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400G QSFP112 FR4
400G Optical Transceiver

400G QSFP112 FR4

SKU / P/N: PHOS-4QFSF42LC1

400G FR4 optical transceiver for AI data center, GPU cluster, reseller and system-integrator projects.

Data Rate
425Gbps
Form Factor
single-port QSFP-DD
Standard
FR4
Reach
2km @ SMF
Connector
LC connector
Max Power
10W
Spot Available Lead time: 2–4 weeks
Bulk package:
Custom Quote
Custom bulk order? Beyond 2000 pcs, mixed models or annual supply — use Custom Quote to negotiate your discount offline.

Bulk availability changes frequently. Discounts shown are indicative volume tiers — submit an RFQ to confirm the latest price, lead time and allocation. Prices are provided by quote — no public list price.

Link-up guaranteedCoded to any switch / NIC platform
Lifetime warrantyAdvance replacement
Ships from US warehouseFast, no import hassle
Per-unit testedTest report + power-on video

Product description

Generic 400GBASE-FR4 QSFP112 Ethernet optical transceiver — single-mode, 1310 nm, 2 km, duplex LC/UPC, DOM.

This generic QSFP112 transceiver is a 400Gb/s single-port QSFP112 FR4 single-mode parallel module with a single 4-channel duplex LC/UPC fiber interface. The 4-channel (FR4) design uses 100G-PAM4 modulation and reaches up to 2000 m over OS2 single-mode LC fiber.

The QSFP112 transceiver can be used in QSFP112/QSFP-DD switches and Ethernet adapters. With low latency, low power consumption and high reliability, it uplinks to 800G Ethernet switches in spine-leaf fabrics and interoperates with 400G QSFP-DD or OSFP FR4 for diverse applications.

An ideal solution for supercomputing, it integrates seamlessly into compute and storage infrastructure for efficient high-performance interconnect.

Product highlights

  • Integrated low-power DSP for stable performance at scale
  • Optimized power budget, max power consumption 10W
  • Compliant with QSFP-112 MSA and IEEE802.3cu standards
  • Backward compatible with existing QSFP form-factor ports
  • Tested on live switch / NIC platforms to ensure performance, quality and reliability

Applications

  • AI data center & GPU cluster interconnect
  • Spine-leaf switching fabric
  • Data center interconnect (DCI) and campus links
  • Hyperscale, cloud and high-performance computing networks

Supply status meaning

In stock or short-notice availability

Data Rate425Gbps
Max Data Rate4x106.25Gbps
Form Factorsingle-port QSFP-DD
StandardFR4
Lanes4
Rate per Lane106.25Gbps PAM4
Reach2km@SMF
MediaSMF
Fiber Typesingle-mode fiber (SMF)
ConnectorLC connector
Wavelength1271nm,1291nm,1311nm,1331nm
Max Power10W
Operating Temperature0 to 70C (32 to 158F)
Optical Modulation4x100G-PAM4
Electrical Modulation4x100G-PAM4
FECInbuilt FEC: Yes
IEEE ComplianceIEEE802.3cu
MSA ComplianceQSFP-112 MSA
ProtocolsQSFP-112 MSA，CMIS Rev 5.2，IEEE 802.3cu，OIF-CEI-112G-VSR-PAM4
Host Interfacesingle-port QSFP112
Warranty5

Four bulk tiers — the larger the volume, the better the discount. Actual pricing is confirmed by RFQ based on quantity, customer tier and lead time; there is no single-unit retail.

PackageQuantityVolume discountBest for
Starter Pack 100 pcs Base bulk price Trial order / small channel Request Quote
Growth Pack 500 pcs Save ~5% vs. Starter Reseller / regular supply Request Quote
Project Pack Popular 1000 pcs Save ~10% vs. Starter AI data center project Request Quote
Strategic Pack 2000 pcs Save ~15% vs. Starter Annual / channel agreement Request Quote
Custom bulk order 2000+ pcs Negotiated offline Annual / strategic supply Contact Sales

Ask a compatibility question

Need this model to match a specific switch, NIC or OEM coding? Send us the platform and we'll confirm compatibility and coding options.

  • Compatible coding for major switch / NIC platforms on request
  • Alternative model recommendations
  • Breakout and cabling guidance

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