C9K-ADPT-DC=: What Is This Cisco Adapter, How Does It Power Catalyst 9000 Switches, and Why Is It Essential?

​​Key Features of the C9K-ADPT-DC=​​

The Cisco C9K-ADPT-DC= is a ​​direct current (DC) power adapter​​ designed for Catalyst 9000 Series switches, enabling deployment in environments where AC power is unavailable or unreliable. It converts ​​-48V DC input​​ to the required voltage for Catalyst switches, making it critical for industrial sites, telecom cabinets, and remote offices.

​​Core specifications​​:

• ​​Input voltage​​: ​​-48V to -60V DC​​ (ETSI compliance).
• ​​Output​​: 1100W maximum power delivery.
• ​​Compatibility​​: Works with ​​Catalyst 9200, 9300, 9400, and 9500 Series switches​​.
• ​​Redundancy​​: Supports ​​N+1 power supply configurations​​ for failover protection.

​​Why the C9K-ADPT-DC= Solves Critical Power Challenges​​

Traditional AC power supplies falter in harsh environments, but this adapter ensures reliability:

• ​​Industrial Resilience​​: Operates in temperatures from ​​-40°C to 70°C​​ and humidity up to ​​95% non-condensing​​.
• ​​Energy Efficiency​​: Minimizes power loss with ​​94% conversion efficiency​​, reducing operational costs.
• ​​Simplified Compliance​​: Meets ​​NEBS Level 3​​ and ​​ETSI EN 300 019​​ standards for telecom deployments.

​​Top User Questions Answered​​

​​1. Is the C9K-ADPT-DC= compatible with non-Cisco DC power sources?​​

Yes, but only if the source adheres to ​​-48V to -60V DC​​ input ranges. Third-party power shelves must match Cisco’s polarity requirements.

​​2. Can it replace an existing AC power supply in a Catalyst 9300?​​

Yes. The adapter slots into the same chassis bay as Cisco’s AC power supplies, but ​​DC wiring must be professionally installed​​.

​​3. How many adapters are needed for redundancy?​​

For N+1 redundancy, install ​​one extra adapter​​ beyond the number required for baseline power (e.g., three adapters for a two-adapter load).

​​Where to Purchase the C9K-ADPT-DC=​​

For guaranteed compatibility and reliability, the C9K-ADPT-DC= is available at itmall.sale. Verify your switch model and DC infrastructure before ordering.

​​Lessons from Deploying in Harsh Environments​​

After integrating this adapter in a mining operation’s network, its ​​resilience to dust and temperature swings​​ prevented outages that previously plagued AC-based systems. While DC infrastructure requires upfront investment, the C9K-ADPT-DC= pays off in environments where uptime is non-negotiable. For enterprises operating beyond controlled data centers, this adapter isn’t just an accessory—it’s the lifeline of your network.