
Safe checkout
Secure payments
Fast dispatch
1–2 day handling
Free shipping
U.S. ground
Warranty & RMA
Support after delivery
Finisar FWLF-1519-7D-35 1.25Gb/s SFP 80km Duplex LC SMF Transceiver
- 1.25Gb/s data rate
- SFP (Small Form-Factor Pluggable) form factor
- 80km maximum transmission distance
- Single-mode fiber (SMF) compatible
- Duplex LC connector
- Wavelength: 1519nm (typically C-band for DWDM systems)
FWLF-1519-7D-35 isn't on our shelf today — we source it to order. Request a quote and we'll confirm price and lead time within one business day.
Key specifications
See full specs ↓- Product Type
- Transceiver Module
- Form Factor
- SFP
- Data Rate
- 1.25 Gb/s
- Fiber Type
- Single-Mode Fiber (SMF)
- Reach
- 80 km
- Connector
- Duplex LC
Product details
The Finisar FWLF-1519-7D-35 is a 1.25Gb/s SFP transceiver designed for single-mode fiber (SMF) applications. It offers an 80km reach with a duplex LC connector.
Technical Information
| Product Type | Transceiver Module |
| Form Factor | SFP |
| Data Rate | 1.25 Gb/s |
| Fiber Type | Single-Mode Fiber (SMF) |
Additional Specifications
| Reach | 80 km |
| Connector | Duplex LC |
| Wavelength | 1519 nm |
Description
The Finisar FWLF-1519-7D-35 is a high-performance Small Form-Factor Pluggable (SFP) transceiver module engineered for long-haul optical networking applications. Operating at a data rate of 1.25 Gb/s, this module is specifically designed to transmit data over extended distances on single-mode fiber (SMF) infrastructure. Its impressive 80km reach makes it an ideal choice for connecting geographically dispersed locations or for backbone network links where signal degradation over distance is a primary concern. The transceiver utilizes a duplex LC connector, the industry standard for fiber optic connections, ensuring secure and reliable mating with fiber optic cables. The module's wavelength is specified at 1519nm, which typically falls within the C-band spectrum. This specific wavelength often indicates its suitability for use in Dense Wavelength Division Multiplexing (DWDM) systems, allowing multiple data streams to be transmitted over a single fiber by using different wavelengths. Finisar is a recognized leader in optical communication components, and the FWLF-1519-7D-35 embodies their commitment to quality and performance. This SFP module is designed for compatibility with a wide range of networking equipment, including switches, routers, and network interface cards, providing a versatile solution for extending network reach and capacity. Its robust design ensures reliable operation in demanding enterprise and service provider environments.
Condition: Refurbished
Free U.S. ground shipping
Typically 1–2 days handling, 3–7 days in transit.
Purchase orders accepted
Government, enterprise, data center and small business.
Buying 10+ units?
Get volume pricing and availability for FWLF-1519-7D-35.




