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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162 views

Eagle - outlines/placeholder for smd (0603)

I'm a bit new in this area, trying to make a PCB for my little project and cannot find how to make placeholders for smd components in Eagle 9.2.2. Is it possible to have/create outlines for smd (...
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Please help me identify the SMD component in the picture (or help me fix my Wacom)

Could anyone help me identify what type of SMD component the one in the red circle is? The label seems to be ID but I can't really tell very well because it's so small. My guess is that it's a diode ...
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83 views

Unclear marking on a surface mount resistor

I have this resistor on a board. Can someone can help me determine the value from the photo? I did a ohms reading, and actually just around 22k Ohm. Which cannot be right. I asked about this in a ...
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40 views

BE QM marking SMD component

Working on a board currently, but cannot find any info on what kind of component this is. I have some suspicion/intuitive feel, but I`d like to be sure. It appears to be a SOT 89 package. Anyone ...
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59 views

Identification of SMD needed please

Please can somebody help in Identifying the SMD component... Thank you AJN I have added a pic to show where the diode is located (circled in red). Thanks...
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SMD component identification - possibly BJT

I found a defective SOT-23 on a broken PCB, but can't identify it. Probably a BJT, but what kind? The one on the right seems to be the same as the blown one. I would appreciate your help.
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30 views

SOP-4 Package Footprint Standard

I've got a TCMT1102 Vishay optocoupler. Its a 4-pin SMD part but there is no standard package type associated on the datasheet - i.e SOP, SSOP, TSSOP etc. Vishay has a footprint document that ...
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1answer
118 views

Compatibility between XBEE-PRO 900 HP and XBEE SX

I wanted to use a 900 MHz xbee and I need one side to be surface mount. So I'm thinking of getting an XBEE PRO 900 HP (XBP9B-DMST-002) and an XBEE SX (XB9X-DMUS-001). These devices have the same ...
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1answer
52 views

Thick film resistors failure mode

I'm experiencing failures on thick film resistors. In a metering device which samples the mains voltage through a voltage divider formed by a series of 150K 1% 1206 SMD resistors, many of the ...
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4answers
249 views

How to connect multiple 0402 leds to an Arduino for a 1:87 model

I want to replicate lighting a 1:87 scale police car with the aid of an Arduino Pro Micro ATmega32U4 powered by a 90mAh 3.7V LiPo which is connected to a TP4056 5V Lipo battery charger which is ...
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88 views

Can anyone identify what this smd component is?

It’s on a Pentax camera lens. I know it’s made by Murata. Believe there are six terminals.
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483 views

How should I design a heat sink for an SMD power mosfet?

I really like the specs for the Infineon OptiMOSPower-Transistor IPT007N06N, but how would I keep this beast cool? Usually I use regular aluminium heat sinks (with water cooling or a fan) for MOSFETs ...
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Fine-pitch SMD pads on flex PCB using coverlay rather than soldermask

SMD: "Solder-Mask-Defined" NSMD: "Non-Solder-Mask-Defined I am making a thin flex-PCB (0.2-0.3 mm) on which I am going to mount a component which has SMD pads. I would like to also make ...
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1answer
263 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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334 views

Component identification (SMD) - Beelink X55 Ultimate

Recently my NUC has decided to release some magic smoke. I found two problematic components in it. F1 fuse, which failed (?) to protect the board and U10 which has manifested a nice eruption point. ...
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48 views

Component ID: SMD resistor(?)

tl;dr: how to procure a SMD replacement if all i know is the 3R3 marking and sizes (square 6.5mm sides, 2.9mm tall), with no extra information on thermal, etc. One component on my motherboard fried to ...
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52 views

What kind of diode is this? Marked “1934 MZ”

My drone's power distribution board heated up. There is a diode in the picture - I could not identify it. Can anyone help?
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2k views

How to tell if capacitors are damaged?

I have two identical devices, the Megger MIT525 5 kV Diagnostic Insulation Resistance Tester. One of them present this behavior: When it is charging connected to the electric network, the device turn ...
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1answer
58 views

How to identify SMD components?

I am trying to understand SMD components. Came accross ICs and seems like quite hard to hunderstand. Is there any general rule? Could someone help me to identify the ICs in the pics. One is marked as &...
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26 views

2 terminal SMD resistor marking code with Omega+F

What kind of code are the markings on the resistors in the picture? I think they write out the Omega symbol, just because there is enough space on the component and looks nice, but I was not able to ...
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1answer
168 views

Help identify these two components

I am trying to identify these components, and I couldn't find anything with just the marking. Any help is appreciated. The first picture I thought is Passive crystal/oscillator!!! This one is marked ...
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1answer
65 views

Help identify this SMD oscillator

This oscillator provides clock to an FPGA which powers the ultrahdmi mod for an N64 (https://www.retrorgb.com/ultrahdmi.html). It's clearly marked A03ZZ 1414 Clock output is diametrically opposite pin ...
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An other smd identification help

Searched a lot and didnt managed to find this smd . Any suggestion , replacement smd ? Thanks in advance. (SMD code as pic shows PH69 A 918010 ) Here is an other pic
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Are there any differences between SMD and THT inductors?

