Overview
The Siemens FD63F250 is a 3-pole molded case circuit breaker frame from the Sentron Series A, rated for a maximum of 250A at 600VAC / 500VDC. This industrial-grade breaker is designed for reliable electrical protection in demanding commercial and industrial environments. The FD63F250 frame accepts interchangeable thermal units with ratings from 70A to 250A, allowing field customization of trip settings to match system requirements. Featuring a bolt-on connection design, this breaker integrates seamlessly into modern panel configurations.
Key Features
- 3-pole, 3-phase configuration for industrial power distribution
- Interchangeable thermal units rated 70A–250A for field-adjustable protection
- Bolt-on mounting for quick installation and removal
- Accepts field-installable shunt trip mechanisms and auxiliary switches
- Thermal-magnetic operating principle with long-time and instantaneous trip functions
- Meets UL 489, UL 1066, and ANSI C37 standards
Technical Specifications
- Manufacturer: Siemens (I-T-E Sentron Series)
- Frame Type: FD6 / FXD6
- Number of Poles: 3
- Maximum Current Rating: 250A
- Voltage Rating: 600VAC / 500VDC at 50/60 Hz
- Interrupting Rating (UL): 65 kA @ 240VAC; 35 kA @ 480VAC; 22 kA @ 600VAC; 18 kA @ 500VDC
- Interrupting Rating (IEC): 65 kA @ 220/240VAC; 35 kA @ 380/415VAC; 20 kA @ 500VAC
- Connection Type: Bolt-On with Line/Load Lug Terminal
- Operating Temperature: 40°C ambient
- Dimensions: 4.5″ W × 5.25″ D × 9.5″ H (frame only)
- Trip Mechanism: Thermal-Magnetic (interchangeable)
- Trip Range: 1100–2500A (adjustable per thermal unit selection)
Typical Applications
The FD63F250 is widely used in:
- Industrial power distribution panels and motor control centers
- Commercial facility main or branch breaker protection
- Heavy equipment and machinery protection requiring high interrupting capacity
- Systems requiring remote operation via shunt trip or auxiliary switches
- Facilities requiring customizable trip settings and field replaceable thermal units
Compatibility & Replacements
Compatible With
- Siemens Sentron FD and FD6 series breaker frames
- Siemens I-T-E Sentron molded case circuit breaker systems
- Standard industrial electrical panels rated for 600VAC / 500VDC
- Shunt trip mechanisms and auxiliary contact blocks (field-installable)
- Interchangeable thermal units rated 70A–250A
Replaces / Drop-In Replacement For
- I-T-E / Imperial Electric FD63F250
- Legacy Siemens Sentron Series A FD6 frames with 250A maximum rating
- Direct replacement for equivalent Sentron FD6-A configurations
Works With
- Sentron Series thermal-magnetic interchangeable trip units
- Shunt trip coils for remote operation
- Auxiliary switch packages for status indication
- Line and load lug terminal configurations
- Standard NFPA 70 / NEC-compliant panel designs
