Bel Fuse Launches 100W Medical GaN Power Supply with USB-C

Bel Fuse Inc. has introduced the SDM100G series, a new family of 100-watt desktop power supplies designed specifically for medical applications. As the company’s first medical USB Type-C power supply line, the system combines advanced USB-C Power Delivery (PD) with high-efficiency gallium nitride (GaN) technology. This architecture provides developers of portable medical devices, patient remote monitoring systems, and mobile workstations with a compact charging platform that eliminates proprietary power connectors and helps reduce electronic waste.

Flexible Power Supply and MOPP Patient Protection
To power a wide range of devices with a single platform, the SDM100G series supports five dynamic USB-C PD output voltages: 5 V, 9 V, 12 V, 15 V, and 20 V. The power supplies are offered in the SDM100G-U and SDM100G-D versions, which feature C8 (Class II) and C14 (Class I) AC inputs, respectively, to comply with various regional electrical standards. For critical healthcare applications, the series is certified to the stringent IEC/UL 60601-1 medical standard. It features MOPP (Means of Patient Protection) classifications for safe galvanic isolation and electric shock protection, alongside integrated overcurrent and short-circuit protection circuits.

Additional Context: Gallium Nitride (GaN) in Medical Technology
This section details technical specifications and competitive benchmarking not included in the original product announcement.

Historically, medical-grade power supplies (compliant with IEC 60601-1) were often bulky and heavy due to the need for enlarged internal creepage and clearance distances as well as voluminous transformers to physically guarantee required strict isolation barriers (such as 2x MOPP). The adoption of wide-bandgap gallium nitride (GaN) semiconductor technology is now revolutionizing this highly regulated sector as well. GaN transistors switch significantly faster and with vastly lower switching and thermal losses than traditional silicon MOSFETs. This drastically increased switching frequency allows engineers to massively downscale the size of passive components within the power supply—such as magnetic transformers and smoothing capacitors. Combined with the standardized USB-C PD protocol, which dynamically negotiates voltage and current with the end device, GaN-based power supplies enable hospitals to significantly reduce the transport weight of mobile diagnostic equipment without compromising electrical patient safety.

Edited by industrial journalist Lekshman Ramdas, with AI assistance.

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