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Siemens 3WN6521-0JB05-3KA1 Fixed-Mounted Circuit Breaker - 2000A

Siemens 3WN6521-0JB05-3KA1 3-pole, 2000A fixed-mounted circuit breaker.

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ManufacturerSiemens
Part number3WN6521-0JB05-3KA1
Poles 3
Rated Current 2000A
Voltage 690V AC
Frequency 50/60 Hz
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Fixed-mounted design 2000A rated current 80kA breaking capacity Mechanical lockout device Tripped signaling switches Multiple auxiliary releases

The Siemens 3WN6521-0JB05-3KA1 is a fixed-mounted, 3-pole circuit breaker designed for demanding industrial applications. It features a rated current of 2000A and operates at voltages up to 690V AC with a frequency of 50/60 Hz. This breaker offers a high breaking capacity of Icu=80 kA at 500V and includes essential safety features such as a ready-to-close signaling switch, mechanical lockout device, and tripped signaling switches with indicators.

Ideal for power distribution and protection in heavy industries, this circuit breaker ensures reliable operation in environments requiring robust safety and control. Its versatile connection options (top, front, bottom front) and double-hole terminals facilitate flexible installation. The integrated overcurrent release (AZN Version B) with an adjustable setting range of 800-2000A, manual operating mechanism, memory, mechanical latching, and auxiliary releases (undervoltage, instantaneous) provide comprehensive protection and operational control.

Source your Siemens 3WN6521-0JB05-3KA1 from Stanlo Automation, a veteran-owned distributor committed to providing quality surplus industrial parts. We understand the critical nature of automation components and ensure that our products meet the rigorous demands of your operations, offering reliability and value.

Poles3
Rated Current2000A
Voltage690V AC
Frequency50/60 Hz
Breaking Capacity (Icu)80 kA at 500V
Release TypeAZN Version B
Setting Range800-2000A
Auxiliary ReleasesUndervoltage, Instantaneous
SignalingReady to close, Tripped
Industrial power distribution
Heavy manufacturing
High-current applications
Control panels
Machine protection
Electrical substations
Siemens industrial control systems Medium-voltage distribution panels
Siemens 3WN6 Circuit Breaker 3WN6 2000A breaker
This part is a high-capacity circuit breaker and is typically part of a larger system. Consult the Siemens 3WN series documentation for specific compatibility information.
Expert tip
Ensure proper busbar and terminal connection for the 2000A rating, using the specified double-hole configuration for secure, low-resistance contact.
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What is the breaking capacity of the Siemens 3WN6521-0JB05-3KA1 circuit breaker?
The Siemens 3WN6521-0JB05-3KA1 circuit breaker has a breaking capacity (Icu) of 80 kA at 500V. This high rating ensures it can safely interrupt fault currents in demanding industrial environments.