IDD Differential 2P 40A 30mA AC Class

The Schneider Electric Acti9 iID A9R81240 residual current circuit breaker is a 2-pole, 40 A, 30 mA sensitivity RCCB designed to detect alternating residual currents and automatically disconnect the circuit when an earth leakage occurs. It belongs to Schneider Electric’s Acti9 range, features type AC differential protection, instantaneous operation, and is designed for single-phase 220-240 V AC, 50/60 Hz networks.

Its 30 mA sensitivity provides additional protection against certain electric shock risks, while the VisiTrip and VisiSafe technologies make it easier to identify tripping events and verify contact status. Its modular 36 mm width makes it easy to integrate into residential, commercial, and professional electrical panels.

2-pole RCCB residual current circuit breaker

The A9R81240 is a pure RCCB residual current circuit breaker with a 2-pole configuration. It is designed to monitor the current flowing through phase and neutral and detect any imbalance caused by an earth leakage.

When the residual current reaches the specified tripping conditions, the device opens the circuit simultaneously, helping reduce risks arising from insulation faults and electric contact.

The neutral is located on the left side of the device.

40 A rated current

The Schneider Electric A9R81240 has a rated current In of 40 A. This current corresponds to the current the RCCB can carry continuously under the conditions specified by the manufacturer.

The 40 A value should not be confused with the residual sensitivity:

• 40 A: rated current of the device.
• 30 mA: rated residual operating current.

Overcurrent protection upstream or downstream must be sized so that the RCCB is not subjected to currents above its permissible rating.

30 mA residual sensitivity

The A9R81240 features a rated residual operating current IΔn of 30 mA. This high-sensitivity level is commonly used to provide additional protection against certain electric shock risks, as well as to detect insulation faults and earth leakage.

30 mA residual protection complements the installation’s protective measures, but it does not replace proper earthing, insulation, equipotential bonding, or the other measures required by applicable electrical regulations.

Type AC RCCB

The residual protection class of the A9R81240 is type AC. It is designed to detect sinusoidal alternating residual currents.

The RCCB type must always be selected according to the connected loads. When installed equipment may generate pulsating DC residual current components or electronic disturbances, it may be necessary to use a type A, A-SI, or another class compatible with the application.

Instantaneous operation

The Schneider Electric Acti9 iID A9R81240 has instantaneous tripping. It does not include an intentional delay like selective RCCBs.

When the leakage reaches the specified operating conditions, the device opens the circuit within the times required by EN/IEC 61008-1.

Voltage-independent tripping technology

Schneider Electric specifies a voltage-independent residual tripping technology.

The residual detection and tripping function does not require an external auxiliary electronic supply to perform its basic protection function.

220-240 V AC rated voltage

The A9R81240 is mainly designed for low-voltage single-phase circuits with the following characteristics:

• Rated operational voltage Ue: 220-240 V AC.
• Frequency: 50/60 Hz.
• Rated insulation voltage Ui: 500 V AC.
• Rated impulse withstand voltage Uimp: 6 kV.

1,500 A residual making and breaking capacity

Schneider Electric specifies a rated making and breaking capacity Im/IΔm of 1,500 A.

This value corresponds to the circuit breaker’s capacity under the specified test conditions and must not be interpreted as the breaking capacity of a miniature circuit breaker.

10 kA conditional short-circuit current

The A9R81240 has a conditional short-circuit current of 10 kA when used with the appropriate overcurrent protection.

This indicates the RCCB’s ability to withstand short-circuit conditions when coordinated with a suitable protective device. It does not mean the RCCB can by itself interrupt a 10 kA short circuit.

Does not protect against overloads or short circuits

The Schneider Electric A9R81240 is an RCCB, and its specific function is protection against residual currents or earth leakage.

It does not include magnetothermal protection against overloads or short circuits. For a complete installation, it must be combined with MCBs, fuses, or other correctly sized overcurrent protection devices.

If a single device is required to provide both residual and overcurrent protection, an appropriate RCBO should be selected instead of an RCCB.

VisiTrip for trip identification

The A9R81240 includes Schneider Electric’s VisiTrip system, with a red mechanical indicator on the front that makes it easy to identify an operation associated with an earth fault.

This indication helps reduce diagnostic time in electrical panels with multiple circuits.

VisiSafe for open-contact verification

The VisiSafe technology uses a green indication to show complete pole opening.

This feature makes it easier to visually check the RCCB status during maintenance work and is complemented by its suitability for isolation in accordance with EN/IEC 61008-1.

Resistance to impulse currents

For this type AC version, Schneider Electric specifies a 250 A resistance to impulse currents.

