Cisco NXA-SFAN-35CFM-PI Full English Description

Product Overview

Important Note: All fan modules and power supplies installed within the same chassismust adopt identical airflow direction. Mixing PI (intake) and PE (exhaust) airflow modules is unsupported and will cause thermal imbalance, hotspots and overheating risks. Each module contains dual independent internal rotors. If one rotor fails, the remaining rotor provides temporary partial cooling; the entire fan FRU needs full replacement upon module fault. Standard ESD anti-static procedures must be followed during removal and installation.NXA-SFAN series cannot be interchanged with NXA-FAN series fan modules.

Key Features

1. Intelligent Variable-Speed Thermal Regulation

   The fan module dynamically adjusts rotational speed based on real-time internal chassis temperature, operating altitude and thermal load of active ports. Fans operate at low RPM under light workloads to reduce power consumption and acoustic noise, and automatically ramp up speed to boost airflow as temperatures rise. Continuous thermal telemetry data is transmitted to Cisco NX-OS or ACI firmware for comprehensive environmental monitoring.
2. Front-to-Back (Port-side Intake) Airflow Architecture

   Airflow Direction: Cool air enters from the front port panel, and hot air exhausts toward the chassis rear. This airflow scheme fits standard data center rack deployments where switch port panels face the cold aisle. Operators must keep intake and exhaust openings unobstructed to maintain rated cooling efficiency.
3. OIR (Online Insertion and Removal) Support

   Technicians can replace the fan module without powering off or rebooting the host Nexus switch. All maintenance operations are carried out via dedicated fan bays, supporting non-disruptive servicing for leaf and aggregation fabrics. Sufficient functional fan modules must stay installed during replacement activities to avoid thermal protection shutdown.
4. Visual Status LED & Remote Monitoring

   Built-in status LED provides instant local visual feedback:

• Solid Green: All internal rotors operate normally
• Solid Amber/Red: Rotor fault or over-temperature alarm detected
  NX-OS generates environmental syslog entries and sends SNMP traps to centralized monitoring systems immediately once fan anomalies are detected. Users can enable or disable fan serial number display via the[no] hardware fan-spromcommand under NX-OS.

1. Dual-Rotor Internal Redundancy

   Two independent rotors are integrated inside each fan tray. If one internal rotor malfunctions, the second rotor delivers temporary limited cooling capacity. Administrators should arrange replacement promptly to eliminate thermal single-point-of-failure risks.
2. Data Center-Grade Reliability

   Compact brushless DC industrial fan assembly engineered for 24/7 continuous operation in enterprise and cloud data center leaf layers, optimized for modern medium-density 25G/100G FX3/GX/SE series fixed-port Nexus switches.

Supported Hardware Platforms

Not compatible: Nexus 9500/9800 modular chassis, legacy Nexus 9300-PX/TX/PQ Gen1 switches, older Nexus 3000 platforms, Catalyst switching platforms.

Typical Application Scenarios

• Leaf fabric deployments on next-generation Nexus 9000 FX3/GX/SE series fixed switches running standalone NX-OS or ACI fabric mode
• Spare replacement cooling module for port-side intake configured compact Nexus fixed switches
• Data center rack layouts requiring port-facing cold-aisle deployment
• Mission-critical cloud and enterprise infrastructure requiring hot-swappable non-disruptive maintenance

Technical Specifications

• Form Factor: Compact hot-swappable single fan module
• Part Number: NXA-SFAN-35CFM-PI
• Maximum Airflow Rate: 35 CFM
• Airflow Direction: Front-to-Back (Port-side Intake, burgundy handle)
• Reverse Airflow Counterpart: NXA-SFAN-35CFM-PE (Back-to-Front / Port-side Exhaust, blue handle)
• Hot Swappable: Yes (OIR supported under NX-OS / ACI firmware)
• Internal Structure: Dual independent rotors
• Weight: 0.28 lb (0.13 kg)
• Monitoring: Status LED + NX-OS environmental logging & SNMP traps
• Operating Ambient Temperature: 0°C ~ +40°C
• Compliance: UL60950-1, EN60950-1, FCC Class A, CE certified, RoHS compliant

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