MST 250 Subminiature Fuse

Category: Circuit Protection Devices, Electronics, Schurter Inc

Overview

The MST 250 Subminiature Fuse by SCHURTER is a time-lag fuse specifically designed for printed circuit board (PCB) applications, featuring a low breaking capacity. It is rated for use at 250VAC and 63VDC with rated currents ranging from 0.05A to 6.3A. Its small size (8.5 mm) and compatibility with both short and long PCB terminal types make it versatile for use in electronic devices. The fuse is designed to provide primary protection on a PCB, such as for a power supply adapter for laptops or switching mode power supplies (SMPS) used in TVs and DVDs.

Technical Data and Features

The MST 250 fuse has a breaking capacity of 35A to 63A with a time-lag characteristic. The ambient operating temperature range is from -55°C to 125°C, and it belongs to the climatic category 55/125/21 according to IEC 60068. The housing is made from a thermoplastic material UL 94V-0, and the terminals are constructed of tin-plated copper. The unit weighs just 0.53 grams.

Soldering and Environmental Resilience

Optimized for PCB mounting through hole technology (THT), the MST 250 is capable of wave soldering with a profile solderability of 235°C for 2 seconds (acc. to IEC 60068-2-20, Test Ta) and a resistance to soldering heat at 260°C for 10 seconds (acc. to IEC 60068-2-20, Test Tb). It is highly resistant to moisture, vibration, mechanical shock, and solvents as per various standardized tests, including MIL-STD-202. The case and terminal strength can sustain high-load conditions, ensuring durability and reliability in various industrial environments.

Approvals, Compliance, and Applications

SCHURTER’s MST 250 fuses are approved for industry standards and have certifications from multiple independent testing bodies. The documents concerning the specific product approvals, code specifications, and thorough test conditions are accessible through SCHURTER’s resources. Special characteristics and custom requirements can be accommodated through individual agreements, suggesting the flexibility of the MST 250 fuses for specialized industries such as automotive technology, medical technology, and aerospace, provided they meet the standards – IATF 16949, ISO 13485, and other customer-specific protocols.

Additional Resources

The datasheet links to further information including a detailed request form for the product, a general product overview, information on stocking by distributors, and options to request a newer version of the datasheet. Users can obtain corresponding fuse holders and fuse kits for the MST 250, and there are web links available for direct access to these resources.