400GBASE-VR4 OSFP112 Optical Module: 400G-OSFP112-50
400G OSFP112 VR4 Transceiver Overview
The 400GBASE-VR4 OSFP112 Optical Module is a 400 Gigabit Ethernet transceiver in the OSFP112 form factor, built for OSFP112 host systems. The 400GAUI-4 electrical interface runs four lanes at 106.25 Gbps PAM4, supporting a maximum data rate of 425 Gbps. On the optical side, four 850nm VCSEL lanes run over multimode fiber through an MTP/MPO-12 (APC) connector with 8 fibers total, reaching up to 50 meters at a 1.7 dB average link budget. The module implements the 400GBASE-VR4 physical layer per IEEE 802.3db, supports host FEC and DDM monitoring, and follows the OSFP MSA.
- Media Type: 4 Lanes of Multi-Mode Fiber (MMF)
- Connector: MTP/MPO-12 (APC)
- Fiber Count: 8 Fibers
- Maximum Distance: 50 m
- Average Link Budget: 1.7 dB
- Tx Wavelength: 850 nm
- Supported Data Rate: 425 Gbps
- DDM/DOM: Supported
- Forward Error Correction (FEC): Host FEC Supported
- Temperature Range: Standard 0°-70°C
400G OSFP112 VR4 Pricing
SKU:400G-OSFP112-50
Made to Order - 2 Weeks400GBASE-VR4 OSFP112 Optical Module Specification
Form Factor | OSFP112 |
Modulation | PAM4 (Pulse Amplitude Modulation 4-level) |
Media Type | 4 Lanes of Multi-Mode Fiber (MMF) |
Connector | MTP/MPO-12 (APC) |
Fiber Count | 8 Fibers |
Maximum Distance | 50 m |
Average Link Budget | 1.7 dB |
Minimum Optical Budget (OMA) | 1.8 dB |
TX Wavelength | 850 nm |
RX Wavelength | 850 nm |
Supported Data Rate | 425 Gbps |
Supported Ethernet Applications | 400G Ethernet (425 Gbps) |
DDM/DOM | Supported |
Forward Error Correction (FEC) | Host FEC Supported |
Transmitter Type | VSCEL Laser |
Tx Wave Bandwidth | 106 nm |
Average Launch Power (Min) Each Lane | -4.6 dBm |
Average Launch Power (Max) Each Lane | 4 dBm |
Extinction Ratio (Min) | 2.5 dB |
Receiver Type | PIN photodiode |
RX Wave Bandwidth | 106 nm |
Average Receiver Sensitivity (Min) Each Lane | -6.3 dBm |
Average Receiver Sensitivity (Max) Each Lane | 4 dBm |
Receiver Overload | 5 dBm |
Temperature Range | Standard 0°-70°C |
Storage Temperature | -40° to 85°C |
Relative Humidity | 5 to 85% |
Power Consumption (Max) | 12 W |
Power | +3.3V single power supply |
Compliance | CE, RoHS, Class 1 FDA and IEC60825-1 Laser Safety Compliant, IEEE 802.3db, IEEE 802.3ck, OSFP MSA |
Electrical Interface | 400GAUI-4 (4x106.25G PAM4) |
Top Type | Flat-Top (RHS) |
400GBASE-VR4 OSFP112 Optical Module Datasheet
v2Complete technical specifications and product details
400GBASE-VR4 OSFP112 Optical Module Description
The 400GBASE-VR4 OSFP112 Optical Module is a 400 Gigabit Ethernet transceiver in the flat top (RHS) OSFP112 form factor for OSFP112 host systems, with a 400GAUI-4 electrical interface of four lanes at 106.25 Gbps PAM4 and a maximum supported data rate of 425 Gbps.
Four lanes of 850nm VCSEL lasers pair with PIN photodiode receivers over multimode fiber through an MTP/MPO-12 (APC) connector carrying 8 fibers. Launch power per lane spans -4.6 dBm to 4 dBm, receiver sensitivity per lane spans -6.3 dBm to 4 dBm, minimum extinction ratio 2.5 dB.
The module implements 400GBASE-VR4 per IEEE 802.3db, a very short reach spec over 4 lanes of MMF at 850nm, shorter reach than 400GBASE-SR4 on the same media and wavelength class. Reach is up to 50 meters at a 1.7 dB link budget, and host RS-FEC (KP4) is required, as with all 400GBASE-R links.
DDM and DOM report transmit and receive power, temperature and bias current, and CDR is supported on the electrical interface. Power draw is bounded at 12W max, rated 0 to 70 degrees Celsius operating and -40 to 85 degrees Celsius storage.
This module targets OSFP112 host systems only. OSFP112 is the four-lane 400GAUI-4 variant of the OSFP MSA, mechanically distinct from QSFP112 and QSFP-DD host ports. Verify the target host port is OSFP112 before ordering; it will not fit a QSFP112 or QSFP-DD cage.
The module carries CE and RoHS marking, Class 1 FDA and IEC 60825-1 laser safety compliance, and OSFP MSA conformance. It ships made to order with a 5-year warranty. For volume quantities or platform qualification questions, contact our sales team.
Frequently Asked Questions
What does 400GBASE-VR4 mean and how is it different from 400GBASE-SR4?
400GBASE-VR4 is a very short reach physical layer defined in IEEE 802.3db, running 4 lanes of multimode fiber at 850nm (4x100G PAM4) to a reach of at least 50 meters, 30 meters on OM3 and 50 meters on OM4. 400GBASE-SR4 is the short reach sibling on the same multimode fiber and 850nm wavelength class, rated to 100 meters. The two share the same media and wavelength class but differ in reach class.
What connector does the OSFP112 VR4 use?
The module uses an MTP/MPO-12 (APC) connector with 8 fibers total, 4 for transmit and 4 for receive, carrying the 4 parallel 850nm lanes.
Does the 400G OSFP112 VR4 require host FEC?
Yes. This is a 400GBASE-R optic with no internal FEC, so host RS-FEC (KP4) must be enabled on the switch port, as required by the 400GBASE-R architecture for all 400G Ethernet links.
What is the difference between OSFP112 and OSFP, and which electrical interface does this module use?
OSFP112 is the four-lane 400GAUI-4 variant within the OSFP MSA family, running each lane at 106.25 Gbps PAM4. Standard OSFP uses the eight-lane 400GAUI-8 electrical interface instead. OSFP112 is mechanically distinct from QSFP112 and QSFP-DD cages, so this module is built for OSFP112 host systems only.