EFB Elektronik 1DA Fine Protection with FailSafe Ub=12V DP1LSA-12FS-PTC

The EFB Elektronik 1DA Fine Protection with FailSafe is a high-quality data line surge arrester designed to protect sensitive equipment connected to data and signal lines. With a nominal operating voltage of 12 V DC and integrated PTC overcurrent protection, this device ensures reliable protection against transient overvoltages and overcurrents. The FailSafe function automatically disconnects the protected circuit in case of overload, preventing damage to downstream devices. Suitable for DIN rail or surface mounting, it is ideal for use in CCTV, access control, and industrial automation systems.

Advantages

• Reliable protection against surges and overcurrents
• FailSafe function for automatic disconnection
• Resettable PTC overcurrent protection
• Compact design for easy installation on DIN rail or surface
• Compliant with IEC 61643-21 and EN 61643-21 standards

Suitable for

• Data lines and signal lines in building automation
• CCTV systems and access control installations
• Industrial control and measurement systems
• Telecommunication and network equipment

Key specifications

• Product Type: Data Line Surge Arrester
• Number of Protected Pairs: 1
• Nominal Operating Voltage (Ub): 12 V DC
• Max. Continuous Operating Voltage (Uc): 15 V DC
• Nominal Discharge Current (In) (8/20 µs): 1 kA
• Max. Discharge Current (Imax) (8/20 µs): 2 kA
• Voltage Protection Level (Up) (Line-Line): < 30 V
• Voltage Protection Level (Up) (Line-Ground): < 600 V
• Response Time: < 1 ns
• Protection Mode: Line-Line, Line-Ground
• FailSafe Function: Yes (Automatic Disconnection)
• Overcurrent Protection: Yes (PTC, Resettable)
• Connection Type: Screw Terminals
• Mounting Type: DIN Rail (35mm), Surface Mount
• Housing Material: PA (Polyamide)
• Operating Temperature Range: -40 °C to +80 °C
• Standards: IEC 61643-21, EN 61643-21

Recommendations

For optimal protection, install this surge arrester as close as possible to the equipment to be protected. Ensure proper grounding according to local regulations. The integrated PTC provides resettable overcurrent protection, reducing maintenance costs.