Oct 10, 2009 #1 E eem2am Banned Joined Jun 22, 2008 Messages 1,179 Helped 37 Reputation 74 Reaction score 24 Trophy points 1,318 Activity points 0 i use CMB0207 Melf resistor of value 22 Ohms (1W) as an inrush resistor in a 240V offline SMPS. Resistor datasheet https://www.vishay.com/docs/28755/cmb0207.pdf the DC Bus caps that will cause the inrush are two 1u5 400V film capacitors of negligible ESR. Caps are MKT series (B32523Q6155) 1.5uF, 400V -On page 15 of this datasheet....... **broken link removed** so it is an RC circuit with... R = 22 Ohms C = 3uF Step input voltage = 340V. (mains peak) will this resistor be able to handle this inrush situation?
i use CMB0207 Melf resistor of value 22 Ohms (1W) as an inrush resistor in a 240V offline SMPS. Resistor datasheet https://www.vishay.com/docs/28755/cmb0207.pdf the DC Bus caps that will cause the inrush are two 1u5 400V film capacitors of negligible ESR. Caps are MKT series (B32523Q6155) 1.5uF, 400V -On page 15 of this datasheet....... **broken link removed** so it is an RC circuit with... R = 22 Ohms C = 3uF Step input voltage = 340V. (mains peak) will this resistor be able to handle this inrush situation?