Cases and markings on SMD diodes and zener diodes
Title: led 
If you look at the modern electronic device, it’s probably cleared up that the radio element looks completely different from the equipment, it was made before 25-30 years. Conventional transistors, diodes and microcircuits, replacing parts with the size of a shield head, soldering exactly burnt out on a scarf. Takiva parts, called SMD, are like two drops of water. How can we distinguish one thing from another, and let us analyze the form and purpose of hatred? Today we are talking about SMD diodes, Zener diodes and tyahnoto markrane and in a while we will teach you how to distinguish one type of device from another.
containment: 1. What e SMD 2. Cases from SMD elements 3. SMD semiconductor marking
What e SMD
First of all, what is the meaning of "SMD" and where did the strange name come from? A lot of things are simple: a common abbreviation for Surface Mounted Device, which means a device that is mounted on a surface.
SMD diode (free), transistor and SMD LED
That is, for the difference from the conventional radio component, chiito scratches sa in a dupkit on a printed scarf and drinking from a friend's country, the smd device is just all right on top of the contact substrate, provide on a scarf and all drinking from a different country.
Fragments from the board, smd technology
The technology for surface installation is not the only way to paint it on the size on the element and the density on the element on the board, but also significantly simplify the installation itself, with some robots they can forestry and do it all. The machine applies an electronic component to the desired area on a scarf, soiling the area with IR bright light or laser to a temperature on the topen on the top of the substrate, apply the paste for soldering and dismantling elements.
Robot behind smd installation back kjm sdzharzhanieto ↑
Cases from SMD elements
Semiconductors for surface mounting are offered in various types of packages. Behind diode and core diode diodes are the main ones: metal-glass are cylindrical and plastic (ceramic) are right-handed.
SMD semiconductors in various types of packaging
By the way, let's standardize on SMD semiconductor packages, depending on the type.
Dimension SMD semiconductors from metal-to-glass
Scoop type Total length, mm Width on contact substrate, mm Diameter, mmDO-213AA (SOD80) 3.50.481.65 )3.50.31.6SOD80C3.60.31 .52SOD873.50.32.05
Dimension SMD semiconductors in plastics and ceramics
Scoop type Length with cables, mm
Length without conclusions, mm
Width, mm Vysochina, mm Initial width, mm DO-215AA6.24.33.62.32.05DO-215AB9.96.855.92.33.0DO-215AC6.14.32.62.41.4DO-215BA6.24.452.62.951.3ESC1.61.20.80.60.3SOD-1233.72.71.55 1.350.6SOD-1232.51.71.251 .00.3SSC2.11.30.80.80.3SMA5.24.12.6–1.7SMB5.44.33.6–2.3SMC7.956.85.9–3.3
What does it mean to reduce the lightness of SMD diodes (LED), it’s all the more simple. Realize the size on these devices will dissuade the technical standard size. For example, SMD 2835 LED Ima format on the right-hand side with a size of 2.8 x 3.5 mm and 5050 - 5 x 5 mm.
Realize the size on SMD diode, emit light, dissuade on tyahnoto designation back kjm sdzharzhanieto ↑
SMD semiconductor marking
It may be different, but in the event of a change, the size of the device can be standard with completely different characteristics. How can you determine what is in the rzete vie? For this, one or another marking has been used, for some reason it has been put on top of the device.
diodei
SMD diodes in a cylindrical shape are equipped with color coding - marking with one or two flowers of ivitsa, located on the conductor on the cathode.
Imported color coded tableSMD diodes in a cylindrical body
Device typeBlossom on markran *BAS32, BAS45, BAV105, LL4148, 50, 51.53, LL4448, BB241, BB249BlackLL4148, LL914Black&CaffeeLL4150, BB219Black&OrangeLL300Caffe&GreenLL4448Caffe&BlackBA682Black BA683Red and orangeBA423LRed and greenLL600Red and redLL3595Orange and yellowBZV55, BZV80, BZV8yellow
* - mark the tape location close to the cathodium conductor
The marking is similar for the diode in the right case:
Color coding SMD diodes in SOD-123 packages
Diode type Blossom on markran * BA620, BB620chervenBA619, BB619yellowBA585greenBA582, 583, 584sinBA512, 515, BB515, 811white
* - the marking tape is located close to the cathodium conductor
Some manufacturers will attach symbolic or digital markings to their devices.
Symbolic marking SMD diodes, including Schottky diodes
Diode type MarkiraneBAS16JU / A6BAS21JsBAV70JJ / A4BAV99JK; JE; ABAW56JD; A1BAT54S1L44BAT54C1L43BAV23SL31
semiconductors
Most manufacturers enclose a few diodes in a single housing. Tova is not just painted on the size of the design, but also simple installation. These devices are called SMD mounts. Depending on the type and purpose of the SMD, a single installation can and all consist of a lot of different semiconductors: from two to a few tens and they can be connected one by one or the other starts in the same SMD module.
For example, a lot of things have been crossed with two Schottky diodes, using current converters in pulses - anode or cathode. Not a little popular is preparing SMD bridge rectifiers, consisting of four semiconductors. Similar to a conventional diode, fold the label back accordingly.
