Equivalent & Substitute Parts for Laird Technologies EMI 85000039

Part Overview

The Laird Technologies EMI 85000039 is an RF EMI absorbing sheet from the ECCOSORB® JCS series, featuring silicone rubber construction with pressure sensitive adhesive (PSA). This product is classified as obsolete, necessitating identification of active equivalent alternatives to maintain supply chain continuity for RF EMI shielding applications. The part measures 12.000" × 12.000" × 0.100" and operates across a temperature range of -70°C to 177°C.

Substiute Parts

85000039

Laird Technologies EMIIn Stock: 113185000039 Datasheet

Current PartRFQ

85005031

Laird Technologies EMIIn Stock: 81985005031 Datasheet

MFR RecommendedRFQ

85005101

Laird Technologies EMIIn Stock: 76685005101 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for RF EMI absorbing sheets is determined by the following parameters: planar dimensions (length and width), thickness, adhesive type, operating temperature range, and material composition. The ECCOSORB® JCS series 85000039 has two manufacturer-recommended substitutes within the active Eccosorb™ JCS-Next product line.

Primary substitution criteria:

• Identical planar dimensions: 12.000" × 12.000"
• Pressure Sensitive Adhesive (PSA) configuration
• Silicone-based elastomer material
• ROHS3 compliance maintained
• Active product status

The two substitute parts differ in thickness specification, allowing selection based on application-specific absorption requirements while maintaining geometric and adhesive compatibility.

Parameter Comparison

Engineering Selection Recommendations

For direct replacement with identical thickness (0.100"):

Select Laird Technologies EMI 85005101 (Eccosorb™ JCS-Next .100X12X12). This part maintains the original thickness specification of 0.100" (2.54mm) and planar dimensions. Both parts feature PSA adhesive and silicone-based material construction. The 85005101 is active product status with ROHS3 compliance. Operating temperature specification is not provided for 85005101; applications requiring confirmed temperature performance should reference the original 85000039 specification of -70°C to 177°C.

For reduced thickness applications (0.030"):

Select Laird Technologies EMI 85005031 (Eccosorb™ JCS-Next .030X12X12IN). This part provides the same planar dimensions with reduced thickness of 0.030" (0.76mm). Operating temperature range is specified as -70°C to 177°C, matching the original part. This configuration is suitable for space-constrained applications where full absorption performance can be achieved with thinner material. The 85005031 is active product status with ROHS3 compliance.

Both substitutes are manufacturer-recommended alternatives within the Eccosorb™ JCS-Next product line, representing the active generation replacement for the obsolete ECCOSORB® JCS series.

Frequently Asked Questions (FAQ)

Q: Can 85005101 directly replace 85000039 in all applications?

A: The 85005101 maintains identical planar dimensions (12.000" × 12.000") and thickness (0.100"), PSA adhesive type, and silicone-based material composition. Both are ROHS3 compliant. The primary difference is material designation (Silicone Elastomer vs. Silicone Rubber) and product series generation. Operating temperature specification is not provided for 85005101; applications with specific temperature requirements should confirm compatibility.

Q: What is the difference between 85005101 and 85005031?

A: The primary difference is thickness. The 85005101 is 0.100" (2.54mm) thick, matching the original 85000039. The 85005031 is 0.030" (0.76mm) thick, providing a thinner alternative. Both maintain the 12.000" × 12.000" planar dimensions and PSA adhesive configuration. The 85005031 specifies operating temperature of -70°C to 177°C.

Q: Are both substitutes compatible with the original packaging and assembly processes?

A: Both substitutes are supplied in Bulk packaging. The identical planar dimensions (12.000" × 12.000") ensure mechanical compatibility with existing assembly fixtures and mounting surfaces. PSA adhesive type is consistent across all three parts, maintaining application compatibility.

Q: What is the material difference between Silicone Rubber and Silicone Elastomer?

A: Both are silicone-based materials used in RF EMI absorbing sheet construction. The original 85000039 specifies Silicone Rubber, while the substitutes (85005101 and 85005031) specify Silicone Elastomer. Both material types are compatible with the specified planar dimensions, thickness options, and PSA adhesive configuration for this product category.

Q: Which substitute should be selected for new designs?

A: For new designs requiring 0.100" thickness, select 85005101. For applications where 0.030" thickness is sufficient, select 85005031. Both are active products with ROHS3 compliance. The 85005031 provides explicit operating temperature specification (-70°C to 177°C) matching the original part.