Isolated Direct Current Converters for Medical and Industrial Applications

Bel Fuse Inc. is releasing the PTM1-S series, a family of isolated 1W DC/DC converters engineered specifically for medical devices and industrial control systems. This hardware solution delivers medical-grade electrical isolation within an encapsulated SIP-7 package, establishing an effective architecture for applications that require high-voltage separation in restricted physical footprints.

Dual Certification in Medical Power Electronics
The PTM1-S series provides 6,000 VDC isolation and reinforced insulation for 300 VAC, establishing hardware-level protection against overvoltages and short circuits. To support crossover applications, the components hold dual safety certifications: UL/IEC 62368 for Information Technology Equipment (ITE) and EN 60601 with 2xMOOP (Means of Operator Protection) for medical applications. By meeting the stringent parameters required for medical power electronics and standard ITE hardware, engineers can qualify a single part number for multiple deployment environments, which eliminates the necessity of maintaining separate inventory lines for clinical and industrial systems.

Thermal Resilience and Voltage Configuration
Engineered for continuous function across diverse operating environments, the encapsulated converters sustain performance within an extended temperature range of -40 °C to +100 °C. This thermal tolerance makes the components viable for harsh outdoor installations as well as climate-controlled clinical settings. Zoe Bauer, Product Manager, indicated that the architecture provides a dual-certified solution for technicians who require high isolation and medical standard compliance without expanding the component's physical footprint. The initial product lineup utilizes a 1:1 input-to-output voltage ratio, supporting standard industrial input voltages of 5, 12, 15, and 24 VDC alongside specific outputs of 5 and 12 VDC.

Additional Context
This section details technical specifications and competitive benchmarking not included in the original news release.

Within the 1W SIP-7 isolated DC/DC converter market, manufacturers frequently separate medical and industrial product lines due to the differing insulation requirements. Competitive alternatives, such as the RECOM REM1 series and the Murata MEJ1 series, offer similar form factors but target slightly different specification brackets. The RECOM REM1 provides 5.2 kVDC isolation with 2xMOPP (Means of Patient Protection), equipping it for direct patient contact applications, whereas the PTM1-S utilizes 2xMOOP, which is restricted to operator protection. Conversely, standard industrial converters like the Murata MEJ1 provide 5.2 kVDC isolation and UL 62368 certification but lack the specific EN 60601 medical classification. By combining an elevated 6,000 VDC isolation threshold with 2xMOOP and dual industrial/medical safety certifications, the PTM1-S series establishes a specific benchmark for hybrid applications where standard ITE converters lack sufficient voltage isolation margins.

Edited by Aishwarya Mambet, Induportals Editor, with AI assistance.

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