{"id":5223,"date":"2026-07-15T09:44:00","date_gmt":"2026-07-15T09:44:00","guid":{"rendered":"https:\/\/optics.carritech.com\/optical-transceivers\/uncategorized\/qdd-400g-dr4\/"},"modified":"2026-07-15T09:47:40","modified_gmt":"2026-07-15T09:47:40","slug":"qdd-400g-dr4","status":"publish","type":"product","link":"https:\/\/optics.carritech.com\/it\/optical-transceivers\/optical-transceivers\/qsfp-dd\/400g-qsfp-dd\/qdd-400g-dr4\/","title":{"rendered":"QDD-400G-DR4"},"content":{"rendered":"<p><strong>Juniper QDD-400G-DR4 compatible 400G QSFP-DD DR4 1310nm 500m transceiver<\/strong><\/p>\n<p>Carritech CT-400G-QDD-DR4 is offered as a compatible alternative to Juniper QDD-400G-DR4 for 400GBASE-DR4 short-reach single-mode applications. This module is matched on the key optical and electrical requirements: QSFP-DD form factor, 400G Ethernet, 1310nm wavelength, up to 500 m reach over SMF, MPO-12\/APC connector and digital diagnostic monitoring.<\/p>\n<p>The transceiver supports 400GBASE-DR4 connectivity using PAM4 signalling with 8 x 53.125Gb\/s electrical lanes and 4 x 106.25Gb\/s optical lanes. It is designed for high-density data centre, cloud and network switch environments where a reliable OEM-compatible 400G QSFP-DD DR4 optic is required.<\/p>\n<p> Alternative references\/search terms include 740-085351.<\/p>\n<p>Carritech Optics supplies compatible transceivers with testing, coding support, short lead times and lifetime warranty coverage.<\/p>","protected":false},"excerpt":{"rendered":"<ul>\n<li>Juniper QDD-400G-DR4 \/ 740-085351 compatible 400G QSFP-DD transceiver alternative.<\/li>\n<li>Matched to Carritech CT-400G-QDD-DR4 for 400GBASE-DR4 applications.<\/li>\n<li>1310nm, 500m, single-mode fibre, MPO-12\/APC, DOM\/DDM.<\/li>\n<li>Suitable for high-density 400G Ethernet and 4 x 100G DR breakout use cases where supported.<\/li>\n<\/ul>","protected":false},"featured_media":4513,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[265],"product_cat":[96,17,91],"product_tag":[370,215],"class_list":["post-5223","product","type-product","status-publish","has-post-thumbnail","product_brand-juniper","product_cat-400g-qsfp-dd","product_cat-optical-transceivers","product_cat-qsfp-dd","product_tag-400gbase-dr4","product_tag-exc","first","instock","shipping-taxable","product-type-simple"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.0 (Yoast SEO v28.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Juniper QDD-400G-DR4 Compatible Transceiver | Carritech Optics<\/title>\n<meta name=\"description\" content=\"Carritech CT-400G-QDD-DR4 is a compatible alternative to Juniper QDD-400G-DR4 for 400G QSFP-DD DR4 1310nm 500m SMF MPO applications.\" \/>\n<meta name=\"robots\" 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