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CT-26 Equivalent & Substitute Parts Reference
Part Overview
The CT-26 is a 26-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-26 is classified as obsolete. 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
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | CT-26 |
| Manufacturer | Curtis Industries |
| Category | Terminal Blocks |
| Terminal Block Type | Barrier Block |
| Number of Circuits | 26 |
| Pitch | 0.546" (13.86mm) |
| Current Rating | 30A |
| Voltage Rating | 600V |
| Wire Gauge | 10-22 AWG |
| Top Termination | Screws |
| Barrier Type | 2 Wall (Dual) |
| Mounting Type | Chassis, Panel |
| Operating Temperature | 130°C |
| Material - Insulation | Polyester Thermoplastic |
| Flammability Rating | UL94 V-0 |
Substitute Part Grouping Explanation
The CDM-26 qualifies as a direct substitute for the CT-26 based on the following critical parameters that determine functional equivalence:
- Circuit Configuration: Both parts provide 26 circuits with 52 wire entries
- Electrical Ratings: Identical 30A current rating and 600V voltage rating
- Mechanical Compatibility: Matching 0.546" (13.86mm) pitch and 2-row configuration
- Termination Method: Both use screw-based top termination with closed bottom termination
- Barrier Construction: Both feature dual-wall (2 Wall) barrier design
- Wire Gauge Compatibility: Both accept 10-22 AWG wire
- Environmental Specifications: Matching 130°C operating temperature and UL94 V-0 flammability rating
- Compliance: Both are RoHS compliant and REACH unaffected
The primary distinction is product status: CT-26 is obsolete while CDM-26 is active, making CDM-26 the recommended source for new procurement.
Parameter Comparison
| Parameter | CT-26 | CDM-26 |
|---|---|---|
| Manufacturer | Curtis Industries | Curtis Industries |
| Terminal Block Type | Barrier Block | Barrier Block |
| Number of Circuits | 26 | 26 |
| Number of Wire Entries | 52 | 52 |
| Pitch | 0.546" (13.86mm) | 0.546" (13.86mm) |
| Number of Rows | 2 | 2 |
| Current Rating (Amps) | 30A | 30A |
| Voltage Rating | 600V | 600V |
| Wire Gauge | 10-22 AWG | 10-22 AWG |
| Top Termination | Screws | Screws |
| Bottom Termination | Closed | Closed |
| Barrier Type | 2 Wall (Dual) | 2 Wall (Dual) |
| Features | Flange, Marking Strip | Flange, Marking Strip |
| Mounting Type | Chassis, Panel | Chassis, Panel |
| Operating Temperature | 130°C | 130°C |
| Material - Insulation | Polyester Thermoplastic | Polyester Thermoplastic |
| Flammability Rating | UL94 V-0 | UL94 V-0 |
| RoHS Status | RoHS Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) |
| REACH Status | REACH Unaffected | REACH Unaffected |
| Product Status | Obsolete | Active |
Engineering Selection Recommendations
The CDM-26 is the appropriate substitute for the CT-26 in all applications where the CT-26 was previously specified. Both components meet identical electrical and mechanical requirements, with full parameter alignment across all critical specifications.
The CDM-26 offers the advantage of active product status, ensuring ongoing availability and supply chain continuity. Both parts maintain equivalent compliance certifications including RoHS compliance and REACH unaffected status, with matching UL94 V-0 flammability ratings suitable for safety-critical applications.
For new designs and replacement applications, CDM-26 should be selected as the primary component. Existing installations using CT-26 can be retrofitted with CDM-26 without modification to mounting hardware, wiring practices, or system configuration.
Frequently Asked Questions (FAQ)
Q: Can CDM-26 be used as a direct replacement for CT-26 in existing installations?
A: Yes. The CDM-26 provides identical electrical ratings (30A, 600V), mechanical pitch (0.546"), circuit configuration (26 circuits), and termination method (screw-based). No modifications to mounting, wiring, or system design are required.
Q: What is the primary reason to substitute CT-26 with CDM-26?
A: The CT-26 is classified as obsolete. The CDM-26 is an active product from the same manufacturer with identical specifications, ensuring continued availability for procurement and replacement needs.
Q: Are there any compliance differences between CT-26 and CDM-26?
A: Both parts are RoHS compliant and REACH unaffected. The CDM-26 carries ROHS3 compliance while the CT-26 carries RoHS compliance. Both maintain UL94 V-0 flammability ratings. These differences do not affect functional equivalence or application suitability.
Q: What wire gauges are compatible with CDM-26?
A: The CDM-26 accepts wire gauges from 10-22 AWG, identical to the CT-26 specification.
Q: Are the packaging formats different between these parts?
A: The CT-26 packaging is not specified in available data. The CDM-26 is supplied in bulk packaging. Packaging format does not affect electrical or mechanical compatibility.
Q: What is the operating temperature range for CDM-26?
A: The CDM-26 operates at a maximum temperature of 130°C, matching the CT-26 specification.
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