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5SY4120-7
Siemens 5SY4120-7 20 AMP Single Pole Breaker

 
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Siemens 5SY4120-7 Single pole, 20 AMP Supplementary Circuit Breaker with tripping characteristic type C (medium levels of inrush) - Mounts on standard 35mm DIN rail
List Price: $76.50
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Savings: $50.88
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Product Code: 5SY4120-7
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Description Detailed Specifications
 
Siemens' UL 1077 5SY41 Supplementary Protectors are designed to provide additional protection along with a branch circuit protection device. Since these Supplementary protectors are made to trip faster than a standard UL 489 Circuit Breaker they are able to provide additional protection for more sensitive devices inside the panel. Supplementary protectors can be used in a number of industrial applications such as to provide selectivity for multiple motor control circuits on the secondary side of a control transformer or power supply by allowing the user to quickly find the problem circuit should a fault occur without having to shut down all of the other control circuits. Supplementary protectors may also be used as a local disconnecting means inside the panel when a branch circuit protection device is already present.
Technical Specifications
  • 5SY41 Supplementary protectors are equipped with a delayed overload/ time-dependent thermal release (thermal bimetal) for low overcurrents and with an instantaneous electromagnetic release for high overload and short-circuit currents. The special contact materials used virtually guarantee a long service life and offer a high degree of protection against contact welding.