PhoScale
RFQ List 0
Home/ Products/ 400G/ 400G QSFP112 DR4
400G QSFP112 DR4
400G Optical Transceiver

400G QSFP112 DR4

SKU / P/N: PHOS-4QFSD45M121

400G DR4 optical transceiver for AI data center, GPU cluster, reseller and system-integrator projects.

Data Rate
425Gbps
Form Factor
single-port QSFP112
Standard
DR4
Reach
500m @ SMF
Connector
single MPO-12/APC
Max Power
9W
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

This generic-compatible QSFP112 transceiver is a 400Gb/s single-port QSFP112 DR4 single-mode parallel module with a single 4-channel MPO-12/APC fiber interface. The short-reach 4-channel (DR4) design uses 100G-PAM4 modulation and reaches up to 500 m over OS2 single-mode 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 DR4. When connected with a 1:2 breakout cable, only two channels are active on the branch side — the module automatically runs at 200G with reduced power.

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 9W
  • Compliant with QSFP112 MSA and IEEE802.3bs and IEEE802.3ck standards
  • Supports breakout to lower-rate links for flexible fabric design
  • 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
  • 400G to breakout links in high-density fabrics
  • 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 QSFP112
StandardDR4
Lanes4
Rate per Lane106.25Gbps PAM4
Reach500m@SMF
MediaSMF
Fiber Typesingle-mode fiber (SMF)
Connectorsingle MPO-12/APC
Connector PolishAPC
Wavelength1311nm
Max Power9W
Operating Temperature0 to 70C (32 to 158F)
Optical Modulation4x100G-PAM4
Electrical Modulation4x100G-PAM4
FECInbuilt FEC: Yes
IEEE ComplianceIEEE802.3bs和IEEE802.3ck
MSA ComplianceQSFP112 MSA
ProtocolsQSFP112 MSA,IEEE 802.3bs、IEEE 802.3ck,CMIS5.1
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

Related 400G models