LK (L&T) DN3B-400D 250A 3-Pole MCCB with Thermal Magnetic Release (CM9840100Q00G)

LK (L&T) DN3B-400D 250A 3-Pole MCCB with Thermal Magnetic Release (CM9840100Q00G)

High-Performance 250A MCCB for Industrial Circuit Protection

Technical Specifications of L&T DN3B-400D 250A MCCB

The L&T DN3B-400D (250A) 3-pole MCCB with thermal magnetic release provides advanced protection for industrial and commercial electrical systems. With a rated current of 250A and a breaking capacity of 36kA, this MCCB offers reliable defense against overloads and short circuits. The thermal magnetic release mechanism ensures a fast and efficient response to electrical faults, making it ideal for power distribution systems, manufacturing plants, and other energy-intensive environments. Designed to meet global standards such as IEC 60947-2, the DN3B-400D is built to deliver consistent performance in demanding conditions. With a rated operational voltage of 690V and insulation voltage of 800V, it ensures long-term protection for medium to heavy-duty applications. The MCCB’s compact design allows for easy installation and maintenance, making it a cost-effective solution for long-term circuit protection in industrial setups.

Technical Specifications of L&T DN3B-400D 250A MCCB

Rated Operational Current	320
Mechanical Life (No. of operating cycles)	10000
No. of Poles	3P
Rated Operational voltage (Ue)	415V AC
Rated Insulation Voltage Ui (V)	800 V
Conformance to Standards	IEC 60947-1, EN 60947-1, IS/IEC 60947-1 IEC 60947-2, EN 60947-2, IS/IEC 60947-2 IEC 60947-3, EN 60947-3, IS/IEC 60947-3 IEC 60947-4, EN 60947-4, IS/IEC 60947-4
Rated impulse withstand voltage (Uimp)	8 kV
Operational Frequency (Hz)	50/60 Hz
Release Type	TM
Rated Short Circuit Breaking capacity Icu(kA)	DN3B MCCB 320 3P 415V AC 36kA Thermal Magnetic 50/60 Hz
Rated Sevice circuit breaking capacity (Ics as % of Icu) @415VAC	36kA
Ambient temperature	-5°C to 55°C
Suitable for isolation	Yes
Load-line bias	No
Electrical Life (Operating Cycles)	4000
IP Protection	IP40
Pollution Degree	III
Width(mm)	140
Height(mm)	205
Depth(mm)	111

The L&T DN3B-400D 250A MCCB ensures reliable performance and safety for industrial applications, adhering to global standards for circuit protection.

Overview of L&T DN3B-400D 250A 3-Pole MCCB

The L&T DN3B-400D 250A 3-pole MCCB (Molded Case Circuit Breaker) with thermal magnetic release is engineered to deliver advanced circuit protection for industrial and commercial electrical systems. With a rated current of 250A and a breaking capacity of 36kA, this MCCB provides reliable protection against overloads and short circuits, ensuring the safety and stability of your power distribution systems. Designed for use in manufacturing facilities, power plants, and other energy-intensive environments, the L&T DN3B-400D is compliant with international safety standards (IEC 60947-2), offering dependable performance in challenging conditions. Its rated operational voltage of 690V and insulation voltage of 800V ensures consistent protection for medium-duty to heavy-duty applications. This MCCB's compact design makes it easy to install and maintain, offering long-term reliability for professionals seeking durable circuit protection solutions.

Why Choose the L&T DN3B-400D 250A MCCB?

The L&T DN3B-400D 250A MCCB provides robust circuit protection with its advanced thermal magnetic release technology. It is ideal for industrial systems requiring reliable and efficient performance, meeting global safety standards for electrical protection.