Rectifier Diode For Battery Charger Free International Shipping

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Rectifier Diode For Battery Charger Free International Shipping

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Even sealed lead acids (Absorbed glass mat) will have a slightly different float charge which is critical to pack life.

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Yesterday I started tinkering on an old 12v battery charger i picked up in a pile of stuff from an auction.

As soon as I opened it up, I noticed corroded connections and melted wires.

I started replacing them with copper (rather than the aluminum it had) and upped it to 18g.

The bottom pair are intact with a small black resistor and the top two are not there with some black arc noted on the plate.

Any tips Ill post some more photos of the unit when I get a second.

I would tell you what you want to know if I could mum, but I be a cat and no cat anywhere ever gave anyone a straight answer, har har.

Where you can see the clips attached to the new wiring, that is where this little black piece goes - Ill draw an arrow on it.

There is writing on the side of it: It has the Motorola symbol - then 1504T1E27 Hope this helps.

I apologize its blurry - old school Blackberry.

How do I determine what size of diode they are And yes, 4 of them.

From what little I can recall theyre called disc diodes, and the thing on the outside is probably not part of the diode package but an insulator.

Youll want to replace all four no question, the form factor of the replacement diodes is kind of important because those types of diodes are very closely physically linked to the chassis so they basically use the housing as a heat sink.

If you use a radial diode or TO220 type package heat sinking becomes important.

These are what ive used as replacement in small battery chargers.

Obviuously its crude, but thats all you need for a manual battery charger, and new ones today would be similar (if a little less antiquated).

I assume that I can basically override that whole steel plate and just connect the 4 wires to this Thanks for all of your help.

If I cant track this down, then Ill maybe tear apart an old alternator Thanks again.

A battery charger basically consists of three items: 1) A transformer.

A rectifier. 3) A current limiter.

Its the third which is vague - it could be an actual physical resistor, it could be a specially would and designed transformer, it could be the special rectifier (metal plate), it could be the wiring between them (one reason for thin aluminium wiring - which only seems to be used in the USA).

Replacing the wiring with thicker copper, and the rectifier with a modern silicon one, could remove any current limiting features.