LK (L&T) DN3B-400D 400A 3-Pole / 36kA MCCB with Thermal Magnetic Release (CM9840100R00G)

LK (L&T) DN3B-400D 400A 3-Pole / 36kA MCCB with Thermal Magnetic Release (CM9840100R00G)

High-Performance 400A MCCB for Industrial Circuit Protection

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

The L&T DN3B-400D (400A) 3-pole MCCB with thermal magnetic release offers advanced circuit protection for industrial and commercial electrical systems. With a rated current of 400A and a breaking capacity of 36kA, this MCCB provides robust defense against overloads and short circuits. Its thermal magnetic release mechanism ensures fast and reliable protection, making it ideal for use in power distribution networks, manufacturing plants, and other high-demand environments. Designed to meet international standards, including IEC 60947-2, the DN3B-400D ensures consistent performance in challenging conditions. With a rated operational voltage of 690V and insulation voltage of 800V, it is built to deliver reliable protection for medium to heavy-duty applications. The compact design allows for easy installation and maintenance, making the L&T DN3B-400D a cost-effective choice for long-term circuit protection.

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

Rated Operational Current	400
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 400A MCCB provides dependable and efficient protection, ensuring safety and performance in industrial and commercial systems.

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

The L&T DN3B-400D 400A 3-pole MCCB (Molded Case Circuit Breaker) with thermal magnetic release is designed to provide advanced protection for industrial and commercial electrical systems. With a rated current of 400A and a breaking capacity of 36kA, this MCCB offers reliable protection from overloads and short circuits, ensuring system stability and safety. It is ideal for use in power distribution networks, manufacturing facilities, and energy-intensive environments. Built to comply with international standards (IEC 60947-2), the L&T DN3B-400D guarantees dependable performance even in challenging applications. Operating at a rated voltage of 690V and insulation voltage of 800V, it is suitable for medium-duty to heavy-duty setups. Its compact design facilitates easy installation and maintenance, making it a cost-effective solution for professionals seeking long-term circuit protection for critical systems.

Why Choose the L&T DN2B-400D 400A MCCB?

The L&T DN3B-400D 400A MCCB is built for high-performance circuit protection, offering advanced thermal magnetic release technology. It is designed to meet global safety standards, providing reliable protection for industrial power systems.