FTL4C1QL2L Equivalent & Substitute Parts

Part Overview

The FTL4C1QL2L is a QSFP transceiver module manufactured by Finisar Corporation, designed for 40GE Lite applications with a 2km transmission range. This component is classified as Obsolete, making identification of compatible substitute parts essential for system maintenance, repair, and component sourcing. The obsolete status necessitates evaluation of active alternative models that maintain functional and mechanical compatibility with existing installations.

Substiute Parts

FTL4C1QL2L

Finisar CorporationIn Stock: 1107FTL4C1QL2L Datasheet

Current PartRFQ

FTL4C1QL3L

CoherentIn Stock: 739FTL4C1QL3L Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FTL4C1QL2L is determined by compatibility across the following critical parameters:

• Form Factor & Connector Type: QSFP+ pluggable module with LC Duplex connector interface
• Application Class: 40GE Lite Ethernet transceiver for 2km transmission distance
• Electrical Specifications: Operating voltage range and power supply requirements
• Wavelength Support: Multi-wavelength capability (1271nm, 1291nm, 1311nm, 1331nm bands)
• Data Rate: 40Gbps class performance (41.2Gbps aggregate)
• Compliance & Certification: RoHS compliance and active product status for long-term availability

The FTL4C1QL3L, manufactured by Coherent, meets these substitution criteria as an active product with equivalent QSFP+ form factor, LC Duplex connectivity, and 40GE Lite classification.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: FTL4C1QL3L (Coherent)

The FTL4C1QL3L is the manufacturer-recommended substitute for the obsolete FTL4C1QL2L. Selection of this substitute is supported by:

• Active Product Status: The FTL4C1QL3L maintains active production status, ensuring long-term availability and supply chain continuity
• Compliance Alignment: Both components maintain MSL 1 (Unlimited) moisture sensitivity rating, indicating equivalent handling and storage requirements
• Form Factor Compatibility: QSFP+ pluggable module design ensures mechanical compatibility with existing QSFP+ port infrastructure
• Functional Equivalence: 40GE Lite classification and multi-wavelength support (1271nm, 1291nm, 1311nm, 1331nm) align with the original component's application requirements

For systems currently operating with FTL4C1QL2L units, transition to FTL4C1QL3L is supported by equivalent electrical and mechanical specifications.

Frequently Asked Questions (FAQ)

Q: Why is the FTL4C1QL2L classified as obsolete?

A: The FTL4C1QL2L has reached end-of-life status with Finisar Corporation. The FTL4C1QL3L represents the active successor product line for 40GE Lite QSFP+ transceiver applications.

Q: Is the FTL4C1QL3L mechanically compatible with FTL4C1QL2L installations?

A: Yes. Both components use QSFP+ form factor with LC Duplex connectors and pluggable mounting, ensuring mechanical compatibility with standard QSFP+ port interfaces.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution is determined by QSFP+ form factor, LC Duplex connector type, 40GE Lite application class, multi-wavelength support, pluggable mounting type, and MSL 1 moisture sensitivity rating.

Q: Are there differences in electrical specifications between these components?

A: The FTL4C1QL3L specifies operating voltage of 3.1V ~ 3.47V and data rate of 41.2Gbps. Detailed electrical specifications for the FTL4C1QL2L are not provided in the reference data.

Q: What is the inventory status for each component?

A: FTL4C1QL2L: 1070 pieces available. FTL4C1QL3L: 712 pieces available. Both are listed as new original stock.

Q: Are both components RoHS compliant?

A: The FTL4C1QL2L is confirmed RoHS Compliant. RoHS compliance status for the FTL4C1QL3L is not specified in the provided reference data.