The NX5 bs-3-690-200.3 from em test is a Coupling Decoupling Network with Frequency 50 to 60 Hz, Operating Voltage 85 to 264 VAC, Burst Voltage 5.5 kV, Surge Voltage 5 kV, Operating Current 100 mA. More details for NX5 bs-3-690-200.3 can be seen below.