al-63671 supply of switch mode power supply and diode supply of switch mode power supply and diode , supply of items as per following specifications , switch mode power supply , input: 1 phase , 100 to 240 vac , 50 hz , output:48 vdc / 10 a , output voltage range: 40 to 55 vdc adjustable , efficiency: 90% or higher , cooling: free air convection , mtbf: more than6 lakh hours for 40 deg c , features required: transient surgeprotection , selective fuse breaking , approvals: ul508 listed , ul60950-1 , tuv en60950-1 , overload & overvontage protection: required , output led:dc ok/low , output contact: built-in relay contact for dc ok , mounting:din rail , operating temperature: 0 to 70 deg c . series or paralleloperation shall be possible . , diode oring module with power diodes for connecting two smps of outputrating: 48 vdc / 10 a in parallel for redundancy , efficiency: 95% orhigher , ounting: din rail , approvals: ul 508 listed , ul 60950-1 .