In installations where frequent transient disturbances or a high risk of nuisance tripping exist, it may be advisable to consider higher-immunity versions, always according to the installation characteristics.

DIN rail mounting

The residual current circuit breaker is designed for clip-on mounting on a DIN rail, which simplifies installation alongside MCBs and other Acti9 modular devices.

Its width is:

• 36 mm.
• 4 x 9 mm modules.
• 2 standard 18 mm modules.

Compact dimensions

• Width: 36 mm.
• Height: 91 mm.
• Depth: 73.5 mm.
• Format: 2 x 18 mm modules.

The bipolar format allows a 40 A, 30 mA residual protection device to be installed using only two modules in the electrical panel.

High-capacity terminals

The Acti9 iID is designed to facilitate reliable conductor connection and features a unified terminal design.

The connection capacities indicated for the range are:

• Rigid conductor: 1 to 35 mm².
• Flexible conductor: 1 to 25 mm².
• Stripping length: approximately 14 mm.
• Tightening torque: approximately 3.5 Nm.

Compatible with Acti9 accessories

The A9R81240 can be integrated with different accessories from the Acti9 platform, depending on the panel’s needs.

These include:

• Padlock locking devices.
• Terminal covers.
• Pole separators.
• Connection accessories.
• Compatible comb busbars and distribution systems.
• Auxiliary Acti9 accessories compatible with iID.

IP20 protection rating

The device has an IP20 protection rating as a standalone component.

Once correctly installed inside a suitable enclosure, the front may achieve a higher protection rating depending on the characteristics of the panel used.

Long service life

The Acti9 iID range is designed to provide high durability in professional electrical installations.

• Mechanical durability: up to 20,000 cycles.
• Electrical durability: up to 15,000 cycles.

These features help maintain reliable operation over a long service life when the device is used within its rated conditions.

Wide temperature range

The Schneider Electric A9R81240 is designed to operate in:

• Operating ambient temperature: approximately -25 to 60 °C.
• Storage temperature: approximately -40 to 85 °C.

Applications of the Schneider Electric A9R81240

The Acti9 iID A9R81240 is intended for circuits where 30 mA type AC residual protection is suitable.

It can be integrated, provided the electrical design and loads are compatible, in:

• Residential electrical panels.
• Single-phase installations.
• Distribution circuits.
• Commercial premises.
• Offices and tertiary buildings.
• Sub-distribution boards.
• Installations requiring high-sensitivity residual protection.

Technical characteristics of the Schneider Electric A9R81240

• Brand: Schneider Electric.
• Reference: A9R81240.
• Range: Acti9.
• Model: iID.
• Type: RCCB residual current circuit breaker.
• Number of poles: 2P.
• Neutral position: left.
• Rated current In: 40 A.
• Rated residual operating current IΔn: 30 mA.
• Residual class: type AC.
• Time delay: instantaneous.
• Tripping technology: voltage-independent.
• Rated operational voltage Ue: 220-240 V AC.
• Frequency: 50/60 Hz.
• Rated making and breaking capacity Im/IΔm: 1,500 A.
• Conditional short-circuit current: 10 kA with appropriate overcurrent protection.
• Rated insulation voltage Ui: 500 V AC.
• Rated impulse withstand voltage Uimp: 6 kV.
• Resistance to impulse currents: 250 A.
• VisiTrip: yes.
• VisiSafe: yes.
• Mechanical earth fault indicator: yes.
• Suitable for isolation: yes.
• Control type: lever.
• Mounting: DIN rail.
• Width: 36 mm.
• Height: 91 mm.
• Depth: 73.5 mm.
• Modular width: 2 x 18 mm modules.
• Rigid conductor: 1-35 mm².
• Flexible conductor: 1-25 mm².
• Tightening torque: approximately 3.5 Nm.
• Protection rating: IP20.
• Mechanical durability: up to 20,000 cycles.
• Electrical durability: up to 15,000 cycles.
• Standard: EN/IEC 61008-1.
• EAN: 3606480392450.

30 mA residual protection for single-phase circuits

The Schneider Electric Acti9 iID A9R81240 combines a 40 A rated current with 30 mA residual sensitivity and type AC protection in a compact bipolar format. VisiTrip makes it quick to locate an earth leakage trip, and VisiSafe makes it easy to visually verify contact opening.

Its modular format, DIN rail mounting, voltage-independent tripping technology, and compatibility with Acti9 accessories make it suitable for residential and tertiary panels where type AC is appropriate for the installed loads.

Important: the A9R81240 is an RCCB residual current circuit breaker. It protects against residual currents, but does not provide overload or short-circuit protection. It must be installed together with correctly sized overcurrent protection devices. In addition, it must be verified that type AC is suitable for the connected loads before installation.