BAV70 dual diode SMD mount and bridgeDB107GS— vnshen view and tyahnata electric circuit
Such SMD devices are produced in SOT, TSOP SSOP packages and may and may have different types of harassment, depending on the type of semiconductor and the bad circuit on the connection. In the valley, we will mark the most popular sglobs.
Semiconductor marking and mounting on Hewlett Packard SMD
#pinoutSjstav on sglobyavane Scoop type 2D1i2 diode series SOT233D1j2 diode common anode SOT234D1h2 diode common cathode SOT235D6d2 diode SOT1437D6c4 diode connected to the wall SOT1438D6a diode bridge SOT143СD2b2 diode SOT323ЕD2c2 diode common anode SOT323ФD2d 2 diodes common cathode SOT323КD7b2 diode SOT363ЛD7f3 diode SOT363MD7g4 diode common cathode SOT363нD7h4 diode common anode SOT363ПD7i diode bridge SOT363РD7j4 diode, wired into the wall SOT363
Marker on semiconductors and SMD modules in SOT23 and SOT323 packages
Device type MarkiraneSjstav on sglobyavaneKadarBAV70JJ / A42 diodes SOT23BAV99JK, JE, A7BAW56JD, A1BAT54SL442 Schottky BAT54CL43BAV70WA42 diodes SOT323BAV99WA7BAW56WA1BAT54AW422 Schottky BAT54CW43BAT54SW44
Before marking the top of the housing on the device, imam mounting the BAT54S from semiconductor to Schottky.
Zener and Diodi
Zenerite diodes and diodes can and imat are somehow colored, such is the symbolic marking:
Color coding SMD zener and diodes in a glass cylindrical case
Zener type diode Blossom on markran *BAV105, BB240Green BAV100Green and black BAV101Green and coffee BAV102Green and red BAV103Green and orangeBAS81, 82, 83, 85, 86SivBB219ByalaBB215Byala and green
* - mark the tape location close to the cathodium conductor
Symbolic marking SMD Zener diodes BZX84 in right-hand housing
Device type Markirane Stabilizing voltage, V BZX84C2V7W42.7BZX84C3V0W53.0BZX84C3V3W63.3BZX84C3V9W83.9BZX84C4V3Z04.3BZX84C4V7Z14.7BZX84C5V1Z25.1BZX84C5V6Z35.6BZX84C6V2Z 46.2BZX84C6V8Z56.8BZX84C7V5Z67.5BZX84C8V2Z78.2BZX84C9V1Z89.1BZX84C10Z910.0BZX84C12Y212.0BZX84C15Y415.0BZX84C18Y618.0BZX84C2 0Y820.0
Symbolic marking SMD Zener diodes BZT52 in right-hand housing
Device type Markirane Stabilizing voltage, V BZT52C3V3SW43.3BZT52C3V9SW63.9BZT52C4V3SW74.3BZT52C4V7SW84.7BZT52C5V1SW95.1BZT52C6V8SWB6.8
led
Marking at the top of the SMD LED usually does not put it all (the exception can be fake - it’s worth marking for the sake of being convincing), but the digital designation speaks to them for the size of the device itself. Other information may be included in the documentation, provided with SMD LEDs, or from a tabelata, which I’ll give you a little more:
Key Features SMD LEDs from various types
Device type Power, W Svetlinen stream, lm Dimension, mm 0.2292.8 x 3.52835 (b); x 2.03020 (b) 0.53.0 x 2.03020 (c) 11253.0 x 2.030300.9110-1203.0 x 3.0; 322811103.2 x 2.832580.263.2 x 5.83528 (a) 0.0673.5 х 2.83528 (b) 11103.5 х 2.83535 (а) 0.535-423.5 х 3.53535 (b) 11103.5 х 3.53535 (c) 23.5 х 3.540140.222-324.0 x 1.440200.5554.0 x 2.050500.214-225.0 x 5.050600.2265.0 x 6.056300.530-455.6 x 3.057300.530-455.7 x 3.057330.535-505.7 x 3, 357360.540-555 .7 x 3.67014 (a) 0.535-497.0 x 1.47014 (b) 11107.0 x 1.4702011107.0 x 2.070200.540-557.0 x 2.0703011107.0 x 3.08520 (a )0.555-608.5 x 2.08520 (b) 11108.5 x 2.0
As you can see from the tabelat, the device 2835 can be produced in three modifications - 0.2, 0.5 and 1 W. dolu in kutia sas is standard size 2835.And for yes, the falsification is persuasive, somehow pisah in grief, fraudsters dory can and lay down etiquette! It is not possible to determine either visually, or by standard size, how to truly imate in the calculation of si. Tova can become very friendly documentation and approximately at a price - bells and whistles, little sensible power on LED.
But the product is not everything. LED lights are standard size and can have different colors and temperatures and dory colors. For the case of 2835, light-colored can be fuel, prez day and studen, and for example SMD 3020 can be bright from any kind of shine.
The 5050 product is equipped with three crystals, put in a single package, which may vary from typography to radiance. Tsyalata tazi information is in friendly documentation.
5050 tri-crystal LED and LED strip, top-mounted tri-color SMD 5050
Such a conversation is about SMD semiconductors and tyahnoto markrane adventure. Now you know how and what is necessary, you can determine the type of SMD diode, Zener diode or LED, someone keep it in check through the marking.
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