Siemens 5SY45257 - Miniature Circuit Breaker 25A 277V AC
Siemens 5SY45257 - Miniature Circuit Breaker 25A 277V AC

Siemens 5SY45257 - Miniature Circuit Breaker 25A 277V AC

Siemens
Price
Save $113.24
/
Condition
  • Low stock - 9 items left
  • Backordered, shipping soon
Call for Price
The Siemens 5SY45257 is a miniature circuit breaker designed for overcurrent protection in industrial control panels and distribution systems. This single-pole unit is rated for 25A at 277V AC, providing reliable short-circuit and overload interruption. Constructed with a compact 1-inch wide thermoplastic housing, it features a toggle switch actuator and weighs 0.69 lb. The breaker complies with UL 489 and CSA C22.2 standards, ensuring safe operation in branch circuit applications. It is commonly used in motor control centers, lighting panels, and auxiliary circuits within manufacturing facilities.

Key Features & Specifications
  • Type: Miniature circuit breaker, thermal-magnetic trip, toggle switch
  • Voltage Rating: 277V AC
  • Current Rating: 25A
  • Dimensions: 1 inch wide, 3.5 inches tall, 2.5 inches deep
  • Standards: UL 489, CSA C22.2
  • Applications: Industrial control panels, lighting distribution, motor circuits
  • Switch Type: Toggle
  • Configuration: Single-pole
  • Coil Voltage Maximum: Not applicable (thermal-magnetic)
  • Temp Rating: 40°C ambient
  • Shipping Dimensions: 4 x 3 x 2 inches
  • Phase: Single-phase
  • Voltage: 277V AC
  • Amperage: 25A
  • AIC rating: 10 kA at 277V AC
  • Connection: Line and load terminals
  • Poles: 1
  • Protection: Overcurrent (overload and short-circuit)
  • Functions: Circuit isolation and protection
  • Frame Size: 1-inch
  • Trip Type: Thermal-magnetic
  • Panel Type: Industrial distribution
  • Breaker Type: Miniature
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not applicable
  • Metal Type: Copper alloy contacts
  • Panel Style: Flush mount
  • Bus Type: Plug-on
  • Fuse Class: Not applicable
  • Insulation Temperature: 105°C
  • Inductance: Not specified
  • Impedance: Not specified
  • Barrels: Not applicable
  • Class Rating: Not applicable
  • Diameter: Not applicable
  • Velocity: Not applicable
  • Clip Center: 0.5 inches
  • Clas: Not applicable
  • Mounting: DIN rail or panel mount
  • Hz: 50/60 Hz
  • Coil Material: Not applicable
  • Horse Power: Not applicable
  • Aux Contacts: Not included
  • CPT: Not applicable
  • Full Load Amps: 25A
  • Dist Voltage: 277V AC
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: 25A
  • Full Load Amp Minimum: 0A
  • Enclosure: Open style
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Copper
  • Amperage Maximum: 25A
  • Amperage Minimum: 0A
  • Nema Rating: Not applicable
  • Switch Style: Toggle
  • Wire Size: 14 AWG to 8 AWG
  • Certification: UL, CSA
  • Circuit Breaker Mounting Style: DIN rail or panel
  • Terminal Connection: Screw clamp
  • Frequency Rating: 50/60 Hz
  • Phase Connection: Single-phase
  • Standards: UL 489, CSA C22.2
  • Compatible Frames: Siemens 5SY series
  • Installation Type: Fixed
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: 1-inch
  • Current Rating: 25A
  • Reverse Standoff Voltage: Not applicable
  • Watts: Not applicable
  • Peak Pulse Current: Not applicable
  • Breakdown Voltage (MIN VBR@IT ) (V): Not applicable
  • Breakdown Voltage (VBR@IT) (V): Not applicable
  • Polarity: Not applicable
  • Operating Temperature Maximum Celsius: 40°C
  • Max Clamp Voltage: Not applicable
  • On-State Current: Not applicable


Product Identification
  • UPC: 75455487754
  • GTIN: 00754554877549