Citel DAC50S-31-440 SPD, type 2, 3P+N, 440VAC, 20kA

Product Overview

The DAC50S-31-440 is a Type 2 AC surge protector with integrated remote signaling designed for main switchboard protection of 3-phase+Neutral networks in 230/400V applications. This advanced pluggable SPD features hybrid MOV+GDT technology providing both common mode and differential mode protection with 50kA discharge capacity, thermal disconnectors, visual status indicators per pole, and changeover contact remote signaling for comprehensive system monitoring.

Key Features:

• Hybrid MOV+GDT Technology: Combines metal oxide varistor and gas discharge tube for enhanced surge suppression with zero residual current
• Dual Mode Protection: Provides both common mode (L-PE, N-PE) and differential mode (L-N) protection
• Integrated Remote Signaling: Built-in changeover contact output (250V/0.5A AC, 30V/3A DC) for remote status monitoring
• High Discharge Capacity: 20kA nominal discharge current with 50kA maximum discharge per pole (8/20μs)
• Visual Status Indicators: Mechanical red/green indicator per pole for easy visual inspection
• Modular Pluggable Design: Individual plug-in modules for each phase allowing easy maintenance without system shutdown
• Enhanced TOV Performance: 580Vac withstand, 770Vac disconnection, 1200V/300A/200ms withstand capability
• High Short-Circuit Rating: 50,000A short-circuit current withstand capability

Technical Specifications:

• Article Number: DAC50S-31-440 (Part Number 821110444)
• Protection Type: Type 2 AC surge protector
• Configuration: 3-phase+Neutral (4-pole)
• Network: 230/400V 3-phase+N
• AC System: TT-TNS
• Max. AC Operating Voltage: 440Vac
• Nominal Discharge Current (In): 20kA (8/20μs)
• Max. Discharge Current (Imax): 50kA per pole (8/20μs)
• Protection Levels: 2kV (L-N mode), 1.5kV (N-PE mode)
• Residual Current: None (zero leakage)
• Short-Circuit Current Rating: 50,000A
• Remote Contact Rating: 250V/0.5A (AC), 30V/3A (DC), 1.5mm² max
• Connection: Screw terminals, 2.5-25mm²
• Mounting: DIN Rail 35mm (EN 60715), 4TE width (EN43880)
• Material: Thermoplastic UL94 V-0
• Operating Temperature: -40°C to +85°C
• Environmental Rating: IP20

Compatible Accessories:

• Replacement Modules: MDAC50-440 + MDACG-440
• Voltage Variants: DAC50S-31-275 (275Vac), DAC50S-31-320 (320Vac)
• Single-Phase Configuration: DAC50S-11-440 (single-phase with remote signaling)
• 3-Phase Configuration: DAC50S-30-440 (3-phase without neutral)
• Common Mode Only: DAC50S-40-440 (common mode protection)

Compliance & Certifications:

• Standards: IEC 61643-11, EN 61643-11, UL1449 Edition 5
• Certifications: UL certified
• Fuse Requirements: Type gG, 50A min - 125A max (Type 'S' or delayed)
• Environmental: RoHS compliant

Applications:

Essential for primary surge protection with remote monitoring in three-phase main switchboards of commercial buildings, industrial facilities, manufacturing plants, data centers, telecommunications installations, critical infrastructure, building management systems, and any 230/400V three-phase+Neutral electrical distribution system requiring Type 2 protection with both common and differential mode capabilities, integrated remote status signaling for facility management integration, high discharge capacity, modular plug-in design for easy maintenance, and visual per-pole status indication for comprehensive electrical system protection and monitoring.