See specs for product details.
2 can ship immediately.
Minimum Quantity: 1
|Current Rating||:||20 A|
|Mounting Type||:||DIN Rail|
|Number of Poles||:||2 Pole|
|Primary Type||:||Miniature Circuit Breaker|
|Voltage Rating||:||400 VAC|
SIEMENS 5SY(4, 5, 6) Series Miniature Circuit Breakers – UL1077 Supplementary Protector Miniature Circuit Breakers:
Siemens' UL 1077 Supplementary Protectors are designed to provide additional protection along with a branch circuit protection device. Since our 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 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 with out 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.
Supplementary protectors are equipped with a delayed overload/time-dependent thermal release (thermal bimetal) for low overcurrent's and with an instantaneous electromagnetic release for high overload and short-circuit currents. The thermal trip point on all versions is 1.13 to 1.45 times the supplementary protector rating.
Tripping characteristic A, -5:
To protect very sensitive circuits such as semiconductors. Magnetic trip point - 2 to 3 times supplementary protector rating.
Tripping characteristic B, -6:
For European residential circuit protection. Also for protection of computers and electronic equipment. Magnetic trip point
- 3 to 5 times supplementary protector rating.
Tripping characteristic C, -7:
For general device protection in control circuits and all other supplementary circuit protection systems. Magnetic trip point
- 5 to10 times supplementary protector rating.
Tripping characteristic D, -8:
For protection of high inrush loads. Magnetic trip point - 10 to 20 times supplementary protector rating.