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.
| 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 | |||||
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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