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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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195 views

Usefull 0402 and 0603 solderbridge footprints compatible with machine manufacturing?

I am currently in process of my eagle library cleanup, and came up with the idea to create a footprint similar to the one from nucleo boards. Those pads are meant to be easily bridged by just solder ...
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38 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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1answer
191 views

SMD identification SOT23 “t” “7” symbol

I tried to identify the component marked with "t 30" the SOT23 package. I looked for the "t" of "7" symbol in this list and also tried smd marking search engine but couldn't find it.
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1answer
114 views

RF limiter for -20dbm

I am working on a receiver in which I would like to limit the RF power at input to -10dBm to -20dBm, the receiver is working for frequency 1GHz. I Have checked pin diode limiters and shottkey diode ...
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1answer
135 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
43 views

Is there a popular footprint for right angle SMT LEDs?

I am designing a PCB with SMT LEDs at the edges. The LEDs have to be right-angle type (ie. shine sideways). With regular LEDs I can use an 0805 or 0603 footprint and tell the assembly house to place ...
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1answer
39 views

What is this UP 4B2 smd chip in dfn8 case?

Acts probably as a driver to power the motor. There a two of this kind on the board. One burned, the train drives only in one direction.
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1answer
405 views

How to find SMD transistors library for Altium Designer?

I am new in PCB design, so excuse me if this is a bad question! I know the basic electronics and how to draw schematics in Altium. But about SMD parts, I am a little confused! How can I find SMD ...
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1answer
86 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
144 views

What type of 2x15 pcb connector is this (from radio)

Sorry, I know this is a tedious question (and I apologize for the poor picture quality in advance), but I'm trying to find a male and female connector identical to the follow: Male and Female PCB ...
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1answer
31 views

S-PFQP-G80 package

I am having some troubles soldering a S-PFQP-G80 package since I get solder bridges between pins after putting it into the reflow oven and I was wondering it would make sense to decrease the pad ...
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1answer
341 views

What's the min space between exposed via pad to exposed component pad during reflow?

In my opinion, the solder will not run into the via as long as there is a reliable soldermask web between them. Is that right? As I know, PCB manufacturers change gerbers all the time to make the ...
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0answers
22 views

7030 SMD LED pad configuration

I have not done a lot of work with SMD LEDs and have a question about pad layout. I have done quite a bit of research and haven't found much helpful info yet. I am working with 7030 SMD leds ...
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0answers
144 views

Different balun configurations

I am looking for a balun to be used as a single-ended to differential converter, 1:2 impedance ratio, including range 1.5-2.5GHz, SMT and phase balance as good as possible (and return loss). Center ...
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0answers
123 views

I'm trying to identify this SMD

I'm trying to repair Black and Decker Thermal Leak Detector. I was testing the 9v input from the battery when I notices the chip was cracked. I'm thinking it is a transistor, but I haven't been able ...
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0answers
103 views

Potting a board with SMTs

I am trying to find the correct potting compound for a device that will sit on top of lead acid batteries. It will have SMTs, and we would like it to tolerate temperatures as low as -40. Because of ...
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0answers
69 views

How much of a surface mount PIN diode is semiconductor?

The problem: manufacturers provide a lot of information on the operation and characteristics of the devices, but not on what's inside. I'm trying to incorporate the effects of a surface mount PIN ...
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41 views

Identifying 6 pin SMD 23ALB7

I need some help identifying these SMD . 23ALB7 with 6 pins. They are found on a laptop TOSHIBA SATELITE L650.
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0answers
130 views

Self Resonant Frequency VS Package Size for capacitor

In general belief, smaller capacitors have better charactristic(more capacitive behaviour) in high frequency than bulky capacitors. On contrary in one of my RF project (8.5GHz - 9.5GHz) when checking ...
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100 views

Mystery component

I have this SMD component that popped. I cant seem to identify it properly. Could you please help? I tried to look it up, but had no luck. It is a led driver board.
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289 views

Identifying a SMD component

I have problem with identifying a SMD component. This component is a part of automotive module. It has 2 pins. One of the pins is attached to Vcc 12 V, and the other is attached to the circuit ...
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0answers
239 views

Thru-Hole Works, SMD Does not

I have been working on migrating a through-hole circuit design that works to a surface mount version. It is a preamp designed by an engineer named Ritter. Here is his schematic: www.ciphersbyritter....
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56 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?
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0answers
61 views

Need help decoding part number for SOT23-5 chip

I have a circuit board that has come out of a smart plug-in lamp dimmer/switch module. I would like to find the part number of a small SOT23-5 integrated circuit chip that is on this board. The SMT ...
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0answers
10 views

Replacement of DMP2215L P-Channel MOSFET with AO3401 from Alpha & Omega

I want to replace a faulty Diodes DMP2215L SOT23 p-channel MOSFET https://www.diodes.com/assets/Datasheets/ds31125.pdf with the p-channel AO3401 MOSFET from Alpha & Omega http://www.aosmd.com/pdfs/...
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28 views

Antenna formed from the RF module shielding wall and cover

Can anyone provide details how an antenna can be designed from RF module shielding wall or cover? More specifically if any company is making this kind of antenna product for general communication or ...
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0answers
27 views

SMD IC identification - AGQ6NA

I'm trying to repair a Yamaha LED headlight. The panel has SOIC-10 ICs with AGQ6NA marking and no manufacturer info. They are probably boost or buck-boost converter controllers, they drive PJD25N06A ...
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37 views

