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G5SB-14-DC5 Relays implications to 2A / 125 VDC Fuse

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#76464

G5SB-14-DC5 Relays implications to 2A / 125 VDC Fuse | 13 October, 2016

I hope you could able to help me how come the fuse blown out when we powered up the board containing relays. The relays rated current is 80milliAmps only compared to the 2A fuse.The relay contact form is SPDT.

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#76466

G5SB-14-DC5 Relays implications to 2A / 125 VDC Fuse | 14 October, 2016

As you imply in your question, it's counter intuitive that a 2A fuse would blow before an 80mA relay circuit activated in the same circuit. Assuming the 80mA relay circuit is a protection circuit. There's maybe 100 different design goals [ https://books.google.com/books?id=imti-gC62xUC&pg=PA42&lpg=PA42&dq=relay+lag+time&source=bl&ots=G1khv4W4Eq&sig=nljGBX7R7wOSwM8pfK_841sgkqU&hl=en&sa=X&ved=0ahUKEwi_0J250trPAhUEJiYKHUQdDCMQ6AEITzAF#v=onepage&q=relay%20lag%20time&f=false ] of relay circuits. So, if not current protection, what's the purpose of your circuit?

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