Lenovo BF10 Dual Rate 10G/25G SFP28 850nm 85°C Transceiver — 02YH159

The Lenovo 02YH159 is an alternate part number for the BF10 series dual-rate SFP28 optical transceiver, equivalent to Lenovo option part 4TC7A69045. It supports both 10 Gigabit Ethernet (10GbE) and 25 Gigabit Ethernet (25GbE) in a single SFP28 module, operating at 850nm wavelength with a maximum operating temperature of 85°C for short-reach (SR) multimode fiber (MMF) connections. As a Lenovo-validated component, it is fully certified for use in Lenovo ThinkSystem servers and networking equipment. The dual-rate capability provides flexibility to connect to both 10GbE and 25GbE infrastructure without changing transceivers.

Key Specifications

• Part Number / MPN: 02YH159
• Equivalent Part Number: 4TC7A69045
• Manufacturer: Lenovo
• Model: BF10
• Form Factor: SFP28
• Data Rate: Dual Rate — 10GbE and 25GbE
• Wavelength: 850nm
• Fiber Type: Multimode Fiber (MMF)
• Connector: LC Duplex
• Max Operating Temperature: 85°C
• Reach: Short Reach (SR)
• Compatible Systems: Lenovo ThinkSystem servers and switches

Transceiver & Interface Specifications

• Form Factor: SFP28 (Small Form-factor Pluggable 28)
• Data Rate: Dual Rate — 25Gbps (25GbE) and 10Gbps (10GbE)
• Wavelength: 850nm (VCSEL laser)
• Fiber Type: Multimode Fiber (MMF) — OM3 or OM4 recommended
• Connector: LC Duplex
• Reach: Up to 100m on OM4 MMF at 25GbE; up to 300m on OM3 at 10GbE
• Operating Temperature: 0°C to 85°C
• Protocol: IEEE 802.3by (25GBASE-SR), IEEE 802.3ae (10GBASE-SR)
• Hot-Pluggable: Yes
• Digital Diagnostics: Yes — DDM/DOM support for real-time monitoring

Features

• Alternate part number for 4TC7A69045 — functionally identical BF10 SFP28 transceiver
• Dual-rate 10G/25G — single transceiver supports both 10GbE and 25GbE
• 850nm VCSEL laser — industry-standard short-reach multimode fiber optics
• 85°C max operating temperature — suitable for high-density, high-temperature data center environments
• SFP28 form factor — fits SFP28 and SFP+ slots (10G mode in SFP+ slots)
• LC duplex connector — standard MMF patch cable connectivity
• Hot-pluggable — insert and remove without powering down the host system
• Digital Diagnostics Monitoring (DDM/DOM) — real-time monitoring of temperature, voltage, TX/RX power
• Lenovo validated — tested and certified for ThinkSystem servers and switches
• RoHS compliant

Compatibility

• Validated for Lenovo ThinkSystem servers with SFP28 or SFP+ network adapters
• Compatible with Lenovo ThinkSystem networking switches supporting SFP28
• Requires multimode fiber (MMF) OM3 or OM4 with LC duplex connectors
• Dual-rate: operates at 25GbE in SFP28 slots, 10GbE in SFP+ slots
• Always verify compatibility with Lenovo ServerProven or ThinkSystem option compatibility matrix before ordering

Use Cases

• Data center top-of-rack (ToR) server-to-switch 25GbE connectivity
• Dual-rate deployments bridging 10GbE and 25GbE infrastructure
• High-density server connectivity in Lenovo ThinkSystem environments
• Storage networking — NVMe-oF, iSCSI, and NFS over 25GbE
• High-performance computing (HPC) cluster interconnects

Ordering Notes

• 02YH159 is an alternate part number for 4TC7A69045 — functionally identical
• Requires OM3 or OM4 multimode fiber with LC duplex patch cables — sold separately
• Dual-rate: confirm host port speed (10G or 25G) before deployment
• Check Lenovo ServerProven compatibility list for your specific ThinkSystem model