SCHURTER - SMD Fuse, Slow Blow, 4012, 250V AC / 125V DC - 10A

The SCHURTER UMT 250 series SMD fuse is a high-quality electronic safety component designed for reliable overcurrent protection in surface-mount device applications. Featuring a robust ceramic housing for excellent thermal and mechanical stability, this time-delay, non-resettable fuse provides primary circuit protection on densely packed printed circuit boards.

Engineered for a wide operating ambient air temperature range from -55°C to 125°C, this fuse is suitable for demanding environments. It supports common assembly processes including reflow and wave soldering, making it ideal for high-volume automated manufacturing. The tin-plated copper alloy terminals ensure excellent solderability and reliable electrical connections.

Key Features and Applications

This slow-blow fuse is specifically designed for applications requiring tolerance to temporary inrush currents without nuisance tripping, making it perfect for power supplies, motor drives, and transformer protection. With a high breaking capacity of 35A for both AC and DC circuits, it can safely interrupt significant fault currents.

The compact 4012 case style offers a space-saving solution for modern electronics where board real estate is at a premium. Its primary applications span safety-critical systems, industrial controls, and medical electronics, where dependable overcurrent protection is non-negotiable.

Specifications and Design

• Housing Material: Ceramic for superior insulation and heat dissipation
• Mounting Type: Surface-mount device (SMD) for PCB integration
• Terminal Material: Tin-plated copper alloy
• Characteristic: Time-delay (slow blow)
• Type: Non-resettable
• Voltage Rating: 250V AC / 125V DC
• Breaking Capacity: 35A (AC & DC)
• Operating Temperature Range: -55°C to 125°C
• Compatible Soldering Methods: Reflow and wave soldering

Variant Details

• Size: 10A