Eaton BQL2125 Classic Replacement Circuit Breaker - 10 kAIC
Part Number: BQL2125
Quick Summary
The Eaton BQL2125 is a thermal‑magnetic circuit breaker for bolt‑on panel protection in electrical distribution systems. Engineers often face downtime and compatibility challenges when upgrading or replacing aging protection devices. HACR-rated construction ensures safe HVAC circuit integration, while the device is designed for 120/240 VAC operation. Designed for bolt-on installation, the BQL2125 reduces field retrofit time and minimizes panel downtime during upgrades. With 125 A protection, 120/240 V operation, and a 10 kAIC interrupt rating, it fits standard industrial control architectures and HVAC systems. This aligns with common procurement workflows for replacement parts, accelerating sourcing and ensuring compatible wire sizes (#8-2/0 AWG Cu/Al).
Product Information
Extended Description
BQL2125 Eaton: BQL Classic Replacement Circuit Breakers, Bolt-on, 125A, #8-2/0 AWG, Cu/Al
Product Name
Eaton BAB thermal magnetic circuit breaker
Catalog Number
BQL2125
UPC
622588018804
Product Length/Depth
5 in
Product Height
2 in
Product Width
3 in
Product Weight
0.5 lb
Compliances
HACR Rated
Circuit breaker type
BQL
Number of poles
Two-pole
Type
Classic replacement circuit breaker
Wire size
#8-2/0 AWG Cu/Al
Amperage Rating
125 A
Interrupt rating
10 kAIC at 120/240 Vac
Voltage rating
120/240 V
Feature: Thermal‑magnetic protection provides precise overcurrent control, combining rapid magnetic trip with thermal delay to handle short circuits and overloads. Business Impact: This reduces nuisance trips, minimizes equipment wear, and improves uptime in demanding environments. Application: Well-suited for industrial panels, HVAC controls, and commercial electrical distribution where reliable protection is critical. Feature: Bolt-on, two-pole construction enables quick replacement in existing equipment. Business Impact: Cuts field labor and downtime during upgrades or maintenance, while preserving safety margins. Application: Ideal for legacy Eaton BQL installations and retrofit projects in panelboards and switchgear. Feature: Wire-size compatibility of Cu/Al #8-2/0 AWG enables direct termination on common feeders. Business Impact: Reduces sourcing complexity and wire scoping errors, lowering project risk and installation time. Application: Supports medium to large feeders in industrial power distribution, including HVAC and process equipment. Feature: 10 kAIC interrupt rating at 120/240 VAC provides robust fault current handling. Business Impact: Enhances system reliability and safety by interrupting high fault currents before damage occurs. Application: Suitable for medium‑to high‑risk circuits in panels and switchgear where fault current levels approach the device rating. Feature: HACR-rated construction aligns with HVAC circuit protection. Business Impact: Ensures compliance with HVAC protection standards and simplifies procurement for mechanical installers. Application: HVAC equipment, air handlers, compressors, and other HVAC control circuits within 120/240 V power distribution. Feature: Classic replacement design aligns with legacy Eaton BQL implementations, supporting straightforward procurement. Business Impact: Reduces obsolescence risk and simplifies maintenance with familiar hardware and footprints. Application: Useful for mature facilities and retrofit projects where panel layouts must be preserved.
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FAQs
The BQL2125 is a bolt-on, two-pole replacement designed to fit standard BQL panelboards and Eaton legacy installations. Its 125 A rating and Cu/Al wire compatibility (#8-2/0 AWG) align with common bolt-on geometries, enabling straightforward field swaps without rewiring. The device adheres to the established BQL footprint, reducing panel downtime and ensuring safe, consistent protection across upgrades.
Key electrical specs include a 125 A amperage rating, 120/240 V voltage rating, a two-pole configuration, and a 10 kAIC interrupt rating. The breaker accepts Cu/Al conductors from #8 to 2/0 AWG, supports HACR-rated HVAC circuits, and uses a thermal-magnetic trip mechanism to balance fast response with nuisance-trip resistance.
Use the BQL2125 in industrial control panels, HVAC equipment, and general electrical distributions where medium-to-high fault currents require reliable protection. It serves as a classic replacement for aging BQL devices, enabling panel upgrades without changing upstream protection schemes. Its 125 A rating and 10 kAIC capability make it suitable for medium-load circuits in commercial facilities.
Documentation lists HACR rating as the primary compliance attribute, indicating suitability for HVAC controller circuits. While the data set does not specify additional regional certifications, consult Eaton's official specification sheet for region-specific listings (UL/CSA, CE, or IP ratings as applicable). The BQL2125 is designed to meet common industrial protection requirements for dependable panel protection.
With a robust thermal-magnetic mechanism and bolt-on installation, maintenance needs are minimized and downtime during replacements is reduced. The Cu/Al wire compatibility and standard 125 A rating streamline stocking and field service, lowering total cost of ownership. Its compatibility with existing BQL hardware helps preserve control strategies and reduces retrofit risk in ongoing modernization programs.