Questions tagged [surface-mount]

Surface-Mount Technology (SMT) refers to the way components are mounted on a PCB: SMDs (Surface-Mounted Devices) have pins or contacts which lay on top of the PCB's pads, without the need for holes in the PCB.

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107 views

Have SO(P)X components 2.54mm, 1.27mm or smaller pin spacings?

I'm a bit confused about the pin spacings of SO8/SOP8. Example: in Detail 2.54 SOP8, pin spacing is 2.54mm. However, according to Small_Outline_Integrated_Circuit, fragment: Small-outline package ...
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68 views

Damaged Connector Identification

This connector got damaged while repairing a device, and I've been unable to identify it to replace it. The connector is SMD mounted with the circuit board underneath based on the image above. It is ...
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1answer
136 views

Any way to surface mounting a through-hole resistor?

I need to solder a 2W through-hole Resistor on one side of pcb, mean like smd component but this is for through-hole resistor. I google and found there is a way call ...
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2answers
71 views

How to interface with SMD pads to a custom MCU on PCB

I have a board that I want to remove the existing microcontroller and apply my own. I'll be swapping out one brand of microcontroller and putting in something completely different and so I intend to ...
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29 views

SMT marking code 81TI and TI8A

I'm not able to find device based on marking code. I search in google, distributors and manufacturers site without success. Please help to identify it. They are in 2 different, but similar dimmer ...
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1answer
70 views

I need help to identify a SMD component

I want to identify a SMD component of a Nubia Z9 MAX board (NX512JMB) In the next picture you can see the red square. A 4 PIN SMD component (or 2 PIN component, I don't know). The green square I ...
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82 views

How do I find a replacement for this SMD Zener diode?

I am attempting to repair a circuit board where this particular Zener Diode is fried. I have attempted to search for any references to Zener diodes that are marked 8•9 (and 6•8) without success. ...
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90 views

Identifying this SMD capacitor

I would like to ask you for help with identify one capacitor at photo below (can't find it). I got GTX 1080 Ti to my hand with torn out capacitor on VRM. I am looking for the identical one. Can any ...
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1answer
47 views

I need help identifying two passive SMD components from [ GoPro Hero+ ]

[ This is the bottom side of the GoPro PCB. I marked the components I need identifying. I assume they are either capacitors and/or resistors, but I need confirmation.
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66 views

What are these two smd components?

I fried these two components by plugging in the battery the wrong way. What are they? I read SMDs have an ID which helps identify them but since they are burned i cannot read the ID. If i replace them ...
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1answer
74 views

Re-soldering SMD with SMD rework station

I recently purchased a clone 858D SMD rework station and would like to get familiar with de-soldering and re-soldering SMD chips. I was able to de-solder fine, but when trying to re-solder I can't ...
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67 views

Need Help To Identify Attached SMD Component

I am trying to fix a RS485 circuit. There is 3-pin protection components on both A and B pins. The component is connected serially to the line and mid pin is grounded. There is no label on the ...
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67 views

SMD capacitor damaged - use of X2 class

I have a question about the need of the use of the X2 capacitor. I have a simple design which can be connected to AC line and I not use an X2 class capacitor but I m using an SMD capacitor from Murata ...
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46 views

Magnavox circuit board question

I have TV that just died. Magnavox 32ME402V/F7. Pretty sure it's a bad capacitor. I'm sure I found one that's bad using my ESR tester. But I have two questions. The one that's bad according to my ...
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1answer
32 views

How mount IR gas detector sensor for outdoor use

I'm in search of a Gas detector sensor for outdoor use and I've found this sensor. My only concern is how do I mount it for outdoor use as, on the datasheet, there's no information about the mounting. ...
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1answer
56 views

Aluminum SMD Capacitor replacement question

I want to replace the caps on this mainboard but I'm not sure what to replace them with. I don't know enough about capacitance and am not sure where to turn for help. Here's a picture. I don't know ...
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97 views

Surface Mount Resistor Clip?

