RF EMI Absorber Sheet 21451227 Equivalent & Substitute Parts

Part Overview

The Laird Technologies EMI model 21451227 is an RF EMI absorber sheet designed for electromagnetic interference suppression applications. This product is classified as Obsolete and is no longer in active production. The part measures 0.125" × 12" × 36" and was manufactured by Laird Technologies EMI.

Due to its obsolete status, sourcing original inventory becomes increasingly difficult. Identifying active equivalent products ensures continued access to functionally compatible RF EMI absorption solutions for maintenance, repair, and new design applications.

Substiute Parts

21451227

Laird Technologies EMIIn Stock: 75721451227 Datasheet

Current PartRFQ

21109160

Laird Technologies EMIIn Stock: 84721109160 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

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

Dimensional Compatibility: Length, width, and thickness must match or exceed the original specification to ensure proper fit and electromagnetic absorption performance in the intended application space.

Material Composition: The absorbing material type (silicone rubber, foam, or other polymeric compounds) determines frequency response and absorption characteristics.

Adhesive System: Pressure Sensitive Adhesive (PSA) or non-adhesive backing affects installation method and surface compatibility.

Operating Temperature Range: Thermal stability requirements must be met to prevent material degradation during operation.

Product Status: Active products provide assured long-term availability and supply chain reliability compared to obsolete components.

The substitute part 21109160 shares the same manufacturer (Laird Technologies EMI) and belongs to the same product family (ECCOSORB® MCS series), ensuring functional equivalence for RF EMI absorption applications.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: Part 21451227 is obsolete and no longer manufactured. Part 21109160 is active and maintains current production status, ensuring availability for procurement and supply chain continuity.

Compliance & Certification: Part 21109160 carries ROHS3 compliance certification, meeting current environmental and regulatory requirements for electronic component manufacturing and assembly.

Dimensional Alignment: Both parts share identical length (36") and width (12") dimensions. The thickness difference (0.125" vs. 0.039") must be evaluated against specific application space constraints and absorption performance requirements.

Material & Adhesive Properties: Part 21109160 specifies silicone rubber construction with PSA backing, providing documented material properties and installation characteristics suitable for RF EMI suppression in standard applications.

Thermal Performance: Part 21109160 is rated to 170°C operating temperature, establishing a defined thermal envelope for component selection in temperature-sensitive environments.

Frequently Asked Questions (FAQ)

Q: Can part 21109160 directly replace part 21451227?

A: Both parts are RF EMI absorber sheets from Laird Technologies EMI with matching length and width dimensions (36" × 12"). The primary difference is thickness: 21451227 is 0.125" while 21109160 is 0.039". Direct replacement is possible if application space accommodates the thinner profile and absorption performance requirements are met with the reduced thickness.

Q: What is the significance of the thickness difference?

A: Thickness directly affects electromagnetic absorption characteristics and mechanical fit within confined spaces. The 0.125" thickness of 21451227 provides greater material volume for absorption compared to the 0.039" thickness of 21109160. Application-specific testing may be required to confirm performance equivalence.

Q: Why is part 21451227 listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. Part 21109160, as an active product from the same manufacturer and product family, represents the current equivalent offering for RF EMI absorption applications.

Q: Does part 21109160 include adhesive backing?

A: Yes. Part 21109160 features Pressure Sensitive Adhesive (PSA) backing, enabling direct surface mounting without additional fasteners or adhesive application. Original part 21451227 adhesive specification is not documented.

Q: Are both parts RoHS compliant?

A: Part 21109160 is ROHS3 compliant. Compliance status for part 21451227 is not specified in available documentation.

Q: What is the operating temperature range for these parts?

A: Part 21109160 is rated to 170°C maximum operating temperature. Operating temperature specification for part 21451227 is not provided.

Q: How should I verify compatibility before ordering part 21109160 as a replacement?

A: Confirm that application space accommodates 0.039" thickness, verify that PSA adhesive is compatible with target mounting surface, and validate that 170°C thermal rating meets application requirements. Consult application-specific design documentation for absorption frequency response requirements.