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Peak Atlas DCA75 PRO Semiconductor Tester

Peak Electronics

  • $ 15795


Building on the continued success of our existing component identification and analysis instruments, the DCA75 brings an array of exciting new features for the hobbyist and professional alike. The DCA75 is an advanced new design that features a graphics display, USB communications, PC Software (Latest firmware R0019and an enhanced component identification library.

The DCA75 supports all the components that the popular Peak Atlas DCA55 supports, but adds plenty more. Components supported include:

  • Transistors (including Darlingtons), Silicon and Germanium types. Measures gain, Vbe and leakage.
  • MOSFETs, enhancement mode and depletion mode types. Measure on-threshold (at 5mA) and approx transconductance (for span of 3mA-5mA).
  • JFETs, including normally off SiC types. Measures pinch-off voltage (at 1uA) and approx transconductance (for span of 3mA-5mA).
  • IGBTs (insulated gate bipolar transistors). Measures on-threshold (at 5mA).
  • Diodes and Diode networks.
  • LEDs and bicolour LEDs (2 lead and 3 lead types).
  • Zener Diodes with measurement of zener voltage up to 9V at 5mA.
  • Voltage regulators (measures regulation voltage, drop-out voltage, quiescent current).
  • Triacs and Thyristors that require less than 10mA of gate current and holding current.

Stand-alone or with a PC     

The instrument can be used stand-alone or connected to a PC. Either way, the DCA Pro will automatically identify the component type, identify the pinout and also measure a range of component parameters such as transistor gain, leakage, MOSFET and IGBT threshold voltages, pn characteristics and much more.

Curve Tracing

When connected to a PC using the supplied USB cable, a range of low current curve-tracing functions can be performed. Various graph types are available, with more to follow:

  •     Bipolar transistor output characteristics, Ic vs Vce.
  •     Bipolar transistor input characteristics, Vbe vs Ib.
  •     MOSFET transfer function, Id vs Vgs.
  •     JFET transfer function, Id vs Vgs.
  •     PN junction I/V curves, forward and reverse options (for Zener diodes).


Curve tracing is performed using test parameters in the range of +/-12V, +/-12mA. All curve-tracing data can be instantly pasted into Excel© for further graphing and analysis. PC Software is included with the DCA Pro on a Peak USB memory stick. Software for Windows XP and  7.

See here for Information on Software Installation and Firmware updates.

Independent Online Reviews  Video#1, Video#2, Video#3, Video#4, Video#5Article#1

For more information : Peak Atlas Userguide

Atlas DCA55 and DCA75 Comparison 

  Feature Atlas DCA55 Atlas DCA75  
Display type 16 x 2 Alphanumeric 122 x 32 Graphic
Communications - USB (Win USB built-in driver)
Power supply 1 x GP23 12V battery 1 x AAA and USB power
Test Signals Range (typ) +/-5V, +/-5mA +/-12V, +/-12mA
Test Signal Resolution 10 bits 12 bits
Voltage measurement resolution 20mV 3mV
Diode / LED support Yes Yes
Transistor support Yes Yes
MOSFET support Yes Yes
IGBT support - Yes
JFET support Yes Yes
Zener diode analysis - Yes
Voltage regulator analysis - Yes
JFET pinch-off measurement - Yes
JFET on-threshold measurement - Yes
JFET transconductance - Yes
Depletion mode threshold measurement   Yes
Saturation voltage measurement - Yes
Leakage current measurement Yes Yes
Online upgradeable firmware - Yes
Online upgradeable PC software N/A Yes
Sounder - Yes (with mute on/off)


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