Common SMD resistors, capacitors, inductors package

Now commonly used resistors, capacitors, inductors, diodes are SMD package. SMD package with four-bit digital identification, indicating the length and width of the device. SMD resistors are five and one or two of the accuracy, when the purchase is not specifically said to mean a percentage of five. Generally said Chip capacitor is a multilayer ceramic capacitor (MLCC), also known as the monolithic capacitor. The schedule is the parameter of the chip resistor.

Inch (MIL)	Metric (mm)	Length (L) (mm)	Width (W) (mm)	High (t) (mm)	A (mm)	B (mm)	Conventional Power W	Improve Power W	Maximum work Voltage V
0201	0603	0.60±0.05	0.30±0.05	0.23±0.05	0.10±0.05	0.15±0.05	1/20		25
0402	1005	1.00±0.10	0.50±0.10	0.30±0.10	0.20±0.10	0.25±0.10	1/16		50
0603	1608	1.60±0.15	0.80±0.15	0.40±0.10	0.30±0.20	0.30±0.20	1/16	1/10	50
0805	2012	2.00±0.20	1.25±0.15	0.50±0.10	0.40±0.20	0.40±0.20	1/10	1/8	150
130W	3216	3.20±0.20	1.60±0.15	0.55±0.10	0.50±0.20	0.50±0.20	1/8	1/4	200
1210	3225	3.20±0.20	2.50±0.20	0.55±0.10	0.50±0.20	0.50±0.20	1/4	1/3	200
1812	4832	4.50±0.20	3.20±0.20	0.55±0.10	0.50±0.20	0.50±0.20	1/2		200
2010	5025	5.00±0.20	2.50±0.20	0.55±0.10	0.60±0.20	0.60±0.20	1/2	3/4	200
2512	6432	6.40±0.20	3.20±0.20	0.55±0.10	0.60±0.20	0.60±0.20	1		200

2) The relationship between the package, power and voltage of SMD resistor is as follows:

inch (MIL) metric (mm) rated power @ 70°c max operating voltage (V)

0201 0603 1/20w 25

0402 1005 1/16w 50

0603 1608 1/10w 50

0805 1/8w 150

1206 3216 1/4w 200

1210 3225 1/3w 200

1812 4832 1/2w 200

5025 3/4W 200

2512 6432 1W 200

3) precision and resistance of chip resistors

The error accuracy of SMD resistor resistance is ±1%, ±2%, ±5%, ±10% accuracy,

J-Indicates a precision of 5%,

The F-representation precision is 1%.

T-Indicates a taping package

Resistance range from 0r-100m

4) Characteristics of chip resistors

• Small size and light weight;

• Suitable for reflow soldering and wave soldering;

• Stable electrical performance, high reliability;

• Low assembly costs and matching with automatic placement equipment;

• High mechanical strength and superior high frequency characteristics.

Axial-Two feet straight
The axial is the encapsulation of common inline resistors and is also used for devices such as inductors. The following number refers to the spacing of two pads.
AXIAL-0.3 low power plug-in resistor (1/4w), common diode (1N4148), Color-ring inductor (10uH)
AXIAL-0.4 1 A diode for rectification (1N4007), 1A Schottky diode for switching power supply (1n5819), transient protection diode
AXIAL-0.8 high-power direct-Plug resistors (1W and 2W)

Two Capacitance:

1) chip capacitor can be divided into two polar and polarity, the range of capacitance from 0.22pf-100uf

Electrodeless capacitance The following two types of packages are most common, namely 0805, 0603;

Inch size metric Size length width thickness

0402 1005 1.00±0.05 0.50±0.05 0.50±0.05

0603 1608 1.60±0.10 0.80±0.10 0.80±0.10

0805 2012 2.00±0.20 1.25±0.20 0.70±0.20

1206 3216 3.20±0.30 1.60±0.20 0.70±0.20

1210 3225 3.20±0.30 2.50±0.30 1.25±0.30

1808 4520 4.50±0.40 2.00±0.20≤2.00

1812 4532 4.50±0.40 3.20±0.30≤2.50

2225 5763 5.70±0.50 6.30±0.50≤2.50

3035 7690 7.60±0.50 9.00±0.05≤3.00

The smaller the general capacitance, the greater the pressure value can be, the common withstand voltage is 6.3V, 10V, 16V, 25V, 50V, 100V, 200V, 500V, 1000V, 2000V, 3000V, 4000V

There are more polar capacitance with tantalum capacitor, according to its pressure difference, chip capacitor can be divided into a, B, C, D four series, as follows:

Type package form withstand voltage

A 3216 10V

B 3528 16V

C 6032 25V

D 7343 35V

2) Identification accuracy level of common capacitance

b+_0.1%

c+_0.25%

d+_0.5%

f+_1%

g+_2%

j+_%

k+_10%

m+_20%

n+_30%

3) Characteristics of various chip capacitors

The material of the chip capacitor is divided into three kinds, npo,x7r,,x5r,y5v, tantalum capacitor

NPO This material is the most stable electrical performance, almost does not vary with temperature, voltage and time changes, suitable for low loss, stability requirements of high-frequency circuits. Capacity accuracy of about 5%, but the use of this material can only do smaller capacity, conventional 100PF, 100PF to 1000PF can also be produced, but the price is higher.

x7r this kind of material than NPO stability is poor, but the capacity to do more than the NPO materials, high pressure, capacity accuracy of about 10%, capacitance in general between 100pf~2.2f.

y5v the capacitance of this kind of medium, its stability is poor, the capacity deviation is about 20%, is sensitive to the temperature voltage, but this kind of material can achieve very high capacity, and the price is low, apply to the circuit that the temperature changes little. The electric capacity range is large, generally 1000pf~100f.

X5R has small capacity and small volume, which is suitable for decoupling and output filtering in computer, power supply and automotive circuits.

tantalum Capacitor small size, large capacity, low leakage current, long service life, excellent comprehensive performance, is the best capacitor, not only in the conventional conditions than ceramic, aluminum, film and other capacitors smaller, high capacity, functional stability, and in many of the other capacitors can not be qualified under the severe conditions of normal work. Widely used in high-frequency filter like Hi-Fi system.

Three Inductance

Common packages: 0402, 0603, 0805, 1206

Package accuracy Q Value frequency (HZ) allowable current (A)

0402±0.1NH 3 100 455

0405±0.2NH 5 25.2 350,315

0603±0.3NH 10 25 280,210

1005±3% 20 10 200

1608±5% 25 7.96 150

Four Magnetic beads: Large magnetoresistive, designed for filtering.

1) Chip Bead Package Permissible current (MA) accuracy

0402,0603 3500

1005,1210 1500±5?

1608,2012 500±10?

201209 260±25%

321825 210

2) The resistance of magnetic beads is generally 10? -2000 frequency is around 100HZ.

According to function can be divided into rectifier diode Schottky diode regulator diode

Five Standard package for SMD diodes:

Package name corresponding dimensions (imperial units)

SMA <---------------->2010

SMB <---------------->2114

SMC <---------------->3220

SOD123 <---------------->1206

SOD323 <---------------->0805

SOD523 <---------------->0603

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Common SMD resistors, capacitors, inductors package