FCLF-8520-3 Equivalent & Substitute Parts

Part Overview

The FCLF-8520-3 is a copper SFP transceiver module manufactured by Finisar Corporation, designed for Ethernet applications operating at 1.25Gbs data rate. This module features RJ45 connector compatibility and operates at 3.3V supply voltage in a GBIC copper mounting configuration. The product is currently classified as obsolete, making identification of functionally equivalent active alternatives essential for system maintenance and component procurement.

Substiute Parts

FCLF-8520-3

Finisar CorporationIn Stock: 1030FCLF-8520-3 Datasheet

Current PartRFQ

FCLF8520P2BTL

CoherentIn Stock: 1023FCLF8520P2BTL Datasheet

DirectRFQ

FCLF8522P2BTL

CoherentIn Stock: 1176FCLF8522P2BTL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FCLF-8520-3 is determined by the following critical parameters:

• Data Rate: 1.25Gbs (primary functional requirement)
• Voltage - Supply: 3.3V (electrical compatibility)
• Connector Type: RJ45 (physical interface requirement)
• Applications: Ethernet (functional category)
• Mounting Type: Physical form factor compatibility

Two substitute parts meet these criteria with varying degrees of parameter alignment:

FCLF8522P2BTL provides direct functional equivalence with matching 1.25Gbs data rate, 3.3V supply, RJ45 connector, and Ethernet application scope. This part transitions from GBIC copper to pluggable SFP copper mounting, representing a form factor evolution while maintaining electrical and functional compatibility.

FCLF8520P2BTL shares the same base product number (FCLF8520) and electrical parameters but operates at 1000Mbps data rate instead of 1.25Gbs. This part is suitable only when lower bandwidth requirements are acceptable.

Parameter Comparison

Engineering Selection Recommendations

FCLF8522P2BTL is the primary substitute for direct replacement of the FCLF-8520-3. This part maintains identical data rate (1.25Gbs) and electrical specifications (3.3V supply, RJ45 connector) while offering active product status and ROHS3 compliance. The transition from GBIC copper to pluggable SFP copper mounting represents a standard industry evolution in transceiver form factors. Both parts carry identical MSL ratings and ECCN classifications, confirming regulatory compatibility.

FCLF8520P2BTL serves as a secondary substitute only in applications where 1000Mbps bandwidth is sufficient. This part shares the base product number and electrical parameters but operates at reduced data rate. Selection of this part requires confirmation that system bandwidth requirements do not exceed 1000Mbps.

Both substitute parts are currently in active production status with confirmed inventory availability, eliminating obsolescence risk associated with the original FCLF-8520-3.

Frequently Asked Questions (FAQ)

Q: Can FCLF8522P2BTL directly replace FCLF-8520-3 in existing systems?

A: Yes. Both parts operate at 1.25Gbs data rate with 3.3V supply and RJ45 connectors. The mounting type transition from GBIC copper to pluggable SFP copper is a standard form factor upgrade. Verify that your system supports SFP pluggable modules before implementation.

Q: What is the difference between FCLF8522P2BTL and FCLF8520P2BTL?

A: FCLF8522P2BTL operates at 1.25Gbs, matching the original FCLF-8520-3 data rate. FCLF8520P2BTL operates at 1000Mbps. Select FCLF8522P2BTL for bandwidth-critical applications requiring 1.25Gbs performance.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both FCLF8522P2BTL and FCLF8520P2BTL are ROHS3 compliant, meeting current environmental and regulatory standards.

Q: What is the packaging difference between the substitute parts?

A: FCLF8522P2BTL is supplied in tray packaging. FCLF8520P2BTL is supplied in bulk packaging. Both are suitable for production and field deployment.

Q: Do the substitute parts have the same moisture sensitivity rating?

A: Yes. All three parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage or handling.