I have a goofy idea: a user is given a PCB and a pack of surface mount metal film resistors. To configure the board's settings, the user places various combinations of resistors into several 'sockets' ...
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1answer
58 views

Component identification: SMD: 120C, F mark

What is this component? When I search on internet, I get a lot of thermal protection components, but they do not look like this. I got it as a batch from someone, so I don't know the usage. The ...
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1answer
77 views

Malfunctioning atmega32u4 split keyboard — help diagnose

I purchased this split keyboard kit called a gergo and assembled it myself. The board properly registered via usb so I flashed it with qmk which has very good support for atmega32u4 and several ...
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2k views

Ways to get SMD resistors from a strip

I'm doing some SMD hand soldering occasionally and am looking for a better way of getting SMD resistors from a strip, so their orientation is upside up and their reading is e.g. from left to right. I ...
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5answers
2k views

Thin wall to block LED light from hitting photodiode?

I'm designing a small heart rate sensor using green smd LEDs and a photodiode. The photodiode needs to measure the reflected light, and not direct light from the LEDs. The LEDs are near the perimeter ...
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7answers
2k views

Hand soldering SMD 1206 components [closed]

Because I tried to wire-solder a protoboard which failed miserable, I'm intending to order a PCB. However, to minimize the area, I want to use some SMD1206 components. I ordered some basic ones (...
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55 views

Smd Component identification

I was creating schematic from a pcb but could not understand what the component in the image is for. The name written on the component is L386. At first i thought that it is a voltage regulator like ...
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1answer
68 views

What is (was) this component at ZD102 (top left, next to powered serial connector)

Part at ZD102 is overloaded with too much current and blown. It's three legged, with two legs on the south side and 1 on the top. The left side (white in the picture) is blown and has since ...
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152 views

Why are THP 1/2W resistors bigger than 1/4W while 1206 resistors are all equal?

How come THM (through hole mounting) 1/2 W resistors are bigger than their 1/4 W or 1/8 W counterparts, while SMD 1206 1/2 W and 1/8 W resistors are equally sized?
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34 views

help identify the SMD AK1629

Failed DVR Suspect that burned down this detail:prozvanivatsya short circuit in both sides can't understand which part to replace?
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1answer
73 views

Trying to attach resistor to MacBook logic board (a1278, 820-3115-b)

On my logic board, I knocked off a loose resistor when I was replacing my battery. The resistor was r6700, which is located right at the edge of the board and its function is to detect headphones. So ...
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1answer
91 views

SMD transistor die vs DIP transistor die [closed]

Is the die of SMD transistors different from die of DIP transistors with a unique part number? Is the power transmission of a transistor dependent on its package type or chip type ?
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43 views

Figuring out Inductance

I am trying to figure out the Inductance used on this PCB. I know it's value but need to understand what type of inductor it is and other things so I can order it. The code on it ...
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2answers
55 views

SMD Device and manufacturer ID markings S2

I have a SMD device that I am am trying to identify. Can anyone point me to a manufacturer? Probably a resistor but I am not sure. Any help would be appreciated. The scale bar in the picture is not ...
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1answer
57 views

Board soldered airtight capsule

Mechanical Engineer here, not an EE. I have some environmental sensors that need to be a part of a flow path. It occurred to me that it might be possible to have a metal "can" that sealed to the ...
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1answer
68 views

30 Meter in series LED SMD 5050 60 led/m 12v RGBW

I want to run 30 meter Led length in series in a room on the ceiling. LED specifications (according to the supplier:) LED Type: 5050 RGBW LED Light Strip Quantity: 60 LEDs / Meter Working Input ...
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1answer
63 views

Surface Mount Adapter PCB With Castellated Holes

I have some prototype boards that I would like to modify. The modification includes removing a section of circuit and replacing it with another circuit. My theory on how to do this is to make an ...
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2answers
92 views

003V SOT23-6 What is this component

This IC produces 29.6 kHz square wave and there is no external components. What it can be? I looked at all codes and I can’t find it.
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1answer
19 views

Does the 969973-3 SMD receptacle need mounting holes?

