RF EMI Absorber Sheet 21199161 Equivalent & Substitute Parts

Part Overview

The Laird Technologies EMI model 21199161 is an RF EMI absorber sheet designed for electromagnetic interference suppression applications. This component is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure procurement availability. The original specification calls for a .125" thick absorber sheet with 12" x 12" dimensions.

Substiute Parts

21199161

Laird Technologies EMIIn Stock: 108321199161 Datasheet

Current PartRFQ

21109161

Laird Technologies EMIIn Stock: 69421109161 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

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

Dimensional Compatibility: The substitute part must maintain equivalent or compatible overall dimensions (length, width, and thickness) to fit within the same mechanical envelope and provide equivalent EMI absorption coverage.

Material Composition: The absorber material type (silicone rubber, foam, or other dielectric materials) determines frequency response and absorption characteristics.

Product Status: Active product status ensures ongoing availability and supply chain reliability, eliminating obsolescence risk.

Regulatory Compliance: ECCN and HTSUS classifications must align to maintain export control and tariff consistency.

The identified substitute part 21109161 shares the same manufacturer (Laird Technologies EMI), ECCN classification (EAR99), and equivalent dimensional footprint, making it a direct functional equivalent despite differences in thickness specification and material composition.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: Part number 21109161 is the designated equivalent for obsolete part 21199161. Both components are manufactured by Laird Technologies EMI and share identical planar dimensions (12" x 12"), ensuring mechanical compatibility within existing designs.

Product Status Advantage: The substitute part 21109161 maintains active product status, providing assured long-term availability and supply chain continuity. The original part 21199161, classified as obsolete, presents procurement risk despite current inventory availability.

Regulatory Compliance: Both parts carry EAR99 ECCN classification, maintaining consistent export control compliance. The substitute part additionally carries ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements.

Thickness Differential: The substitute part 21109161 specifies 0.039" thickness compared to the original 0.125" specification. This represents a significant reduction in material thickness. Design validation is required to confirm that the thinner profile maintains adequate EMI absorption performance for the intended application frequency range and shielding requirements.

Frequently Asked Questions (FAQ)

Q: Can part 21109161 directly replace 21199161 in existing designs?

A: Both parts share identical 12" x 12" planar dimensions and are manufactured by the same supplier. However, the thickness difference (0.125" versus 0.039") requires verification that EMI absorption performance remains adequate for the application's frequency range and shielding specifications.

Q: Why is the substitute part thinner than the original?

A: The substitute part 21109161 is specified as ECCOSORB® MCS silicone rubber material, which may provide different absorption characteristics per unit thickness compared to the original part's unspecified material composition. Material properties determine absorption efficiency independent of thickness alone.

Q: Are there any compliance differences between the two parts?

A: The substitute part 21109161 carries additional certifications: ROHS3 compliance and REACH unaffected status. The original part 21199161 does not specify these certifications. Both parts maintain EAR99 ECCN classification for export control purposes.

Q: What is the packaging difference?

A: The substitute part 21109161 is supplied in bulk packaging, whereas the original part packaging specification is not provided. Confirm bulk packaging compatibility with receiving and handling procedures.

Q: Should I use remaining inventory of part 21199161 or transition to 21109161?

A: Transition planning should prioritize the active substitute part 21109161 for new designs and long-term production. Existing inventory of obsolete part 21199161 may be used for current production runs, but supply exhaustion is inevitable. Validate thickness and material performance differences before full transition.