Ireland 
Load break switch 4P 125A HA451
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Optional accessories
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Auxiliary contact block 1 products available -
Terminal cover 1 products available -
Switch operating shaft 2 products available -
Door coupling handle for switchgear 2 products available
Technical properties
Electric current
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Rated current125 A
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Rated short-time withstand current Icw IEC 609477 kA
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Acceptable current rating AC21125 A
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Acceptable current rating AC21 category A125 A
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Acceptable current rating AC21 category B125 A
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Acceptable current rating AC22 category A125 A
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Acceptable current rating AC22 category B125 A
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Acceptable current rating AC23 category A125 A
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Acceptable current rating AC23 category B125 A
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Rated short-circuit making capacity Icm under 415 V AC according to IEC 60947-311.90 kA
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Rated short-time withstand current Icw 1s IEC 609477 kA
Architecture
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Number of poles4
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Control/operation elementLong rotary handle
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Device construction typeFixed built-in
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Type of pole4P
Dimensions
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Height135 mm
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Width120 mm
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Depth170 mm
Cover, door
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InterlockableYes
Safety
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Ingress Protection (IP) classIP00
Connection
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Cross-section rigid conductor50 mm² max.
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Cross-section flexible conductor50 mm²
Voltage
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Rated insulation voltage Ui800 V
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Rated impulse withstand voltage Uimp8,000 V
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Rated operational voltage Ue380 - 415 V
Power
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Power loss per pole at In1.80 W
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Total power loss under IN5.40 W
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Rated operational power under 400 V AC AC182,000 W
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Rated operational power under 400 V AC AC2356,000 W
Controls and indicators
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Motor drive integratedNo
Use conditions
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Operating temperature-20 - 70 °C
Frequency
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Frequency50 - 60 Hz
Functions
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Is reversing switchNo
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Version as emergency stop installationNo
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Version as main switchYes
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Version as maintenance/service switchYes
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Version as safety switchYes
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Version as switch disconnector compactYes
Equipment
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Motor drive optionalNo
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Number of auxiliary contacts as change-over contact0
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Number of auxiliary contacts as normally closed contact0
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Number of auxiliary contacts as normally open contact0
Installation, mounting
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Nominal tightening torque9 - 9.9 Nm
Environmental value
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Certifications and documents
Downloads
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Product image
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Product datasheet
Hager Product data sheet HA451
Load break switch 4P 125A
PDF -
Declaration of conformity
Declaration
Declaration of conformity International 2022-04-13
PDF777,14 kB
EU Declaration of Conformity
Declaration of conformity en-GB 2025-11-21
PDF611,04 kB
More documentation
