FTL4P1QL1C QSFP+ Transceiver Equivalent & Substitute Parts

Part Overview

The FTL4P1QL1C is a QSFP+ transceiver module manufactured by Finisar Corporation, designed for 10Gbps Ethernet applications over 2km distances. This module operates at 1308nm wavelength with a supply voltage range of 3.1V to 3.47V and features an MTP® (MPO) connector in a pluggable QSFP+ form factor.

The product status is listed as Obsolete, making identification of compatible substitute parts essential for system maintenance, upgrades, and continued operational support. Substitute parts must maintain electrical and mechanical compatibility while meeting the same connector and form factor requirements.

Substiute Parts

FTL4P1QL1C

Finisar CorporationIn Stock: 1174FTL4P1QL1C Datasheet

Current PartRFQ

TQS-Q1LB9-F11

Formerica Optoelectronics Inc.In Stock: 1044TQS-Q1LB9-F11 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the FTL4P1QL1C is determined by the following critical parameters:

• Connector Type: MTP® (MPO) connector requirement
• Mounting Type: Pluggable QSFP+ form factor
• Voltage Supply Range: Operating voltage compatibility
• Wavelength: Optical transmission wavelength
• Data Rate: Transmission speed capability

The identified substitute part TQS-Q1LB9-F11 shares the same connector type (MTP® (MPO)) and mounting type (Pluggable, QSFP+), enabling mechanical and electrical interface compatibility. Both parts operate within compatible voltage specifications and maintain the same moisture sensitivity classification.

Parameter Comparison

Engineering Selection Recommendations

The TQS-Q1LB9-F11 is available as an Active product status component, providing ongoing supply and support compared to the Obsolete FTL4P1QL1C. Both parts maintain identical moisture sensitivity classification (MSL 1) and share the same connector and form factor specifications.

The TQS-Q1LB9-F11 operates at 3.3V, which falls within the supply voltage range of the FTL4P1QL1C (3.1V ~ 3.47V), ensuring electrical compatibility. Both components carry the same ECCN and HTSUS classifications, indicating equivalent regulatory treatment.

The substitute part is RoHS Compliant and REACH Unaffected, meeting current environmental and regulatory requirements for component selection.

Frequently Asked Questions (FAQ)

Q: Can the TQS-Q1LB9-F11 directly replace the FTL4P1QL1C in existing systems?

A: Both parts share identical connector types (MTP® (MPO)) and mounting types (Pluggable, QSFP+), enabling mechanical compatibility. The supply voltage of the TQS-Q1LB9-F11 (3.3V) operates within the FTL4P1QL1C voltage range (3.1V ~ 3.47V), supporting electrical interface compatibility.

Q: What are the key differences between these parts?

A: The primary differences are data rate (10Gbps vs. 40Gbps), wavelength (1308nm vs. 1310nm), and product status (Obsolete vs. Active). The TQS-Q1LB9-F11 is designed for SFP+ Active Optical Cable (AOC) applications, while the FTL4P1QL1C is specified for Ethernet applications.

Q: Are there packaging differences between these parts?

A: The FTL4P1QL1C is supplied in standard packaging, while the TQS-Q1LB9-F11 is supplied in Tray packaging. Both maintain MSL 1 (Unlimited) moisture sensitivity classification.

Q: Why is the FTL4P1QL1C listed as Obsolete?

A: Obsolete status indicates the part is no longer manufactured or supported by Finisar Corporation. The TQS-Q1LB9-F11, with Active product status, represents a currently available alternative for continued system support.