GT-BC3090L Gas Discharge Tube 90V 10kA 3-Pole Equivalent & Substitute Parts

Part Overview

The GT-BC3090L is a gas discharge tube (GDT) manufactured by Lumex Opto/Components Inc., designed for surge protection applications requiring 90V DC spark-over voltage with 10kA impulse discharge capability. This component features a 3-pole through-hole configuration in a radial cylinder package.

The GT-BC3090L is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this component.

Substiute Parts

GT-BC3090L

Lumex Opto/Components Inc.In Stock: 1253GT-BC3090L Datasheet

Current PartRFQ

GTCR37-900M-R10-FS

Littelfuse Inc.In Stock: 5261GTCR37-900M-R10-FS Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the GT-BC3090L are identified based on strict electrical and mechanical parameter matching:

Critical Matching Parameters:

• Voltage - DC Spark Over (Nominal): 90 V
• Impulse Discharge Current (8/20µs): 10000A (10kA)
• Tolerance: ±20%
• Number of Poles: 3
• Mounting Type: Through Hole
• Package / Case: Radial Cylinder, 3 Lead

The substitute part GTCR37-900M-R10-FS meets all critical electrical specifications and mechanical requirements. Both components share identical spark-over voltage, impulse discharge current rating, tolerance band, pole configuration, mounting method, and package form factor. These parameters define functional equivalence for surge protection circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: GTCR37-900M-R10-FS (Littelfuse Inc.)

The GTCR37-900M-R10-FS is the qualified substitute for the GT-BC3090L. Selection rationale:

• All electrical parameters match exactly: 90V DC spark-over voltage, 10kA impulse discharge current, ±20% tolerance
• Mechanical compatibility confirmed: 3-pole through-hole configuration, radial cylinder package with 3-lead form factor
• Both components maintain ROHS3 compliance and MSL 1 rating
• The substitute part is in active production status, ensuring supply chain availability
• Regulatory compliance (ECCN EAR99, HTSUS 8536.30.8000) is identical between both parts

The GTCR37-900M-R10-FS provides direct functional replacement for the obsolete GT-BC3090L in surge protection applications without circuit redesign or PCB modification.

Frequently Asked Questions (FAQ)

Q: Can the GTCR37-900M-R10-FS directly replace the GT-BC3090L in existing designs?

A: Yes. Both components share identical electrical specifications (90V spark-over, 10kA impulse current, ±20% tolerance) and mechanical form factors (3-pole through-hole, radial cylinder package). Direct substitution is supported without circuit modification.

Q: What is the significance of the 90V DC spark-over voltage specification?

A: The 90V DC spark-over voltage defines the threshold at which the gas discharge tube ionizes and conducts, providing surge protection. Both the GT-BC3090L and GTCR37-900M-R10-FS trigger at this identical voltage level, ensuring equivalent protection performance.

Q: Why is the 10kA impulse discharge current rating important?

A: The 10kA (8/20µs) impulse discharge current rating specifies the maximum surge current the component can safely conduct during a transient event. Matching this parameter ensures equivalent surge handling capacity and system protection integrity.

Q: Are there differences in packaging between these parts?

A: Both components use radial cylinder packages with 3-lead through-hole configuration. The GT-BC3090L is supplied in standard packaging, while the GTCR37-900M-R10-FS is supplied in tray packaging. Both are suitable for through-hole PCB assembly.

Q: What does the ±20% tolerance specification mean?

A: The ±20% tolerance applies to the DC spark-over voltage specification. This means the actual spark-over voltage for individual units may vary within a ±20% band around the 90V nominal value. Both parts share this identical tolerance specification.

Q: Is the GTCR37-900M-R10-FS compliant with current regulatory standards?

A: Yes. The GTCR37-900M-R10-FS maintains ROHS3 compliance, MSL 1 rating, and is classified as REACH Unaffected. These certifications match the GT-BC3090L specifications.

Q: Why is the GT-BC3090L listed as obsolete?

A: Obsolete status indicates the part is no longer manufactured by Lumex Opto/Components Inc. The GTCR37-900M-R10-FS from Littelfuse Inc. is an active production equivalent that fulfills the same functional requirements.