| Breaker type | Molded-case circuit breaker (MCCB) | $300–$1,200 | The most common 250 amp format; price depends on trip unit, interrupt rating, and accessories. |
| Advanced breaker construction | Insulated-case or higher-performance construction | $900–$3,500 | Designed for demanding commercial or industrial applications and often includes more adjustment and monitoring features. |
| Number of poles | 2-pole, 3-pole, or 4-pole | $300–$2,500 | More poles generally require a larger internal assembly and cost more. Three-pole units are common in three-phase systems. |
| Voltage rating | Up to 240 V, 480 V, or higher-voltage applications | $300–$3,000 | Higher voltage ratings typically require more robust insulation, spacing, and testing. |
| Interrupting rating | 10 kAIC, 18 kAIC, 25 kAIC, 35 kAIC, or higher | +$50–$900 | A higher kAIC rating allows the breaker to safely interrupt greater available short-circuit current. |
| Trip unit | Fixed thermal-magnetic, adjustable electronic, or communicating electronic | $300–$2,500 | Electronic trip units cost more but can provide adjustable protection, metering, alarms, and communication functions. |
| Accessories | Auxiliary contacts, shunt trip, undervoltage release, motor operator, or remote control | +$50–$1,000 | Each factory-installed accessory adds components, wiring, testing, and configuration requirements. |
| Enclosure and environment | Indoor, outdoor, dust-resistant, corrosion-resistant, or hazardous-location enclosure | +$100–$1,500 | Outdoor and harsh-environment protection requires stronger cabinets, seals, coatings, or certifications. |
| Condition | New, surplus, refurbished, or used | $150–$2,500 | Used or refurbished units may cost less, but compatibility, remaining service life, testing, and warranty must be verified. |
| Certification and compliance | Standard listed equipment or equipment requiring special approvals | +$50–$700 | Testing, listing, labeling, and application-specific approvals can increase manufacturing and purchase costs. |
| Availability and lead time | Standard stock item or special-order configuration | $300–$3,500+ | Special configurations and limited availability can create price premiums and additional shipping costs. |
| Installation and system work | Labor, panel modifications, testing, permits, and possible service upgrades | +$500–$4,000+ | The final project cost may exceed the breaker price because of labor, conductor changes, coordination studies, and local permit requirements. |