Circuit breaker 3P B-16A 10kA ETI model 002125716

Circuit breaker 3P B-16A 10kA ETI model 002125716 is a three-pole overcurrent protective device intended for three-phase electrical installations. It provides thermal-magnetic protection with type B tripping characteristics and a rated current of 16 A, combined with a short-circuit breaking capacity of 10 kA. The device is suitable for mounting in distribution boards to protect wiring, devices and circuits from overloads and short circuits in residential and light-commercial environments.

Advantages

The ETI three-pole circuit breaker combines compact design with reliable thermal-magnetic operation to ensure selective disconnection of faulty circuits. Type B tripping offers sensitivity to low levels of inrush current while preventing nuisance trips in typical household and light-commercial loads. A 10 kA breaking capacity provides assured interruption capability for common low-voltage distribution networks. The breaker is designed for DIN-rail installation and straightforward integration into standard distribution panels.

Suitable for

• Three-phase residential distribution boards and subpanels
• Light-commercial premises such as offices, small shops and workshops
• Protection of lighting circuits, socket circuits and small motor loads with limited inrush
• Replacement or upgrade of existing three-pole protection devices in standard enclosures

When it may not be suitable

This circuit breaker is not intended for single-pole applications or direct use on DC systems. It may not be appropriate for installations that require higher short-circuit breaking capacity than 10 kA or different tripping characteristics (for example type C or D) needed for heavy motor starts or large inductive loads. For systems with special coordination, selective protection schemes, or higher fault levels, consult an electrical engineer to choose a device with suitable ratings.

Key specifications

• Poles: 3 (three-pole)
• Tripping type: B (thermal-magnetic characteristic)
• Rated current: 16 A
• Short-circuit breaking capacity: 10 kA
• Application: AC low-voltage three-phase circuits
• Mounting: DIN-rail compatible for distribution boards

How to use

Install the breaker on a standard DIN rail within the distribution board, observing correct phase order and secure tightening of line and load terminals to the manufacturer’s recommended torque. Ensure upstream and downstream protective devices are coordinated and that conductor sizes match the rated current. After installation, switch the device to the ON position and verify correct operation by applying the intended load; test the breaker periodically according to local regulations and safety practices.

What to consider before purchase

• Verify that a type B tripping characteristic is suitable for the connected loads and their inrush currents.
• Confirm the system’s prospective short-circuit current does not exceed 10 kA at the installation point.
• Ensure the rated current of 16 A matches the circuit design and conductor sizing.
• Check compatibility with the distribution board space and DIN-rail mounting requirements.

Usage recommendations

Use this ETI 3P B-16A 10 kA breaker for routine three-phase overcurrent and short-circuit protection in domestic and light-commercial panels, and replace only with the same type and ratings to maintain system protection integrity.