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

Part Overview

The CDL4U(I.S)/O 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.

The obsolete status necessitates sourcing alternative components that maintain electrical and mechanical compatibility with existing installations while offering access to current inventory and active product support.

Substiute Parts

CDL4U(I.S)/O

Altech CorporationIn Stock: 893CDL4U(I.S)/O Datasheet

Current PartRFQ

CDL4UN(I.S)/O

Altech CorporationIn Stock: 849CDL4UN(I.S)/O Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDL4U(I.S)/O 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 Characteristics: Insulation material (Polyamide PA66/Nylon 6/6), color (orange), and stripping length (9 mm) must match
• Regulatory Status: Active product status with current certifications ensures ongoing availability and support

The CDL4UN(I.S)/O qualifies as a direct substitute based on matching all critical mechanical and electrical parameters while offering active product status.

Parameter Comparison

Engineering Selection Recommendations

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

Electrical Performance: The substitute maintains identical current and voltage ratings under UL standards (35 A / 600 V) and IEC standards (32 A / 400 V). The IEC voltage rating of the substitute (800 V) exceeds the original specification, providing additional margin in applications operating at the original 400 V IEC rating.

Mechanical Compatibility: All mechanical parameters are identical, including 4 positions, 2 levels, 6.0 mm terminal width, and screw termination. Physical dimensions and connector geometry ensure direct replacement capability.

Wire Gauge Compatibility: Both parts accept 10-22 AWG wire. The substitute's extended lower range (0.2-4 mm² versus 0.5-4 mm²) provides additional flexibility for smaller gauge applications while maintaining full compatibility with the original 0.5-4 mm² range.

Regulatory and Compliance Status: The CDL4UN(I.S)/O is an active product with ROHS3 compliance and REACH unaffected status, ensuring current manufacturing standards and ongoing availability. The original part's EAR99 ECCN classification is maintained.

Frequently Asked Questions (FAQ)

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

A: Yes. The substitute maintains identical electrical ratings (35 A / 600 V UL; 32 A / 400 V IEC), mechanical configuration (4 positions, 2 levels, 6.0 mm terminals), and physical dimensions. Direct substitution is supported without circuit modification.

Q: What is the significance of the higher IEC voltage rating (800 V) on the substitute part?

A: The CDL4UN(I.S)/O's 800 V IEC rating exceeds the original 400 V IEC specification. This provides additional safety margin in applications operating at the original voltage level and does not affect compatibility or performance in existing circuits.

Q: Are there packaging differences between the main part and substitute?

A: The CDL4U(I.S)/O is supplied in standard packaging, while the CDL4UN(I.S)/O is supplied in bulk packaging. Both formats contain identical components; packaging selection depends on procurement volume requirements.

Q: Does the extended wire gauge range (0.2-4 mm²) on the substitute affect compatibility?

A: No. The substitute's lower range limit (0.2 mm²) is an extension below the original specification (0.5 mm²). The original 0.5-4 mm² range is fully contained within the substitute's range, ensuring complete compatibility for all originally specified wire gauges.

Q: What certifications apply to the substitute part?

A: The CDL4UN(I.S)/O carries ROHS3 compliance and REACH unaffected status. Both parts share the same EAR99 ECCN classification and HTSUS code (8536.90.4000).