• Categories:Industry News
• Author:Becky Su
• Origin:
• Time of issue:2023-06-08 09:43
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(Summary description)SMT component types During the SMT production process, employees are exposed to more than a hundred different components and it is very useful to know them in order to work without or with less errors. Nowadays, with the spread of SMT technology, almost all kinds of electronic components are available in SMT packages. The most used electronic components in our company are resistors (R-resistor), capacitors (C-capacitor) (capacitors also include ceramic capacitors - C/C, tantalum capacitors - T/C, electrolytic capacitors - E/C), diodes (D-diode), voltage regulators diodes (ZD), triodes (Q-transistor), varistors (VR), inductive coils (L), transformers (T), transmitters (MIC), receivers (RX), integrated circuits (IC), speakers (SPK), crystal oscillators (XL), etc., which in SMT we can divide into the following categories: Resistors-RESISTOR Capacitors-CAPACITOR Diodes-DIODE Triodes-TRANSISTOR      Plugs-CONNECTOR Inductors-COIL Integrated blocks-IC Buttons-SWITCH etc. (a) Resistance 1. Unit: 1Ω=1×10-3 KΩ=1×10-6MΩ 2. Specifications: defined by the length and width of the component. There are 1005 (0402), 1608 (0603), 2012 (0805)          3216 (1206), etc. 3. The method of expression: 2R2=2.2Ω 1K5=1.5KΩ 2M5=2.5MΩ 103J=10×103Ω=10KΩ 1002F=100×102Ω=10KΩ (F, J refers to the error, F refers to ±1% precision resistance, J is ±5% of the ordinary resistance, F performance than the performance of J). Resistors are marked with numbers on top except 1005, which represents the capacity of the resistor. (ii) Capacitance: including ceramic capacitor - C/C, tantalum capacitor - T/C, electrolytic capacitor - E/C 1. Unit: 1PF = 1×10-3 NF = 1×10-6UF = 1×10-9MF = 1×10-12F   2. Specifications: defined by the length and width of the component, 1005 (0402), 1608 (0603), 2012 (0805)          3216 (1206), etc. 4. Tabular method:         103K=10×103PF=10NF 104Z=10×104PF=100NF 0R5=0.5PF    Note: electrolytic capacitors and tantalum capacitors are directional, white indicates the "+" pole. (iii) Diodes:      There are rectifier diodes, voltage regulator diodes and light emitting diodes. Diodes are directional and their positive and negative poles can be tested with a       Multimeter to test. (iv) Integrated blocks: (IC) There are SOP, SOJ, QFP, PLCC (v) Inductance: Unit: 1H = 103MH = 106UH = 109NH Expressed as: R68J=680NH 068J=68NH 101J=100UH 1R0=1UH 150K=15UH J and K refer to the error, the accuracy value is the same as the capacitor.