SMT Passive Parts (Reference Article)

If you're looking for a handy reference for SMT parts, this may be a great place to start. We have some basic information to decode the different codes and parameters for resistors, capacitors, diodes, and inductors. 

 

Resistors:

1) limit the amount of current flowing through the circuit, the resistance has no polarity;

2) unit: ohm (Ω) ;

3) Resistance value indicates the unit: Ω, K, M

4) Part size

Componet Identifier

MM

1005

1608

2012

3216

3225

5025

6332

IN

0402

0603

0805

1206

1210

2010

2510


5) Error value

Common resistance(with three numbers):5% above。

Precision Resistance(with four numbers:1% above.

 Error value

 

 Capacitor:

1) The capacitor' function: to store electrical energy;

2) Unit: Farah (F) ;

3) Capacitance value indicates the unit: U, N, P, F

4) Part size

Componet Identifier

MM

1005

1608

2012

3216

3225

5025

6332

IN

0402

0603

0805

1206

1210

2010

2510

5) Capacitance label indication

Capacitance label indication

Diode:

1) Semiconductor component: converting the alternating current into a direct current ;

2) Represented by  (D);

3) Polar Material:  positive  and negative;

Semiconductor component

 

 

Transistor:

1) Amplify current, voltage, waveform mixing, frequency exchange, etc.;

2) Represented by  (Q);

Transistor

Inductance:

1) filter or carry frequency, convert large current and voltage ;

3) Represented by (L);

Inductance

   SMT involves all kinds of parts and styles, many of which have formed industry-wide standards, mainly chip capacitance resistors, etc.; Some others are still undergoing constant changes.

     SMT process help mount component with all different sizes  on the PCB, combining  PCB, component and solder paste together, fulfilling our demand.

 

Posted by Liang Guo

Liang is a skillful Electronics Engineer with an ability to solder almost anything. By anything, we mean 15+ year old shattered HDD Circuitry to retro gaming consoles .

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