100G and 200G Optical Transceivers Product Detail
200G QSFP-DD ER4 is a QSFP-DD ER4 option using Duplex LC for 40km single-mode fiber links.
This page includes a reference part number and key optical and electrical parameters. Confirm compatibility coding, temperature grade, and the latest specification before volume purchase.
Specs & Features
For the latest specification and samples, contact sales@staricatech.com.
200G QSFP-DD ER4 is designed for 40km links using Duplex LC. Selection must confirm the host form factor, electrical interface, PMD, FEC, fiber mapping, power and thermal limits, software version and the remote endpoint; the model name alone does not establish interoperability.
Selection FAQ
The complete loss budget and the dispersion penalty over the real route, not just the 40km label on 200G QSFP-DD ER4. Long spans accumulate loss at every splice and patch point, and the achievable distance drops quickly once the fiber grade or route length differs from the plan.
Almost always. 200G QSFP-DD ER4 is engineered to overcome the attenuation of a 40km span, so on a short fiber the received power will sit well above the receiver overload point and the link becomes unstable. Confirm the overload figure in the ordering specification and attenuate before bench testing.
Give the host vendor, model and software version at both ends, the QSFP-DD port or lane mode, the operating temperature range, the quantity per site and the target delivery date. For 200G QSFP-DD ER4 also state the route length, fiber attenuation per kilometre and any existing amplifier or attenuator in the path. Compatibility is confirmed per platform, so the host details matter as much as the optical specification.
Related Products
200G QSFP56 FR4 is a QSFP56 FR4 option using Duplex LC for 2km single-mode fiber links.
200G QSFP56 SR4 is a QSFP56 SR4 option using MPO-12 for 70m OM3 / 100m OM4 multimode fiber links.
200G QSFP-DD LR4 is a QSFP-DD LR4 option using Duplex LC for 10km single-mode fiber links.
