N series connectors are a kind of low to medium power connector with screw couping style. They are widely used for connection with coax in radio communication equipments and instructions.
They also can be interchangeable with the same type connectors internationally.Their characteristics impedance are 50 Ohms and 75 Ohms.

N-K5/4 CONNECTOR MAJOR TECHNICAL CHARACTERISTICS:

Temperature Range:  -55~+155

Vibration : 105M/S2 (10~500 Hz)  

Frequency Range: 0~11GHz

Working Voltage:At sea level ≤1400v(rms)

Center conductor withdrawal force    ≥0.56N

 Contact Resistance:
        Center Contact    ≤ 1 Meg Ohms
        Outer Contact      ≤ 1 Meg Ohms

Insulation  Resistance:   ≥5000Meg Ohms

Withstand voltage

         At sea level:2500V(rms)

         At 5.4 Kpa:400V
VSWR: Straight: ~2GHz≤1.10   2~11GHz ≤1.30 

            Right Angle: (~2GHz)≤1.15  (2~11GHz) ≤1.35

Durability:  500cycles

Sheltered effectiveness:90dB min At 1GHz