CT-43 Equivalent & Substitute Parts Reference

Part Overview

The CT-43 is a 43-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 the top and closed termination on the bottom. The CT-43 is classified as obsolete, making identification of active equivalent parts essential for ongoing system maintenance and component procurement.

Substiute Parts

CT-43

Curtis IndustriesIn Stock: 791CT-43 Datasheet

Current PartRFQ

CDM-43

Curtis IndustriesIn Stock: 853CDM-43 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The CDM-43 qualifies as a direct equivalent to the CT-43 based on the following critical parameters that determine substitution compatibility:

• Number of Circuits: Both parts feature 43 circuits
• Pitch Spacing: Identical 0.546" (13.86mm) pitch
• Electrical Ratings: Matching 30A current rating and 600V voltage rating
• Wire Gauge Compatibility: Both accept 10-22 AWG wire
• Termination Configuration: Identical screw top termination and closed bottom termination
• Barrier Construction: Both utilize 2-wall dual barrier design
• Mounting Interface: Both support chassis and panel mounting
• Thermal Performance: Identical 130°C operating temperature rating
• Insulation Material: Both use polyester thermoplastic
• Safety Certification: Both meet UL94 V-0 flammability requirements

The primary distinction is product status: CT-43 is obsolete while CDM-43 is active, making CDM-43 the recommended procurement choice for new applications and replacements.

Parameter Comparison

Engineering Selection Recommendations

The CDM-43 is the appropriate selection for applications currently using or requiring CT-43 components. Both parts maintain identical electrical, mechanical, and thermal specifications, ensuring direct functional compatibility in existing designs.

The CDM-43 carries active product status with ROHS3 compliance, providing assurance of ongoing availability and regulatory alignment with current environmental standards. The CT-43, classified as obsolete, presents supply chain risk and should be replaced with CDM-43 in new designs and maintenance applications.

Both components meet UL94 V-0 flammability requirements and maintain REACH unaffected status, supporting deployment in regulated environments. The MSL rating of 1 (Unlimited) for both parts indicates minimal moisture sensitivity, simplifying storage and handling requirements.

Frequently Asked Questions (FAQ)

Q: Can CDM-43 be used as a direct replacement for CT-43?

A: Yes. The CDM-43 provides identical electrical ratings (30A, 600V), mechanical configuration (43 circuits, 0.546" pitch), termination method (screw top, closed bottom), and thermal performance (130°C). Physical mounting interfaces and wire gauge compatibility (10-22 AWG) are identical.

Q: What is the primary reason to transition from CT-43 to CDM-43?

A: The CT-43 is classified as obsolete, creating procurement and supply chain challenges. The CDM-43 is an active product with confirmed ongoing availability and current compliance certifications.

Q: Are there packaging differences between CT-43 and CDM-43?

A: The CT-43 packaging specification is not provided in the technical data. The CDM-43 is supplied in bulk packaging. Confirm packaging requirements with your procurement department.

Q: Do both parts meet the same safety and environmental standards?

A: Both parts meet UL94 V-0 flammability requirements and maintain REACH unaffected status. The CDM-43 carries ROHS3 compliance while the CT-43 is RoHS compliant, both satisfying current regulatory requirements.

Q: Are there any thermal or electrical performance differences?

A: No. Both parts operate at 130°C maximum temperature and maintain identical 30A current and 600V voltage ratings across all circuit configurations.