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Does any one know what this (automotive thing) is ?

michaelkellett 8 months ago

A friend (who mends agricultural machinery) has asked me.

MKI

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robogary 8 months ago +2

back to back schottkey diode used for voltage suppression https://www.electronicshub.org/types-of-diodes/ 12. Transient Voltage Suppression Diode In semiconductor devices, transients will occur due…
michaelkellett 8 months ago in reply to shabaz +2

Hello, It's wired across the battery supply between the alternator and the battery. The symbol is for a 14.5 V bidirectional transient suppressor (what I call a "transorb"). It makes sense. If…
colporteur 8 months ago in reply to robogary +1

Wow great reference link.

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kmikemoo 8 months ago

I'm going with a Transient Voltage Surge Suppressor. Probably a Zener back-to-back with a standard diode since it's on a DC circuit. Basically a crowbar circuit.
We use anti-spike diodes all the time with relay coils, right?

Varistors and MOV's are used regularly on field windings of alternators. I think javagoza is on the right path.

https://en.wikipedia.org/wiki/Transient-voltage-suppression_diode#:~:text=A%20transient%2Dvoltage%2Dsuppression%20(,spikes%20induced%20on%20connected%20wires.
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kmikemoo 8 months ago

I'm going with a Transient Voltage Surge Suppressor. Probably a Zener back-to-back with a standard diode since it's on a DC circuit. Basically a crowbar circuit.
We use anti-spike diodes all the time with relay coils, right?

Varistors and MOV's are used regularly on field windings of alternators. I think javagoza is on the right path.

https://en.wikipedia.org/wiki/Transient-voltage-suppression_diode#:~:text=A%20transient%2Dvoltage%2Dsuppression%20(,spikes%20induced%20on%20connected%20wires.
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