RF EMI Absorbing Sheet 85000077 Equivalent & Substitute Parts

Part Overview

The Laird Technologies EMI ECCOSORB® JCS 85000077 is a 12" × 12" RF EMI absorbing sheet with 0.060" thickness, designed for electromagnetic interference suppression applications. This part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility for RF EMI absorption in the same form factor and dimensional specifications.

Substiute Parts

85000077

Laird Technologies EMIIn Stock: 81485000077 Datasheet

Current PartRFQ

85005021

Laird Technologies EMIIn Stock: 70285005021 Datasheet

MFR RecommendedRFQ

85005061

Laird Technologies EMIIn Stock: 77885005061 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for RF EMI absorbing sheets is determined by the following parameters:

Dimensional Compatibility: Length, width, and shape must match the original specification to ensure mechanical fit within the application enclosure or assembly.

Thickness Consideration: The 85000077 features 0.060" (1.52mm) thickness. Substitute 85005021 offers reduced thickness at 0.020" (0.51mm), suitable for space-constrained applications while maintaining the same 12" × 12" footprint. Substitute 85005061 matches the original 0.060" (1.52mm) thickness exactly.

Material and Performance: Both substitutes utilize Silicone Elastomer material, consistent with RF EMI absorption requirements. The ECCOSORB® JCS-Next series represents the active product line evolution from the obsolete ECCOSORB® JCS series.

Adhesive Specification: The original 85000077 contains no adhesive. Substitute 85005021 also contains no adhesive. Substitute 85005061 includes Pressure Sensitive Adhesive (PSA), providing integrated mounting capability.

Regulatory and Compliance Status: Both substitutes are ROHS3 compliant and REACH unaffected, with active product status ensuring continued availability and support.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement with Identical Thickness: Select 85005061 when the original 0.060" (1.52mm) thickness specification must be maintained. This substitute provides exact dimensional equivalence and includes integrated PSA for simplified installation. Active product status ensures long-term availability and supply chain continuity.

For Space-Constrained Applications: Select 85005021 when reduced thickness is acceptable or required. The 0.020" (0.51mm) profile maintains the 12" × 12" footprint while reducing overall assembly height. This option is suitable for applications where material volume or weight reduction is a design objective.

Compliance Considerations: Both substitutes satisfy ROHS3 and REACH regulatory requirements, appropriate for applications subject to these compliance frameworks. The EAR99 export classification remains consistent across all three parts.

Thermal Performance: Both substitutes operate across -70°C to 177°C, providing extended temperature range capability compared to the original specification where operating temperature was not defined.

Frequently Asked Questions (FAQ)

Q: Can 85005021 replace 85000077 in applications requiring 0.060" thickness?

A: No. The 85005021 thickness of 0.020" (0.51mm) differs from the original 0.060" (1.52mm). Use 85005061 for thickness-critical applications.

Q: What is the primary difference between 85005021 and 85005061?

A: Both are Eccosorb™ JCS-Next silicone elastomer sheets with identical 12" × 12" dimensions. The key differences are thickness (0.020" versus 0.060") and adhesive (85005021 has no adhesive; 85005061 includes PSA).

Q: Does the PSA adhesive on 85005061 affect RF absorption performance?

A: The provided specifications do not include RF absorption performance data. Selection between adhesive and non-adhesive variants should be based on installation method requirements.

Q: Are both substitutes compatible with the original application without modification?

A: Dimensional compatibility (12" × 12" square format) is maintained. Thickness compatibility depends on application design. Verify thickness requirements before selection.

Q: What is the shelf life for substitute parts?

A: Both 85005021 and 85005061 have 12-month shelf life from date of shipment.

Q: Can I use 85005021 (thinner) as a cost-effective alternative if space permits?

A: Yes, if application design allows reduced thickness. Confirm that RF EMI absorption performance remains acceptable at 0.020" thickness for your specific use case.

Q: Are there packaging differences between the substitutes?

A: Both substitutes are supplied in bulk packaging. Verify packaging requirements for your procurement and assembly processes.