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

Part Overview

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

Substiute Parts

CDL4U(I.S)/G

Altech CorporationIn Stock: 1214CDL4U(I.S)/G Datasheet

Current PartRFQ

CDL4UN(I.S)/G

Altech CorporationIn Stock: 1028CDL4UN(I.S)/G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

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

• Electrical Compatibility: Current rating (UL/IEC), voltage rating (UL/IEC), and wire gauge range must meet or exceed the original specification
• Mechanical Compatibility: Number of positions (4), number of levels (2), terminal width (6.0 mm), and termination style (screw) must be identical
• Physical Compatibility: Insulation material (Polyamide PA66/Nylon 6/6), color (green), and stripping length (9 mm) must match
• Regulatory Status: Active product status and applicable compliance certifications ensure ongoing availability and support

The CDL4UN(I.S)/G meets all substitution criteria as an active equivalent part.

Parameter Comparison

Engineering Selection Recommendations

The CDL4UN(I.S)/G is the direct equivalent for the obsolete CDL4U(I.S)/G. Selection of this substitute is based on:

• Identical Mechanical Interface: All dimensional and positional parameters match, ensuring direct replacement in existing assemblies
• Equivalent Electrical Performance: Current and voltage ratings are identical for UL standards; IEC voltage rating is higher (800V vs. 400V), providing additional margin
• Active Product Status: The substitute is currently in active production, ensuring long-term availability and supply chain continuity
• Enhanced Compliance: ROHS3 compliance certification on the substitute provides regulatory advantage for new designs and system updates
• Expanded Wire Gauge Range: The substitute accommodates wire gauges down to 0.2 mm² (vs. 0.5 mm² minimum on the original), offering greater flexibility for smaller conductor applications

Frequently Asked Questions (FAQ)

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

A: Yes. The CDL4UN(I.S)/G is mechanically and electrically compatible with the CDL4U(I.S)/G. All critical parameters—position count, level configuration, terminal width, screw termination, current/voltage ratings, wire gauge range, insulation material, color, and stripping length—are identical or exceed the original specification.

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

A: The CDL4U(I.S)/G is rated for 400V (IEC) and 600V (UL). The CDL4UN(I.S)/G is rated for 800V (IEC) and 600V (UL). The substitute provides higher IEC voltage margin while maintaining identical UL performance.

Q: Does the substitute support smaller wire gauges?

A: Yes. The CDL4UN(I.S)/G accommodates wire gauges from 0.2–4 mm², compared to 0.5–4 mm² on the original part. This expanded range allows connection of smaller conductors when required.

Q: Is the substitute RoHS compliant?

A: Yes. The CDL4UN(I.S)/G carries ROHS3 compliance certification. The original CDL4U(I.S)/G does not specify RoHS status.

Q: Are there packaging differences between the two parts?

A: The CDL4U(I.S)/G packaging is not specified in the original documentation. The CDL4UN(I.S)/G is supplied in bulk packaging.

Q: What is the base product number for the substitute?

A: The base product number for the CDL4UN(I.S)/G is CDL4, indicating it belongs to the same terminal block family as the original part.