Actions
Forum Thread Details
  • Replies 21 replies
  • Subscribers 316 subscribers
  • Views 3769 views
  • Users 0 members are here
Related
See a helpful answer?

Be sure to click 'more' and select 'suggest as answer'!

If you're the thread creator, be sure to click 'more' then 'Verify as Answer'!

Using TVS Diode P6KE across relay coil but then also relay coil is getting damaged.

Former Member

We are using TVS diode across 24V DC-100AMPs relay for automotive application but my relay coil is getting damaged.

Parents

  • I'm with lucie tozer.  I think you've got a heating problem caused by peaks in the alternator output.

    You say the relay operates 3 hours with no load, but was that on a lab supply, or on the alternator?

    Stick a scope on there and have a look at the coil volts.  I can't think of a way the load could directly damage the coil.

    Once you know what the waveform looks like, you can send it to the manufacturer for help.

    A charged battery will be around 28V (you have a battery in circuit?), or a bit more, so a 30V diode may be a bit tight.

Reply

  • I'm with lucie tozer.  I think you've got a heating problem caused by peaks in the alternator output.

    You say the relay operates 3 hours with no load, but was that on a lab supply, or on the alternator?

    Stick a scope on there and have a look at the coil volts.  I can't think of a way the load could directly damage the coil.

    Once you know what the waveform looks like, you can send it to the manufacturer for help.

    A charged battery will be around 28V (you have a battery in circuit?), or a bit more, so a 30V diode may be a bit tight.

Children
No Data