Combiner box alternate solutions [RE-wrenches]

[Rob Wills]

My Buss catalog shows type ABC to be DC rated as follows:

UL listed 0-15A

UL recognized 20-25A

DC rating is 250V up to 20A and then 125V.

DC ratings are "self certified" which should be fine for the inspectors.

==================================================
The Littlefuse 3AB is DC rated as follows:

UL listed 0-15A

UL recognized 20-30A (note the difference - if you need a 30A fuse, it must
be Littlefuse)

DC rating is 250V up to 20A and then 125V.

No mention of self certification

==================================================
Bill's comment about listed and recognized is important to understand:

Listing is for complete pieces of equipment

Recognition is for components intended to be used in (typically listed)
equipment

Regards

Rob Wills
Advanced Energy

PS We are evaluating the cost trade-offs of making string combiners with
PCBs Vs. DIN rail fuse holders and blocks in high volume manufacturing -
I'll keep you informed as to how it comes out..

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