Bussmann KTK-20 Fuse

Meet Bussmann KTK-20, a Limitron fast-acting supplemental midget fuse designed for compact protection in control, lighting, and meter circuits. Rated at 20 A and 600 VAC, the KTK-20 fits standard 13/32 in x 1-1/2 in fuse holders and uses a melamine tube with robust end-caps to endure routine electrical cycling. As a Class CC fuse, it responds quickly to overcurrent events while minimizing damage to upstream components. The KTK-20 delivers an interrupting rating up to 100 kAIC at 600 V, making it suitable for circuits with fault potential in industrial and commercial environments. Widely cataloged in the Bussmann Limitron family, this 20 A KTK variant is commonly used to protect control transformers, lighting ballast, and instrumentation circuits in panel boards and power equipment. For engineers replacing legacy KTK devices or designing protection schemes, the KTK-20 provides a compact, reliable solution that aligns with standard Bussmann sizing and performance expectations.