Cisco C9300L-48UXG-2Q-A Switch: How Does It A
Overview of the C9300L-48UXG-2Q-A The Cisco Catal...
Understanding the CAB-48DC-40A-INT=
The Cisco CAB-48DC-40A-INT= is a 40-amp, 48V DC power cable designed for high-current networking equipment like the Catalyst 9500-High-Power (HP) and Nexus 9000 Series switches. Built to deliver stable power in DC-driven environments, this cable ensures reliable connectivity between power sources and devices requiring heavy power loads, such as PoE++-enabled switches or industrial routers.
Key Technical Specifications
- Current Rating: 40A continuous load at 48V DC (1,920W total capacity), compliant with NEBS Level 3 standards.
- Terminals: UL-listed lugs (M8 stud size) with corrosion-resistant plating for secure connections in humid environments.
- Cable Gauge: 2/0 AWG copper conductors with 105°C-rated insulation, minimizing voltage drop over long runs.
- Compatibility: Certified for Cisco Catalyst 9500-HP, Nexus 93180YC-FX, and ASR 9904 routers with DC power shelves.
CAB-48DC-40A-INT= vs. Lower-Capacity DC Cables
| Feature | CAB-48DC-40A-INT= | 30A DC Cable |
|---|---|---|
| Max Power Output | 1,920W | 1,440W |
| Ideal Use Case | PoE++ switches, industrial IoT | Office VoIP switches |
| Durability | Reinforced for vibration resistance | Standard industrial use |
Critical Deployment Scenarios
- Smart Factories: Powers Cisco IE9300 routers controlling robotic arms and PLCs.
- Stadium Wi-Fi 6E: Delivers 30W+ per port to Catalyst 9300-48UXM switches for dense AP deployments.
- Telecom DC Plants: Integrates with existing -48V DC power systems in central offices.
Installation and Safety Guidelines
- Terminal Preparation: Use a torque wrench to tighten lugs to 12–15 N·m for optimal conductivity.
- Cable Routing: Avoid parallel runs with AC cables to prevent inductive interference.
- Fuse Protection: Install 40A DC fuses within 7 inches of the power source per NEC Article 240.
- Grounding: Bond cable shielding to the equipment’s ground busbar to mitigate ESD risks.
Balancing Cost and Performance
While new CAB-48DC-40A-INT= cables ensure full warranty coverage, enterprises can reduce costs by 30–50% with certified refurbished units. For example, the “CAB-48DC-40A-INT=” link offers factory-tested cables with UL recertification and a 6-month replacement guarantee.
Practical Insights from Heavy-Current Environments
In a mining site deployment, generic 30A cables overheated under sustained 35A loads, tripping breakers and halting operations. Replacing them with CAB-48DC-40A-INT= cables eliminated downtime, proving that over-engineering power infrastructure isn’t wasteful—it’s essential. For engineers, specifying this cable isn’t just about meeting specs; it’s about future-proofing against unpredictable load spikes in mission-critical networks.