Need reliable 25G interconnects that work in Cisco, Juniper, Huawei, or Mellanox/NVIDIA switches without the OEM price tag? FiberMall 25G SFP28 AOC cables give you plug-and-play active optical connectivity from 1 m to 100 m, pre-tested and EEPROM-coded for the hardware you already run.
Trusted by data center operators and telecom engineers worldwide for high-speed, low-latency 25G Ethernet links.
The Hidden Costs of 25G Cabling Decisions
Choosing the wrong cable for a 25G link wastes more than money. Passive DACs are cheap, but they max out around 3–5 m and can block airflow in dense racks. Separate SR transceivers plus patch cords add parts, cleaning, and alignment risk. And “compatible” cables from resellers often arrive with the wrong EEPROM coding, leaving you with link flaps, RMA delays, and angry tenants.
Network engineers and procurement teams need a middle path: a single factory-terminated cable that reaches farther than copper, installs like a patch cord, and is guaranteed to handshake with the switch on day one. That is exactly what a 25G SFP28 active optical cable (AOC) delivers.
25G SFP28 AOC Cables Built for Your Switch Hardware
FiberMall manufactures 25G SFP28 AOC cables as an integrated optical assembly: two SFP28 transceiver ends permanently bonded to a multimode fiber ribbon. The active electronics inside each end convert electrical signals to optical, so you get the reach and signal integrity of fiber without buying separate optics or cleaning connectors.
Features That Deliver Stable 25G Links
Hot-Pluggable SFP28 Form Factor
The cable slides into standard SFP28 ports on switches, NICs, and storage controllers. No tools, no fiber cleaning, no separate transceiver alignment required.
850 nm VCSEL Over OM3/OM4 MMF
It features a single 3.3 V supply, < 1 W power consumption per end, and digital diagnostic monitoring (DDM/DOM) via I²C. You get the bandwidth of 25 Gigabit Ethernet with power and thermal headroom for dense racks.
Multi-Rate Support
Most FiberMall 25G SFP28 AOC cables support data rates from 10.31 Gbps up to 25.78125 Gbps. By utilizing clock and data recovery (CDR) bypass capabilities, they can often operate smoothly in 10G SFP+ ports when the host device permits it. Always verify switch firmware and port capabilities before deploying.
Full Standards Compliance
IEEE 802.3by, SFF-8402, SFF-8431, SFF-8432, SFF-8472, and RoHS compliance keep your network aligned with industry specs and enterprise procurement requirements.
Burn-In and Compatibility Testing
Each cable runs through temperature cycling, mechanical flex, and platform-specific compatibility checks before shipment.
25G SFP28 AOC vs. DAC: Which One Do You Need?
When evaluating interconnects, comparing the key attributes of Passive DACs and AOCs makes the choice clear:
• Typical Reach: Passive DACs are limited to 0.5–5 m (often requiring RS-FEC for lengths over 3 m), whereas AOCs comfortably span 1–100 m.
• Cable Medium: DACs use copper twinax; AOCs utilize OM3/OM4 multimode fiber.
• Power Consumption: DACs draw ~0 W (passive), while AOCs draw a minimal < 1 W per end.
• EMI Immunity: DACs are susceptible to electromagnetic interference, but AOCs offer excellent immunity.
• Cable Bulk: DACs are noticeably thicker and heavier; AOCs remain thin, light, and flexible.
• Best Use Case: Choose DACs for same-rack, server-to-switch connections. Choose AOCs for cross-aisle, end-of-row, high-EMI environments, or airflow-constrained racks.
If your link is inside the same rack and under 3 m, a passive DAC is usually the cheapest choice. For anything longer, more flexible, or exposed to electrical noise, a 25G SFP28 AOC is the cleaner, more reliable option.
When to Choose 25G SFP28 AOC Over Separate Transceivers
AOC cables sit perfectly between passive DACs and discrete optics. Choose a 25G SFP28 AOC when:
• The link is 5–100 m, and copper is too short or too bulky.
• You want one SKU instead of two transceivers plus patch cords.
• The cable route passes power cables, UPS gear, or RF equipment where EMI is a concern.
• Rack airflow and cable management are priorities.
• You need fast deployment without fiber cleaning or polarity checks.
Common applications include top-of-rack to end-of-row switch links, storage-area-network interconnects, HPC cluster fabric, and 5G fronthaul or midhaul aggregation points.
Technical Specifications
• Form factor: SFP28 to SFP28
• Data rate: Up to 25.78125 Gbps
• Wavelength: 850 nm
• Fiber type: OM3 / OM4 multimode fiber
• Max distance: Up to 70 m (OM3) / 100 m (OM4)
• Supply voltage: 3.3 V
• Power consumption: < 1 W per end
• Operating temperature: 0°C to 70°C
• Digital diagnostics: DDM/DOM via I²C
• Compliance: IEEE 802.3by, SFF-8402, SFF-8431, SFF-8432, SFF-8472, RoHS
• Cable jacket: LSZH or OFNP (customizable)
• Standard lengths: 1 m, 3 m, 5 m, 7 m, 10 m, 15 m, 20 m, 25 m, 30 m, 50 m, 75 m, 100 m
OEM Compatibility Matrix
FiberMall 25G SFP28 AOC cables are coded to work with leading networking platforms. Common compatible part numbers include:
• Cisco: SFP-25G-AOC1M through SFP-25G-AOC10M
• Juniper: JNP-25G-AOC-1M through JNP-25G-AOC-30M
• Huawei: SFP-25G-AOC-3M through SFP-25G-AOC-20M
• H3C: SFP-25G-D-AOC-1M through SFP-25G-D-AOC-10M
• Arista: AOC-S-S-25G-xM
• Mellanox/NVIDIA: MFA2P10-Axxx
• HPE / Dell: Compatible equivalents available
Frequently Asked Questions
What is the maximum distance of a 25G SFP28 AOC?
Most 25G SFP28 AOC cables reach up to 70 m over OM3 fiber and 100 m over OM4 fiber. Some designs support shorter or longer ranges; confirm the datasheet for your exact SKU.
What is the difference between 25G SFP28 AOC and DAC?
AOC uses active optical transceivers bonded to fiber, giving longer reach, lighter weight, and excellent EMI immunity. DAC uses copper twinax, is limited to short distances, and is usually cheaper for same-rack links.
Is this cable compatible with Cisco, Mellanox, Huawei, or Juniper switches?
Yes. FiberMall pre-codes the EEPROM for each target platform. Provide your switch or NIC model when requesting a quote and we will confirm the correct coding.
What lengths are available?
Standard lengths range from 1 m to 100 m. Custom lengths are available for qualified volume orders.
Does 25G SFP28 AOC support DDM/DOM?
Yes. The cable supports digital diagnostic monitoring over I²C, including temperature, voltage, bias current, and optical power readings where applicable.
What is the power consumption?
Typical power consumption is less than 1 W per end, or under 2 W for the entire cable.
Is 25G SFP28 AOC backward compatible with 10G SFP+?
Many multi-rate cables can operate from 10.31 Gbps to 25.78125 Gbps, so they may work seamlessly in 10G SFP+ ports (often utilizing a CDR bypass). Compatibility depends on the host device firmware and port configuration.
Can I get a custom length or custom EEPROM coding?
Yes. FiberMall supports custom lengths, custom EEPROM coding, private labeling, and OEM/ODM production for volume customers.
When should I choose AOC over DAC in a data center?
Choose AOC when the link exceeds 3–5 m, runs through high-EMI areas, requires better airflow, or when you want a single part number instead of separate optics and patch cords.
