CZ400-040 RF EMI Absorbing Sheet Equivalent & Substitute Parts

Part Overview

The CZ400-040 is an RF EMI absorbing sheet manufactured by Laird Technologies EMI, part of the CoolZorb series. This component is a silicone elastomer-based electromagnetic interference absorbing material with dimensions of 12.000" × 12.000" × 0.040" (304.80mm × 304.80mm × 1.02mm). The product is classified as obsolete, necessitating identification of active equivalent alternatives for continued procurement and system integration. The CZ400-040 operates across a temperature range of -40°C to 175°C and is suitable for RF shielding applications requiring flexible absorbing materials.

Substiute Parts

CZ400-040

Laird Technologies EMIIn Stock: 729CZ400-040 Datasheet

Current PartRFQ

A17553-040

Laird Technologies EMIIn Stock: 1069A17553-040 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CZ400-040 is determined by the following critical parameters:

Thickness Compatibility: The substitute part must maintain the 0.040" (1.02mm) thickness specification to ensure equivalent electromagnetic absorption characteristics and mechanical fit within existing designs.

Operating Temperature Range: The substitute must support the -40°C to 175°C operating temperature range to maintain performance across the intended application environment.

Material Composition: The substitute must utilize compatible material properties for RF EMI absorption. The CZ400-040 uses silicone elastomer; substitutes must provide equivalent electromagnetic performance.

Series Continuity: Parts within the CoolZorb product family maintain consistent absorption performance characteristics across different dimensional configurations.

Product Status: Active product status ensures ongoing availability, technical support, and supply chain reliability compared to obsolete components.

The identified substitute part A17553-040 satisfies these critical parameters through identical thickness (0.040"), matching operating temperature range (-40°C to 175°C), and active product status within the CoolZorb 400 series.

Parameter Comparison

Engineering Selection Recommendations

For Direct Substitution: The A17553-040 is the qualified substitute for the CZ400-040 based on matching thickness (0.040"), identical operating temperature range (-40°C to 175°C), and active product status. Both components are classified under ECCN EAR99 and maintain compatibility with existing RF EMI absorption requirements.

Compliance Advantage: The A17553-040 provides ROHS3 compliance and REACH unaffected status, offering enhanced regulatory alignment compared to the obsolete CZ400-040. This substitution supports long-term supply chain sustainability and regulatory compliance objectives.

Dimensional Consideration: The A17553-040 provides larger sheet dimensions (18.000" × 18.000" versus 12.000" × 12.000"). Applications requiring the exact 12.000" × 12.000" footprint may require cutting or trimming of the substitute material to fit existing mechanical constraints. The identical 0.040" thickness ensures absorption performance remains equivalent after dimensional modification.

Shelf Life: The A17553-040 includes a 24-month shelf life specification (from date of shipment), providing defined storage parameters for inventory management.

Frequently Asked Questions (FAQ)

Q: Can the A17553-040 directly replace the CZ400-040 in existing designs?

A: The A17553-040 is electromagnetically and thermally equivalent to the CZ400-040 due to identical thickness (0.040") and operating temperature range (-40°C to 175°C). However, the larger sheet dimensions (18.000" × 18.000" versus 12.000" × 12.000") require mechanical accommodation. If the design requires the exact 12.000" × 12.000" footprint, the substitute material can be cut to specification while maintaining absorption performance.

Q: What is the primary reason for substitution?

A: The CZ400-040 is classified as obsolete, limiting future procurement availability and technical support. The A17553-040 is an active product within the CoolZorb 400 series, ensuring ongoing supply chain access and manufacturer support.

Q: Are the electromagnetic absorption characteristics identical?

A: Both components share the same thickness (0.040") and material family (silicone elastomer-based RF absorbers within the CoolZorb series). Thickness is the primary determinant of absorption performance in RF EMI absorbing sheets. Identical thickness ensures equivalent absorption characteristics.

Q: What compliance advantages does the substitute provide?

A: The A17553-040 is ROHS3 compliant and REACH unaffected, whereas the CZ400-040 compliance status is not specified. This substitution enhances regulatory alignment for applications subject to ROHS3 and REACH requirements.

Q: How should dimensional differences be addressed in mechanical design?

A: The A17553-040 sheet can be cut or trimmed to the required 12.000" × 12.000" dimensions without affecting the 0.040" thickness specification. Cutting should be performed using appropriate methods for silicone elastomer materials to maintain edge integrity and absorption performance.

Q: Is packaging different between the two parts?

A: The CZ400-040 packaging is not specified. The A17553-040 is supplied in box packaging. Confirm packaging requirements with procurement specifications for your application.