Cisco N9K-SC-A Full Official Technical Specification Document

1. Product Overview

Official Full Designation

Core Definition

SKU Naming Breakdown

1. N9K: Standard prefix for Cisco Nexus 9000 series modular chassis switch hardware
2. SC: System Controller, dedicated chassis hardware monitoring and synchronization module
3. A: A-generation base system controller silicon platform
4. =: Optional suffix for standalone spare-only system controller kits (N9K-SC-A=)

Product Lifecycle Notice

• Official Global Release Year: 2017
• End-of-Sale (EoS) Status: Active production hardware as of 2026, no official EoS announcement released
• Minimum Supported NX-OS Software Version: NX-OS Release 9.3(16) and later; fully compatible with all mainstream ACI Spine/Leaf OS releasesCisco
• Software Maintenance Status: Active Cisco TAC engineering support, regular feature updates and critical security patch releases available via Cisco DNA support contracts
• Legacy Status: Not end-of-life hardware; genuine spare parts, certified firmware upgrades and 24×7 technical support are fully accessible through authorized Cisco distribution channels

Mandatory Deployment Rules for Nexus 9500 Chassis

1. Redundancy hardware consistency: Two identical N9K-SC-A modules must be deployed in the dedicated dual system controller slots; mixing different system controller models triggers synchronization errors and disables chassis full HA functionalityCisco.
2. Compatibility matching rule: Works with all supervisor variants (N9K-SUP-A, SUP-A+, SUP-B, SUP-B+) and all line card generations (-R, -R2, EX, FX cloud-scale series) on Nexus 9500 chassis.
3. Hot-swap rule: Full hot-swappable design; modules can be inserted, removed or replaced without powering down the entire chassis, and the standby system controller maintains continuous state synchronization during maintenance operations.

Standard Factory Complete Bundle Contents

1. N9K-SC-A base hot-swappable system controller module with integrated passive aluminum heat sink assembly
2. Front panel port dust blanking plugs for unused management and timing ports
3. Chassis mounting retention screws and anti-static ESD handling storage bag
4. Quick-start hardware installation guide covering system controller insertion, removal and redundant synchronization operation procedures
5. Global regulatory compliance, safety, and electromagnetic interference (EMI) certification documentation packet

Core Integrated Functional Capabilities

• Full chassis distributed hardware real-time telemetry collection: Continuous monitoring of all line cards, fabric modules, supervisor modules, AC/DC power supply units, fan trays, internal temperature sensors, voltage, current and airflow metrics; processes more than 800 hardware metrics per second for real-time fabric health evaluation.
• Low-latency inter-supervisor state synchronization: Maintains dedicated communication channels between active and standby supervisor engines, supporting stateful SSO (Stateful Switchover) with sub-50ms hitless failover to eliminate data-plane traffic interruption during supervisor hardware failure or maintenance.
• Predictive hardware fault detection and early warning: Embedded machine learning predictive fan failure algorithms trained on massive field operation logs to pre-alert administrators of potential fan, power supply and line card hardware degradation before critical faults occur.
• Fabric module redundancy coordination: Monitors the operational status of all rear fabric crossbar modules, dynamically balancing traffic load across healthy fabric modules and triggering fault isolation alarms when any fabric module goes offline.
• Chassis environmental protection control: Automatically adjusts fan tray rotation speed based on real-time internal chassis temperature readings to balance cooling performance and power consumption; triggers emergency chassis power-off protection if over-temperature or over-voltage dangerous conditions are detected.
• Dual-mode OS compatibility: Natively supports synchronization for both NX-OS traditional IP leaf-spine fabric mode and ACI multi-tenant policy-driven fabric mode, coordinating chassis hardware state reporting for both operating environments.
• Comprehensive hardware fault alerting mechanism: Generates standardized syslog messages, SNMP traps and real-time streaming telemetry fault notifications for all chassis hardware abnormalities, enabling centralized monitoring platforms to receive instant chassis health alerts.

