BT4025 - Type N & BNC Bias Tee, 10 - 3500 MHz, 3500 - 400 MHz, 1.5A

High Isolation, 10 MHz - 3500 MHz, 3500 - 4000 MHz N Type & BNC 50 Ohm

Previous Image
Next Image
Qty 1-9: $82.89
Qty 10-24: $73.71
Qty 25+: Please Inquire

USD icon click to view pricing Pop-up icon

Product Overview

  • Inject DC into RF Transmission Line
  • Extracts DC from RF transmission line
  • Low Insertion Loss (0.15 dB avg)
  • High RF to DC Isolation (65 dB avg)
  • Excellent VSWR (1.10 : 1 avg)
  • 100 VDC & 1.5 A max at DC port
  • Tri Alloy Type N Female (Jack) Low PIM
Insertion Loss VSWR DC Voltage DC Current RF-DC Isolation RF Input Power
10-3500 MHz 0.30 dB 1.20 : 1 100 V 1.5 A 40 dB 100W
3500-4000 MHz 0.35 dB 1.20 : 1 100 V 1.5 A 40 dB 100W

BT4025 Features & Benefits


BT4025 is a bias tee (also called a bias T) 3-port device with N Type and BNC jacks that is ideal for or injecting DC current into an RF transmission line. Covering all applications within the 10-4000 MHz ranges, this Bias T passes up to 1.5 Amps of DC current with excellent electrical performance.


The heart of the unit is a precision designed and etched microstrip circuit on a low-loss, high-frequency, dielectric substrate. Electrical performance is highlighted by 0.35 dB max insertion loss, 40 dB min RF-DC isolation, and 1.20:1 max VSWR. Narrow band RF performance over your frequency range may be even better. 100W max RF input power, 100V max DC voltage, and 1.5 Amp max DC current ensures optimal performance for all of your DC-injection requirements.


The BT4025's T-Style housing allows convenient coaxial cable access to all connector ports. Mechanical features include precision CNC, brass, 50 ohm Type N female coaxial connectors with tri allow plating to ensure tarnish resistance and low PIM operation. Connector pins are gold plated phospher bronze for reliability and low contact resistance.Virgin electrical grade PTFE support insulators captivate the contact pins enabling trouble free coaxial connector mating. Long term operation and superior shielding is assured by the rugged CNC machined aluminum housing with clear chemical film finish. Secure mounting is provided by two 0.125" dia (3.18 mm) through holes. RoHS construction includes no-lead solder and a finish free of hexavalent chromium.


Housing dimensions are 1.98" wide by 1.98" deep by 0.88" high (50.3 x 50.3 x 22.2 mm). The N Type female (jack) connectors extend 0.65" (16.3 mm) from the housing. Operating temperature range is from -65°C to +85°C. Weight is 160 grams. See N Type and BNC Bias T outline drawing for more information.


The BT4025 Type N female (jack) and BNC, 1.5 Amp, high isolation Bias Tee is ideal for a wide range of wireless radio frequency microwave applications where you must remotely insert DC current into an RF/microwave transmission line, often to power a low noise amplifier or active antenna. For more information on applications of an INSTOCK Wireless coaxial Bias Tee, please contact an INSTOCK Applications Engineer at 1-973-335-6550.

BT4025 - Bias T / Bias Tee Test Data

Close Test Data
Insertion Loss Test Sweep for BT4025
Insertion Loss Test Sweep for BT4025
Port-to-Port Isolation Test Sweep for BT4025
Port-to-Port Isolation Test Sweep for BT4025
Input Return Loss Test Sweep for BT4025
Input Return Loss Test Sweep for BT4025
Output Return Loss Test Sweep for BT4025
Output Return Loss Test Sweep for BT4025
Previous Image
Next Image

Request BT4025 STEP File

Close STEP Form
Back to Top