SMD Detector Microswitch Replacement

One of my son's toys stopped working and I decided to jump in to see what was causing the problem. I found that a number of the smaller detector microswitches had their tabs broken off. Therefore ...
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0answers
43 views

Looking for a ribbon cable with this connector

I’m trying to identify this connector to buy or build an extension ribbon cable for it, but there are no identifying markers on either side of the connector. It is for a small camera component. Any ...
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0answers
52 views

What is the type of this fuse?

this is 160mA SMD fuse, what is the type of this fuse?
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0answers
52 views

How to increase SMD codes readability

is there any substance to increase the SMD codes readability when the component is very small or has a poor print on it? Some years ago I saw a video where they suggest to use alchol, but I tried ...
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0answers
88 views

Can I use SMD components or do I have to stick to through hole?

I work in a company which develops devices that need to withstand harsh environmental conditions, shocks, radiations, vibrations and whatever. Really, too many to count. In one of those devices is a ...
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0answers
36 views

Advice on connecting a Li-Po battery to SMD terminal?

I would like to connect a Li-Po battery pack with female PH connector such as the one shown below to a PCB which will use SMD devices. I have also provided the circuit diagram below and highlighted ...
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33 views

I need to identify sot-89 transistor marking “651”. And also replacing SMPS parallel mosfet

I need help with identify smd transistor with marking "651" in probably package sot-89. I am 99% sure it's pnp transistor because I measure it by my "transistor tester" and also as I drew schematics ...
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22 views

SMD A1hf component identification

When fixing a small board I encountered this part and I don't know what it is. Can anyone help? What do the dots mean on top of the letter and on the bottom? P.S it's a SOT-23
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194 views

Tape and Reel: Paper versus embossed tape

Especially for passives (such as MLCCs), I see manufacturers provide two types of tape options: paper or embossed. I see typically that embossed is a little bit more expensive. Looking at the two ...
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0answers
95 views

Please help me to identify this chip (Cheerson CX-10SE)

Can someone help me identifying one of these chips? They are from a nano drone called Cheerson CX-10SE. It is possible to control the older CX-10 with a Multiprotocol Module and a decent Transmitter....
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64 views

Need help identifying this SMD capacitor please

Need help identifying the capacitance, voltage and temperature please, can’t figure it out. The lead was broken off of one side at c77 and I need to replace it.
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0answers
102 views

Assemble a 9 * 9 * 0.05 mm steel foil and castellation PCB using standard pick and place

I have a hybrid PCB where I want to assemble a very thin steel foil on a PCB using standard pick and place SMT process. the picture below describe how the foil is like: The orange area is only hold ...
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251 views

TRRS 3.5 mm Audio Plug (male) into a printed circuit board

Have a device I'd like to plug into a headphone jack of a cell phone. Wanted to start making some more professional prototypes; print my first circuit boards, etc. I'd like to be able to implement a ...
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52 views

Transmitter design methods using 0201 SMD

I have some experience designing an IOT transmitter (315MHz/345MHz/433MHz) using 0603 SMD parts, but am considering building a transmitter for production using 0201 parts. My question is, what is a ...
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127 views

soldering 5x5x1 high power SMD LED: anode, heatsink, cathode

I've got myself a high power SMD 850 nm LED, 650 mW radiant power. I need to use this non-stop for hours at a time. So I need to solder this to a heatsink to manage the heat. I've got 4 them, actually ...
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0answers
152 views

Help decoding resonator/oscillator marking

I'm looking at a PCB for a car remote (either 314.xx or 433.xx MHz), and the resonator or oscillator (SMD, crystal? ceramic?, Japanese?) has following markings: ...
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0answers
49 views

When did they start making SMD2835 and others

i'm trying to build the chart of LED efficacy and power change over the past couple of years. does anybody know when did they start making 2835, 3528, 3014, 5630? google gives me 2015ish for 2835, ...
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0answers
44 views

THT decopling capacitor spacing from the TQFP uC's power pin

simple question - how close can the uC's power pin (TQFP pad) and a ceramic cap's PTH pin can get so the PCB fabrication process or later exploitation would not go wrong ? Some ballpark figures for ...
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48 views

Using Bead Probe in commercial production

Currently I am making a commercial product which will have two boards connected to each other. There will be top board mounted on the bottom board. The top board have surface bead probes (connection ...
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0answers
719 views

Identify a surface mount zener diode with a four digits code?

I'm reverse engineering a circuit which provides a digital signal over a single pin. It is made up of only three components, all of them surface mount. One component I assume is a zener diode. (The ...
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488 views

Magnetic connectors on a pcb

I would like to achieve something along the lines of a snap on magnetic connector in my pcb design in order set simple four bit addresses. I'd like to have four solder-jumper type pads on the board ...
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0answers
623 views

How can I connct only 2 Pad from a four pad SMD crystal?

I want to use a 12 MHz SMD crystal in my PCB layout. The crystal, which I have, this comes with 4 pads. But I need only 2 pad for connecting in my PCB layout since my schematic design is based on 2 ...
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41 views

Do I ground mounting pins and unused pins on an smd header?

I'm looking at using a MOLEX Pico smd connector (model 5037630491) on a board. The pcb (male) side of the connector has two mounting pads labeled "nail" on one of the spec drawings. Here is the more ...