NetAPI 400G QSFP-DD optical transceiver, front view

400 G - QSFP-DD

Single Mode / 150 KM / Cisco
$2,395.00
$2,395.00
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NetAPI 400G QSFP-DD optical transceiver, front view
  • NetAPI 400G QSFP-DD optical transceiver, front view
  • NetAPI 400G QSFP-DD optical transceiver, side profile
  • NetAPI 400G QSFP-DD transceiver, angled detail
  • NetAPI 400G QSFP-DD transceiver showing MPO-12 / MPO-16 connectors
  • NetAPI 400G QSFP-DD transceiver in AI/ML spine deployment
  • NetAPI 400G QSFP-DD optical transceiver, front view
  • NetAPI 400G QSFP-DD optical transceiver, side profile
  • NetAPI 400G QSFP-DD transceiver, angled detail
  • NetAPI 400G QSFP-DD transceiver showing MPO-12 / MPO-16 connectors
  • NetAPI 400G QSFP-DD transceiver in AI/ML spine deployment
400 G - QSFP-DD

400 G - QSFP-DD

$2,395.00
$2,395.00
Device interface
Reach
Vendor Name

QSFP-DD — 400G. Double-density 400G — backward-compatible cage, eight electrical lanes.

Overview

QSFP Double-Density (QSFP-DD MSA, IEEE 802.3ck). Eight electrical lanes in a slightly deeper QSFP envelope. Mechanically backward-compatible — QSFP-DD cages accept QSFP28 modules at 100G, which is the standard migration path from 100G to 400G data-center fabric. CMIS-based management.

Key specifications

Speed 400G
Electrical interface 8 lanes × 26.5625 Gbaud PAM4 (50G per lane)
Signalling PAM4 with KP4 / RS-FEC
FEC RS-FEC (544,514) required
Typical power draw 7 W – 14 W typical; up to 18 W for coherent ZR / ZR+ variants
Connectors MPO-12 (DR4, FR4), MPO-16 (DR8 / SR8), LC duplex (LR4, ER4), QSFP-DD DAC / AOC
MSA / standards QSFP-DD MSA rev 5.x (mechanical); CMIS 4.0 / 5.0 (management)
Introduced 2017 (QSFP-DD MSA), 2020 (IEEE 802.3bs / cu)

Available variants

Part number Standard Wavelength Fiber Reach Notes
NAP-QSFPDD-SR8 400GBASE-SR8 850 nm MM OM4 70 m MPO-16, 8 parallel
NAP-QSFPDD-SR4.2 400GBASE-SR4.2 (BiDi) 850/910 nm MM OM4/5 100 m MPO-12
NAP-QSFPDD-DR4 400GBASE-DR4 1310 nm SM parallel 500 m MPO-12, 4×100G PAM4
NAP-QSFPDD-FR4 400GBASE-FR4 LAN-WDM SM 2 km LC duplex
NAP-QSFPDD-LR4 400GBASE-LR4 LAN-WDM SM 10 km LC duplex
NAP-QSFPDD-ER4 400GBASE-ER4 LAN-WDM SM 40 km SOA-based
NAP-QSFPDD-400ZR 400G coherent ZR C-band SM 80–120 km OIF 400ZR, DSP-based
NAP-QSFPDD-400ZR-PLUS 400G ZR+ (OpenZR+) C-band SM 500–1000 km+ Carrier-grade DCI
NAP-QSFPDD-BREAKOUT 400G → 4×100G DR 1310 nm SM parallel 500 m Standard fabric breakout

Coded for these platforms

Every NetAPI QSFP-DD module is OEM-coded for the target switch and validated against current production firmware. Common targets:

  • Cisco Nexus 9300-GX/GX2, 9408, Silicon One platforms
  • Juniper QFX5130, QFX5220, QFX5240, MX10K
  • Arista 7060X5, 7280R3, 7500R3, 7800R3, 7060X6
  • Dell Z9332F, Z9432F, S5448F
  • Aruba CX 9300, 10000
  • NVIDIA Spectrum-4 (SN5000 series)

Recommended for

  • Modern data-center fabric (spine, leaf, ToR aggregation)
  • AI/ML training cluster east-west traffic (400G RoCE)
  • Hyperscale spine-spine links
  • Coherent DCI for metro and long-haul (400ZR / ZR+)

Engineering notes

  • 400ZR and 400ZR+ modules can draw 15–18 W. Verify chassis per-port power budget before populating every cage with coherent optics.
  • PAM4 sensitivity to dirty connectors is real — 400G installs warrant a fiber scope and a click-cleaner per port.
  • QSFP-DD cages accept QSFP28 modules at 100G — primary migration path from 100G to 400G is to deploy QSFP-DD-capable switches early and refresh optics later.

Need a coding or reach you don't see? NetAPI custom-codes against the full Cisco, Juniper, Arista, Dell, HPE, Aruba, Palo Alto, Huawei, and NVIDIA OUI sets. Contact us with your switch model and we'll quote.

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