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500 MHz Passive Probes

P6139B and P5050B Datasheet

The P6139B and P5050B probes are high bandwidth, high impedance 10X passive voltage probes with 10 MΩ input resistance. These probes feature a small probe head and sharp tip that makes it easier to probe dense circuitry. The P6139B and P5050B share similar electrical specifications but support Tektronix oscilloscopes with different compensation ranges. Visit the Oscilloscope Probe & Accessory Selector Tool located at to ensure the correct probe is selected for your oscilloscope.

Key performance specifications

  • 500 MHz probe bandwidth
  • Large input impedance at the probe tip (10 MΩ, 8pF)
  • 10X attenuation factor
  • 300 v CAT II input voltage

Ease-of-use features

  • Compact probe head for probing small geometry circuit elements
  • Small probe body for enhanced visibility to the Device-Under-Test
  • Replaceable probe tip cartridges
  • Large accessory set for versatile connectivity


  • P6139B and P5050B feature the TekProbe interface for direct BNC connection for oscilloscopes with 1 MΩ inputs.
  • Integrated oscilloscope and probe measurement systems feature intelligent communication that automatically scales and adjusts units on the oscilloscope display.


  • Low power devices
  • Service
  • Manufacturing engineering
  • Test research and development


All specifications are guaranteed unless noted otherwise. All specifications apply to all models unless noted otherwise.

Model overview

SpecificationP6139B P5050B
Attenuation 10X 10X
Dynamic range 300 V CAT II 300 V CAT II
Bandwidth 500 MHz 500 MHz
Input impedance at the probe tip 10 MΩ, 8 pF 10 MΩ, 11 pF
Compensation range 8 pF to 18 pF 16 pF to 22 pF
Cable length 1.3 m 1.3 m

Environmental specifications

Operating Comp box: –15 °C (+5 °F) to +50 °C (+122 °F)
Probe body: –55 °C (–67 °F) to +65 °C (+149 °F)
Nonoperating –62 °C to +85 °C (–80 °F to +185 °F)
OperatingComp box: Up to 95% relative humidity (%RH) up to +30 °C, up to 75% RH and up to +50 °C. Noncondensing
Probe body and cable: Up to 95% relative humidity (%RH) up to +30 °C, up to 85% RH and up to +65 °C. Noncondensing
Nonoperating Up to 85% relative humidity and up to +85 °C. Noncondensing
Operating3.0 km (10,000 ft) maximum
Nonoperating15 km (50,000 ft) maximum

Ordering information


500 MHz general purpose passive probe with TekProbe I interface
500 MHz general purpose passive probe with TekProbe I interface

Standard accessories

Description Quantity included Reorder part number
Long ground spring 2 016-2028-xx
6" alligator ground lead 1 196-3521-xx
Standard hook tip 1 013-0362-xx
Universal IC cap, 3.8 mm 1 013-0366-xx
Marker band set, 2 each of 5 colors 1 016-0633-xx
Adjustment tool 1 003-1433-xx
Manual (English only) 1 071-2710-xx

Recommended accessories

Description Quantity included Reorder part number
Short ground spring 2 016-2034-xx
12” alligator ground lead 1 196-3512-xx
6” clip-on ground lead 1 196-3198-xx
Micro hook tip 1 013-0363-xx
MicroCKT test tip 1 206-0569-xx
BNC to probe tip adapter; unterminated 1 013-0367-xx
PCB to probe tip adapter 10 016-2016-xx
Compact probe tip chassis mount test jack 1 131-8831-xx
P6139B replacement tip 1 206-0635-xx
P5050B replacement tip 1 206-0636-xx