MCM Electronics

Atlas DCA Meter - Semiconductor and Component AnalyzerMCM Part #: 22-8242  |  Peak Part #: DCA55

Atlas DCA Meter - Semiconductor and Component Analyzer 4.8 stars from 2 reviews.
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An intelligent, slim, and invaluable component analyzer that presents the user with detailed component information in concise, easy to read, scroll-able pages via its LCD display. The unit negates the need for searching through data books in many cases and is suitable for use with bi-polar transistors, MOSFETS, low power thyristors, and triacs, diodes, and diode networks and LEDs including bi and tricolor yypes. Supplied with battery and universal test clips.

Product Description

The Peak Atlas DCA
A fresh approach to component analysis has resulted in the fantastic Peak Atlas DCA, an intelligent, slim and invaluable tool. A world of detailed component data has never been so accessible.

Just connect your component any way round and press the test button. The Atlas DCA will then present you with detailed component information in concise, easy to read, scrollable pages. The displayed information will include: the component type, special component features, component pinout, and measured parameters (such as gain, leakage current, gate threshold voltages, volt drops etc...). No more searching through data books and catalogues in order to identify components and pinouts, the Atlas DCA does it all.

Analysis Portfolio
It doesn't matter how you connect the test clips to the component, the Atlas DCA can analyse a vast number of different component types including bipolar transistors, enhancement mode MOSFETs, depletion mode MOSFETs, Junction FETs (only gate pin identified), low power thyristors and triacs (less than 5mA trigger and hold), diodes, multiple diode networks, LEDs, bi-colour and tri-colour LEDs. It will even identify special component features such as diode protection and shunt resistors in transistors. For two-leaded components such as diodes and LEDs, any pair of test clips can be applied to the component any way round, the Atlas DCA sorts it all out for you. Atlas DCA testing a BFY51 Atlas DCA testing a bicolour LED Atlas DCA testing a diode

There is no on/off switch, power is automatically turned on at the start of an analysis and then automatically turned off if inactive for more than 30 seconds. Each page of displayed information is presented in manageable amounts, with each page being displayed when you want it. If you want to concentrate on the "pinout" page then just select that page, you don't have to see information that you don't need.

The Atlas DCA Package
The Peak Atlas DCA is supplied complete with a long life battery, universal test probes and a comprehensive illustrated user guide.

Information measured includes:

  • Component type identification
  • Special feature identification
  • Pin out identification
  • Measured parameters such as gain, gate threshold, voltages, volt drop, etc.
  • Simple On/Off and scroll controls
  • Auto power off after 30 seconds

Parameters Minimum Typical Maximum Notes
 Peak test current into S/C -5.5mA   5.5mA 1
 Peak test voltage across O/C -5.1V   5.1V 1
 Measurable transistor gain range (HFE) 4   65,000 2
 Transistor gain accuracy (for HFE<1000) -3%-5 HFE   +3%+5 HFE 2,9
 Transistor VCEO 2.0V   3.0V 2
 Transistor VBE accuracy -2%-20mV   +2%+20mV 9
 VBE threshold for Darlington identification   0.9V   3
 VBE threshold for Darlington identification (shunted)   0.8V   4
 Acceptable transistor VBE     1.8V  
 Base-emitter shunt resistance threshold   60k    
 Transistor collector-emitter test current 2.45mA 2.50mA 2.55mA  
 Acceptable transistor collector leakage   1.0mA   6
 MOSFET gate threshold range 0.1V   5.0V 5
 MOSFET gate threshold accuracy -2%-20mV   +2%-20mV 5
 MOSFET drain-source test current 2.45mA 2.50mA 2.55mA  
 MOSFET minimum acceptable gate resistance   8k    
 Thyristor/Triac gate test current   4.5mA   7
 Thyristor/Triac load test current   5mA    
 Diode test current     5mA  
 Diode forward voltage accuracy -2%-2mV   +2%+2mV  
 VF threshold for LED   1.50V    
 Short circuit detection threshold   10 ohms    
 Battery type GP23A 12V Alkaline
 Battery voltage range 7.50V 12V    
 Battery voltage warning threshold   8.25V    
 Inactivity power-down period   30 secs    
 Dimensions (excluding test leads) 103 x 70 x 20 mm
  4.1" x 2.8" x 0.8"
 Operating temperature range 0°C   50°C 8
  32°F   122°F  

Notes (from table above):
1. Between any pair of test clips.
2. Collector current of 2.50mA.
3. Resistance across reverse biased base-emitter > 60k.
4. Resistance across reverse biased base-emitter < 60k.
5. Drain-source current of 2.50mA.
6. Collector-Emitter voltage of 5V.
7. Thyristor quadrant 1, Triac quadrants I and III. 
8. Subject to acceptable LCD visibility.
9. BJT with no shunt resistors.

Product Reviews

  • "Excellent tool for sorting junk box semiconductors" by wb0rxx on 8/13/2014
    Overall: 4.5 out of 5
    Top 25 Contributor

    For years I used a Radio Shack 22-330 Solid-State Components Tester to find out basic information (pin-out, type, good/bad) of my ever growing collection of junk box semiconductors. It works fine, but lacks the measuring ability of the Peak 22-8242. The Peak instantly identified a number parts that I thought were transistors as SCRs (thyristor in Peak jargon.) It was also niffy to be able to measure hfe, so I can find a "hot" transistor for a given project or locate a "matched" pair. The Peak seems to be well engineered overall, but the case and leads seem to be a bit flimsy and fragile. One cannot just toss this unit in the bottom of a tool bag and expect it to last very long. It also seems to be a bit pricy for the average hobbyist. However, a good tool like this is well worth the cost if it saves you time and perhaps money if you use it commercially.

  • "Atlas D55 analyzer" by srgast on 10/30/2012
    Overall: 5 out of 5

    A great product. I thought the price was a little high until I used it. It provides a lot of information on the device being tested and is very easy to uise. Recommended.

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Package Specifications & Dimensions
Weight:0.37 lbs.
Warranty:90 days
Need to Return?
Length:8 in.
Width:5.5 in.
Height:1.25 in.
Shipping Information
Extra Shipping Charge:No
Drop Ship:No
Catalog Pages

MCM Cat 57, Page 1237

MCM Cat 56, Page 1099

PDF Reference

Requires Adobe Acrobat Reader.

Mfr. Info

Peak Logo
Mfr. Name:Peak
Mfr. Part Number:DCA55
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