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    SRA Low Temperature Lead Free Solder Paste T3-15 Grams
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    SRA Soldering Products

    SRA Low Temperature Lead Free Solder Paste T3-15 Grams

    4.3
    €57,00
    €57,00
    €94,00
    Sold out
    Save 39% (€37,00)
    You can't add more than 500 quantity.

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    Description

    • This is a low temp solder paste with a no clean flux
    • Melting Point 137C 278F (Eutectic)
    • 87% Metal Particle Size 25-45 Microns
    • Protect Sensitive Parts with this low melting Lead Free Solder Sn42/Bi57/Ag1
    • This alloy is better than Sn42/Bi58 because it contains Ag which makes it stronger and less brittle
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    Customer Reviews

    this stuff is 10 months old so it may not be good anymore which is why I am giving 3 stars ...CAVEAT: this stuff is 10 months old so it may not be good anymore which is why I am giving 3 stars instead of 2.I just used this stuff to solder on a bunch of SMT parts and I have had a really bad time with having to rework the soldering job on several ICs due to bad connections. If I had known the problems I would've had I would not have attempted this. So learn from my experience and do not use this stuff at 10 months. It might be ok brand new, I bought it without having any projects to use it with and so it just sat in storage.It's back to regular leaded solder paste for me!3Dried and disgusting smell dried after a few uses. It remained with the cap all the time between uses, even though it dried up. Hard to press and dispense. After getting my hand hurt I decided to use the tip of the needle to pick a little and put it in place by hand. I ended up with that stinky paste all over my hands. 2Works well, but a little too "liquid" for me to be used with hot-airI'm not an expert in using solder paste, I'm barely a beginner.Using this with a hot air reflow station, I found it to be too liquid IMO. i.e. seem to have too much flux.So it has been easy to solder CMS components, but a huge pain to avoid using too much and when in flux phase (before the metal melts), this was too easily blown away by the hot air tool.i.e. getting perfect solders on the pins was easy, but not getting some bridges under the component (unreachable) from the liquid that was pushed by the hot air (on lowest fan setting) was tough.This was on pre-heater board (preheated to 100C).There was an easy fix: blow it away from under the chip on max air fan setting, and it nicely went to reflow on the pads (creating some bridges easily removed with desoldering braid).So overall I feel that this is a great paste for reflow in an oven / skillet than with reflow with hot-air.4BUY THIS UNLESS YOU HAVE MAD SOLDER SKILLS!!makes soldering so much easier. put the paste where you want it, use your now free hands to move the wire (one hand) and the iron (the other hand) to the paste and watch a beautiful dot of solder appear. this is so easy compared to solder wire. BUY THIS UNLESS YOU HAVE MAD SOLDER SKILLS!!5A game changerI have been using the Kester Easy Profile 256 lead solder paste for several years because it seemed to be very forgiving of the profile I have set in my homemade reflow oven. I also like no-clean solders because I don't like to have to clean my board, and the no-clean solder type actually forms a protective barrier against corrosion. I knew I needed to go lead free since I want to start selling my product in Europe. I have made some attempts in the past to go lead free, but the few pastes I have tried were not as forgiving as the Kester EP256. This SRA Low Temp solder is a game changer for me. It flowed about 40 degrees lower than the EP256. It was a bit runny as I stenciled it on to my board and the solder would run between pads causing a bridge, but once the oven comes up to temperature, the wicking action pulls the solder pretty evenly back onto the individual pins. I generally use SOIC and TSSOP size chips, but one chip on this board is MSOP with a 0.5mm pitch, and it worked pretty darn good. Only a couple bridges. This stuff just works! Sure, it leaves very tiny solder balls behind in a few spots, but every paste I have ever used does that. The solder joints were pretty shiny. Not nearly as dull as other lead free solders. My test board had lead HASL prep, so perhaps if I buy lead free HASL boards, it will be even more shiny. If I have one complaint, it would be that the product was shipped in regular mail on a day where my mailbox was easily reaching 105 degrees F in the hot sun. Most companies ship in a cold pack, but this didn't.4Great solder for SMD workUsed this for some fine-pitch SMD prototype work. The behavior of the paste is really great.I used a hot air rework station at 300C exclusively for reflow. The flux and solder both had great performance, electrically and with retaining surface area tension. 0603 devices generally held very to the pads against the force of the hot air while the solder was fluid. Fine-pitched TQFP leads had very few bridges despite some excess and sloppy paste application, and came up well with lead-free silver solder and a wick. Enough paste still held to the pads for good electrical connectivity despite being wicked.The only "con" is that the needle aperture is a little big with the syringe for very-fine SMD pitches. A nice pair of tweezers (or a toothpick) are necessary to apply small amounts of paste to pads that doesn't result in bridging. This drawback didn't merit a 4-star review since the performance of the paste is really what's important, but it would be nice to get a second, smaller needle with this product, if the viscosity will allow.Overall, highly recommended for SMD prototyping work. Would purchase again, and would recommend.5Magically goodThis stuff is magic! There's basically no other way to put it.If you've never soldered before, just slap some of this haphazardly on a circuit board, put a part on, touch a hot soldering iron (620F/320C) to the pads for just a second, and you have a perfect solder joint. It melts at a very low melting temperature, just barely higher than boiling water. As electronic components are typically designed to be soldered at much higher temperatures, this lets you try soldering them many times without damage. If heated somewhat above its melting temperature, it becomes *very* liquid - more like mercury than like the goo which molten lead-free solder usually becomes. In that form, it wets *extremely* well any clean metal