CDL4U(I.S) Terminal Block Connector - Equivalent & Substitute Parts

Part Overview

The CDL4U(I.S) is a 4-position feed-through terminal block connector manufactured by Altech Corporation, designed for applications requiring screw termination of 10-22 AWG conductors. This component operates at IEC ratings of 32 A / 400 V and UL ratings of 35 A / 600 V, with a 6.0 mm terminal width and dual-level configuration.

The CDL4U(I.S) is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades where this connector type is specified.

Key Parameters

Parameter	Value
Manufacturer	Altech Corporation
Category	Terminal Blocks
Type	Feed Through
Number of Positions	4
Number of Levels	2
Terminal Width	6.0 mm
Termination Style	Screw
Wire Gauge Range (AWG)	10-22 AWG
Wire Gauge Range (mm²)	0.5-4 mm²
Current Rating (IEC)	32 A
Voltage Rating (IEC)	400 V
Current Rating (UL)	35 A
Voltage Rating (UL)	600 V
Insulation Material	Polyamide (PA66), Nylon 6/6
Stripping Length	9 mm
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the CDL4U(I.S) is determined by strict equivalence across the following critical parameters:

Connector Type & Configuration: Feed-through terminal block with 4 positions and 2 levels
Terminal Dimensions: 6.0 mm terminal width for mechanical compatibility
Termination Method: Screw termination for identical installation procedures
Electrical Ratings: Current and voltage ratings must meet or exceed IEC 32 A / 400 V and UL 35 A / 600 V specifications
Wire Gauge Compatibility: Support for 10-22 AWG (0.5-4 mm²) conductor range
Insulation Material: Polyamide (PA66) / Nylon 6/6 composition
Stripping Length: 9 mm requirement for proper termination

The CDL4UN(I.S) satisfies all substitution criteria and is classified as an active product, providing long-term availability and supply chain stability.

Parameter Comparison

Parameter	CDL4U(I.S)	CDL4UN(I.S)	Compatibility
Manufacturer	Altech Corporation	Altech Corporation	Identical
Type	Feed Through	Feed Through	Identical
Number of Positions	4	4	Identical
Number of Levels	2	2	Identical
Terminal Width	6.0 mm	6.0 mm	Identical
Termination Style	Screw	Screw	Identical
Wire Gauge Range (AWG)	10-22 AWG	10-22 AWG	Identical
Wire Gauge Range (mm²)	0.5-4 mm²	0.2-4 mm²	Compatible (CDL4UN(I.S) supports extended lower range)
Current Rating (IEC)	32 A	32 A	Identical
Voltage Rating (IEC)	400 V	800 V	Compatible (CDL4UN(I.S) exceeds requirement)
Current Rating (UL)	35 A	35 A	Identical
Voltage Rating (UL)	600 V	600 V	Identical
Insulation Material	Polyamide (PA66), Nylon 6/6	Polyamide (PA66), Nylon 6/6	Identical
Stripping Length	9 mm	9 mm	Identical
Product Status	Obsolete	Active	CDL4UN(I.S) provides active production status
RoHS Status	Not specified	ROHS3 Compliant	CDL4UN(I.S) meets current compliance requirements
REACH Status	Not specified	REACH Unaffected	CDL4UN(I.S) meets current compliance requirements

Engineering Selection Recommendations

The CDL4UN(I.S) is the direct substitute for the obsolete CDL4U(I.S). Selection is based on the following engineering criteria:

Product Status & Availability: The CDL4UN(I.S) maintains active production status, ensuring reliable long-term component availability and supply chain continuity compared to the obsolete CDL4U(I.S).

Electrical & Mechanical Equivalence: The CDL4UN(I.S) maintains identical electrical ratings (IEC 32 A / 400 V, UL 35 A / 600 V) and mechanical specifications (4-position, 2-level, 6.0 mm terminal width, screw termination). Wire gauge compatibility remains unchanged at 10-22 AWG.

Enhanced Electrical Performance: The CDL4UN(I.S) provides an increased IEC voltage rating of 800 V compared to the 400 V specification of the CDL4U(I.S), offering additional design margin without compromising compatibility.

Regulatory Compliance: The CDL4UN(I.S) is certified as ROHS3 Compliant and REACH Unaffected, meeting current regulatory requirements for new product designs and manufacturing.

Extended Wire Gauge Support: The CDL4UN(I.S) supports wire gauges from 0.2-4 mm², extending the lower gauge range compared to the CDL4U(I.S) specification of 0.5-4 mm².

Frequently Asked Questions (FAQ)

Q: Can the CDL4UN(I.S) be used as a direct replacement for the CDL4U(I.S) in existing designs?

A: Yes. The CDL4UN(I.S) maintains identical electrical ratings, mechanical dimensions, and termination specifications. No design modifications are required for direct substitution.

Q: What is the difference between the CDL4U(I.S) and CDL4UN(I.S)?

A: Both connectors are 4-position, 2-level feed-through terminal blocks with 6.0 mm terminal width and screw termination. The primary differences are: (1) CDL4UN(I.S) is active production versus CDL4U(I.S) obsolete status, (2) CDL4UN(I.S) has IEC voltage rating of 800 V versus 400 V, (3) CDL4UN(I.S) supports wire gauges from 0.2-4 mm² versus 0.5-4 mm², and (4) CDL4UN(I.S) carries ROHS3 and REACH compliance certifications.

Q: Are the terminal widths and stripping lengths identical?

A: Yes. Both the CDL4U(I.S) and CDL4UN(I.S) have 6.0 mm terminal width and 9 mm stripping length, ensuring mechanical and installation compatibility.

Q: What wire gauges are supported by the CDL4UN(I.S)?

A: The CDL4UN(I.S) supports 10-22 AWG conductors, equivalent to 0.2-4 mm² cross-section. This range includes the original CDL4U(I.S) specification of 0.5-4 mm².

Q: Does the CDL4UN(I.S) meet current regulatory requirements?

A: Yes. The CDL4UN(I.S) is ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory standards for electronic components.

Q: What is the current rating of the CDL4UN(I.S)?

A: The CDL4UN(I.S) is rated for 32 A (IEC) and 35 A (UL), identical to the CDL4U(I.S) specification.

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