Capacitance value reading method [zz]

Address: http://blog.sina.com.cn/s/blog_629008650100m4jh.html

 

The unit of capacitor capacity is "Farah", which is represented by the letter "F. smaller units than F are MF (MB method) μ F, (Micromethod), NF (ML method), PF (Micromethod)

1f = 1000mf = 1000000 μF = 000000000nf = 00000000pf

1 μF = 1000nf = 000000pf

1nf = 1000pf

Because the capacity of the capacitor "F" is very large, we usually see units of μF, NF, and PF. In the common circuit diagram, some of the μ F and PF will omit F to show μ, and the actual capacitance labeling method of P is generally less than 9900p, and the expression of P is greater than 0.01 μ (including 0.01) expressed in μ.

Capacitor capacity conversion:

1, N (ML) Representation
1n = 1000 P

10n = 0.01 μs
100n = 0.1 μs
For example, 3n3 indicates 3300pf.
22n indicates 0.022 μF 470n indicates 0.47 μF

 3Direct tagging:
0.01 μ 0.047 μ
3300pf 560pf: the actual capacity does not need to be converted

4, Expressed by the number of squares:
10 10 + n = 10 p
101 10 + 0 = 100 P
102 10 + 00 = 1000 P
103 10 + 000 = 0.01
104 10 + 0000 = 0.1
105 10 + 00000 = 1μs
The first two digits are the capacity. The third digit is the multiplication number. The multiplication unit is P. For example, 221 indicates that 22 is added with a zero value equal to 220 p, and 472 indicates 47 plus two zeros equal to 4700 p, 683 indicates 68 plus three zeros equals 0.068 μF

5, Expressed in symbols:

These symbols are mostly used for SMD or small electrolytic capacitors. The reading method is similar to the multiplication number. Its capacity units are generally μF-level.

Character	Capacity unit μF	Character	Capacity unit μF
0r1	0.1 μF	100	10μf
R15	0.15 μF	150	15μf
R22	0.22 μF	220	22μf
R33	0.33 μF	330	33 μF
R39	0.39 μF	390	39 μF
R47	0.47 μF	470	47 μF
R56	0.56 μF	560	56 μF
R68	0.68 μF	680	68 μF
R82	0.82 μF	820	82 μF
010	1μF	101	100 μF
1r5	1.5 μF	151	150 μF
2r2	2.2 μF	221	220 μF
3r3	3.3 μF	331	330 μF
3r9	3.9 μF	391	390 μF
4r7	4.7 μF	471	470 μF
5r6	5.6 μF	561	560 μF
6r8	6.8 μF	681	680 μF
8r2	8.2 μF	821	820 μF

Identify method of capacitor error precision value code:

Capacitance error value A:-0 + 5%, J: ± 5%, K: ± 10%, M: ± 20%, Z:-20% + 50%

Capacitor pressure value labeling method:

Capacitor Voltage: 16v, 25v, 35v, 50v, 63v, 100v, 160v, 250v, 400v, 630v, 1000v, 1250v, 2000v, 3000 V
To a higher voltage, the actual capacitor voltage value is "1250" and not 1250 v.

The following method identifies the external Capacitor Voltage representation:

Symbol	Pressure Value v	Symbol	Pressure Value v	Symbol	Pressure Value v	Symbol	Pressure Value v	Symbol	Pressure Value v	Symbol	Pressure Value v
0a	1.0 V	0b	1.25 v	0c	1.6 V	0d	2.0 V	0e	2.5 V	0f	3.15 v
1a	10 V	1B	12.5 v	1c	16 V	1D	20 V	1e	25 V	1f	31.5 v
2a	100 V	2b	125 V	2c	160 V	2d	200 V	2e	250 V	2f	315 v
3A	1000 V	3b	1250 v	3c	1600 V	3D	2000 V	3E	2500 V	3f	3150 v
4A	10000 v	4b	12500 v	4C	16000 v	4d	20000 v	4e	25000 V	4f	31500 v
0g	4.0 V	0 h	5.0 V	0j	6.3 V	0 k	8.0 v	0z	9.0 v
1g	40 V	1 H	50 V	1j	63 v	1 K	80 V	1z	90 v
2G	400 V	2 h	500 V	2j	630 v	2 K	800 V	2Z	900 V
3G	4000 v	3 H	5000 V	3j	6300 V	3 K	8000 V	3z	9000 V
4G	40000 v	4 h	50000 v	4j	63000 v	4 K	80000 v	4Z	90000 v

Note: CharactersCodeDescription: The number of valid letters. The Arabic numerals before the English letters represent orders of magnitude. 1 represents 101, that is, 10, and 2 represents 10.
That is, 100,3 indicates 10 or 1000.

For example, 2j222j indicates that the pressure is 630 V and the capacity is 2200 p.
Accuracy ± 5%, for example, 2g473k indicates a pressure of 400 V.
Capacitor capacity 0.047 μF precision ± 10%

Electric capacity labeling has a rule like resistance, usually
10, 22, 33, 47, 56, 68, 82, 100 into the level, it is easy to distinguish with the pressure value.

UF, NF, PF capacitor unit calculation table:

 

0.000001 UF	0.001nf	1pf
0.00001 UF	0.01nf	10pf
0.0001 UF	0.1nf	100pf
0.001 UF	1nf	1000pf
0.01 UF	10nf	effecpf
0.1 UF	100nf	100000pf
1 UF	1000nf	000000pf
10 UF	NF	0000000pf
100 UF	100000nf	00000000pf