Engineered for high-fault environments, the Siemens HQJ23B125H is a 3-pole, 125A molded case circuit breaker. It delivers robust thermal-magnetic protection for demanding commercial and industrial three-phase systems. This bolt-on QJ-frame breaker installs into Siemens P1, P2, and P3 panelboards, as well as compatible switchboards. It is officially replaced by the HQR23B125H model for modern upgrades. With an extra-high 100kAIC rating at 240VAC, this HACR-rated unit supports reverse feeding.
Specifications
Brand
Siemens
Series
HQJ
Part Number
HQJ23B125H
Amperage
125A
Voltage
240VAC
Poles
3
Phase
3
AIC Rating
100kA @ 240VAC
Mounting Style
Bolt-On
Terminal Type
Lugs
For Use With
Siemens P1, P2, P3 Panelboards, Switchboards, Meter Centers, Motor Control Centers
Trip Technology
Thermal Magnetic
Trip Function Code
LI
Trip Function
Long-Time, Instantaneous
Trip Adjustability
Fixed Thermal, Fixed Magnetic
Wire Gauge
6 AWG-300 kcmil (Cu), 4 AWG-300 kcmil (Al)
Max Wire
300 kcmil
Min Wire
6 AWG (Cu), 4 AWG (Al)
Available Options
Shunt Trip, Auxiliary Switch, Alarm Switch
Accessories
Load Side Lugs
Standards
CSA C22.2 No. 5, UL 489
Approval
CSA, UL
Temp Rating
40C
Construction Features
HACR Rated, Reverse Feed, Extra High Interrupting Capacity, Non-Interchangeable Trip, Trip-Free Mechanism, Common Trip
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