New medical power supply for cardiac patients

This 750W Made in USA power supply meets the most stringent rating under the IEC 60601-1-standard. Medical power supplies with a cardiac floating (CF) rating isolate system circuitry from the patient’s heart and must have a patient leakage current that does not exceed 10 µA.

Most leakage currents are generated by excess capacitance, the ability of a component or circuit to store an electrical charge. Under the IEC 60601-1-standard, a power supply’s rating determines the maximum allowable patient leakage current, the amount of current in the AC line that reaches the patient. Bear has developed an innovative isolation technique that yields leakage current of less than 5 µA, exceeding the requirements for Type CF-rated medical devices.

The low leakage CF-rated power supply that Bear is now developing will be delivered in about three months. Bear has also received a request for quote (RFQ) for a second custom power supply from the same customer. Customisation enables medical power supply designers to meet the exact power needs for a system while ensuring compliance with standards such as IEC 60601-1 and 2 MOPP, which requires at least two means of patient protection between the input and output of an AC-DC power supply.

“Bear Power Supplies was selected for this project because of our deep experience with low leakage medical power supplies,” said Michael Allen, President. “We also excel at customisation, even for low volumes, and can provide non-standard output voltages, unusual form factors, compact sizes for portable medical devices, wash-down safe encapsulation, and more.”