surfaces, especially gold-plated (ENIG) circuit board pads, and clean surface mount components. You don't really have to get it in the right place, you just have to get it near the right place and melt it and it will wet anything metal like magic.If you *have* soldered before, this is still magic, you just have to forget most of the stuff you know. No flux; this contains its own flux which is more than good enough. You have to really rely on surface tension; you can't get solder where you want it the way you can with solder wire, but this will flow to any prepared metal surfaces (like PCB pads) very easily on its own, as long as any part of it touches the metal surface. You can also forget about cold joints; keep the iron at 300C and just a casual touch to a blob of paste melts it *and* heats everything it is in contact with well above its melting point. Put a line of this down each side of a TQFP footprint (no stencil!), put the chip down, drag an iron along the legs and you have perfect solder joints.If this is heated slowly (with a heat gun or IR reflow) there are actually 3 stages: first it slumps (goes from being like paste to being fluid, almost oily), second it dries out to a kind of gray powder, and third it melts and "super-wets". During the slump, it will cover a much bigger area than the initial placement; the edges seem to be mostly flux with little metal. That's okay, the molten metal balls up and pulls itself onto any nearby pads and components.There are obviously some kinds of circuits where this is not what you'd want; anything high power can easily heat up enough to melt the solder and have all your components kind of slide off the board. But for low-power/low-voltage stuff like microcontrollers and sensors, this is just the thing. I've done boards where just one or two parts are soldered down with high-temp paste, and everything else is this stuff. This also makes rework extremely easy, since the parts (and board) don't get heated up all that much; it's pretty easy to solder on a part with this paste, use a heat gun to desolder it, put on another part, repeat - sometimes a few dozen times with no apparent damage to either the parts or the board. Nice for prototyping :)Since I'm such a fan of low-melting solders now, I've tried other brands like ChipQuick. Their metal composition is the same, but they don't work nearly as well; the slump is much worse, and the flux is much less active so the wetting action is not as good. I think SRA specifically will always have a place in my kit. I keep running low and having to reorder; that's how much use it gets.5Great, convenient led free solder.This solder lives up to its promise. Low flow temperature makes working with delicate parts much easier and, if you have to rework something, it is far easier than if the parts were soldered using traditional high temperature led free solder.I bought this specifically because i had some tiny, delicate parts that frequently weren't surviving reflow using other led free solder paste. The results have been excellent. I'm able to reflow parts using only my board preheater. I'll be using this as a standard for rework.5This stuff is friggin' fantasticI had been using Kester R276 in my home office, with a T962A reflow oven (with the recommended modifications). It wasn't working great, and I wanted to find a lead-free solution. The R276 requires relatively high temps, and even with replacing the masking tape in the oven, it would still stink up the house, and on some boards I'd still have to hit some spots with the hot air gun after going through reflow.This SRA stuff worked great on the first board I've used it on. I was using a stencil with some relatively fine pitch QFN parts (16mil). It easily made its way through the stencil openings. I set my oven to the low-temp lead-free profile, which only gets up to about 155C, and both sides of the board came out great...far better than anything I had seen with the R276. The solder joints are all nice and shiny, and there are nice filets on everything.This is now my go-to solder paste, great stuff!5Surprisingly easy to use.I have used this stuff on many projects over the last few weeks,. both for "hot plate" SMD soldering, and for soldering iron soldering, Solder paste is one of those tools,. that once you have it in your electronics tool box you'll not know how you survived before without it. this one melts at a fairly low temp wich is good for some applications bad for others,. if your circuit is high amp,. and runs hot, say like an RC cars main motor lines,. it could potentially melt the solder,. for applications like that find a solder paste with a higher melting point,. but for most low amp projects this stuff is pure gold. Keep in fridge if you live in a hot climate to extend shelf life.5a must have This is a must have for pcb work too small or heat sensitive for iron and roll soldering. Hot air monitored with an ir temp gun indicated it melted right on time, sucked itself to the contacts, with no bridging. I've never used any other, so I have no comparison among brands, but why try another if this works exactly as described. A total lifesaver. 5Liquefies fast and spreads a bit too much...It melts at low temp, and that's a good thing.However, when used for smd soldering, as the temp increases towards melting, the paste liquefies quickly and spreads around more that I'd had hoped. It surrounds the component (think SMD resistor or capacitor) in a little puddle (I didn't use too much judging by the resulting amount of solder at joints), the flux activates, and then the microballs of solder commence to melt and aggregate in blobs at the joints. All, what you'd expect, but a certain quantity of paste's solder microballs remain around the component in the hardened flux residue. You can see it with appropriate magnification. Maybe it's just fine -- I'm not very experienced to be confident enough in this judgement, but to be safe, everytime I scrap the excess flux residue with solder microballs inside, from around the component using a sharp point. I used it only for SMD resistors and capacitors as the mess that results deterred any attempt to use it for finer pitch components.I'll have to try a good brand, regular paste, to compare, but the instructional videos predicted a somewhat different process. Maybe my technique is at fault, maybe it's the paste...3
    SRA Low Temperature Lead Free Solder Paste T3-15 Grams

    SRA Low Temperature Lead Free Solder Paste T3-15 Grams

    4.3
    You can't add more than 500 quantity.
    €57,00
    €57,00
    €94,00
    Sold out
    Save 39% (€37,00)