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Siemens 5TE2555-1

The Siemens 5TE2555-1 is a heavy-duty, single-pole main switch disconnector from the renowned 5TE2 series, engineered for demanding electrical environments requiring up to 125A of current. Designed as a non-automatic switch, it provides a reliable physical isolation point for single-phase circuits in industrial and commercial distribution boards. Its AC-23A utilization category confirms its capability to handle highly inductive loads, ensuring long-term switching durability under frequent operational stress.

Quick Answer

The Siemens 5TE2555-1 is used for the manual isolation of single-phase electrical circuits up to 125A. It is commonly installed in distribution boards as a master disconnect switch where high-current single-pole interruption is required without integrated overcurrent protection.

✓Robust 125A rated current for high-capacity industrial applications.
✓AC-23A utilization category suitable for switching motor loads and inductive circuits.
✓Compact single-pole (1P) design optimized for DIN rail mounting space efficiency.
✓High-grade thermoplastic housing providing IP40 protection within enclosures.
✓Authentic Siemens German engineering ensures 415V electrical integrity.

Choose the Siemens 5TE2555-1 if you require a high-amperage, single-pole isolation solution from a Tier-1 German manufacturer. It is the gold standard for 125A DIN-rail switching where reliability and motor-load handling are non-negotiable.

✓ Who Should Buy

  • •Electrical panel builders constructing high-current single-phase distribution units.
  • •Industrial maintenance teams requiring reliable AC-23A rated disconnectors for machinery.
  • •Commercial facility managers upgrading to Siemens Sentron series components for standardized safety.

✕ Who Should Avoid

  • •Users looking for integrated short-circuit or overload protection (this is a switch only).
  • •Three-phase applications requiring simultaneous disconnection of all phases.
Product Overview
The Siemens 5TE2555-1 serves as a critical safety component in low-voltage power distribution. As part of the 5TE2 series released in 2010, this switch disconnector features a manual rotary operation mechanism that provides a clear, physical break in the circuit. Unlike standard circuit breakers, this device is specifically intended for isolation and switching; it does not include internal trip units for thermal overload or magnetic short-circuit protection, necessitating its use alongside protective devices like MCBs or fuses. Built for longevity, the unit utilizes high-quality screw terminals that facilitate secure connections for large-gauge cables associated with 125A loads. Its compatibility with standard DIN rail systems allows for seamless integration into existing Siemens Sentron-style panels. The thermoplastic construction is resistant to high temperatures, making it a reliable choice for continuous operation in environments where heat dissipation is a factor.

BrandSiemens
Model Name5TE2555-1
TypeMain Switch Disconnector
Series5TE2
Housing MaterialThermoplastic
Country Of OriginGermany
Release Year2010

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Engineering Analysis
From an engineering perspective, the Siemens 5TE2555-1 excels in contact pressure and arc quenching capabilities within its single-pole architecture. The rotary mechanism is designed for a tactile high-torque throw, preventing 'soft' contact states that lead to arcing and terminal damage. While the breaking capacity (kA) is not applicable as a standalone protection device, its thermal stability at 125A is maintained by high-conductivity copper alloy internal paths and a housing designed to mitigate mechanical deformation under high electrical stress. The IP40 rating ensures protection against solid objects larger than 1mm, ideal for use inside secondary distribution enclosures.

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