CT-33 Equivalent & Substitute Parts Reference

Part Overview

The CT-33 is a 33-circuit barrier block connector manufactured by Curtis Industries, designed for chassis and panel mounting applications. This component features dual-wall barrier construction with screw termination on top and closed termination on the bottom, rated for 30A at 600V with wire gauge compatibility of 10-22 AWG.

The CT-33 carries an obsolete product status. Identifying equivalent substitute parts ensures continued availability for maintenance, repair, and replacement applications where this connector type is specified in existing designs.

Substiute Parts

CT-33

Curtis IndustriesIn Stock: 1055CT-33 Datasheet

Current PartRFQ

CDM-33

Curtis IndustriesIn Stock: 1103CDM-33 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CT-33 is determined by strict equivalence across the following critical parameters:

• Number of circuits: 33
• Pitch spacing: 0.546" (13.86mm)
• Current rating: 30A
• Voltage rating: 600V
• Wire gauge range: 10-22 AWG
• Termination type: Screw top, closed bottom
• Barrier configuration: 2 Wall (Dual)
• Mounting compatibility: Chassis and panel mounting
• Operating temperature: 130°C
• Insulation material: Polyester Thermoplastic
• Flammability rating: UL94 V-0

The CDM-33 meets all these criteria and qualifies as a direct substitute for the obsolete CT-33.

Parameter Comparison

Engineering Selection Recommendations

The CDM-33 is the direct substitute for the obsolete CT-33. Both components are manufactured by Curtis Industries and maintain identical electrical and mechanical specifications across all critical parameters.

The CDM-33 carries active product status, ensuring ongoing availability and supply chain continuity. The CDM-33 meets ROHS3 compliance, representing an updated regulatory standard compared to the CT-33's RoHS compliance designation. Both components satisfy REACH requirements and carry identical export classification (EAR99).

Selection of the CDM-33 for replacement applications eliminates obsolescence risk while maintaining full functional and dimensional compatibility with existing designs specified for the CT-33.

Frequently Asked Questions (FAQ)

Q: Can the CDM-33 be used as a direct replacement for the CT-33 in existing applications?

A: Yes. The CDM-33 matches all electrical ratings (30A, 600V), mechanical dimensions (33 circuits, 0.546" pitch), termination configuration (screw top, closed bottom), and environmental specifications (130°C operating temperature, UL94 V-0 flammability rating) of the CT-33. No design modifications are required.

Q: What is the primary difference between the CT-33 and CDM-33?

A: The CT-33 is obsolete, while the CDM-33 is an active product. The CDM-33 also carries ROHS3 compliance versus the CT-33's RoHS compliance. All functional and electrical parameters remain identical.

Q: Are there packaging differences between these parts?

A: The CT-33 packaging designation is not specified in the available data. The CDM-33 is supplied in bulk packaging. Confirm packaging requirements with your procurement specifications.

Q: Do both parts meet the same regulatory standards?

A: Both the CT-33 and CDM-33 are UL94 V-0 rated, REACH unaffected, and classified as EAR99 for export purposes. The CDM-33 carries the updated ROHS3 compliance designation.

Q: What wire gauge range is supported?

A: Both the CT-33 and CDM-33 accept wire gauges from 10 AWG to 22 AWG, providing compatibility across standard industrial wiring specifications.