Miniature Circuit Breaker ETI S-193 B32A 3P with Neutral (4 modules) B32

The ETI S-193 B32A 3P with Neutral (4 modules) B32 is a three-pole miniature circuit breaker with integrated neutral intended for overcurrent and short-circuit protection in residential and light-commercial electrical installations. With a B characteristic and a rated current of 32 A, this DIN-rail mountable device occupies four modules in a standard distribution board and provides coordinated protection for three-phase circuits including the neutral conductor. It is designed to interrupt fault currents reliably while accommodating typical inrush currents from lighting and small motor loads.

Advantages

The breaker offers standardized snap-on DIN-rail installation and compact 4-module width for efficient use of panel space. Its B tripping characteristic ensures sensitivity to low-magnitude faults and overloads typical for lighting and general-purpose circuits while tolerating short inrush events. Built for three-pole protection with a neutral, it allows simultaneous disconnection of all conductors, improving safety during maintenance and fault conditions.

Suitable for

• Protection of three-phase branch circuits in residential buildings
• General lighting circuits and small power loads with moderate inrush currents
• Distribution boards requiring DIN-rail mount components with a compact footprint
• Light commercial installations where coordinated three-pole isolation is needed

When it may not be suitable

This B32 three-pole breaker is not intended for circuits with heavy motor starting or high inrush currents beyond typical small motors and lighting, where C or D characteristic devices may be more appropriate. It is also not a replacement for residual current devices, surge protection modules, or upstream main protection designed for high fault currents in industrial networks.

Key specifications

• Number of poles: 3 poles plus neutral (3P+N)
• Rated current: 32 A
• Tripping characteristic: B (sensitive to low-magnitude overloads)
• Module width: 4 DIN modules
• Mounting: DIN-rail (EN 60715) compatible
• Application: overcurrent and short-circuit protection for three-phase circuits

How to use

Install the breaker on a standard 35 mm DIN-rail inside a distribution board, ensuring correct orientation and secure snapping into place. Connect the three phase conductors and neutral to the corresponding terminals, following local wiring regulations and ensuring tight, torque-specified terminal connections. Coordinate upstream and downstream protective devices and label the circuit for identification. After installation, perform a functional test by switching the breaker on and off and, if required, simulate an overload condition according to local safety procedures.

What to consider before purchase

• Verify that a B-characteristic device and 32 A rating match the load type and conductor sizing
• Confirm available space: device requires four DIN modules in the panel
• Ensure compatibility with existing distribution board busbars and terminal torque requirements
• Assess whether additional protection (RCD, surge protection) is required for the installation

Usage recommendations

Use this ETI S-193 B32A 3P+N breaker for three-phase circuits with predominantly resistive or low-inrush loads, and pair it with appropriate upstream coordination and residual current protection where required by code.