Ampteks Products


Insulated Case

Insulated Case breakers are similar to Molded Case in that they are completly enclosed in a housing made of insulating material. The housing is deigned with two halfs that can be seperated to perform repairs or add accessories. Insulated case breakers have ratings up to 6300A and are available as bolt-in or draw-out construction, as well as several interal accessories.


Every insulated case that leaves our facility is fully refurbished. In addition to NETA/ANSI testing specifications, we measure current, voltage, and timing for all motors, closing coils, UVR’s and shunt trips. This provides you unparalleled data collection and documentation.


If you do not find the breaker for your requiments in our inventory please email or call as we can build out the breaker accessories to your specific application. There is also inventory that has not been entered.

Insulated Case Circuit Breaker

Inventory No: 2650101
Catalog No: MP08H1

400A, 600V, MP08H1, STR58U, LSI, lo Dial, Electrically Operated, Bolt-In, F O SDE MCH MX XF MN (24VDC) PF OF

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Manufacturer Merlin Gerin / Square D
Catalog Number MP08H1
Frame Size 400A
Frame Type MP
Operating Mechanism Electric
Mounting Configuration Bolt-In
Voltage Class 600V
Charge Voltage 120VAC
Close Oil Voltage 120VAC
Shunt Trip Voltage 24VDC
Accessories AUX, 24VDC UVR
Connection Diagrams -
Trip/ Sensor Size 400A
Trip Unit Manufacturer Merlin Gerin
Trip Unit Catalog Number STR58U
Protective Functions LSI
Rating Plug Catalog Number -
Inventory Number 2650101
Location N323L

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