Lifetime Connectivity

DC-BLOCK-3-NMF-1
DC Block

Rev : B | Rev date : 15 Nov 2025
This DC Block is used to prevent the flow of direct current and low frequency current surges along the inner and outer conductors of a transmission line, while permitting the unimpeded flow of RF signals. Applications include the blocking of current surges in subway tunnels. The unit consists of a length of coaxial line with a series capacitor in both the center conductor and outer conductor to block the flow of low frequencies, while passing RF with negligible loss or reflections.

Feature / Benefits

• Multi-Band Frequency Range
• 3 kV High Voltage Rating
• Minimal RF Insertion Loss
• Very Low Passive IM
• RoHS Compliant
• High Reliability
• N male/female connector

General Specifications
Product Type DC Block
Electrical Specifications
Frequency Range 80 - 3800
Impedance 50 Ohm
Value of insertion loss Lower Frequency Upper Frequency
0.25 80 3800
VSWRMAX ReturnLossDB LowerFrequency UpperFrequency
1.4 15.5 80 100
1.3 17.7 100 300
1.1 26.4 300 1880
1.2 20.8 1880 2700
1.25 19 2700 3800
Intermodulation (IM3) 155dBc, typ -160dBc (2x20W)
Max. DC Blocking Voltage 3 KV
Mechanical Specifications
Input Connector Type N male
Output Connector Type N female
Temperature Specifications
Temperature Range -40°C to 55°C (-40°F to 131°F)
Testing and Environmental
Environmental Class IP67 per EN60529

WINS Value Proposition

Value Propositions