FatafatService Logo
No Image Available

L&T (Larsen & Toubro) DN0-160SD

The L&T DN0-160SD is a high-performance 160A four-pole switch disconnector engineered for heavy-duty industrial isolation within the renowned DN Series. Optimized for 415V 3-phase and neutral configurations, this device carries an AC-23A utilization category, making it exceptionally capable of switching highly inductive loads and motors. Built with durable thermoplastic in India, it offers a reliable physical break in the circuit, ensuring safety during maintenance or emergency shutdowns in control panels and distribution boards.

Quick Answer

The DN0-160SD is best used as a primary manual isolator for 160A industrial circuits where 4-pole switching (3P+N) is required, specifically for motor loads or main panel disconnects that do not require internal trip protection.

✓160A High-Current Rating designed for robust industrial power distribution.
✓AC-23A Utilization Category ensures reliable switching of motor and inductive loads.
✓4-Pole Configuration (3-phase + Neutral) for total circuit isolation safety.
✓25kA Breaking Capacity providing high resilience during circuit separation.
✓Dual Mounting Versatility compatible with both standard DIN Rail and Panel Mount setups.

Choose the L&T DN0-160SD if you need a high-quality, 160A 4-pole isolator that complies with AC-23A standards for motor switching. It is the ideal 'Master Switch' for panels where separate protection devices are already installed.

✓ Who Should Buy

  • •Electrical Panel Builders requiring a 160A 4-pole main isolation switch for industrial control boards.
  • •Maintenance Engineers needing a reliable, Made-in-India replacement for worn-out DN series disconnectors.
  • •Industrial Facility Managers looking for a high-utilization (AC-23A) rated switch for motor-heavy environments.

✕ Who Should Avoid

  • •Users looking for an 'All-in-One' device; this model does NOT provide overload or short-circuit protection.
  • •Installers requiring high moisture protection (above IP40) without an additional external enclosure.
Product Overview
The L&T DN0-160SD stands as a benchmark for manual switching in the Indian electrical market. As part of the DN Series, this model is meticulously designed to provide a clear, visible isolation point for electrical systems up to 160 Amps. Its rotary operation mechanism is engineered for a positive-break action, minimizing the risk of contact welding even under significant electrical stress. Encased in an IP40-rated thermoplastic housing, it balances aesthetic panel integration with the ruggedness required for manufacturing environments. Technically, the DN0-160SD is a 'pure' disconnector, meaning it is purpose-built for the act of disconnection rather than circuit protection. It is frequently paired with upstream MCCBs or HRC fuses to create a comprehensive safety strategy. Its screw terminal design ensures high-torque connectivity, which is critical for maintaining low contact resistance in 160A applications, thereby reducing heat generation and extending the lifespan of the switchboard components.

BrandL&T (Larsen & Toubro)
Model NameDN0-160SD
TypeMain Switch Disconnector
SeriesDN Series
Housing MaterialThermoplastic
Country Of OriginIndia
Release Year2010

Related Products

Engineering Analysis
The internal architecture of the DN0-160SD utilizes a rotary-driven cam mechanism that ensures synchronized movement across all four poles. By omitting internal overload and short-circuit trip units, L&T has maximized the internal space for heavy-duty copper contacts and robust insulation barriers. This 'protection-free' design reduces the internal points of failure, making the device incredibly reliable for its intended purpose: isolation. The thermoplastic housing provides a high dielectric strength and thermal stability, ensuring the unit remains structurally sound during high-ambient temperature operations common in Indian industrial settings.

Technical Support & FAQs