The IRM-05-3.3 is a small, low-cost DC/DC power supply module manufactured by Mean Well Enterprises. It is a compact, isolated, and regulated DC/DC converter with 4 pins, delivering a maximum of 5W of output power. It is designed to operate in an ambient temperature range of -40° C to +90° C and can accept input voltage of 4.5 to 24V DC. The IRM-05-3.3 has a wide variety of features including built-in protection against overvoltage, overload, and short circuit. It also has high efficiency of up to 86%, ripple noise of up to 200mV peak to peak and an isolation width of 3KVDC. The IRM-05-3.3 is widely used in a variety of applications such as industrial control systems, telecommunication equipment, and computer peripheral equipment.