I wonder if there exist any differences in performance between chip-SMD (like 0805) inductors and THT inductors? More specifically I need to solder 10 uH 0805 SMD inductor for my bias tee module (like ...
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1answer
56 views

Trying to identify SMD component from a Ps2 Slimline

(English isn't my first language) I'm trying to fix an old Playstation 2 Slim my cousin had that was turning off by itself after 5 minutes playing. After some search on the internet, I found that it ...
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43 views

Calculate the Thermal Resistance (Junction to ambient) from Thermal Resistance (Junction to mounting base)

I have this MOSFET - MOSFET Datasheet I want to calculate the maximum junction temperature of the MOSFET part. I have calculated the power dissipation. In the MOSFET datasheet, there is only Thermal ...
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3k views

Rotary encoder to 2 buttons

Please excuse me if this question is a very obvious one, I have searched on here but my electronics knowledge is very very basic. Here's what I'm trying to do, I have taken an old Android phone ...
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34 views

Why are thin-film surface-mount resistors particularly suitable for use in cryogenic environments/conditions?

I am currently studying The Art of Electronics, third edition, by Horowitz and Hill. Appendix C.4 Resistor types says the following: The usual choices for general-purpose use are metal-film (axial-...
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3answers
80 views

Voltage drop from PCB ground plane to motor driver

Note: Feedback has been addressed and the circuit has been updated, however the same behaviour still applies I'm new to creating circuits but have designed a PCB and made it with Eagle, however, the ...
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1answer
441 views

SMD component list for capacitor

Being newbie to electronics, I'm unsure which SMD component to choose. I'm trying to build a step down voltage circuit using AMS 1117 (5 v to 3.3 v). I want to know the SMD capacitor component (...
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1answer
81 views

Identify SMD transistor - top marking BC RJ

I need to know the specifications of the transistor Q5 with top marking BC RJ
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102 views

Why is this resistor only connected on one side?

I have taken a photo against the light so you can see through the board. It seems the circled resistor is only connected on one side. My hypothesis is that there is more than one version of this ...
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1answer
87 views

What are these long gold plated SMD components on the NVidia Tesla A100?

This photo shows a NVIDIA Tesla A100 board. Please note the 4 SMD components on each side of the chip. Looks like gold plated ceramics. I have never seen components like this. Can someone identify ...
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Is there another part number for z1w47 SMT zener diode?

So I need to replace a SMT component that burnt on a board. The part number that I was able to get from the component is Z1W47. A quick google search lead me to CZ1W47. However, I can't find anyone ...
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1answer
34 views

Unknown SOT23 IC without matching code?

I'm trying to pick apart a signal conditioning board. I found a SOT23-6 package marked "4DLB" which doesn't seem to have any matching SMD code in any charts I found. I suspect it may be a ...
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1answer
38 views

SM 03 Diode Identification

I'm trying to replace a bad diode in my Chevrolet Captiva C100 rear wiper motor circuit board. The marking on the SMD diode says SM 03 and I could not cross reference the marking with the correct type ...
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1answer
64 views

Can't identify SMD component

I need to identify this SMD component, which looks like a tantalum SMD capacitor. But I can't find specs that would match the marking on a component. I hope that someone can help me.
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32 views

Replacing a hard to get BGA part with a small circuit board?

We have a production design PCB with suddenly hard to source BGA part. It could be replaced with a much easier to source device, but we'd prefer not to go back to layout and redo/reverify the board ...
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1answer
38 views

Help identifying this SMD component (IR sensor) [closed]

I have a mini differential IR sensor PCB that serves as the bed probe for my 3d printer. Looking at the SMD components, there are a few items I can not find or identify. Does anyone know the part ...
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1answer
96 views

SMD chip identification - top marking “LA” then sideways “4”

Does anybody know this chip? It gets input from a photo-resistor and triggers a solar light circuit.
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1answer
3k views

SMD transistor marking

I have a SOT-23 SMD transistor marked "2.X L" as shown in the image. I managed to find out that "2X" stands for 2N4401 and the dot seems to mean "lead free". But I couldn't find the meaning of the ...
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79 views

2004 Chevrolet Avalanche surface mount component identification

My instrument cluster stopped working and when I plug it in, I smell some burning. I found this component smoking and seems to be the source of the trouble. Can anyone please help me identify what it ...
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1answer
72 views

Looking for some help with SMD Component identification N51K

I've got a faulty GTX 1070 Graphics card here with a blown SOT-23 casing IC. Looking at it you can se N51 and looking around on the board I can find another component like it with N51K. I cannot ...
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1answer
39 views

Identify this SMT device

Can anyone tell me what are these smt devices. Especially the one with square drawn at centre
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37 views

Soldering QFP with thermal pad (but with obstructions/no vias on underside)

I will start by saying that I'm a complete newbie when it comes to soldering SMD. I've been practicing with scrap boards, and I'm getting there, but not sure how to approach this one. I am trying to ...
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1answer
70 views

Using holes instead of vias for unused through-hole pins

I'm creating a footprint, in Eagle, for a USB-C connector. The part has 16 SMD pads and 16 duplicate through-hole pins. The pins are very close to each other and the specs in the datasheet have ...
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1answer
78 views

Please help me in identifying surface mount component

So I've accidentally knocked down a computer system used to take kitchen measurements. I've caused a short in the power supply which caused two SMD components to burn in the motherboard. I've ...
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79 views

Smd resistor code= IEE

r28=iee what is meaning of iee code of smd resistor?
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1answer
77 views

Identify component (diode?) based on photo

I am currently fixing a Akai MPK Mini mk2 midi controller with a loose USB port. In addition to the USB, it is missing one part labeled as D1. It can be seen in the attached picture circled in red. I ...
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1answer
62 views

How to solder qlpf48 (or how to fix it)?

I think I'm really not so good at soldering. All places say it's it's fairly easy to hand solder LQFP ICs, but for me it isn't... On videos the tin nicely melts between the pins, and do not create ...

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