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K251/V251 bias tee

Ultra-Wideband Bias Tees


These ultra-wide bandwidth bias tees have been optimized for optical communications and other high-speed pulse, data or microwave applications. Designed to simultaneously apply both DC and RF drive signals to a device via a single input port, these bias tees feature fast rise times, excellent low frequency response, minimum insertion loss and flat group delay. Precision K Connector® and V Connector® interfaces assure excellent impedance match across the wide band-widths available. A one year warranty is provided.

  • Ideal for Optical Communications Applications
  • Low Insertion Loss
  • Risetime: <5 ps (V251), <7 ps (K251)




 Frequency Range 3dB BW

 50 KHz to 40 GHz

100 KHz to 65 GHz 

 Insertion Loss

<2 dB typical 

<2.5 dB typical 

 Rise Time

 < 7 ps typical

< 5 ps typical 

 Group Delay

110 ± 2 ps typical 

113 ± 2 ps typical 

 Max DC Current

100 mA 

 100 mA

 Max DC Voltage



 Max RF Power

 1 W

1 W 


RF In: K(m)
RF Out: K(f)
Bias: SMC (m)

RF In: V(m)
RF Out: V(f)
Bias: SMC(m) 

Specifications apply over the full DC Bias range and over the temperature range of 0°C to +70°C.