Jan 12, 2017 #1 S satiz Member level 5 Joined Jun 9, 2013 Messages 87 Helped 3 Reputation 6 Reaction score 3 Trophy points 1,288 Activity points 1,999 Hi, I need to select MOV and input fuse for my SMPS circuit, Please give me some guidance. My specifications are given below AC input max : 275 V Rms current : 250mA Circuit having 5KVA isolation between input and output sections
Hi, I need to select MOV and input fuse for my SMPS circuit, Please give me some guidance. My specifications are given below AC input max : 275 V Rms current : 250mA Circuit having 5KVA isolation between input and output sections
Jan 12, 2017 #2 d123 Advanced Member level 5 Joined Jun 7, 2015 Messages 2,505 Helped 494 Reputation 992 Reaction score 525 Trophy points 1,393 Location Spain Activity points 27,148 Hi, For the varistor, it needs to be selected to have a trigger voltage above the required load/SMPS voltage and at or below the required clamping voltage, the current ratings are usually higher than 250mA. Try browsing this product page for Varistors at Panasonic to look for what you need. For a suitable fuse, this might help: Fuse Selection Guide Don't know if you've seen this, about protecting the MOV too: Designing with Thermally Protected TMOV Varistors in SPD and AC Line Applications
Hi, For the varistor, it needs to be selected to have a trigger voltage above the required load/SMPS voltage and at or below the required clamping voltage, the current ratings are usually higher than 250mA. Try browsing this product page for Varistors at Panasonic to look for what you need. For a suitable fuse, this might help: Fuse Selection Guide Don't know if you've seen this, about protecting the MOV too: Designing with Thermally Protected TMOV Varistors in SPD and AC Line Applications