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Semiconductor component analyzer

Peak Atlas DCA55: Semiconductor Component Analyzer

Peak DCA55

Peak Atlas DCA Semiconductor Component Tester and Analyzer

The Peak Atlas DCA55 makes analyzing semiconductors and identifying transistors easy. It's small size and light weight make it super portable and the digital display allows you to take reads with no fuss. With it's in-depth reads and wide analysis portfolio, the Atlas DCA55 allows you to skip the data books when identifying components.

To operate your DCA55, simply connect the test clips and use the two on device buttons–no messing with wires and switches. All information is then displayed in scrollable format on the LED screen. It may be small, but this Atlas DCA has the ability to analyze a wide range of components.

Use this tester to help you repair audio equipment, computer monitors, and a slew of other useful electronics. With its auto power off feature and long battery life, the Atlas DCA55 will serve as your go-to tool for many projects to come.


  • Automatic component type identification
    • Bipolar transistors
    • Darlington transistors
    • Enhancement Mode MOSFETs
    • Depletion Mode MOSFETs
    • Junction FETs
    • Low power sensitive triacs
    • Low power sensitive thyristors
    • Light emitting diodes
    • Bicolor LEDs
    • Diodes
    • Diode networks
  • 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 for Enhancement 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 0° - 50°C (32° - 122°F)


Gain range (Hfe) 4 - 20,000
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 0.5 mA - 5.5 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.


 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