Siemens 5SY42108

Image may be a representation.
See specs for product details.
Circuit Breaker; Supplementary; 2-P; 10A; D Curve; DIN Mnt; UL1077
Manufacturer #: 5SY42108
Allied Stock #: 70372335


Datasheet Datasheet

Pricing (USD) & Availability
Standard Pricing
$86.65 (Each)
1 $86.65
3 $83.74

0 can ship immediately.

Request Lead Time

Minimum Quantity: 1

Multiples Of: 1
Product Specifications
Product Attribute Attribute Value Search
Actuator Type Toggle
Series 5SY Series
Current Rating 10 A
Mounting Type DIN Rail Mount
Number of Poles 2 Pole
Standards UL 1077
Termination Screws
Type Thermal/Magnetic
Voltage Rating 480 VAC
Primary Type Miniature Circuit Breaker
Characteristic D Curve
UPC Code 754554780016


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.


  • High rated breaking capacity of up to 14,000 A
  • Identical terminals at both sides for an optional infeed from the top or the bottom
  • No tool required for mounting or dismounting
  • Separate switch position indication

    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.

  • Product Added to Cart
    Circuit Breaker; Supplementary; 2-P; 10A; D Curve; DIN Mnt; UL1077
    Allied Stock #: 70372335
    Mfr's Part #: 5SY42108
    $86.650 Each
    Quantity added: