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Hong Kong Starsurge Group Co., Limited
Hong Kong Starsurge Group Co., Limited
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Mellanox MMA2P00-AS / MMA2P00-ASHT 25GbE SR SFP28 Optical Transceiver |850nm MMF

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Hong Kong Starsurge Group Co., Limited

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Mellanox MMA2P00-AS / MMA2P00-ASHT 25GbE SR SFP28 Optical Transceiver |850nm MMF

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Brand Name Mellanox
Model Number MMA2P00-AS
Minimum Order Quantity 1pcs
Price Negotiate
Payment Terms T/T
Supply Ability Supply by project/batch
Delivery Time Based on inventory
Packaging Details outer box
condition new and original
Availability stock
Technology Ethernet
Max Speed 25GbE
Connector Type SFP28
Transceiver Reach up to 100m
Detailed Product Description

Mellanox MMA2P00-AS / MMA2P00-ASHT 25GbE SR SFP28 Optical Transceiver

High-performance 850nm multimode SFP28 for 25GbE & 10GbE Ethernet, featuring selectable retiming, extended temperature options (up to 85°C), and IEEE compliance.

 Data Rate: 25.78125 GBd (25GbE)
 Connector: Dual LC, multimode (OM3/OM4)
Wavelength: 850nm VCSEL
Max Reach: 100m OM4 / 70m OM3 @25G
Power (typ): 0.45W (no retiming) / 0.7W (retiming)
Temperature: 0‑70°C (MMA2P00-AS); 0‑85°C (MMA2P00-ASHT)

Product Overview

The MMA2P00-AS and MMA2P00-ASHT are pluggable SFP28 optical transceivers from Mellanox® designed for high-speed 25GbE connectivity. They leverage advanced integrated circuit technology to deliver exceptional signal integrity at low power consumption. Operating at a nominal wavelength of 850nm over dual multimode fibers, these modules are fully compliant with SFF-8402 and IEEE 802.3bm specifications. The optical interface uses standard LC duplex connectors, supporting data rates up to 25.78125 GBd. With selectable retiming on both transmitter and receiver, they offer flexibility for 25G retimed or 10G non‑retimed operation. Rigorous production testing ensures reliable out‑of‑box performance.

Key Features

  • Selectable retiming for both transmitter and receiver paths (on/off via register)
  • Programmable Rx output amplitude and pre‑emphasis for signal optimization
  • Programmable Tx input equalizer and input squelch function
  • Compliant with SFF-8402, SFF-8472, IEEE 802.3 25GBASE‑SR and 10GBASE‑SR
  • 3.3V power supply with SFP28 Power Level 1 (1.5W max) – actual dissipation as low as 0.45W
  • Bit Error Rate (BER) better than 1E‑15
  • Extended operating case temperature: 0°C to 85°C (MMA2P00-ASHT) with internal DDM readout up to 90°C
  • Class 1 laser safety (IEC/EN 60825-1 compliant)
  • Hot‑pluggable SFP28 form factor
  • RoHS compliant (lead‑free)

Technology & Integration

Mellanox’s integrated circuit technology enables low power and high performance inside the SFP28 package. The module includes a VCSEL array (850nm) and a PIN receiver paired with a DSP-based retiming function. The retiming can be selectively enabled for 25G operation or bypassed for 10G backward compatibility. Digital Diagnostics (DDM) per SFF-8472 provides real‑time monitoring of temperature, voltage, laser bias, and optical power. The programmable Tx equalizer compensates for host board losses, while the Rx emphasis adjusts to varying link conditions, ensuring robust eye openings even over long multimode fibers.

Typical Deployments

  • Data Center Interconnects: 25GbE links between servers, switches, and storage within racks or across adjacent racks (up to 100m on OM4).
  • 10GbE Legacy Integration: Automatic rate fallback (by disabling retiming) for 10GBASE‑SR connections, protecting existing investments.
  • Enterprise Core/Aggregation: High‑density SFP28 ports in top‑of‑rack switches connecting to 25G capable NICs.
  • High‑Performance Computing (HPC): Low latency and low BER for cluster interconnects.

Compatibility & Interoperability

System / StandardCompliance / Notes
IEEE 802.3 25GBASE‑SRFull compliance (with retiming enabled)
IEEE 802.3 10GBASE‑SRFull compliance (retiming disabled)
SFF-8402 / SFF-8472Mechanical and management interface
Mellanox Switches & AdaptersTested with Spectrum switches, ConnectX‑4/5/6 NICs
Broadcom / Cisco / Arista 25G platformsVendor‑certified design; interoperability expected but confirm per platform

Technical Specifications

ParameterValue / Range
Supply Voltage3.135 V – 3.465 V (3.3V nominal)
Power Dissipation (no retiming)0.45 W typ, 0.5 W max
Power Dissipation (retiming)0.7 W typ, 0.8 W max
Data Rate (optical)up to 25.78125 GBd (NRZ)
Wavelength840 – 860 nm (nominal 850nm)
Maximum Reach (25GbE)70m on OM3, 100m on OM4
Maximum Reach (10GbE)100m on OM3 (300m typical at 10G)
Damage Threshold (average)3.4 dBm (max) – Not publicly specified
Operating Case Temp (MMA2P00-AS)0 °C to 70 °C (internal DDM up to 75°C)
Operating Case Temp (MMA2P00-ASHT)0 °C to 85 °C (internal DDM up to 90°C)
Storage Temperature-40 °C to 85 °C
Relative Humidity (operating)5% – 85% (non‑condensing)
BER< 1E-15
Connector / Fiber TypeDual LC / Multimode (OM3/OM4)

Selection Guide: MMA2P00-AS vs MMA2P00-ASHT

Part NumberOperating TempDDM ReadoutBest For
MMA2P00-AS0°C to 70°CUp to 75°C internalStandard data center / enterprise environments
MMA2P00-ASHT0°C to 85°CUp to 90°C internalOutdoor, industrial, or high‑temp zones

Both support identical optical and electrical characteristics; choose HT variant for extended case temperature requirements.

Advantages & Business Value

  • Power efficiency: As low as 0.45W reduces thermal load in high‑density deployments.
  • Future‑ready & backward compatible: Single SKU covers both 25G and 10G infrastructure.
  • Extended temperature range (HT): Enables deployment in non‑controlled environments without extra cooling.
  • Mellanox quality: Rigorous production testing ensures lowest field failure rates.
  • Vendor‑certified: Engineered and tested by Mellanox, guaranteeing interoperability with Mellanox systems and reduced compatibility risk.

Service & Warranty Information

Mellanox LinkX optical transceivers include a 1‑year limited hardware warranty covering parts repair or replacement. Technical support is available through Mellanox’s global partners. For advanced replacement options or extended support, please contact your sales representative.

All modules are RoHS compliant and meet Class 1 laser safety requirements.

 Buyer Checklist

  • Verify your switch/router supports SFP28 (25G) or SFP+ (10G) ports.
  • Choose MMA2P00-ASHT if ambient temperature may exceed 70°C.
  • Ensure multimode fiber type (OM3/OM4) and distance (≤100m) meet your link budget.
  • Confirm retiming setting according to your host’s requirements (register control).
  • For large deployments, request interoperability test results with non‑Mellanox equipment.

Frequently Asked Questions

Q: Can I use MMA2P00-AS in a 10GbE SFP+ slot?
A: Yes. With retiming disabled (via register or automatic negotiation), it operates as a 10GBASE‑SR module. Confirm host support for 10G SFP+.
Q: What is the difference between MMA2P00-AS and MMA2P00-ASHT?
A: The ASHT version is qualified for 85°C operating case temperature (vs. 70°C) and allows internal DDM readings up to 90°C.
Q: Does this transceiver work on OM2 fiber?
A: Not recommended. It is optimized for OM3/OM4. Reach on OM2 is not specified and may be limited.
Q: Is the module coded with Mellanox vendor information?
A: Yes, it is factory‑programmed with Mellanox data, ensuring correct identification in Mellanox hosts. Third‑party platforms may require custom coding – please verify.

Precautions & Handling

  • ESD sensitive – use proper grounding when handling.
  • Avoid looking into the optical ports with magnification when module is powered.
  • Do not exceed absolute maximum ratings (supply voltage, damage threshold).
  • Clean optical connectors before mating; inspect for contamination.
  • Ensure host device provides adequate ventilation, especially in HT environments.

Hong Kong Starsurge Group Co., Limited is a technology-driven provider of network hardware, IT services, and system integration solutions. Founded in 2008, the company serves customers worldwide with products including network switches, NICs, wireless access points, controllers, cables, and related networking equipment. Backed by an experienced sales and technical team, Starsurge supports industries such as government, healthcare, manufacturing, education, finance, and enterprise. The company also offers IoT solutions, network management systems, custom software development, multilingual support, and global delivery. With a customer-first approach, Starsurge focuses on reliable quality, responsive service, and tailored solutions that help clients build efficient, scalable, and dependable network infrastructure.

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Product Tags: Mellanox 25GbE SR SFP28 transceiver   850nm MMF optical transceiver   Mellanox MMA2P00-ASHT transceiver with warranty  
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