The Bel Fuse Inc. SST 4 is an obsolete electronic component that falls under the Circuit Protection>Fuses category. With a slow-blow response time and a breaking capacity of 50A, this board mount fuse is a reliable choice for protecting electronic devices. The SST 4 has a voltage rating of 125V AC and DC, and a current rating of 4A. The SST 4 is a surface mount device (SMD) with a package/case size of 2-SMD, square end block. The temperature range for operating this component is -55°C to 125°C. The SST 4 is approved by AEC-Q200, CE, CSA, and cULus, making it a trustworthy and efficient choice for circuit protection.