Help identify chip MITSUBISHI ELECTRIC Air-Conditioner Network system

[sikocan]

Looking for a component labelled 56 on top 59 on bottom. It's from a MITSUBISHI ELECTRIC Air-Conditioner Network system. Thanks!

[R_J]

Re: Help identify chip MITSUBISHI ELECTRIC Air-Conditioner Network system

They seem to be Renesas Technology RD56P-T1-AZ zener diode

[sikocan]

Re: Help identify chip MITSUBISHI ELECTRIC Air-Conditioner Network system

How do you know? I'll see if I can find them. Thanks again.

[R_J]

Re: Help identify chip MITSUBISHI ELECTRIC Air-Conditioner Network system

BZV49-C56 could be a replacement, check the datasheet and see if it matches, Pins 1 & 3 are likely connected together
The part is obsolete but I found a case style used on there lower voltage zeners that has pin1 NC

[stj]

Re: Help identify chip MITSUBISHI ELECTRIC Air-Conditioner Network system

it's there for protection, find out why it blew up first.

[sikocan]

Re: Help identify chip MITSUBISHI ELECTRIC Air-Conditioner Network system

The guy plugged in AC instead of DC. The diodes did their job I guess.