C9K-PWR-CAB-AC-BL=: Why Is This Cisco Power C
Core Design and Compatibility The C9K...
Technical Architecture & Operational Innovations
The Cisco DS-CAC-1200W= redefines power delivery for mission-critical network environments, combining enterprise-grade reliability with hyperscale efficiency. Designed for Cisco UCS C-Series servers and Nexus 9500 switches, this hot-swappable AC power module incorporates three groundbreaking technologies:
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Triple-Phase Active PFC (Power Factor Correction)
Utilizing silicon carbide (SiC) MOSFETs and adaptive phase balancing, it achieves 0.99 power factor across 90-305VAC input ranges. This reduces harmonic distortion to <3% THD, outperforming traditional single-phase PSUs by 47% in mixed-load scenarios. -
Dynamic Load Sharing
Four parallel 300W power stages with N+1 redundancy enable 94.5% peak efficiency at 20-100% load. The module automatically redistributes current during grid fluctuations, sustaining 1200W output even if one stage fails. -
Intelligent Thermal Management
Dual counter-rotating fans with PWM control adjust cooling based on ASIC temperature telemetry. In Cisco’s 2024 stress tests, this design maintained 58°C component temps at full load in 45°C ambient environments – 22°C cooler than industry averages.
Performance Benchmarks vs Legacy Power Systems
| Parameter | DS-CAC-1200W= | PSU-920W (Previous Gen) |
|---|---|---|
| Efficiency at 50% Load | 94% (Platinum) | 89% (Gold) |
| Hold-Up Time (230VAC) | 20ms | 12ms |
| Input Voltage Range | 90-305VAC | 100-240VAC |
| MTBF (40°C Ambient) | 1.8M hours | 750K hours |
| Hot-Swap Recovery | <0.5 sec | 2.1 sec |
Cisco’s validation data shows 38% lower TCO over 7-year operational cycles compared to 920W predecessors, driven by reduced cooling costs and extended hardware lifespan.
Deployment Scenarios & Operational Insights
1. AI/ML Compute Clusters
In NVIDIA DGX H100 deployments, the DS-CAC-1200W= sustains 1050W continuous load per GPU tray with <1% voltage deviation during transient spikes. Its IEC 61000-4-5 Level 4 surge protection (6kV/3kA) ensures uninterrupted operation during substation switching events.
2. Edge Micro-Data Centers
When paired with Cisco UCS E-Series servers, the module operates reliably from -40°C to +70°C ambient temperatures. Field data from telecom 5G sites shows 99.999% uptime despite 98% humidity and frequent 10G vibration loads.
Addressing Critical Infrastructure Concerns
Q: How does it handle brownout conditions?
The module’s holdup capacitor bank provides 20ms of backup power at 230VAC – sufficient for RAID controllers to complete in-flight writes during grid dips.
Q: What certifications apply for industrial use?
Compliant with UL 62368-1 3rd Edition, EN 55032 Class A EMI, and MIL-STD-810H for shock/vibration resistance.
Q: Compatibility with third-party PDUs?
Validated with Schneider APC Smart-UPS and Vertiv Geist units through Cisco’s Multi-Vendor Power Certification Program.
For organizations optimizing power infrastructure, explore DS-CAC-1200W= availability at itmall.sale’s Cisco portfolio.
Engineering Perspective
The DS-CAC-1200W= exemplifies Cisco’s philosophy of “invisible infrastructure” – components so reliable they fade into operational background. While competitors chase higher wattage ratings, this module’s genius lies in predictive load orchestration, dynamically balancing efficiency and resilience. As rack power densities approach 30kW, its ability to maintain sub-1% voltage ripple under 500A/m² EMI fields positions it as the silent guardian of next-gen compute. Those prioritizing upfront cost over electrical precision risk cascading failures; in mission-critical environments, voltage stability isn’t a feature – it’s the foundation.