GTCA28-151M-P15 Gas Discharge Tube Equivalent & Substitute Parts

Part Overview

The GTCA28-151M-P15 is a 2-pole gas discharge tube (GDT) manufactured by Littelfuse, rated for 150V DC spark-over voltage with 15kA impulse discharge current. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design support and procurement.

Substiute Parts

GTCA28-151M-P15

LittelfuseIn Stock: 1096GTCA28-151M-P15 Datasheet

Current PartRFQ

CG2145LTR

Littelfuse Inc.In Stock: 959CG2145LTR Datasheet

DirectRFQ

GTCA28-151M-R20

Littelfuse Inc.In Stock: 2671GTCA28-151M-R20 Datasheet

DirectRFQ

CG2145L

Littelfuse Inc.In Stock: 2543CG2145L Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the GTCA28-151M-P15 is determined by the following critical parameters:

• Voltage Rating (DC Spark Over): 150V nominal
• Impulse Discharge Current: 15kA minimum
• Number of Poles: 2-pole configuration
• Mounting Type: Through Hole
• Package Type: Axial Cylinder
• Fail Mode: No fail short

The substitute parts identified maintain compatibility across these core electrical and mechanical parameters. GTCA28-151M-R20 provides identical voltage and pole configuration with increased current capacity (20kA). CG2145L and CG2145LTR operate at 145V with 20kA discharge current, representing a voltage reduction of 5V with enhanced current handling. All substitutes maintain 2-pole through-hole axial cylinder packaging and no fail-short characteristics.

Parameter Comparison

Engineering Selection Recommendations

GTCA28-151M-R20 is the primary direct substitute, maintaining identical 150V DC spark-over voltage and 2-pole through-hole configuration while providing increased impulse discharge current capacity (20kA vs. 15kA). This part is active and ROHS3 compliant with higher inventory availability (2661 units).

CG2145L and CG2145LTR are manufacturer-recommended alternatives from the CG2 series, operating at 145V with 20kA discharge current. Both are active products with ROHS3 compliance and REACH Unaffected status. CG2145L is supplied in tray packaging, while CG2145LTR is available in tape & reel format for automated assembly applications.

All substitute parts maintain the required 2-pole through-hole axial cylinder package configuration and no fail-short characteristic. Selection should account for specific voltage tolerance requirements and packaging format compatibility with assembly processes.

Frequently Asked Questions (FAQ)

Q: Can GTCA28-151M-R20 directly replace GTCA28-151M-P15?

A: Yes. Both parts maintain 150V DC spark-over voltage, 2-pole configuration, through-hole mounting, and axial cylinder packaging. GTCA28-151M-R20 provides increased impulse discharge current (20kA vs. 15kA) and is an active product.

Q: What is the voltage difference between GTCA28-151M-P15 and CG2145L/CG2145LTR?

A: CG2145L and CG2145LTR operate at 145V nominal spark-over voltage, representing a 5V reduction from the original 150V rating. Both provide 20kA impulse discharge current.

Q: Are there packaging differences between the substitute parts?

A: Yes. GTCA28-151M-R20 is supplied in tray packaging. CG2145L is also tray-packaged, while CG2145LTR is supplied in tape & reel format for automated pick-and-place assembly.

Q: Do all substitute parts meet RoHS and REACH requirements?

A: All substitute parts are ROHS3 compliant. CG2145L and CG2145LTR are REACH Unaffected. GTCA28-151M-R20 has Vendor Undefined REACH status.

Q: What is the impulse discharge current difference between the original part and substitutes?

A: GTCA28-151M-P15 is rated for 15kA. GTCA28-151M-R20, CG2145L, and CG2145LTR are all rated for 20kA, providing higher surge current handling capability.