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

Part Overview

The CDL4U(I.S)/BU is a 4-position, 2-level feed-through terminal block connector manufactured by Altech Corporation, designed for screw termination of conductors in the 10-22 AWG range. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system maintenance and new design implementations where equivalent functionality is required.

Substiute Parts

CDL4U(I.S)/BU

Altech CorporationIn Stock: 904CDL4U(I.S)/BU Datasheet

Current PartRFQ

CDL4UN(I.S)/BU

Altech CorporationIn Stock: 1052CDL4UN(I.S)/BU Datasheet

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Key Parameters

Substitute Part Grouping Explanation

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

• Mechanical Compatibility: 4 positions, 2 levels, 6.0 mm terminal width, screw termination
• Electrical Performance: Current rating (IEC 32 A / UL 35 A), voltage rating (IEC 400 V / UL 600 V minimum)
• Wire Compatibility: 10-22 AWG wire gauge acceptance, 9 mm stripping length
• Physical Form Factor: Feed-through configuration, blue color, polyamide insulation material

The CDL4UN(I.S)/BU meets all substitution criteria within the allowed parameter tolerance range for this product category.

Parameter Comparison

Engineering Selection Recommendations

The CDL4UN(I.S)/BU is a direct substitute for the obsolete CDL4U(I.S)/BU. Both components share identical mechanical and electrical specifications across all critical parameters: 4-position, 2-level configuration, 6.0 mm terminal width, screw termination, 32 A IEC current rating, 35 A UL current rating, and 10-22 AWG wire gauge compatibility.

The CDL4UN(I.S)/BU offers the additional advantage of active product status, ensuring continued availability and supply chain reliability. The substitute part demonstrates enhanced compliance certifications, including ROHS3 compliance and REACH unaffected status, supporting modern regulatory requirements.

The IEC voltage rating of the substitute (800 V) exceeds the main part specification (400 V), providing additional safety margin in applications operating at or below 400 V IEC. All other electrical and mechanical parameters remain equivalent or superior.

Frequently Asked Questions (FAQ)

Q: Can CDL4UN(I.S)/BU be used as a direct replacement for CDL4U(I.S)/BU?

A: Yes. Both components are 4-position, 2-level feed-through terminal blocks with identical screw termination, 6.0 mm terminal width, and wire gauge compatibility (10-22 AWG). Electrical ratings are equivalent: 32 A IEC / 35 A UL current, 400 V IEC / 600 V UL voltage minimum.

Q: What is the difference in wire gauge acceptance between these parts?

A: The main part accepts 0.5-4 mm² wire cross-section, while the substitute accepts 0.2-4 mm². The substitute provides broader compatibility with smaller conductor sizes while maintaining full compatibility with the original specification range.

Q: Why is the IEC voltage rating different between the two parts?

A: The substitute part (CDL4UN(I.S)/BU) has an IEC voltage rating of 800 V compared to the main part's 400 V. This represents an enhanced specification that maintains full backward compatibility for applications operating at or below 400 V IEC.

Q: Are there packaging differences between these parts?

A: The main part packaging is not specified. The substitute is supplied in bulk packaging, which is standard for terminal block components in this category.

Q: What compliance certifications apply to the substitute part?

A: The CDL4UN(I.S)/BU is ROHS3 compliant and REACH unaffected. Both parts share the same ECCN (EAR99) and HTSUS code (8536.90.4000) classification.

Q: Is the stripping length identical for both parts?

A: Yes. Both the CDL4U(I.S)/BU and CDL4UN(I.S)/BU require 9 mm conductor stripping length for proper termination.