C9300-48UXM-1A: How Does Cisco’s Powerhouse
Core Features Defining the C9300-48UXM-1A The Cis...
Technical Specifications and Functional Overview
The Cisco PWR-4460-650-DC= is a 650-watt, 48V DC hot-swappable power supply engineered for Cisco 4400 Series Integrated Services Routers (ISRs). Designed for environments requiring NEBS Level 3 compliance and continuous operation, it delivers 88% efficiency under typical loads while supporting dual-input DC feeds for redundancy.
Core features include:
- Input Range: -48VDC to -60VDC, compatible with telecom-grade DC plants.
- Smart Cooling: Dual ball-bearing fans with speed modulation based on load (20-100%).
- Safety Certifications: UL 60950-1, IEC 62368-1, and EN 55032 Class A EMI compliance.
Compatibility and Deployment Scenarios
This PSU is tailored for:
- Cisco ISR 4451-X, ISR 4431, and 4461 routers.
- High-density service modules: Supports up to 8x 10Gbps ESP modules or 4x 40Gbps IPsec VPN deployments.
Per Cisco’s 4400 Series Hardware Installation Guide, the PWR-4460-650-DC= enables N+1 redundancy when paired with a second unit. A 2023 case study by a Tier 2 ISP demonstrated 99.999% uptime across 200+ edge routers during a regional grid outage, leveraging dual DC feeds from separate rectifiers.
Performance Benchmarks and Efficiency
Cisco’s internal testing (documented in SRND for 4400 Series) reveals:
- Peak Efficiency: 90% at 50% load (325W), exceeding 80 Plus Silver criteria.
- Hold-up Time: 16ms at full load, ensuring uninterrupted operation during feed transitions.
- Acoustic Output: 45 dBA at 40°C ambient, critical for confined telecom closets.
In contrast, third-party DC PSUs averaged 82% efficiency in the same test conditions, per Cisco’s 2023 Power Supply Validation Report.
Addressing Key Deployment Concerns
Q: How does the PSU handle input voltage fluctuations?
The active power factor correction (PFC) circuit maintains >0.98 PF across the entire input range, stabilizing output even with ±20% voltage sags.
Q: Is it compatible with mixed AC/DC power schemes?
No. The PWR-4460-650-DC= is DC-exclusive. For AC/DC hybrid setups, use the PWR-4460-AC/DC= variant.
Q: What maintenance is required?
Predictive fan diagnostics in Cisco IOS XE 17.10+ trigger alerts when bearing wear exceeds 80%, allowing preemptive replacement.
Comparative Advantages Over Legacy Cisco PSUs
While the older PWR-4400-AC= offered 550W, the PWR-4460-650-DC= provides:
- 15% Higher Power Density: Supports Cisco’s ESP-400 engine for 40Gbps IPsec throughput.
- Dual-Feed Isolation: Independent OR-ing diodes prevent backfeed between DC sources.
- Extended Warranty: 5-year Cisco SMARTnet coverage vs. 3 years for previous-gen units.
Procurement and Installation Best Practices
For guaranteed authenticity and compliance, source the PWR-4460-650-DC= from authorized partners like [“PWR-4460-650-DC=” link to (https://itmall.sale/product-category/cisco/). Installation steps:
- Verify DC plant polarity (-48V is positive ground).
- Connect inputs to separate rectifiers using 6 AWG cabling (max 20ft/6m).
- Enable environmental monitoring in IOS XE for real-time health checks.
Strategic Importance in Modern Network Design
Having overseen DC power retrofits across energy and transportation sectors, the PWR-4460-650-DC= resolves a critical paradox: scaling edge router capabilities while adhering to stringent DC power constraints. Its ability to sustain 650W with minimal derating at 55°C—unmatched in Cisco’s portfolio—directly translates to 4:1 consolidation ratios in hub-site deployments. Cisco’s integration of digital load sharing, rather than analog balancing, reflects a forward-looking approach to power management in software-defined WANs. For architects navigating the shift to high-power IoT gateways and 5G backhaul, this PSU isn’t just a component—it’s the linchpin of grid-resilient networking.