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Advanced semiconductor analyzer with curve tracing

Peak DCA75: Atlas DCA Pro Semiconductor Tester

Peak DCA75

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Advanced Semiconductor Tester with Curve Tracing

Analyze semiconductors easily with the Peak DCA75: Atlas DCA Pro Semiconductor Tester with Curve Tracing. The new Atlas DCA75 Pro transistor tester offers superb functionality and style. The analysis portfolio is even bigger than the DCA55 while offering enhanced message display and intelligent component identification. This instrument displays incredibly detailed information in fully scrollable pages. The Peak Atlas DCA Pro combines an impressive analysis portfolio that is user-friendly. It will measure the gain of transistors, the threshold voltage of MOSFETs, and semiconductor voltage drops. The Atlas DCA75 has more component testing capabilities than the DCA55, but also offers full curve tracking which is downloadable to an Excel file (via USB).


  • Stand-alone or with a PC
  • Automatic component type identification
  • Automatic pinout identification
  • Special feature identification such as protection diodes and resistor shunts
  • Bipolar transistors: gain and leakage current measurements, silicon and germanium detection
  • Gate threshold measurement foreEnhancement Mode MOSFETs
  • Semiconductor forward voltage measurement for diodes, LEDs and transistor base-emitter junctions
  • Automatic and manual power-off



Peak Test Current into Short Circuit -5.5 mA to 5.5 mA
Peak Test Voltage Across Open Circuit -5.1 V to 5.1 V
Dimensions 4.1 in. x 2.8 in. x 0.8 in. (103 mm x 70 mm x 20 mm)
Weight 3.5 oz (0.098kg)
Operating temperature range 10° - 40°C (50F - 104F)


Gain range (Hfe) 4 - 65 000
Gain accuracy ± 3% ± 5 Hfe
Vceo test voltage 2.0 V - 3.0 V
Vbe accuracy -2% -20 mV to +2% + 20 mV
VBE for Darlington (shunted) 0.95 V - 1.80 V (0.75 V - 1.80 V)
Base-emitter shunt threshold 50 kOhm - 70 kOhm
BJT collector test current 2.45 mA - 2.55 mA
BJT acceptable leakage 0.7 mA
  • Gate Threshold Range: 0.1 V - 5.0 V
  • Threshold Accuracy: -2% -20 mV to +2% +20 mV
  • Drain Test Current: 2.45 mA - 255 mA
  • Gate Resistance: 8 kOhm
Depletion Drain Test Current 4.5 mA
JFET Drain-Source Test Current 0.7 mA


Gate Test Current 4.5 mA
Load Test Current 5.0 mA


Test Current 5.0 mA
Voltage Accuracy -2% -20 mV to +2% +20 mV
Vf for LED Ddentification 1.50 V - 4.00 V
Short Circuit Threshold 10 Ohm


Type MN21 / L1028 / GP23A 12 V alkaline
Voltage Range 7.50 V - 12 V
Warning Threshold 8.25 V

Specification Summary at 20°C (68°F) unless otherwise specified.

  1. great product review by David on 6/27/2016

    this is a great product help shorten repair times by identifying problem transistors and checking matched sets of rf transistors . print test results for customers thanks

  2. DCA75 Pro review by jellybean on 7/7/2015

    Amazing piece of gear for a fantastic price.

    After checking everywhere, Velleman store is the cheapest place in the USA to buy this unit. With the free ground shipping it was $150 to my door. The UPS ground took around 3 days to arrive.

    As far as the unit, you can find plenty of reviews on eevblog and other various sites. They are all universally positive. The company which produces the unit responds to user concerns personally, and all manufacturing is done in the UK. Firmware is updates constantly as new features are added, some due to end user input.

    It takes a AAA battery (included), and also includes a USB stick with the Windows software which allows you to use it with basic functionality as well as basic curve tracing features, which are:

    * Ic / Vce
    * HFE / Vce
    * HFE / Ic

    * Id / Vds
    * Id / Vgs

    * Ic / Vce
    * Ic / Vge

    * Id / Vds
    * Id / Vgs

    Voltage reg (up to 12V)
    * Vout & Iq / Vin

    The unit works off of USB power when plugged in to a computer (no batt needed).

    I created a basic breakout board to easily pop in an out transistors for test and comparison. To-92, To-18, To- 220, To-3, etc. You can see a picture of it here:

    * http://i.imgur.com/rXBRUmw.png

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User manual
User Guide

User manual
Software Installation Guide

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 Warning: this product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov/product