------Question for 2903717 Please Put your question below------
Hi, wondering what the max current allowed for this block is? I see 15A but assume that is per pole, guessing each pole outputting 15A would exceed the rating? For my scenario I will need 2.5A per pole, is this okay? Thanks
Hello denver.cohen,
For part number 2903717, The 15A max current is per pole. It says on the manufacturer website the max current is 30A
Hi denver.cohen,
Well, the documentation is a little hard to interpret, as it refers to poles, branches, and distribution terminal blocks.
And, it gives several current ratings, including a “Max. current carrying capacity per branch” of 15A, a “Max. total current of all branches” of 30A (per potential), and for CSAus rating - 12A input or output.
From all of this, I would say that if you require it to be CSAus approved, you are limited to 12A for any terminal or 15A if not required, and that on either of the busses, the max current is 30A.
Therefore, 2.5A on any terminal is well under any limits of the part.
Ah ok thanks for the input. But if i input 2.5A on each pole that would exceed the limits for this block right? Are there alternate terminal blocks that can handle max current of 100A?
Correct, that would exceed the rating by a significant margin.
So, do you need 40 terminals, each carrying 2.5A?
For this test case, I have 44 5A loads that I want to condense into a thicker gauge wire that then terminates into an e load. the 5A loads are split into 2 wires, each carrying 2.5A each.
Am I missing something? 44 x 5A = 220A
Correct haha, the thought was to break it out into several terminal blocks, but if this is 30A max i dont want to get 8 of them. Wondering if theres a better PN to get so I only need to order like 2 or 3
Well, on the 2903717, my interpretation of the specs are that it has two 30A busses, so the whole unit can handle 60A altogether.
That still would require 4 units, but that’s better than 8. I’ll see what else we might have.
So, does this have to be DIN rail mounted?
Do the connections have to be typical terminal block-type connections?
Thank you! DIN rail is preferred, terminal block connections perferred but if theres a different solution I can work around that.
And just to clarify, how many inputs/outputs do you need? Is it 88 inputs or 44?
there should be 88
About the only other thing I have come across is the 2972136, but it looks like you’d still need three of them, they are much more pricey, and I think availability might be more of an issue with them.
Hi denver.cohen,
I came across a couple other very similar options which would save a bit of space relative to the 2903717. They are from the same family, but physically smaller, with fewer terminals. They both have two 30A busses and have 12 terminals per bus, which would give you 24 contacts for a total of 60A. Four of these would also meet your 220A load requirement and offer a total of 96 terminals.
The spring terminal type costs a bit more, but is a better choice if it is to be used in a high-vibration type of environment because there are no screws to potentially back off over time.