CT-3 Equivalent & Substitute Parts Reference

Part Overview

The CT-3 is a 3-circuit barrier block connector manufactured by Curtis Industries, designed for chassis and panel mounting applications requiring secure screw-based termination. This component features dual-wall barrier construction with a 0.546" (13.86mm) pitch and supports wire gauges from 10-22 AWG at 30A and 600V ratings.

The CT-3 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain system functionality and ensure continued availability for replacement, repair, and new design implementations where this connector type is specified.

Substiute Parts

CT-3

Curtis IndustriesIn Stock: 995CT-3 Datasheet

Current PartRFQ

CDM-3

Curtis IndustriesIn Stock: 920CDM-3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CT-3 is determined by strict equivalence across the following critical parameters:

• Terminal block type (Barrier Block)
• Number of circuits (3)
• Pitch specification (0.546" / 13.86mm)
• Current rating (30A minimum)
• Voltage rating (600V minimum)
• Wire gauge compatibility (10-22 AWG)
• Top termination method (Screws)
• Barrier construction (2 Wall / Dual)
• Mounting configuration (Chassis, Panel)
• Operating temperature (130°C minimum)
• Insulation material (Polyester Thermoplastic)
• Flammability rating (UL94 V-0)

The CDM-3 meets all specified parameters and qualifies as a direct substitute. The primary distinction is product status: CT-3 is obsolete while CDM-3 is active, making CDM-3 the recommended selection for new procurement and ongoing applications.

Parameter Comparison

Engineering Selection Recommendations

The CDM-3 is the qualified substitute for the CT-3 based on complete electrical and mechanical parameter equivalence. Both components are manufactured by Curtis Industries and maintain identical specifications across all critical performance criteria: 3-circuit configuration, 0.546" pitch, 30A/600V ratings, 10-22 AWG wire gauge support, dual-wall barrier construction, and UL94 V-0 flammability compliance.

The CDM-3 carries active product status and ROHS3 compliance, providing assurance of ongoing availability and regulatory alignment. The CT-3, classified as obsolete, should be replaced with CDM-3 for all new designs, procurement activities, and system replacements where this connector type is required.

Both components satisfy identical environmental and compliance requirements, including REACH unaffected status and EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can CDM-3 be used as a direct replacement for CT-3 in existing applications?

A: Yes. The CDM-3 meets all electrical and mechanical specifications of the CT-3, including current rating, voltage rating, wire gauge compatibility, pitch, circuit count, and mounting configuration. No design modifications are required.

Q: What is the primary reason to transition from CT-3 to CDM-3?

A: The CT-3 is obsolete, while CDM-3 is an active product. CDM-3 ensures continued component availability, supply chain reliability, and compliance with current regulatory standards.

Q: Are there packaging differences between CT-3 and CDM-3?

A: CT-3 is supplied in standard packaging, while CDM-3 is supplied in bulk packaging. Both formats contain identical components with no functional differences.

Q: Do both parts meet the same compliance standards?

A: Yes. Both CT-3 and CDM-3 are RoHS compliant, REACH unaffected, UL94 V-0 rated, and classified as EAR99 for export purposes.

Q: What wire gauge range is supported by both connectors?

A: Both CT-3 and CDM-3 support wire gauges from 10-22 AWG, accommodating a wide range of conductor sizes within the specified current and voltage ratings.

Q: Is the barrier construction identical between the two parts?

A: Yes. Both components feature 2-wall (dual) barrier construction with flange and marking strip features, providing equivalent electrical isolation and mechanical stability.