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1
vote
0answers
61 views

Dual diode connection for return path

I want to use the following dual diode for the return path with a fuse. The diode is dual with each diode rated 25A, the cathode is the same, which means I have to connect it like in the figure? Do I ...
6
votes
3answers
882 views

Fuse 125V/4A can be replaced with 250V/4A?

I want to replace a blowed fuse 125V/4A but it is rare to find them. Can I use instead a 250V/4A ? I read at https://www.mojotone.com/support/Knowledge-Base/Is-it-ok-to-replace-125v-glass-fuses-with-...
1
vote
2answers
277 views

Can a thermal fuse of a higher rated current be used safely?

I want to replace a 115°C 250V 2A thermal fuse used in a fan motor. The only fuses available locally are 115°C 277V 15A. Can I use the higher current rated thermal fuse? Since it is a thermal fuse, I ...
0
votes
1answer
104 views

In a DC circuit, are there any reasons for wiring overcurrent protection such as fuse or pptc PHYSICALLY near the load?

In a DC circuit, are there any reasons for wiring overcurrent protection such as fuse, pptc, etc.... PHYSICALLY near the load(or inside it)? By wiring "physically near", I mean in the power wire going ...
0
votes
1answer
210 views

How to fuse batteries connected in parallel?

I have two GEL batteries 12V/130Ah and want to connect them together in parallel. Currently I have one battery in the system and it is fused on the positive wire before the isolation switch. I ...
1
vote
3answers
166 views

Is it necessary to add fuse protection (at the inputs) when using multiple DC-DC converters?

I would like to know if it is necessary (or recommended) to add fuses at the inputs when using multiple DC-DC converters. I have attached a quick schematic to illustrate what the design would look ...
1
vote
2answers
65 views

Can an array of fuses protect a PC port from damage?

I'm paranoid right now because I made another circuit meant for the parallel port of the PC. While all my previous experiments involving the port were successful (except for one experiment I made a ...
0
votes
1answer
535 views

12V 12A resettable crowbar circuit

The idea is to protect the input stage of a control card from improper power supply connection. The power supply is a standard desktop AC-DC power adapter (Meanwell GST160A12) with inbuilt shortcut, ...
4
votes
3answers
3k views

Circuit breaker vs fuse timing

Recently I powered on an electrical device that was (unbeknownst to me) quite defective. It tripped the circuit breaker almost immediately (after shooting off some sparks). There was a small (600W) ...
0
votes
1answer
472 views

Using mixer grinder circuit breaker in a electronic circuit

I'm thinking of using a 5A mixer grinder circuit breaker in an electronic circuit which uses a 2200mAh Li-Po battery and a 5A step-down voltage regulator. Is it safe to use such a circuit breaker in ...
2
votes
1answer
809 views

Circuit protection fuse and MOV

I have designed an SMPS circuit in which i have seen bulk capacitor getting damaged in a few cases (2-3 cases out of 100, which is still huge if I am aiming for a bulk production). The circuit has ...
3
votes
1answer
2k views

Fuse current rating and breaking capacity

I want to use the following fuse to safely interrupt a buck power supply with rated parameters Input (1A, 24V)==> Output (250mA, 12V). In the datasheet of the fuse, the constructor specifies the ...
0
votes
0answers
247 views

Resettable fuse failure

I have a 1.1A, 33V resettable fuse in SMD 1812 package. To test it, I connected a 6A 20V source across it. It went up in a flame that lasted a few seconds. Should I conclude that the fuse is out of ...
3
votes
1answer
1k views

24V Circuit Protection - Fuse, TVS Diode, RC Snubber

I have pored over data sheets and read numerous articles on circuit protection. I understand conceptually, but I don’t trust my level of knowledge to implement it optimally. I want to be as specific ...
0
votes
1answer
133 views

Fuse and fuse holder

Intro I am currently working on an e-board. my esc is a vesc, which has the following ratings: Voltage: 8V – 60V (Safe for 3S to 12S LiPo). Current: Up to 240A for a couple of seconds or about 50A ...
1
vote
2answers
2k views

Where to put the Fuse in a circuit

I have circuit where the input can be 12-48V AC or DC. This is fed to a bridge rectifier. I plan to put a fuse and got a bit confused, what is the best place to put a fuse? before the bridge after ...
3
votes
1answer
2k views

Overvoltage protection for RS485 inputs

I am using an Analog Devices ADM483E RS485-chip to build a device with RS485-capability. Datasheet here: http://www.analog.com/media/en/technical-documentation/data-sheets/ADM483E.pdf . The finished ...
1
vote
1answer
1k views

Alternatives for automotive fuses?

So be I recently asked a question about using a PCB design for a fusebox (link here: PCB design for automotive fusebox?) but since recently come across two other fuse alternatives: PPTCs and ...
1
vote
2answers
345 views

Best approach to design or implement short circuit protection?

I'd like to implement a safety mechanism in my circuit to avoid overvoltages/overcurrents in the event of a short, but am unsure as to what what the most robust or appropriate design approach would be....
1
vote
1answer
2k views

What are the correct zener diode and PTC fuse size?

Noob here. I need to add overvoltage protection to a small, portable solar power system I'm putting together. The solar PV array has a loaded voltage in the 23-26v range and an open circuit voltage ...
1
vote
2answers
1k views

Fuse for AWG 8 wiring

Assuming I put a 60amp fuse to an AWG 8 wire, whats the worst case scenario when a short circuit happens? Therory about short circuits says the current goes to "infinity" however, shouldnt the fuse ...