UST 1206 chip fuse – new up to 35A
The SCHURTER UST 1206 is a chip fuse designed for surface mounting with a ‘slow-blow’ characteristic. This feature means that it has a high melting integral (I²t), preventing the fuse from tripping immediately when exposed to inrush current peaks that exceed the rated current.
This behaviour is crucial for various industrial applications, such as motors and power converters, where sudden surges in current are common but should not lead to immediate circuit interruptions.
UL 248-14 characteristic
The UST 1206 is designed in accordance with the UL 248-14 standard, which defines the performance characteristics of fuse-links for low-voltage applications. In this context, the rated current of the fuse is the level at which it will interrupt the circuit after a prolonged period. However, the maximum continuous current that the fuse can handle without tripping is approximately 70% of the rated current. This ensures reliable protection while allowing normal operating currents to flow without unnecessary interruptions.
New variants up to 35A
The existing UST 1206 range previously had a maximum rated current of 25A. SCHURTER has now expanded the series with two additional variants, offering rated currents of 30A and 35A. These new versions maintain the same robust design while extending the range of applications where higher current capacities are required. The fuses are rated for operation at voltages of 32VAC and 63VDC, providing flexibility in both AC and DC applications. Additionally, they support a broad operating temperature range from –55°C to +90°C, making them suitable for use in harsh environments where temperature fluctuations may be a factor.
Application areas
The SCHURTER UST 1206 is ideal for secondary overcurrent protection in circuits with high current demands, even at low voltages. This makes it particularly well-suited for applications in power electronics, battery management systems, and industrial automation, where consistent and reliable protection against overcurrent events is essential. Its ability to handle high inrush currents without premature tripping enhances system reliability and reduces maintenance requirements, making it a valuable component in demanding electrical systems.