Cisco PWR-C1-440WDC Full Official Product Description
1. Part Number & Naming Definition
Official Full Name
Cisco 440-Watt Hot-Swappable DC Input Power Supply Module (Config 1 Form Factor)
SKU:PWR-C1-440WDC
Naming Breakdown
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PWR: Modular power supply unit
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C1: Config 1 unified form factor built for Catalyst 3850 fixed switch chassis
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440W: Maximum rated DC output power of 440 Watts
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DC: Negative -48VDC telecom direct current input
Critical Note: Designed for carrier-grade -48V DC telecom power environments. AC and DC power supplies cannot be mixed in the same switch chassis. Interchangeable with spare variantPWR-C1-440WDC/2.
2. Core Architecture
The PWR-C1-440WDC is a hot‑swappable DC-DC switching power module equipped with integrated temperature-controlled variable-speed cooling fan. It accepts wide-range negative telecom DC input and converts to regulated -56 VDC output to power switch mainboard and PoE loads. It supports parallel 1+1 redundant deployment and automatic load sharing inside compatible switch chassis. Embedded protection circuits implement overvoltage (OVP), overcurrent (OCP), overtemperature (OTP) and short-circuit auto-recovery protection.
Deployment Guidance: Optimised for carrier, ISP and telco sites equipped with standard -48VDC plant power. Delivers power budget for IEEE 802.3af PoE endpoints, suitable for branch access deployments with moderate PoE requirements.
Core Product Positioning
The Cisco PWR-C1-440WDC is a field-replaceable hot-swappable DC power supply built for Catalyst 3850 access switches deployed in telco and service provider DC-powered sites. Suitable as primary or redundant power source for mid-density PoE switch deployments. Dual PSU configuration eliminates single point of failure and enables live hot-swap module replacement without switch power interruption. Widely implemented within carrier POP sites, service provider branch networks and enterprise locations utilising -48V DC power plants.
3. Hardware & Software Compatibility
Supported Host Platforms
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Cisco Catalyst 3850 Series fixed-port switches (all PoE and non-PoE variants)
Unsupported Platforms
C9200 / C9300 / C9300X, Catalyst 3650, Catalyst 9400/9500, Meraki MS series, ISR routers, ASA firewalls and all non‑C1‑config chassis. AC and DC power supplies cannot coexist within a single chassis.
4. Electrical & Physical Specifications
Electrical Ratings
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Input Voltage Range: -36 VDC minimum, -48 VDC nominal, -72 VDC maximum
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Input Current: Max 16 A @ -36 VDC; Max 8 A @ -72 VDC
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Input Interface: Screw terminal block for DC power wiring
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DC Output: -56 VDC, maximum 7.86 A (440 W)
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Minimum Hold-up Time: ≥ 2 ms at -48 VDC nominal input
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Cooling: Integrated temperature-controlled variable speed fan
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Protection: OVP, OCP, OTP, short-circuit automatic recovery
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Status Indicators: DC OK, PS OK LED indicators
Physical Specifications
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Dimensions (H × W × D): 40.1 × 82.6 × 309 mm (1.58 × 3.25 × 12.2 inch)
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Approximate Unit Weight: 1.2 kg (2.6 lb)
Environmental Specifications
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Operating Temperature: -5 °C ~ +45 °C
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Storage Temperature: -40 °C ~ +70 °C
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Operating Humidity: 5% – 95% non‑condensing
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Maximum Operating Altitude: 3048 m (10,000 ft)
5. Supported Functional Capabilities
Power System Functions
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Online Insertion and Removal (OIR) hot-swap capability
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Parallel 1+1 redundant power mode and dynamic load sharing
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Real-time PSU health monitoring via IOS-XE CLI and SNMP
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Dynamic fan speed adjustment based on internal ambient temperature
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Fault alert reporting for overheating, power loss and hardware faults
Platform Feature Compatibility
Supports StackPower power pooling function when installed within stacked Catalyst 3850 switch systems. Fully compatible with all native Layer 2 / Layer 3 switching functions of supported hardware.
6. Typical Deployment Scenarios
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Primary or redundant DC power supply for Catalyst 3850 PoE access switches at carrier POP and branch sites
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Service provider network infrastructure utilising standard -48VDC telecom power plants
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Mid-density PoE deployments supporting IEEE 802.3af IP phones and basic wireless access points
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Mission-critical carrier-grade environments requiring non-disruptive hot-swap power maintenance
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NEBS-compliant telco access layer deployments
7. Regulatory & Compliance Certifications
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Safety: UL 60950-1, IEC 60950-1, EN 60950-1
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EMC: CE, FCC Part 15 Class A, ICES-003 Class A
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Environmental: RoHS compliant
8. Standard Factory Package Contents
1 × Cisco PWR-C1-440WDC power supply module
Hardware installation documentation
DC power cables and lugs sold separately.
Model Comparison Reference
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PWR-C1-440WDC: Base 440W DC Config1 power supply
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PWR-C1-440WDC/2: Secondary commercial spare variant, electrically identical
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PWR-C1-715WDC / PWR-C1-715WDC/2: Higher capacity 715W DC power supplies
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PWR-C1-1100WDC series: High-capacity DC PSU for heavy PoE loads
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PWR-C1-350WAC / PWR-C1-715WAC series: Equivalent AC-input Config1 power modules
UNSPSC Classification Code
43211702 – Network equipment internal power supply module
Hardware Warranty
Genuine Cisco original hardware carries Cisco standard one-year hardware warranty. Refurbished units follow supplier warranty terms.
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