A finned-top OSFP module has an integrated heat sink (metal fins) built into the top of the transceiver caging. These fins increase surface area and improve heat dissipation. When browsing and searching for OSFP optical transceivers you might have come across two types: finned and flat-top. Two different housing versions for two different use cases, so which to choose? In this article we will explain what each of the versions are, how do they differ and which to choose. This article provides a comprehensive guide to understanding the differences between these two designs, their technical specifications, application scenarios, and future trends in optical networking. Understanding Finned-Top and Flat-Top OSFP Transceivers Finned-Top OSFP: Features a heat sink. These modules support high-bandwidth demands while ensuring reliable performance in dense environments. Increase your network capacity without overbuilding with Harmonic's Fin 10G SFP+ Based OLT module. You can deploy Fin with Harmonic's Jetty 60G-Capable Remote Switch or Pebble R-PHY device for simple plug-and-play 10G. OSFP (Octal Small Form-factor Pluggable), as a mainstream high-speed packaging format, offers two main thermal solutions: OSFP IHS (Integrated Heat Sink) and OSFP RHS (Riding Heat Sink). The form factor allows for both room inside the module for components, but also cooling optics that can commonly span from 10-15W for lower-power OSFP optics to over 30W for higher power devices.
