A9R12440

What is this device used for?

This is a residual current circuit breaker (RCCB) designed to disconnect the circuit when earth-leakage current is detected, helping to reduce the risk of electric shock and to limit leakage-related hazards in AC distribution systems.

What is the rated current of this RCCB?

The rated current is 40 A, meaning it is intended to carry up to 40 A continuously under specified conditions.

How many poles does it have and what does that mean for installation?

It is a 4-pole device (4P), typically used for three-phase plus neutral applications, allowing simultaneous disconnection of all conductors protected by the RCCB.

What is the rated operational voltage and frequency range?

The rated operational voltage is 380 to 415 V AC at 50/60 Hz, suitable for common three-phase low-voltage distribution in that range.

What earth-leakage sensitivity (trip level) does it provide?

It has a 100 mA residual current sensitivity, meaning it trips when the detected leakage current reaches approximately 100 mA (per applicable standard conditions).

Is the tripping time delayed or instantaneous?

It provides instantaneous earth-leakage protection time delay (no intentional time delay).

What does 'Type AC' mean for an RCCB?

Type AC indicates it is designed to operate with residual currents that are sinusoidal AC. It is typically selected for standard AC loads where pulsating DC leakage is not expected.

Does it require a supply voltage to trip on residual current?

No. It uses voltage-independent residual current tripping technology, so the residual current detection/tripping function does not rely on the presence of line voltage.

Where is the neutral positioned on this device?

The neutral position is on the left, which can be important for consistent wiring practices and panel layout.

How is it mounted in a control panel or distribution board?

It is a clip-on device designed for DIN rail mounting and occupies 8 modules (8 x 9 mm pitches).

What are the physical dimensions and approximate weight?

Approximate dimensions are 91 mm (height) x 72 mm (width) x 73.5 mm (depth), with a net weight of about 0.37 kg.

What conductor sizes can be terminated on the terminals?

It supports single-terminal connections (top or bottom): rigid conductors 1 to 35 mm², flexible conductors 1 to 25 mm², and flexible conductors with ferrule 1 to 25 mm².

What are the recommended wiring preparation and terminal tightening values?

The recommended wire stripping length is 14 mm, and the terminal tightening torque is 3.5 N·m for top or bottom connections.

What ingress protection rating does it have?

The device is rated IP20 (per IEC 60529), and it achieves IP40 when installed within a suitable modular enclosure.

What standards does it comply with?

It is designed in accordance with EN/IEC 61008-1 for RCCBs.

What environmental operating and storage temperatures are supported?

Operating ambient temperature range is -5 to +60 °C, and storage temperature range is -40 to +85 °C.

What is the rated conditional short-circuit current?

The rated conditional short-circuit current is 10 kA, which is used when coordinating the RCCB with appropriate upstream protective devices.

Can the handle be locked in position?

Yes. It supports a padlocking device as a locking option, depending on the installation’s lockout requirements and accessory approach.

What are the insulation and impulse withstand ratings?

The rated insulation voltage is 500 V AC, and the rated impulse withstand voltage is 6 kV.

Is there a visual indication of contact position?

Yes. It includes a contact position indicator to show the open/closed status of the contacts.