SMD Resistor Coding
All SM resistors conform to a 3-digit or 4-digit code. But there are a number of codes, according to the tolerance of the resistor. It's getting very complicated.
Here is a basic 3-digit SM resistor:
The first two digits represent the two digits in the answer. The third digit represents the number of zero's you must place after the two digits. The answer will be OHMS. For example GIVEN: 334 is written 33 0 000. This is written 330,000 ohms. The comma can be replaced by the letter "k". The final answer is: 330k.
222 = 22 00 = 2,200 = 2k2
473 = 47 000 = 47,000 = 47k
105 = 10 00000 = 1,000,000 = 1M = one million ohms
There is one trick you have to remember. Resistances less than 100 ohms are written: 100, 220, 470. These are 10 and NO zero's = 10 ohms = 10R
or 22 and no zero's = 22R or 47 and no zero's = 47R. Sometimes the resistor is marked: 10, 22 and 47 to prevent a mistake.
TAKE-NOTE:
R = ohms
k = kilo ohms = 1,000 ohms
M = Meg = 1,000,000 ohms
The 3 letters (R, k and M) are put in place of the decimal point. This way you cannot make a mistake when reading a value of resistance.
for 3 digit code mao ni xa ang mga common number based on my experience:
0R1 = 0.1 ohm
R22 = 0.22 ohm
R33 = 0.33 ohm
R47 = 0.47 ohm
R68 = 0.68 ohm
R82 = 0.82 ohm
1R0 = 1R or 1 ohm
1R2 = 1R2 or 1.2 ohm
2R2 = 2R2 or 2.2 ohm
3R3 = 3.3 ohm
4R7 = 4.7 ohm
5R6 = 5.6 ohm
6R8 = 6.8 ohm
8R2 = 8.2 ohm
100 = 10R or 10 ohm
120 = 12R or 12 ohm
150 = 15R or 15 ohm
180 = 18 ohm
220 = 22 ohm
270 = 27 ohm
330 = 33 ohm
390 = 39 ohm
470 = 47 ohm
560 = 56 ohm
680 = 68 ohm
820 = 82 ohm
101 = 100 ohm
121 = 120 ohm
151 = 150 ohm
181 = 180 ohm
221 = 220 ohm
271 = 270 ohm
331 = 330 ohm
391 = 390 ohm
471 = 470 ohm
561 = 560 ohm
681 = 680 ohm
821 = 820 ohm
102 = 1 kilo ohm
122 = 1.2 kilo ohm
152 = 1.5 kilo ohm
182 = 1.8 kilo ohm
222 = 2.2 kilo ohm
272 = 2.7 kilo ohm
332 = 3.3 kilo ohm
392 = 3.9 kilo ohm
472 = 4.7 kilo ohm
562 = 5.6 kilo ohm
682 = 6.8 kilo ohm
822 = 8.2 kilo ohm
103 = 10 kilo ohm
123 = 12 kilo ohm
153 = 15 kilo ohm
183 = 18 kilo ohm
223 = 22 kilo ohm
273 = 27 kilo ohm
333 = 33 kilo ohm
393 = 39 kilo ohm
473 = 47 kilo ohm
563 = 56 kilo ohm
683 = 68 kilo ohm
823 = 82 kilo ohm
104 = 100 kilo ohm
124 = 120 kilo ohm
154 = 150 kilo ohm
184 = 180 kilo ohm
224 = 220 kilo ohm
274 = 270 kilo ohm
334 = 330 kilo ohm
394 = 390 kilo ohm
474 = 470 kilo ohm
564 = 560 kilo ohm
684 = 680 kilo ohm
824 = 820 kilo ohm
105 = 1 mega ohm
125 = 1M2 or 1.2 mega ohm
155 = 1.5 mega ohm
185 = 1.8 mega ohm
225 = 2.2 mega ohm
275 = 2.7 mega ohm
335 = 3.3 mega ohm
395 = 3.9 mega ohm
475 = 4.7 mega ohm
565 = 5.6 mega ohm
685 = 6.8 mega ohm
825 = 8.2 mega ohm
106 = 10M0 or 10 mega ohm
& so on
for 4 digit code mao ni xa ang mga common number based on my experience
0000 = 00R
00R1 = 0.1 ohm
0R22 = 0.22 ohm
0R47 = 0.47 ohm
0R68 = 0.68 ohm
0R82 = 0.82 ohm
1R00 = 1R or 1 ohm
1R20 = 1R2 or 1.2 ohm
2R20 = 2R2 or 2.2 ohm
3R30 = 3.3 ohm
4R70 = 4.7 ohm
5R60 = 5.6 ohm
6R80 = 6.8 ohm
8R20 = 8.2 ohm
10R0 = 10R or 10 ohm
12R0 = 12R or 12 ohm
15R0 = 15R or 15 ohm
18R0 = 18 ohm
22R0 = 22 ohm
27R0 = 27 ohm
33R0 = 33 ohm
39R0 = 39 ohm
47R0 = 47 ohm
56R0 = 56 ohm
68R0 = 68 ohm
82R0 = 82 ohm
91R0 = 91 ohm
1000 = 100 ohm
1200 = 120 ohm
1500 = 150 ohm
1800 = 180 ohm
2200 = 220 ohm
2700 = 270 ohm
3300 = 330 ohm
3900 = 390 ohm
4700 = 470 ohm
5600 = 560 ohm
6800 = 680 ohm
8200 = 820 ohm
9100 = 910 ohm
1001 = 1 kilo ohm
1201= 1.2 kilo ohm
1501 = 1.5 kilo ohm
1801 = 1.8 kilo ohm
2201 = 2.2 kilo ohm
2701 = 2.7 kilo ohm
3301 = 3.3 kilo ohm
3901 = 3.9 kilo ohm
4701 = 4.7 kilo ohm
5601 = 5.6 kilo ohm
6801 = 6.8 kilo ohm
8201 = 8.2 kilo ohm
9101 = 9.1 kilo ohm
1002 = 10 kilo ohm
1202 = 12 kilo ohm
1502 = 15 kilo ohm
1802 = 18 kilo ohm
2202 = 22 kilo ohm
2702 = 27 kilo ohm
3302 = 33 kilo ohm
3902 = 39 kilo ohm
4702 = 47 kilo ohm
5602 = 56 kilo ohm
6802 = 68 kilo ohm
8202 = 82 kilo ohm
9102 = 91 kilo ohm
1003 = 100 kilo ohm
1203 = 120 kilo ohm
1503 = 150 kilo ohm
1803 = 180 kilo ohm
2203 = 220 kilo ohm
2703 = 270 kilo ohm
3303 = 330 kilo ohm
3903 = 390 kilo ohm
4703 = 470 kilo ohm
5603 = 560 kilo ohm
6803 = 680 kilo ohm
8203 = 820 kilo ohm
9103 = 910 kilo ohm
1004 = 1 mega ohm
1204 = 1M2 or 1.2 mega ohm
1504 = 1.5 mega ohm
1804 = 1.8 mega ohm
2204 = 2.2 mega ohm
2704 = 2.7 mega ohm
3304 = 3.3 mega ohm
3904 = 3.9 mega ohm
4704 = 4.7 mega ohm
5604= 5.6 mega ohm
6804 = 6.8 mega ohm
8204 = 8.2 mega ohm
9104 = 9.1 mega ohm
1005 = 10M0 or 10 mega ohm
& so on
isinali ko narin ito para mas madaling ma-identify at ma-aware ang iba
