Tdk lambda single output din rail mount power supply tdk lambda drb 50 48 1 the tdk lambda drb 50 48 1 is a din rail power supply operating at 48 528v 105a this power supply is ideal for low power applications that require a keenly priced basic functionality it has been designed to support the growing trend for simple and economic din power solutions in industrial building automation and process control applications the drb 50 48 1 combines low cost and extremely compact dimensions with