CDL4U(I.S)/W Terminal Block Equivalent & Substitute Parts

Part Overview

The CDL4U(I.S)/W is a 4-position, 2-level feed-through terminal block manufactured by Altech Corporation, rated for 35A at 600V (UL) and 32A at 400V (IEC). This component is classified as obsolete, making identification of compatible substitutes essential for ongoing system maintenance and component procurement.

The obsolete status necessitates sourcing equivalent alternatives that maintain electrical and mechanical compatibility with existing installations while meeting current availability and compliance requirements.

Key Parameters

Parameter	CDL4U(I.S)/W
Number of Positions	4
Number of Levels	2
Type	Feed Through
Termination Style	Screw
Current Rating - UL	35 A
Voltage Rating - UL	600 V
Current Rating - IEC	32 A
Voltage Rating - IEC	400 V
Wire Gauge - AWG	10-22 AWG
Wire Gauge - mm²	0.5-4 mm²
Terminal Width	6.0 mm
Insulation Material	Polyamide (PA66), Nylon 6/6
Color	White
Stripping Length	9 mm

Substitute Part Grouping Explanation

Substitution compatibility for the CDL4U(I.S)/W is determined by the following critical parameters:

Electrical Ratings: Current and voltage ratings must meet or exceed the original specification (35A at 600V UL minimum)
Physical Configuration: 4-position, 2-level feed-through architecture with 6.0mm terminal width
Termination Method: Screw termination required for mechanical compatibility
Wire Gauge Compatibility: Support for 10-22 AWG (0.5-4 mm²) conductor range
Material Specification: Polyamide (PA66) insulation material
Mechanical Dimensions: Stripping length of 9mm

The CDL4UN(I.S)/W qualifies as a direct substitute based on matching all critical parameters while offering improved product status and compliance certifications.

Parameter Comparison

Parameter	CDL4U(I.S)/W	CDL4UN(I.S)/W	Compatibility
Number of Positions	4	4	Match
Number of Levels	2	2	Match
Type	Feed Through	Feed Through	Match
Termination Style	Screw	Screw	Match
Current Rating - UL	35 A	35 A	Match
Voltage Rating - UL	600 V	600 V	Match
Current Rating - IEC	32 A	32 A	Match
Voltage Rating - IEC	400 V	800 V	Substitute Exceeds
Wire Gauge - AWG	10-22 AWG	10-22 AWG	Match
Wire Gauge - mm²	0.5-4 mm²	0.2-4 mm²	Substitute Exceeds
Terminal Width	6.0 mm	6.0 mm	Match
Insulation Material	Polyamide (PA66), Nylon 6/6	Polyamide (PA66), Nylon 6/6	Match
Color	White	White	Match
Stripping Length	9 mm	9 mm	Match

Engineering Selection Recommendations

The CDL4UN(I.S)/W is the qualified substitute for the obsolete CDL4U(I.S)/W based on the following factors:

Product Status: The CDL4UN(I.S)/W maintains active product status with current manufacturing support, ensuring long-term availability and supply chain continuity.

Electrical Performance: The substitute meets all UL and IEC electrical ratings of the original part. The IEC voltage rating of 800V on the substitute exceeds the original 400V specification, providing additional safety margin in IEC-regulated applications.

Wire Gauge Range: The substitute supports an extended wire gauge range (0.2-4 mm²) compared to the original (0.5-4 mm²), offering greater flexibility for smaller conductor applications while maintaining full compatibility with the original specification range.

Compliance and Certifications: The CDL4UN(I.S)/W carries RoHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements for component procurement in regulated industries.

Mechanical Compatibility: All physical parameters—terminal width, stripping length, configuration, and insulation material—are identical, ensuring direct mechanical interchangeability in existing installations.

Frequently Asked Questions (FAQ)

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

A: Yes. The CDL4UN(I.S)/W is mechanically and electrically compatible with the CDL4U(I.S)/W. All critical parameters including position count, level configuration, terminal width, wire gauge range, and screw termination are identical. The substitute meets or exceeds all electrical ratings.

Q: What is the difference in voltage rating between the two parts?

A: The CDL4U(I.S)/W is rated for 400V IEC, while the CDL4UN(I.S)/W is rated for 800V IEC. Both are rated for 600V UL. The higher IEC voltage rating on the substitute provides additional safety margin and does not affect compatibility.

Q: Are there differences in wire gauge compatibility?

A: The CDL4UN(I.S)/W supports wire gauges from 0.2-4 mm², while the CDL4U(I.S)/W supports 0.5-4 mm². The substitute accommodates smaller conductors. Both parts fully support the original 10-22 AWG specification.

Q: What packaging is available for the CDL4UN(I.S)/W?

A: The CDL4UN(I.S)/W is supplied in bulk packaging, with 963 pieces currently in stock as new original inventory.

Q: Does the CDL4UN(I.S)/W meet current environmental compliance standards?

A: Yes. The CDL4UN(I.S)/W is RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for component procurement.

Q: Are the insulation materials identical between the two parts?

A: Yes. Both the CDL4U(I.S)/W and CDL4UN(I.S)/W use Polyamide (PA66) Nylon 6/6 insulation material.

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