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DC Block Inner 250-2700MHz 500W/3kV
Type Nm-f



  • Multi-Band Coverage
  • 500 W Avg. Power Rating
  • 3 kV High Voltage Rating
  • Minimal RF Insertion Loss
  • Very Low Passive IM
  • RoHS compliant
  • High Reliability
  • N or 7-16 mm DIN connectors

Product Description

The Microlab HR-20 series DC Blocks are used to prevent the flow of direct current and low frequency current surges along the inner conductor of a transmission line, while permitting the unimpeded flow of RF signals. Applications include the blocking of current surges in subway tunnels, at antenna sites during lightning storms and to route DC to tower mounted amplifiers.
The unit consists of a length of coaxial line with a distributed series capacitor in the center conductor to block the flow of DC and low frequencies, while passing RF with negligible loss or reflections.


Download Datasheet
  Band 1: 380–800 MHz
  Band 2: 800-2700 MHz
Power: 500W
  Band 1: 1.30:1
  Band 2: 1.20:1
Insertion Loss:  
  Band 1: <0.12
  Band 2: <0.08
PIM: -164 dBc typical, <-160 dBc guarantee
(2 tones at +43 dBm)
Connectors: N type/6 Nm, 4.4 f-p
Ingress Protection: IP64