-FS.

Frequently Asked Questions (FAQ)

Q: Can the 2036-15-B2LF directly replace the GTCR37-151M-P10-FS in existing designs?

A: Electrical substitution is valid based on matched spark-over voltage, impulse current rating, and pole configuration. Physical substitution requires verification of the package geometry difference (axial versus radial cylinder configuration) against PCB through-hole spacing and mounting constraints.

Q: What is the significance of the "Fail Short" parameter difference?

A: The GTCR37-151M-P10-FS fails short (conducts after discharge), while the 2036-15-B2LF does not. This affects post-surge circuit behavior and must be evaluated against the application's fault tolerance design and protection strategy.

Q: Are both parts compliant with current regulatory standards?

A: Both components are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement and use.

Q: Why is the GTCR37-151M-P10-FS listed as obsolete?

A: Obsolete status indicates the part is no longer manufactured by Littelfuse Inc. The 2036-15-B2LF (active status) provides equivalent functionality with assured long-term supply availability.

Q: What packaging differences exist between these parts?

A: The GTCR37-151M-P10-FS uses a radial cylinder package, while the 2036-15-B2LF uses an axial cylinder with radial bend configuration. Both are 3-lead through-hole designs; physical fit must be confirmed for the specific PCB layout.