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The Lauritz Knudsen DN3B-400D MCCB is a high-capacity molded case circuit breaker designed for reliable protection of 3-phase + neutral systems. With a rated current of 400A and a thermal release adjustment range of 320A–400A, it provides precise protection for feeders, distribution panels, machinery circuits, and commercial electrical installations.This model uses a Thermal–Magnetic Release mechanism—the thermal element protects against long-duration overloads, while the magnetic element gives instant response to short-circuit faults. With a 36kA breaking capacity at 415V AC, it ensures safe interruption of high fault currents, making it suitable for demanding industrial and commercial applications.Its rugged molded casing, enhanced arc-quenching system, and stable tripping characteristics ensure long operational life even in harsh electrical environments. Ideal for HVAC systems, plant power distribution, utility boards, and heavy-duty equipment.Buy Lauritz Knudsen DN3B-400D MCCB from Maheshwari Distributors – Genuine product, proven reliability, and fast delivery across India.
Returns will be accepted for up to 10 days of Customer’s receipt or tracking number on unworn items. You, as a Customer, are obliged to inform us via email before you return the item, only in the case of:
– Received the wrong item.
– Item arrived not as expected (ie. damaged packaging).
– Item had defects.
– Over delivery time.
– The shipper does not allow the goods to be inspected before payment.
The returned product(s) must be in the original packaging, safety wrapped, undamaged and unworn. This means that the item(s) must be safely packed in a carton box for protection during transport, possibly the same carton used to ship to you as a customer.
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