Tdk lambda single output general purpose power supply ls25 series tdk lambda ls 75 33 the tdk lambda ls75 33 75w is a single output general purpose power supply that belongs to the ls25 series this compact low cost power supply offers a mtbf of 900000 hrs superior reliability and a broad operating temperature range it is suitable for installation in indooroutdoor enclosures above 50degc the psu offers a low derating with up to 70 load available at 70degcapplications include te