Citel DS440-400 SPD, compact, type, 3-phase, type 2, 400VAC, 20kA

Product Overview

The DS440-400 is a compact Type 2 AC surge protector designed to protect 3-phase+Neutral networks at the main switchboard level in 230/400V applications. This modular SPD features high-energy metal oxide varistor (MOV) technology with integrated thermal disconnectors and failure indicators, providing common mode protection with pluggable modules and a fixed base for easy and fast maintenance in industrial and commercial electrical distribution systems.

Key Features:

• Compact Modular Design: Pluggable module with fixed base configuration for rapid maintenance and replacement without complete system shutdown
• High Energy MOV Technology: Metal oxide varistor-based protection optimized for 230/400V three-phase networks
• Thermal Disconnection: Integrated thermal disconnectors with visual failure indicators for standards compliance
• High Discharge Capacity: Nominal discharge current of 20kA with maximum discharge current of 40kA per pole (8/20μs)
• Common Mode Protection: Provides surge protection between live conductors and ground
• TOV Performance: Withstands temporary overvoltage of 580V for 5 seconds and 770V for 120 minutes without disconnection
• Remote Signaling Option: Optional DS440S-400 version available with changeover contact for remote status monitoring
• Easy Installation: DIN rail compatible with screw terminal connections for flexible mounting
• Visual Status Indicator: Built-in failure indicator for quick assessment of protection status

Technical Specifications:

• Article Number: DS440-400 (Part Number 311402)
• Protection Type: Type 2 AC surge protector
• Configuration: 3-phase+Neutral (4-pole)
• Network Voltage: 230/400V AC
• Max. AC Operating Voltage: 440Vac
• Nominal Discharge Current (In): 20kA (8/20μs)
• Max. Discharge Current (Imax): 40kA (8/20μs)
• Temporary Overvoltage: 580Vac for 5 seconds, 770Vac for 120 minutes
• Connection Type: Screw terminals, 1.5-10mm² (L/N), 2.5-25mm² (PE)
• Mounting: DIN Rail compatible
• Operating Temperature: -40°C to +85°C
• Protection Mode: Common mode

Compatible Accessories:

• Remote Signaling Version: DS440S-400 (with changeover contact output)
• Voltage Variants: DS440-280 (280Vac max), DS440-320 (320Vac max)
• Enhanced Protection: DS440-280/G (common/differential mode), DS440-230/G (MOV+GDT technology)
• Alternative Configurations: DS440-280/G/ENZ (PE terminal at top configuration)
• Updated Model: DAC40C-40-440 (latest innovation with enhanced features)

Compliance & Certifications:

• International Standards: IEC 61643-11, EN 61643-11
• North American Standards: UL1449 Edition 5
• International Certification: EAC (Eurasian Conformity)
• Environmental: RoHS compliant

Applications:

Essential for main switchboard protection in commercial buildings, industrial facilities, data centers, telecommunications installations, manufacturing plants, hospitals, office complexes, retail centers, educational institutions, warehouses, and any 230/400V three-phase electrical distribution system requiring Type 2 surge protection against lightning-induced surges, switching transients, and temporary overvoltages at the main distribution panel level where fast maintenance capability and reliable common mode protection are critical requirements.