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Old 01-28-2025, 10:45 PM   #1
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DIN mounted 12V ATO fuse distribution

I'm looking for a DIN mounted unit for 12V mid ATO fuses with each output channel (fuse) capable of 20+ amps and total input 50 amps+. 10 to 12 channels (fuses).



Any suggestions?
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Old 01-29-2025, 08:18 AM   #2
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DIN mounted for 20+ amps, I think you should look at individual holders. The DIN blocks that I've seen are on a PC board and I don't like that much current on a trace.
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Old 01-29-2025, 08:53 AM   #3
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Not DIN rail mountable, but 12 Fuse 30 AMP max fuse size 100 AMP current rating:

https://www.littelfuse.com/assetdocs...7-b9bfa70d0b89

I haven't been able to find any DIN rail ATO fuseholders.

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Old 02-02-2025, 09:50 AM   #4
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Why not just use a DC distribution panel having 20/30A capability?

ATC fuses are safer than ATO fuses for boats and RVs having propane systems. Class T fuses are best for higher amperage DC requirements, especially when using low resistance LiFiPO4 batteries. And auto resetting DC circuit breakers having fire protection work well in not easy to access locations provided you understand their polarization requirements, understand how they operate if current can flow in both directions (e.g., when used in a circuit where charging/discharging occurs) and then also properly back them up with a slightly higher amperage rated fuse.

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Old 02-02-2025, 10:57 AM   #5
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I'm planning a major overhaul of the 120V and 12V systems on a 30A TT.



I was hoping to use mostly DIN mounted devices where possible in the design to avoid by consolidating as much as possible on DIN rails. Making it a cleaner solution. I had already found the same fuse panel and considered adapting it with universal DIN mounting clips.



Considering how many DIN mounted devices there are I figured someone made an ATO/ATC DIN fuse block capable of 30 amps. All I've seen are fuse blocks based on PCBs and not a solid bussbar design.


Unless I find what I'm really wanting, I'll go with a standard RV style 50 amp breaker/fuse panel without the converter. That will give me the split 120V main buss I need for my design. I can feed each split phase with an individual 50 A breaker. The main double 50 amp breaker is located else where in the design.


I asked the question using ATO style fuse vs ATC, because more people know what ATO is.
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Old 02-02-2025, 10:22 PM   #6
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Our 17 feet, 2480 lb fiberglass Castia trailer started life as 30A 120VAC only. We upgraded it to 50A 120/240VAC split-phase. We use the 240VAC for a 6500 Watt electric/propane tankless water heater and a 3500 Watt induction cooktop. We used Progressive Dynamics for our DC and AC panels as shown in the photos previously posted. Every fuse slot in the DC panel is rated for 20A and 4 slots are rated for 30A. The AC panel uses a staggered bus bar just like residential panels making it easy to create 120VAC or 240VAC circuits as needed. Our LiFiPO4 Charger/Converter plugs into the back of AC panel. We have 100AH LIFEPO4 battery that can feed our 3000 Watt Inverter for our dry camping 120VAC 20A circuit which can be used independently and in addition of shore power. We created a detachable 50A shore power cord too.

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