I am designing a board that uses a 969973-3 wire-to-board receptacle. In its drawing there are specified six 1.2 mm (mounting?) holes. Does anybody know what are they used for? I've seen pictures ...
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7answers
4k views

What is this SMD component, marked as D7 with an underline?

I'm trying to identify the SMD component (marked as D7 with an underline) on a circuit board of an ARGB LED controller. I think it is a diode or resistor, but I'm not sure about it. Please can I get ...
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2answers
190 views

What is this component? Marked R5

Edited: Added more pictures. I'm reverse engineering a PCB but I'm stuck at one component. I can't find out what it is. I thought it is a diode because of the marking on top of it but when I test it ...
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1answer
103 views

Please help to identify SMD diode

The markings are: 1112 1Z The package is 2010 (5025 metric). Any clues will be much appreciated. Apparently it is located right at the 12V input. On DMM / ...
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2answers
123 views

SMD desoldering - struggling to get this chip quik stuff working, what am I doing wrong?

So I have to replace a SMD connector, and although i do have soldering experience, it's all with THT. I watched like 10 different YouTube videos on chip quik, and they all made it look so easy, so i ...
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32 views

how fine is fine pitch technology in SMT - is it still below 0.635mm (25mils)?

with lots of components going much smaller these days, is there any amendment in IPC for the definition of Fine Pitch Technology for SMT?
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173 views

How to identify SMD device marked LEFBV?

I have a SOT23-3 component marked \$\underline{\textrm{L}}\,\underline{\textrm{E}}\,\overline{\textrm{F}}\,\overline{\textrm{B}}\,\textrm{V}\$ as shown in the following images: The following ...
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1answer
34 views

Help ID SMD components

I need some help correctly identifying the U9 and U10 components on the PCB. I've tried some codebooks and I found several options. For U9: H1 - X6603 is a 300mA, low quiescent, high PSRR, low noise ...
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0answers
78 views

What LED PWM controller has marking AT508CS?

I have an LED worklight with low- and strobe-functions. One click: On - full Power Two clicks: half Power Three clicks: strobe Four clicks: Off The controller is circled: No markings on the top ...
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51 views

Move part to bottom layer without mirroring in Eagle

How can I move a SMD part in Eagle to the bottom layer without using mirror? The resulting PCB should have the SMD pads on the bottom layer but mirrored (if you turn the PCB and look on it from top ...
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1answer
113 views

How to remove kapton tape from soldered parts in bulk?

I have PCBs with SMT nuts (SMTSO2060MTJ) which has been assembled onto a PCB - the nut has kapton tape on top to allow easy pickup for assembly. However, removing the kapton post reflow is proving ...
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1answer
102 views

Identifying SMD component 22P W8

I've been trying to identify a component on a main board for a TV that I believe to be faulty. As I haven't been able to come up with anything that I feel confident about, I'm hoping to get some ...
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1answer
80 views

Query regarding unknown component

Hi guys I'm very new to this field and I'm having a problem with my sound devices 664 recorder. There's a faulty component and it needs to be replaced. I couldn't find the component here in the local ...
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0answers
67 views

1st KiCad design. Concerns with an abnormal circuit

I just wanted some input before sending this off for manufacture. It is for a test fixture and just has a funny circuit. Even though it seems relatively straight forward, it took a bit of finagling. ...
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1answer
153 views

SMD LED: How to calculate optical power (in mW) from luminous intensity (in mcd)?

I chose an LED for my application but I need optical power, in mW. In the data sheet, luminous intensity is shown in mcd but I did not find formulas for calculation although there are graphs, etc. ...
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1answer
438 views

KV7RF SMD Datasheet

Can someone identify a 5-Pin IC SMD with the marking code KV7RF? Searching in Google I didn't find anything. Any help on this?