RF EMI Absorbing Sheet 85000073 Equivalent & Substitute Parts

Part Overview

The Laird Technologies EMI 85000073 is an RF EMI absorbing sheet manufactured from ECCOSORB® JCS silicone rubber with pressure sensitive adhesive (PSA). This square-format absorbing sheet measures 12.000" × 12.000" × 0.039" and is designed for electromagnetic interference suppression applications across a wide operating temperature range of -70°C to 177°C.

The 85000073 carries an obsolete product status. Identifying equivalent substitute parts ensures continued availability for applications requiring RF EMI absorption with comparable electrical and mechanical characteristics. Active alternative products from the Eccosorb™ JCS-Next series provide functional equivalence with updated material formulations and extended component lifecycle support.

Substiute Parts

85000073

Laird Technologies EMIIn Stock: 106785000073 Datasheet

Current PartRFQ

85005021

Laird Technologies EMIIn Stock: 70285005021 Datasheet

MFR RecommendedRFQ

85005041

Laird Technologies EMIIn Stock: 67385005041 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 thickness must accommodate the application envelope. The main part 85000073 specifies 12.000" × 12.000" square format with 0.039" thickness.

Operating Temperature Range: The substitute must maintain performance across -70°C to 177°C to ensure thermal compatibility with the original specification.

Material Composition: Silicone-based elastomer materials provide equivalent RF absorption characteristics and environmental resistance.

Adhesive Configuration: The original part includes PSA; substitutes may employ alternative adhesive systems or non-adhesive formats depending on application requirements.

Regulatory Compliance: ROHS3 compliance and EAR99 export classification must be maintained.

The two identified substitutes—85005021 and 85005041—are both active products from the Eccosorb™ JCS-Next series. These parts maintain the 12.000" × 12.000" square dimensions and -70°C to 177°C operating temperature range. Thickness variations (0.020" and 0.040" respectively) provide options for different absorption depth requirements while remaining within the mechanical envelope of the original 0.039" specification.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Thickness-Matched): Part 85005041 provides the closest thickness match at 0.040" (1.02mm) compared to the original 0.039" (1.00mm). This substitute maintains active product status, ROHS3 compliance, and identical operating temperature range. The absence of PSA adhesive requires evaluation of mounting method compatibility in the target application.

For Reduced-Thickness Applications: Part 85005021 at 0.020" (0.51mm) thickness offers a thinner profile while retaining the 12.000" × 12.000" square format and full operating temperature specification. This option is suitable for space-constrained installations where absorption depth can be reduced.

Product Lifecycle Consideration: Both substitute parts carry active product status, ensuring long-term availability and supply chain continuity compared to the obsolete 85000073. The Eccosorb™ JCS-Next series represents the current generation of this product family.

Compliance Status: All three parts maintain ROHS3 compliance and EAR99 export classification, supporting regulatory requirements across manufacturing and deployment environments.

Frequently Asked Questions (FAQ)

Q: Can 85005021 or 85005041 directly replace 85000073 in existing designs?

A: Both parts maintain the 12.000" × 12.000" square dimensions and -70°C to 177°C operating temperature range required for functional equivalence. The primary design consideration is adhesive configuration: the original 85000073 includes PSA, while both substitutes do not. Applications requiring adhesive mounting must implement alternative fastening methods or apply separate adhesive.

Q: What is the significance of thickness differences between the three parts?

A: The original 85000073 specifies 0.039" thickness. Substitute 85005041 at 0.040" provides near-identical thickness for applications with strict absorption depth requirements. Substitute 85005021 at 0.020" offers half the thickness, suitable for space-limited installations where reduced absorption depth is acceptable. Thickness selection depends on RF absorption performance requirements specific to the application.

Q: Are the material differences between ECCOSORB® JCS and Eccosorb™ JCS-Next significant?

A: Both employ silicone-based elastomer compositions. The original uses silicone rubber; the substitutes use silicone elastomer. Both material families provide equivalent RF absorption characteristics and maintain the specified operating temperature range. Material selection reflects product line evolution within the Laird Technologies EMI portfolio.

Q: Do the substitutes require different handling or storage procedures?

A: The original 85000073 specifies 24-month shelf life from date of shipment. Both substitutes specify 12-month shelf life from date of shipment. Storage temperature requirements are not specified for any of the three parts. Standard component storage practices apply to all variants.

Q: What compliance certifications apply to the substitute parts?

A: Both 85005021 and 85005041 maintain ROHS3 compliance and EAR99 export classification identical to the original 85000073. The 85005021 and 85005041 additionally carry REACH Unaffected status. All three parts are classified as not applicable for Moisture Sensitivity Level (MSL).