Citel DLA2-12D3 SPD, data, 2-pair, Din rail, plug-in, 12V, 5kA

Product Overview

The DLA2-12D3 is a two-pair DIN rail plug-in data line surge protector designed for RS232 and RS485 telecommunication and I&C systems. Utilizing hybrid GDT and TVS diode technology, this device provides 20 kA maximum discharge capacity with 5 kA nominal current while supporting transmission rates up to 10 Mbit/s on 12V systems. The pluggable modular design with shield protection ensures uninterrupted signal transmission during maintenance operations.

Key Features:

• Hybrid Protection Technology: Gas discharge tube combined with fast-switching TVS diodes delivers high discharge capacity and rapid response for comprehensive surge defense.
• Two-Pair Protection: Protects two complete data pairs plus shield connection, with shield earthed via dedicated gas discharge tube for enhanced common-mode protection.
• Pluggable Module Design: Removable protection module enables field replacement without signal interruption, ensuring continuous operation during maintenance.
• High Discharge Capacity: 20 kA maximum and 5 kA nominal discharge current provides robust protection against lightning effects and switching surges.
• Broadband Performance: Supports transmission rates up to 10 Mbit/s with bandwidth exceeding 115 MHz for high-speed data applications.
• Low Insertion Loss: 4.7 ohm line resistance and optimized circuit design maintain signal integrity across RS232 and RS485 protocols.
• Rail Grounding: Convenient earthing connection through standard 35mm DIN rail simplifies installation and ensures reliable ground path.
• Short-Circuit Protection: Transmission interrupt failsafe mode (default mode 2) provides automatic line isolation during catastrophic protection element failure.

Technical Specifications:

• Article Number: 640211
• Application: RS232, RS485 data lines
• Technology: Gas Discharge Tube (GDT) + TVS diode
• Configuration: 2-pair + shielded
• Rated Voltage: 12 VDC
• Maximum Operating Voltage: 15 VDC
• Maximum Discharge Current (Imax): 20 kA (8/20 µs)
• Nominal Discharge Current (In): 5 kA (8/20 µs)
• Maximum Continuous Current: 300 mA
• Voltage Protection Level (Up): 30 V
• Response Voltage: 20 V
• Line Resistance: 4.7 ohm
• Bandwidth: >115 MHz (>50 MHz typical)
• Transmission Rate: Up to 10 Mbit/s
• Connection: Screw terminals 0.5-2.5mm²
• Mounting: Plug-in DIN box, symmetrical rail 35mm (EN 60715)
• Housing: Thermoplastic UL94 V-0
• Operating Temperature: -40°C to +85°C
• Enclosure Rating: IP20
• Failsafe Mode: Short-circuit, transmission interrupt (default mode 2)

Compliance & Certifications:

• IEC 61643-21 / EN 61643-21 certified
• UL497B compliant
• UL Listed

Applications:

This data line surge protector is designed for RS232 and RS485 serial communication systems, industrial control and instrumentation networks, building automation systems, SCADA installations, PLC communication links, motor control circuits, security and access control systems, HVAC control networks, remote monitoring equipment, process control instrumentation, telecommunications infrastructure, and any data transmission application operating at 6-170V with transmission rates up to 10 Mbit/s requiring robust surge protection with field-replaceable modules and uninterrupted signal transmission during maintenance in industrial and commercial environments.