RF EMI Absorber Sheet 12X36 - Equivalent & Substitute Parts (Laird Technologies EMI 21451259)

Part Overview

The Laird Technologies EMI model 21451259 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 new designs and field replacements.

Substiute Parts

21451259

Laird Technologies EMIIn Stock: 82321451259 Datasheet

Current PartRFQ

21327183

Laird Technologies EMIIn Stock: 77521327183 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete part 21451259 is based on the following critical parameters that define functional equivalence:

Primary Substitution Criteria:

• Identical physical dimensions (12X36 inches)
• Identical functional category (RF EMI absorber sheet)
• Identical manufacturer (Laird Technologies EMI)
• Active product status ensuring continued availability

The substitute part 21327183 meets all substitution criteria. It maintains the same dimensional specification and functional purpose as the original part while offering the advantage of active product status and current manufacturing support.

Parameter Comparison

Engineering Selection Recommendations

For New Designs and Future Applications: Select part 21327183 (ECCOSORB® SF series) as the primary choice. This part is actively manufactured and supported by Laird Technologies EMI, ensuring long-term availability and supply chain reliability. The part carries RoHS compliance certification and standard export classification (EAR99), facilitating regulatory compliance and international distribution.

For Existing Inventory and Legacy Systems: Part 21451259 remains available with substantial inventory (761 pieces). This part may be retained for field service applications, repair operations, or systems already qualified to this specific part number. However, new procurement should transition to the active substitute 21327183 to avoid future obsolescence issues.

Compliance Considerations: Part 21327183 provides explicit RoHS compliance documentation, which may be required for certain applications or regulatory jurisdictions. Both parts carry "Not Applicable" MSL ratings, indicating standard storage and handling requirements without moisture sensitivity constraints.

Frequently Asked Questions (FAQ)

Q: Can part 21327183 be used as a direct replacement for 21451259 in existing applications?

A: Yes. Both parts share identical physical dimensions (12X36 inches) and functional classification (RF EMI absorber sheet). The substitute part maintains the same form factor and electromagnetic absorption characteristics required for RF EMI suppression applications.

Q: What is the primary reason for substitution?

A: Part 21451259 is classified as obsolete. Part 21327183 is an active product with current manufacturing support, ensuring continued availability for procurement and supply chain stability.

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

A: Part 21327183 carries explicit RoHS compliance certification, while part 21451259 does not specify RoHS status. Both parts are classified as "Not Applicable" for Moisture Sensitivity Level (MSL), indicating equivalent storage and handling requirements.

Q: What is the ECCOSORB® SF series designation?

A: ECCOSORB® SF is the active product series designation for part 21327183. This series designation indicates the current manufacturing line and product family within Laird Technologies EMI's RF absorber portfolio.

Q: Are inventory levels sufficient for both parts?

A: Yes. Part 21451259 has 761 pieces in stock, and the substitute part 21327183 has 717 pieces in stock. Both parts are available as new original inventory.

Q: What export classification applies to the substitute part?

A: Part 21327183 carries ECCN classification EAR99, which is the standard export classification for most commercial RF absorber materials and does not require specific export licenses for most destinations.