Help identifying these SMT passive components - B&O ICEpower 200ASC

Question

Hi,

Whilst I was working away, my wife had a house party and got trigger happy with the hifi volume. It's blown some components on the B&O ICEpower 200ASC modules which I'd like to try and fix myself. Problem is, I'm having a hard time identifying the components...

High res pictures of the before & after are here: https://goo.gl/photos/xxS2YiMSdZsxvKh9A

Here's what I think I know about the resistor so far...

R020 Resistor - Yageo RL1218FK-070R02L (http://www.yageo.com/documents/recent/PYu-RL_521_RoHS_L_6.pdf) 1218 Package (Long side termination)

But the inductor is a mystery - I can't find an ON Semiconductor 733MX device, but as far as I can tell, it's a 1812 package, 73uH SMT inductor, but they don't seem to exist with other suppliers either

Many thanks for ANY help possible (components - not the wife...I'll sort that later)

Cheers

Gareth

johnbeetem · Accepted Answer

shabaz is correct -- it appears to be a Zener diode.

I did a Google search for "Onsemi marking 733 MX" and got this: http://www.onsemi.com/pub_link/Collateral/1SMB5.0AT3-D.PDF

According to page 3, "MX" means it's a 1SMB48AT3G 48V Zener.

shabaz · Answer

On semi do not offer inductors. The marking L201 refers to the large wound inductor just off the photo (although it is close to the on semi device). No idea what the on semi part is though - most likely a diode of some sort, e.g. schottky diode, or some other diode.

shabaz · Answer

Hi Gareth,

That is a 0.02 ohm resistor as you say, and you'll need one of the same size (since a larger one won't easily fit) due to the power requirements (which you won't know).

Basically you could just measure the dimensions and find a similar sized one. This one looks roughly the right size:

ERJC1CFR02U - PANASONIC ELECTRONIC COMPONENTS - RESISTOR, 0.02OHM, 2W, 350PPM, SMD | Farnell element14

I'd probably pick that one, it is low cost too.

Help identifying these SMT passive components - B&O ICEpower 200ASC

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