Bel Launches 1 W Isolated DC-DC Converters for Mission Critical Designs

Bel Fuse has announced its PTM1-S Series, a new family of 1 W isolated DC-DC converters designed to meet the growing demand for medically certified, high-isolation power electronics in a constrained physical footprint.

The PTM1-S Series of 1 W DC-DC converters is designed for high-isolation power designs.

The primary advancement of this product series is its ability to deliver rigorous dual-certification standards for both Information Technology Equipment (ITE) and medical applications within a single, highly compact device.

Dual Certification and Isolation Integrity

The PTM1-S Series is crafted for isolation integrity by providing 6000 VDC isolation and reinforced insulation rated for 300 VAC. This robust isolation establishes critical hardware-level protection against electrical surges and cross-circuit faults in applications where reliable separation is non-negotiable.

To streamline design cycles for cross-over applications, the components hold dual safety certifications: UL/IEC 62368 for standard ITE hardware and EN 60601 with 2xMOOP (Means of Operator Protection) for medical platforms. By meeting the stringent parameters required for both medical instrumentation and standard industrial equipment, engineers have the flexibility to qualify a single part number across multiple deployment environments. This eliminates the necessity of maintaining separate inventory lines for clinical, commercial, and industrial systems. More information can be found in the PTM1-S Series data sheet.

Thermal Resilience and Voltage Architecture

The encapsulated SIP-7 package is engineered for continuous function across diverse and strenuous operating environments. The converters can sustain performance across an extended temperature range of -40°C to +100°C. This exceptional thermal tolerance ensures the hardware is viable for harsh outdoor and industrial control installations, as well as climate-controlled clinical settings.

Temperature derating curve for the PTM1-S Series

The initial product lineup employs a 1:1 input-to-output voltage ratio. The series supports standard input rails common in industrial and medical control platforms, including 5, 12, 15, and 24 VDC options, alongside specific single outputs of 5 and 12 VDC.

A critical engineering benefit is the component's ability to deliver medical-grade safety without expanding the physical footprint. The company says that the PTM1-S Series provides a dual-certified solution demonstrating that high isolation and strict medical compliance do not necessitate a larger physical form factor, catering directly to technicians and engineers constrained by strict size requirements.

Built for Complex Needs

According to Bel, this series of DC-DC converters represents a compelling step forward for engineers managing complex, hybrid deployments that require high-voltage separation in restricted spaces. It is significant to see how integrating an elevated 6000 VDC isolation threshold with dual industrial and medical safety certifications establishes a distinct benchmark for power components.

It appears that this hardware is well suited for medical instrumentation, harsh-environment equipment, and industrial control systems looking to maximize safety while streamlining component qualification and supply chain logistics.

All images used courtesy of Bel Fuse.