RF EMI Absorber Sheet 12X36 - Equivalent & Substitute Parts (Laird Technologies EMI 21451257)

Part Overview

The Laird Technologies EMI model 21451257 is an RF EMI absorber sheet with dimensions of 12X36 inches, designed for electromagnetic interference suppression applications. This part is currently classified as obsolete, necessitating identification of active equivalent alternatives to maintain supply chain continuity and ensure ongoing availability for replacement and new design applications.

Substiute Parts

21451257

Laird Technologies EMIIn Stock: 104721451257 Datasheet

Current PartRFQ

21492171

Laird Technologies EMIIn Stock: 95221492171 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete model 21451257 is based on the following critical parameters:

Functional Equivalence Criteria:

• Identical physical dimensions (12X36 inches)
• RF EMI absorber sheet classification
• Manufacturer continuity (Laird Technologies EMI)
• Moisture Sensitivity Level classification (Not Applicable)

The substitute part 21492171 meets all functional and dimensional requirements for direct replacement. The primary distinction is product status: 21492171 is active and currently manufactured, whereas 21451257 is obsolete. Both parts share the same core application purpose and physical specifications, establishing direct substitutability for RF EMI absorption applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: Laird Technologies EMI 21492171

The model 21492171 is the direct active equivalent for the obsolete 21451257. Selection of this substitute is based on:

• Product Status: 21492171 maintains active manufacturing status, ensuring long-term availability and supply chain reliability
• Regulatory Compliance: 21492171 carries RoHS Compliant certification, meeting current environmental and regulatory standards
• Dimensional Compatibility: Both parts maintain identical 12X36 inch specifications
• Functional Equivalence: Both are RF EMI absorber sheets from the same manufacturer
• Export Classification: 21492171 is classified as EAR99, providing standard export flexibility compared to the obsolete designation of 21451257

For applications currently using 21451257, direct substitution with 21492171 is supported by functional and dimensional equivalence. The ECCOSORB® SF series designation of 21492171 indicates product line continuity within Laird Technologies EMI's RF absorber portfolio.

Frequently Asked Questions (FAQ)

Q: Can model 21492171 directly replace the obsolete 21451257?

A: Yes. Both parts are RF EMI absorber sheets with identical 12X36 inch dimensions from Laird Technologies EMI. Functional and dimensional specifications support direct substitution.

Q: What is the primary reason for substitution?

A: Model 21451257 is classified as obsolete. Model 21492171 is the active equivalent, ensuring continued availability and compliance with current manufacturing standards.

Q: Are there compliance differences between the two parts?

A: Model 21492171 carries RoHS Compliant certification. Both parts have Not Applicable moisture sensitivity levels. The export classification differs: 21451257 is marked OBSOLETE, while 21492171 is classified as EAR99.

Q: Do the parts have identical physical dimensions?

A: Yes. Both parts are specified as 12X36 inch RF EMI absorber sheets.

Q: What is the ECCOSORB® SF series designation?

A: ECCOSORB® SF is the product series identifier for model 21492171, indicating its classification within Laird Technologies EMI's RF absorber product line.

Q: Are inventory levels sufficient for both parts?

A: Current inventory shows 1010 pieces of 21451257 and 880 pieces of 21492171 in stock. Inventory availability should be verified at time of procurement.