DDB-3J type pager lightning arresterDetailed product description：

The DDB-3J type pager lightning arrester can provide lightning protection and overvoltage protection for communication equipment, prevent high-frequency electromagnetic wave interference, and has the ability to improve equipment electromagnetic compatibility.

Industry of use: Small base station equipment in the communication industry (telecommunications pager base station);
Lightning protection for base station transmitter equipment and broadcasting room equipment in the broadcasting and television industry;
Lightning protection for petrochemical field equipment;
Lightning protection for power supply of financial institutions and various government equipment

Product features: sensitive response, high 1mA voltage sensitive (600V)
Residual voltage at the power output terminal (≤ 600V);
Fast response time and strong protection capability
L-N, L-PE, N-PE protection mode design.

The design of the DDB-3J type pager lightning arrester adopts a new concept of lightning protection, with the aim of protecting electrical equipment from lightning strikes, and particularly strengthening the protection of both ends of the phase and neutral lines. A discharge circuit consisting of eight sets of zinc oxide varistors and discharge tubes is formed with L-PE protection, a discharge circuit consisting of discharge tubes is formed with N-PE protection, and a voltage limiting and discharge circuit consisting of eight sets of zinc oxide varistors, iron core inductors, and capacitors is formed with L-N protection.
The DDB-3J type pager lightning protection overvoltage protection box has the characteristics of high 1mA pressure-sensitive voltage (600V), low residual voltage at the power output terminal (≤ 600V), fast response time, and strong protection capability. It is installed at the front end of the electrical equipment to ensure the normal operation of any electronic device under 8/20 μ s lightning waveform and 40kA simulated lightning impulse.
The DDB-3J type pager lightning protection overvoltage protection box is specially designed for pager base stations, with a power equipment capacity limit of 800 VA. Its technical performance indicators are shown in the attached table. If users have special requirements, our company can also produce according to their needs. This product has reliable quality, superior performance, low price, and easy installation and use. Simply connect the wires as shown in the diagram to use it. This product has been used by communication departments in various provinces and cities, with good feedback. Welcome to choose.

model	DDB-3J (single-phase)
Allowable working voltage	AC 220V±35%
Lightning arrester model	20621 and R500W05
8/20 μ s rated current (KA)	forty
8/20 μ s maximum flow rate (KA)	sixty
Residual voltage between phase and neutral lines under rated flow rate of 8/20 μ s	< 600V
Voltage drop under rated load	< 4V
The ability to suppress high-frequency electromagnetic waves	The cut-off frequency of the low-pass filter inside the box is ≤ 2000 Hz
insulation resistance	＞2MΩ
pressure rating	AC 1500V； 1min
equipment capacity	800VA
Overall dimensions	155×115×90