Cisco C4503-E-FAN Full English Description

Product Overview

Important Note: This fan tray is chassis-specific hardware. It cannot be interchanged with fan trays for Catalyst 4506-E, 4507R-E or 4510R-E chassis. Individual fans inside the tray are not field-replaceable; the entire tray must be replaced once any internal fan fails. Operating the switch without an installed fan tray triggers critical thermal alarms and may cause permanent hardware overheating damage.

Key Features

1. Intelligent Variable-Speed Thermal Regulation

   The fan tray dynamically adjusts rotational speed based on real-time chassis temperature and network workload. It operates at low RPM under light traffic loads to reduce acoustic noise, and automatically increases airflow during high-temperature operating conditions. Real-time thermal data is transmitted to the Cisco IOS operating system for environmental monitoring.
2. Side-to-Side Airflow Architecture

   Airflow Direction: Right intake → Left exhaust when facing the front panel of chassis. This native thermal design matches Catalyst 4503-E chassis layout, suitable for enterprise wiring closet rack deployments. Consistent airflow guarantees effective heat dissipation for PoE-enabled line cards and supervisor modules.
3. OIR (Online Insertion and Removal) Support

   Technicians can replace the entire fan tray without powering off or rebooting the Catalyst 4503-E switch. Quick-release design simplifies installation and removal to minimize maintenance downtime for campus distribution and access networks.
4. Front Panel Visual Status LED & Remote Monitoring

   Status LED on the front face of the fan tray provides instant local visual monitoring:

• Solid Green: All internal fans operate normally
• Solid Red: One or more internal fans stall or suffer hardware failure
  IOS records environmental event logs and sends SNMP traps to centralized monitoring systems immediately after fan faults are detected.

1. Internal Multi-Fan Redundancy

   Six independent fans are integrated inside one tray. If a single fan fails, remaining functional fans ramp up speed automatically to maintain basic cooling capacity. Administrators should replace the fan tray promptly after any fan failure to eliminate thermal single point of failure risks.
2. Enterprise-Grade Durability

   Industrial long-life fan assembly engineered for 24/7 continuous operation in enterprise campus networks. Optimized to dissipate heat generated by multi-gigabit line cards and high-power PoE modules.

Supported Hardware Platforms

• Catalyst 4503-E (3-slot modular chassis)

Not compatible: Catalyst 4506-E, Catalyst 4507R-E, Catalyst 4510R-E, Catalyst 9000 series switches, all Nexus data center switch platforms.

Typical Application Scenarios

• Enterprise campus distribution & access layer deployments built on Catalyst 4503-E modular switches
• Spare replacement cooling assembly for failed fan trays on Catalyst 4503-E chassis
• Network environments deployed with PoE line cards generating continuous thermal loads
• Enterprise LAN infrastructure requiring non-disruptive hot-swap hardware maintenance

Technical Specifications

• Form Factor: Integrated full fan tray with six independent fans
• Airflow Direction: Side-to-side (right intake, left exhaust facing front)
• Hot Swappable: Yes (OIR supported)
• Power Source: Supplied by switch chassis backplane
• Monitoring: Front status LED + IOS environmental monitoring & 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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