Tdk lambda dsp series din rail power supply low profile tdk lambda dsp10 5 at just 56mm deep tdk lambdas dsp10 5 din rail power supply is ideal for installation in wall cabinets for building automation the psu has a robust plastic enclosure wide range input with no input selectors and delivers full output without derating at temperatures up to 61degctypical applications include alarms and security access and fire safety systems lighting and environmental control systems tdk lambda