2026-05-07
100G Optical Module: BOX Package vs COB Package
The advantages of COB packaging:
The core advantages of the COB (Chip-on-Board) package are high integration and low cost. It directly mounts bare chips onto the PCB, eliminating the traditional package housing and complex wiring. Therefore, it is particularly suitable for cost-sensitive and controlled environments such as data centers and high-performance computing.
The advantages of BOX packaging:
The core advantages of the 100G BOX package are high reliability and environmental adaptability. It features a hermetic housing filled with inert gas, protecting the optical chip. Therefore, it is particularly suitable for demanding scenarios such as telecom backbone networks, 5G fronthaul/backhaul, and outdoor environments with significant temperature fluctuations.
To help you understand the difference intuitively, here is a comparison between the BOX package and the COB (Chip-on-Board) package commonly used in data centers:
How to Choose?
Choose BOX Package when your top priorities are reliability and long-term stability, and the equipment will be deployed in uncontrolled environments with wide temperature ranges (e.g., telecom central offices, outdoor cabinets).
Choose COB Package when your top priorities are cost, low power consumption, and high density, and the equipment operates in a temperature/humidity-controlled environment (e.g., data center).
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