Professional Design Miniature circuit breaker-FTB2LE Export to Cambodia


Technical data

Product illustration

Tripping characteristic

Exterior and dimensions

Related video

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Product illustration:


 Technical Data

Model FTB2LE Miniature circuit-breaker
Number of poles IP+N,2P,3P,3P+N,4P
Rated frequency: AC 50/60Hz
Rated voltage (V) AC 230/400
Rated current (A) C


6, 10, 16, 20, 25, 32, 40, 50, 63


Rated residual operating current(mA) AC A 30


Rated residual non-operating current(mA) AC




Residual current breaking time 30mA≦0.1s  250mA≦0.04s
Max. breaking time(s) 0.1
Rated short-circuit breaking capacity(KA) 6.5
Rated residual current breaking capacity(KA) 4.5
Mechanical & electrical life: 20,000 operations
Protection rating IP20
Installation On DIN rail 35mm according to JB6525
Connection capacity: Cross-section of conductors up to 25mm², Cross-section of busbar from 0.8-2mm²,reversibility of connections
Tightening torque 2 Nm
Ambient temperature (°C) - 5°C ~ +40°C
Altitude (m) ≤2000m
Relative air humidity no more than 95%
Pollution degree
Installation condition Used in place without obvious shock and vibration
Weight (g) 340 420 530 630 710


Exterior and dimensions


Number of poles Width(mm) Modules
1 / 2 54 3
2 / 2 72 4
3 / 3 100 5.5
3 / 4 112.5 6.25
4 / 4 130.5 7.25




2000 Chevy Malibu MAF Ground problem
This is a good video on how to check sensor grounds using a voltmeter. Once you get more comfortable with this type of testing, it is far more accurate than the ohmmeter. The key though is to make sure the circuit you are testing is “loaded”.
Also to all of you “free diagnostics” parts supply companies. YOU CANNOT CHANGE A PART BASED ON A TROUBLE CODE!

Engine Performance Diagnostics chapter 12

– hesitation
– low power
– MAF sensor code (P0102)

– repair bad engine block ground connector

Tests shown
– MAF sensor scan data tests
– MAF sensor voltmeter or scope testing
– how to test a sensor ground circuit
– how to locate a bad block ground

Tools used
– scan tool
– lab scope
– digital multimeter
– backprobing tools

– (Chapter 12) Mass Airflow Sensor Testing

Related videos
– MAF sensor code P0102 from a bad engine computer – (Chevy van)
– How to test a GM MAF Sensor (Part 1)

– How to test a GM MAF Sensor (Part 2)

– How to test a MAF sensor using a Picoscope – GM

For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at as an eBook or paper book.
Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium right here on YouTube. There is a 14 day free trial.
On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!

This demonstration is on an X3 with an N52 that has the electronic water pump. This shows how to check and bleed the cooling system and how to run the electrical water pump which would be needed after a cooling flush or work on the cooling system.
This vehicle had started overheating causing the fan to turn on high. There were communication faults for the water pump which had failed and needed replacement.

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