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Medical power solutions to support a rapidly changing market

The medical market is changing at a pace that no-one could have predicted. The demand for specialist medical-grade components has rocketed, along with the wider requirements of companies and institutions that must adapt their processes for social distancing, remote building access control, security and contactless monitoring.

Selecting the right, medically-compliant power components for these specialist applications in a complex environment of constantly evolving standards, disrupted manufacturing processes, reduced design cycles and unpredictable freight circumstances can be challenging.

Our deeply knowledgeable team of power specialists are ready to assist you with the most appropriate solution for your medical requirements. Our long-standing partnerships with industry leading manufacturers means that we can offer you fast access on available inventory and support your supply chain requirements with alternative component advice to work around extended lead-times.

An industry leading medical power linecard

Our linecard features products from the world's leading power suppliers, designed and manufactured to meet medical safety standards and requirements for:

Medical imaging: ultrasound scanners, MRI, CT, PET, X-Ray
Surgical devices: robotics, electro surgery, laser surgery
Medical devices: patient therapy, patient monitoring, patient transport, beds, ventilators, powered air-purifying respirator, anesthesia machines, aspiration and suction pumps, autoclaves, sterilisers, blood chemistry analysers, centrifuge and many more
Dental equipment: oral care systems, CAD/CAM systems, digital radiography
Wellness and beauty: laser hair removal, UV light therapy, laser therapy, ultra-sound

We discuss some of the key design considerations for power supply operation in these applications, such as minimising audible noise, and control interfaces, in this article.

Table

	AC-DC power supplies (Watt)							DC-DC high isolation (Watt)
		Board mount	Adaptor	Open frame	Enclosed	Conduction cooled	Modular		Low power	Mid-high power
		Chassis mount	External	U-frame	Metal case	Convection cooled	Single to multi o/p		Miniature
		DIN rail clip	Wall mount	1U	With fan	Fanless	Fanless	With fans	DIP8-SIP-SMD	DIP-.5"*.5"/2"x3"
Aimtec	5-30		15-45	15-40				0.5-6	6-40
Bel Power Solutions	400		40-1200	1000-1200	400-1200		900-1600
Delta Electronics	4-60	5-250	40-600	200-400	400-1200		1200-2100	1-10
Excelsys			500	1000	500-1000	600-1000	400-1800
FLEX Power								0.5-2	30-820
MEAN WELL	5-90	5-220	30-500	100-1200	200-1500 (2500)	400	400-1200	1-2	15-20
Murata Power Solutions			250-650		250-650			.25-5	6 + USB

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Medical power supply certifications

Medical application safety prevents patients and equipment operators from shock or hazard. Below is a brief overview of medical power safety certifications and standards.

Certification for safety

Generic standard IEC / EN 60601-1
Depending on isolation approved for MOP
MOOP (Operator) or MOPP (Patient)
B, BF, CF protection against electric shock

Specific requirements

Particular standard IEC / EN 60601-2-xx

Means of protection

MOOP. Means of Operator Protection, specified for equipment with no patient contact such as lab equipment
MOPP. Means of Patient protection, specified for equipment with patient contact such as hospital beds or scanners

Medical system types

Type B (Body). Type B classification is given to applied parts that are generally not conductive and may be connected to Earth, such as a motorised hospital bed, X-ray machine or LED lighting systems, etc.
Type BF (Body floating). Type BF classification is given to applied parts that are electrically connected to the patient and must be floating and separated from Earth. This classification does not include applied parts which are in direct contact to the heart. Examples of BF applications are blood pressure monitors, lass, electrosurgical devices, ultrasound equipment etc.
Type CF (Cardiac floating). Type CF classification is given to applied parts suitable for direct cardiac connection (connection to the heart of the patient) and is the most stringent classification. These parts must be floating and separated from Earth. Such parts include defibrillators, intracardiac ECG electrodes and external pacemakers

Most modern medical power supplies are 2x MOPP, meaning two means of protection equal to two isolation barriers. In practice these are suitable for Body (B) and Body Floating (BF) applications.

A third isolation barrier is needed for Cardiac Floating (CF) applications, in most cases a high isolation DC-DC converter is needed to connect the “applied part” in cardiac chirurgy.

Avnet Abacus' range of medical power supplies is fully certified to all required safety standards.To learn more safety standards, as well as creepage, clearance and leakage currents, read our article on understanding medical power supply requirements.

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During the Covid-19 outbreak we’re working closely with our suppliers to prioritise orders for our medical customers and support your critical requirements.