CT-27 Equivalent & Substitute Parts Reference

Part Overview

The CT-27 is a 27-circuit barrier block connector manufactured by Curtis Industries, designed for chassis and panel mounting applications requiring high-current distribution. 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 from 10-22 AWG.

The CT-27 carries an obsolete product status. Identifying equivalent substitute parts is necessary to maintain system functionality and ensure continued availability for replacement, repair, and new installations where this connector type is specified.

Substiute Parts

CT-27

Curtis IndustriesIn Stock: 697CT-27 Datasheet

Current PartRFQ

CDM-27

Curtis IndustriesIn Stock: 994CDM-27 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The CDM-27 qualifies as a direct substitute for the CT-27 based on the following critical parameters that determine functional equivalence:

• Number of Circuits: 27 (identical)
• Pitch: 0.546" (13.86mm) (identical)
• Current Rating: 30A (identical)
• Voltage Rating: 600V (identical)
• Wire Gauge: 10-22 AWG (identical)
• Top Termination: Screws (identical)
• Barrier Type: 2 Wall (Dual) (identical)
• Mounting Type: Chassis, Panel (identical)
• Operating Temperature: 130°C (identical)
• Material - Insulation: Polyester Thermoplastic (identical)
• Flammability Rating: UL94 V-0 (identical)

The CDM-27 maintains all electrical and mechanical specifications required for direct substitution. The primary distinction is product status: CT-27 is obsolete while CDM-27 is active, making CDM-27 the recommended source for new procurement.

Parameter Comparison

Engineering Selection Recommendations

The CDM-27 is the appropriate substitute for the CT-27 in all applications. Both components meet identical electrical and mechanical specifications, with full compliance to UL94 V-0 flammability standards and RoHS requirements. The CDM-27 carries active product status and ROHS3 compliance, providing assurance of continued manufacturing support and regulatory alignment.

For new designs and replacement applications, the CDM-27 should be specified. Existing installations using the CT-27 may continue operation without modification, as the CDM-27 maintains complete functional and dimensional compatibility.

Frequently Asked Questions (FAQ)

Q: Can the CDM-27 be used as a direct replacement for the CT-27 in existing assemblies?

A: Yes. The CDM-27 maintains identical electrical ratings (30A, 600V), mechanical dimensions (27 circuits at 0.546" pitch), termination method (screw top, closed bottom), and barrier construction (dual-wall). Physical mounting and wire entry specifications are identical, enabling direct substitution without design modification.

Q: What is the primary reason to transition from CT-27 to CDM-27?

A: The CT-27 is obsolete, while the CDM-27 is an active product. Transitioning to CDM-27 ensures continued availability for procurement, repair, and future production requirements.

Q: Are there any compliance differences between CT-27 and CDM-27?

A: Both components are RoHS compliant and REACH unaffected. The CDM-27 carries ROHS3 certification, representing the current regulatory standard. Both maintain UL94 V-0 flammability rating and identical moisture sensitivity levels.

Q: What wire gauges are compatible with the CDM-27?

A: The CDM-27 accepts wire gauges from 10-22 AWG, identical to the CT-27 specification.

Q: Are packaging differences between CT-27 and CDM-27 significant for component selection?

A: The CT-27 is packaged individually, while the CDM-27 is supplied in bulk packaging. This distinction affects procurement and inventory management but does not impact electrical or mechanical performance.