I have a Panasonic microwave model nn-sa616wx sn 58100747 it keeps triping the breaker after it operates for awhile we have taken a amp reading and it draws 17.2 amp.This is a new microwave.

It is here

Panasonic nn-k123 Manuals

ManualsLib https://www.manualslib.com > ... > Microwave Oven
Manuals and User Guides for Panasonic nn-k123. We have 1 Panasonic nn-k123 manual available for free PDF download: Operating Instructions Manual ...

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Question edited for clarity, full 'MAKER model (what it is)'.
Question moved to Panasonic.

This manual is the closest 'SF' suffix.

Panasonic NN-T664SF Manuals - ManualsLib

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We have 3 Panasonic NN-T664SF manuals available for free PDF download: Operating Instructions Manual, Service Manual, Setup Manual. Panasonic NN-T664SF ...

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Panasonic Microwave - ConsumerAffairs.com

www.consumeraffairs.com > Homeowners > Microwaves

Rating: 2.6 - ‎53 votes
After looking, door was starting to arc and burn around the edges in three places, ...You can't leave this oven unattended for a minute or you could be calling 911! ... In October 2014 I purchased a Panasonic microwave model NN-SA661S. ... The timeremits "4 beeps" when the time is up; other microwaves, continue to beep ...

[PDF]operating instructions - FTP Directory Listing - Panasonic

ftp://ftp.panasonic.com/microwaveoven/.../nn-sn651_nn-sn661...

PanasonicModels no. nn-sn651b ... nn-sn661s .... Use this appliance only for its intended use as described in this manual. do ... Thank you for purchasing a Panasonic MicrowaveOven. ... you press Start. note: The Glass Tray can turn in either direction. ..... If a pad is pressed and no beep is heard, the unit did not or cannot accept the

behind the control panel,while your checking the h.v. cap check the h.v. diode for a shorted condition as this will also blow the 20 amp fuse too

There is a dead short in the microwave oven that can be any number of things, yes you will need a pro to fix this and I suggest an estimate first.

Due to the complexity of this unit I recommend the services of a qualified and authorised Panasonic service centre.

Most domestic microwave ovens draw arount 1kWatt on microwave and the same again for convection.
If it is a European country (230Volts) maximum power will be 10 Amps, 20 Amps on 110Volts.
If the breaker is an RCD type, you have an earth line fault!

Inside the external case and usually to the right left ( from Front) in some models There is a 30 amp fuse ( This may vatry on oven output amperage) Replace that and you should be back in cook mode.
Removing the case you should remember to disconnect from the power plug.

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I'm having the same problem with the same model microwave. It has taken hard use for a long time, but now it will (sometimes) start and then stop after a second or two. I think it's a loose connection, because a couple of times I got it to work by rapping on the back or side.