2. Hardware & Performance Specifications

Core Controller Hardware Resources

• Embedded dedicated low-power control ASIC for chassis hardware monitoring and cross-module synchronization
• On-board local non-volatile flash storage for chassis hardware inventory archives, fault log storage and crash dump recording
• MTBF (Mean Time Between Failures): 526,750 hours, carrier-grade long-term continuous operation reliability

Power Consumption Specifications

• Typical operating power draw under normal chassis monitoring load: 12 Watts
• Maximum full-load power consumption under peak telemetry collection workloads: 24 WattsCisco
• Power Delivery: Powered exclusively through the Nexus 9500 chassis dedicated system controller slot backplane; no external power supply connectors on the module

Thermal & Environmental Operating Parameters

• Certified Continuous Operating Temperature Range: 0°C to 40°C (32°F to 104°F) standard data center environment
• Extended Validated Short-Term Operating Temperature: 0°C to 55°C (32°F to 131°F)
• Storage & Transport Temperature Range: -40°C to 70°C (-40°F to 158°F)
• Operating Relative Humidity: 10% to 90% RH, non-condensing
• Operating Altitude: Certified operational range -150 m to 2,000 m (-500 ft to 6,500 ft); extended validated range up to 3,000 m (10,000 ft)
• Cooling Design: Fanless passive aluminum heat sink assembly mounted on the system controller PCB; cooling airflow is supplied by the host Nexus 9500 chassis rear fan trays
• Airflow Direction: Port-side intake (front panel intake), rear exhaust standard front-to-back airflow design

Physical Form Factor & Weight

• Form Factor: Standard Nexus 9500 front hot-swappable vertical system controller module form factor, compatible with dedicated dual SC slots of N9K-C9504 / C9508 / C9516 chassis
• Bare System Controller Net Weight (without port dust plugs): Approximately 1.4 kg

3. Regulatory & Compliance Certifications

1. Safety Standards: UL 60950-1, CSA C22.2 No. 60950-1, EN 60950-1, IEC 60950-1, GB 4943 Chinese national safety standard
2. EMC & EMI Standards: FCC CFR Title 47 Part 15 Class A, VCCI Class A, EN55022 Class A, CISPR 22 Class A, ICES003 Class A
3. Carrier-Grade Compliance: NEBS Level 3 (GR-1089-CORE, GR-63-CORE), ETSI ETS 300 386-2, EN 50121-4 railway EMC compatibility
4. Environmental Directive: EU RoHS 6 hazardous substance restriction compliance, exempting BGA solder balls and press-fit connectors containing lead

4. Core Deployment Advantages

1. Dedicated Chassis-Wide Real-Time Hardware Telemetry Engine: The N9K-SC-A undertakes all heavy hardware monitoring workloads independently of supervisor modules, reducing supervisor CPU resource occupation caused by mass sensor data collection. It processes over 800 hardware metrics per second and delivers precise, low-latency chassis environmental and component health data for data center monitoring systems.
2. Sub-50ms Hitless Supervisor SSO Failover Support: The module provides dedicated low-latency synchronization links between active and standby supervisors with only 18μs inter-module sync latency, enabling ultra-fast stateful switchover without packet loss for mission-critical financial trading, AI computing and hyperscale cloud fabric environments that demand zero service interruption.
3. Predictive Hardware Fault Early Warning Mechanism: Built-in machine learning-based predictive fan and component failure analysis can identify hardware degradation signs weeks before complete component breakdown, allowing network operators to arrange planned maintenance and avoid unplanned fabric outages caused by sudden hardware faults.
4. Universal Compatibility Across All Nexus 9500 Chassis Hardware Generations: The N9K-SC-A is fully interoperable with all supervisor models (SUP-A / A+ / B / B+), all line card generations (-R / -R2 / EX / FX cloud-scale series) and all fabric/power/fan modules for Nexus 9504/9508/9516 chassis, supporting mixed-generation hardware chassis upgrade deployments without hardware replacement of the system controller.
5. Low Power Fanless Passive Cooling Carrier-Grade Reliability: With only 12W typical power consumption and a fanless passive heat sink design, the module eliminates mechanical fan failure risks and greatly reduces long-term operation energy consumption. Its 526,750-hour MTBF rating meets strict 24/7 non-stop carrier-grade data center continuous operation requirements.
6. Full Hot-Swap Zero-Downtime Maintenance Compatibility: The vertical hot-swappable form factor allows network administrators to replace faulty system controller modules without shutting down the entire chassis, avoiding costly large-scale data center fabric downtime during monitoring hardware maintenance and upgrades.
7. Dual NX-OS / ACI Fabric Operating Mode Unified Support: This system controller provides consistent chassis hardware monitoring and synchronization services for both traditional NX-OS IP leaf-spine fabrics and modern ACI multi-tenant policy-driven fabrics, supporting seamless fabric migration without additional monitoring hardware investment.

Supplementary Product Specification Notes

UNSPSC Classification Code

K9 Security Compliance Note

Factory Hardware Warranty Terms