RF EMI Absorbing Sheet 21199164 Equivalent & Substitute Parts

Part Overview

The Laird Technologies EMI model 21199164 is an RF EMI absorbing sheet with dimensions of 0.125" thickness × 12" width × 36" length. This component is classified as Obsolete and is no longer in active production. Due to its obsolete status, identifying functionally equivalent substitute parts is necessary for ongoing system maintenance, repair, and new design implementations where this absorber specification is required.

Substiute Parts

21199164

Laird Technologies EMIIn Stock: 90521199164 Datasheet

Current PartRFQ

21109146

Laird Technologies EMIIn Stock: 100221109146 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of RF EMI absorbing sheets is determined by the following critical parameters:

Dimensional Compatibility: Length, width, and thickness must accommodate the mechanical envelope of the application. The main part specifies 0.125" thickness with 12" × 36" surface dimensions.

Material Composition: RF absorbing sheets must utilize compatible material systems (silicone rubber, foam, or equivalent) to maintain electromagnetic absorption characteristics across the intended frequency range.

Adhesive System: If the original part includes pressure-sensitive adhesive (PSA) or requires adhesive backing, the substitute must provide equivalent adhesive properties and surface compatibility.

Regulatory Compliance: Both parts must satisfy identical ECCN and HTSUS classifications to ensure export and procurement compliance.

Product Status: Active production parts are preferred for long-term availability and supply chain stability.

The identified substitute part 21109146 shares the same manufacturer (Laird Technologies EMI), identical ECCN/HTSUS codes, and equivalent functional classification as an RF EMI absorbing sheet, making it a direct substitute candidate.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 21109146

The part 21109146 is the direct substitute for the obsolete 21199164. Both parts are manufactured by Laird Technologies EMI and share identical regulatory classifications (ECCN EAR99, HTSUS 3919.90.5060). The substitute part is currently in active production status, ensuring supply chain continuity and availability.

Key Considerations:

1. Thickness Differential: The substitute part 21109146 has a thickness of 0.039" (1.00mm), while the original part specifies 0.125" thickness. This represents a significant reduction in material thickness. Applications requiring the original 0.125" thickness specification must evaluate whether the thinner 0.039" profile is mechanically and electromagnetically acceptable for the intended use case.

2. Active Production Status: Part 21109146 is classified as Active, providing long-term procurement reliability compared to the Obsolete status of 21199164.

3. Material and Adhesive Specification: The substitute provides explicit material composition (Silicone Rubber) and adhesive system (PSA), enabling precise compatibility assessment with mounting surfaces and environmental conditions.

4. Regulatory Compliance: Both parts maintain identical export control and tariff classifications, eliminating compliance barriers for substitution.

5. Inventory Availability: Both parts maintain adequate stock levels (868 pcs for 21199164; 918 pcs for 21109146), supporting immediate procurement.

Frequently Asked Questions (FAQ)

Q1: Can part 21109146 directly replace 21199164 in all applications?

A: Both parts are RF EMI absorbing sheets from the same manufacturer with identical regulatory classifications. However, the thickness difference (0.125" vs. 0.039") must be evaluated against specific application requirements. If the original design depends on the 0.125" thickness for mechanical support, thermal management, or electromagnetic absorption characteristics, the thinner substitute may not be suitable without design modification.

Q2: What is the significance of the ECCOSORB® MCS series designation for part 21109146?

A: ECCOSORB® MCS is the product series name for the substitute part, indicating it belongs to Laird Technologies' MCS (Microwave Composite Series) line of silicone rubber-based absorbing materials. This designation provides traceability to the material specification and performance characteristics within Laird's product portfolio.

Q3: Does the Pressure Sensitive Adhesive (PSA) on part 21109146 affect compatibility?

A: The PSA backing on 21109146 provides self-adhesive mounting capability. If the original 21199164 was used without adhesive or with a different adhesive system, the PSA characteristic of the substitute must be verified for compatibility with the mounting surface and environmental conditions (temperature, humidity, chemical exposure).

Q4: Are there thermal performance differences between the two parts?

A: Part 21109146 specifies an operating temperature of 170°C. The original part 21199164 does not provide operating temperature data. If thermal performance is critical to the application, the 170°C rating of the substitute should be confirmed as acceptable for the intended operating environment.

Q5: What packaging considerations apply to these parts?

A: Part 21199164 packaging is not specified in available documentation. Part 21109146 is supplied in Bulk packaging. Procurement specifications should confirm that bulk packaging meets receiving, storage, and handling requirements for the application.

Q6: Are both parts RoHS and REACH compliant?

A: Part 21109146 is explicitly marked as ROHS3 Compliant and REACH Unaffected. Compliance documentation for the original part 21199164 is not provided. For applications requiring RoHS or REACH certification, the substitute part 21109146 provides documented compliance status.