2018年12月26日 · If you need to hand solder them, I suggest not going too small,e specially if you do not have any experience. 0603 should be fine for almost everyone, 0805 even more so, 1206 is a huge beast you can solder with your hands tied and your eyes closed. As usual, if you have doubts always refer to the manufacturer datasheet.

2011年4月27日 · As for you query about the 0805 resistor versus the 0805 capacitor, I suspect that the footprints have been designed to best attach the parts; while they are fairly similar in the horizontal plane, capacitors do tend to be slightly higher so maybe the differences in the footprints take this into account.

2014年11月24日 · I think (based on prices and availability) 0603 is a better choice for the future, and use 0805/1206 or bigger where necessary. 0603 is pretty easy to solder by hand and any assembly house can handle it with high yield. 0402 is a bit cheaper for bypass capacitors in typical sizes if you don't mind the 10K per reel granularity of buying by the reel.

2019年11月15日 · In this case, I'd choose 1206 for an uncrowded board, simply because it's easier on my old eyes. If the board is crowded, I'd choose 0805, or even smaller, to save space. The other answers have demonstrated that there is …

2017年11月8日 · I recently got confronted with the question what peak/pulse power a standard 0805 thick film resistor can withstand. Background: We are designing a 2kW bidirectional DCDC converter. The Primary side is fed by a 3-phase generator/motor (rectified and smoothed) with 180V DC, the secondary side is connected to a 28V battery.

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2017年5月12日 · We have specified some 0805 resistors to be 0.2ppm/C. On some boards/batches these are green. On others more "normal" looking. We specified Vishay. Is there some color code that indicates ultra-precision packages? We have noticed different temperature sensitivity between the boards

2015年1月26日 · RESC2012X70 - 0805 @ 0.7mm high. Pads 1.39 x 1.04 mm, centres 1.9mm (gap 0.86mm); LEDC2012X120 - 0805 @ 1.2mm high. Pads 0.99 x 0.94 mm, centres 1.8mm (gap 0.86mm). Now have a flick through some datasheets for 0805 resistors (or any other 0805 component) from different manufacturers and see how many fit one of the above specs …

2018年3月25日 · Inductance is also slightly higher for larger packages, but this also depends a lot on mounting inductance (ie, pcb, stackup and vias). In your case, you're not decoupling a huge CPU with 50 caps around, so layout is a lot more important than the difference between 0603 and 0805. EDIT -- Peter says: I find Kemet K-Sim very useful: ksim.kemet.com

But over 1 minute an 0805 will heat up to over 150 degree C, which is usually the maximum temperature. This have a huge detrimental effect on its reliability. The best solution is to use a part rated for more than 175mW, such as a 1206 sized resistor rated at 250mW, or two 0805's connected in series or parallel.