Chip capacitors are similar in shape to chip resistors, usually chip capacitors are white substrate, there are most of the tantalum electrolytic capacitors are black substrate, but its positive side is also marked with white polarity. Chip capacitors many because of the limitations of the volume, can not indicate its capacity, that chip capacitors how to see the size?
How to identify the size of chip capacitors? Chip capacitors many because of the volume limitations, can not indicate its capacity, so generally are in the patch production of the whole disc is marked. If it is a single chip capacitor, use a capacitance tester to measure its capacity. If it is the same factory label, generally speaking, the capacity of the darker colour is larger than the lighter colour, brownish grey > light purple > greyish white. Of course the best way is to blow it down with a hot air gun, wait for it to cool down and then measure it with the capacitance block of a digital meter or a capacitance meter.
How to judge the capacity of chip capacitors? Generally speaking, chip capacitors are not silk-screened. So if the visual inspection, basically the larger the volume of the larger capacity, but it is not absolute, so the visual inspection can only know roughly, and also need a certain experience. Capacitor electrical requirements are high, it is best to use the bridge and other instruments for measurement, otherwise the use of the breakdown will be scrapped.
Where can I see the size of chip capacitors? Chip capacitors many because of the volume limitations, can not indicate its capacity. So it is generally marked on the whole disc in the SMD production. If it is a single chip capacitor, to use capacitance tester can measure its capacity.
Multimeter to measure the size:
1, the black pen connected to COM, the red pen connected to the right most above;
2, will be connected to the gear in the measured capacitance size of the gear;
3, the multimeter pen connected to both ends of the test can be known;
To learn to identify chip capacitors should identify the chip capacitors on the numerical marking method, usually there are three kinds:
1, a letter and a number of marking methods, in the white substrate printed on a black letter and a black number or in the chip tantalum electrolytic capacitors on the black substrate printed on a white letter and a white number as a code, the letters indicate the first two digits of the capacitance. The latter number indicates the number in front of the number after adding a few ‘0’.
2, a letter and a colour marking method, in the chip capacitor base printed on a colour plus a combination of letters as a code to indicate the capacitance. The meaning of the letters and marking the same approach, the same colour is also shown in front of the letters represented by the number of the back plus a few ‘0’.
3, the colour ring marking method, this is a cylindrical chip capacitors usually use a method. The first two rings indicate the capacity of the first two useful figures, the third ring indicates that the first two useful figures after adding a few ‘0’, the fourth ring indicates the error value, the fifth ring indicates the temperature coefficient of the capacitor.
Identification of chip capacitors
Chip capacitor identification can be based on these two objectives: 1, size (f); 2, withstand voltage value (V). Mathematical counting method: the standard value of 104, the capacity is: 10X10000pf = 0.1uf. If the standard value of 473, that is, 47X1000pf = 0.047uf. (After the 4, 3, are shown how many times 10). Another example: 332 = 33X100pf = 3300pf. capacitor withstand voltage marking there is a choice of a number and a combination of letters. The number indicates the power of 10 index, the letter indicates the value, the unit is V (volts).
