Schneider Electric 16905 Acti9 RCCB-ID 30 mA Type AC

16905: Acti9 RCCB-ID 30 mA type AC residual current breaker

The 16905 is a Schneider Electric Acti9 residual current circuit breaker, four pole, rated 125 A, with 30 mA earth-leakage sensitivity and a type AC characteristic. The datasheet names it a residual current circuit breaker ID Fi and lists the device short name as RCCB-ID. Seven Star LLC supplies the 16905 in Oman and the GCC as an independent supplier in Muscat, mostly for distribution boards that need a like-for-like replacement or an extension.

The datasheet, generated on 8 Nov 2026, marks the 16905 as discontinued on 27 Mar 2026. It carries no overcurrent release of its own, so it must be backed by suitable short-circuit protection upstream, and stock should be confirmed before ordering.

Information to send with an RFQ for 16905

The points below let us confirm the part number against the datasheet and check stock in one reply.

• Part number this unit and quantity.
• Required sensitivity and class, taken from the old device label.
• System voltage, earthing system and the upstream protection device.
• Board type, available rail space and temperature in the board.
• Whether the discontinued status is acceptable or a current replacement should be proposed.
• Delivery location.

A photo of the front of the existing device is the fastest way to confirm a match.

Technical data of the 16905

Installation of the 16905

The device clips onto a 35 mm symmetrical DIN rail and occupies eight 9 mm pitches, which is 72 mm of rail. Its body is 86 mm high and 76 mm deep and its weight is 420 g. Tunnel terminals accept two flexible or rigid cables of 1.5 to 16 mm², or a single rigid cable up to 50 mm², or a single flexible cable up to 35 mm² (with or without ferrule). Strip 11 mm and tighten to 3 N.m. The connection pitch is 18 mm between phases, and the neutral position is on the left.

Check that all four poles are wired and that the downstream neutrals are not shared with other residual current devices. After fitting this unit, press the test button on the front, because the datasheet points to a regular test as part of maintenance, then record the result in the board log. The toggle is padlockable for isolation during work.

Short-circuit and load limits

An RCCB senses earth leakage but does not clear overloads or short circuits. The datasheet gives a rated making and breaking capacity of 1250 A at 400 V under IEC 61008 and a conditional short-circuit current Inc of 10 kA at 125 A, so an upstream breaker or fuse that limits the fault current to the stated level has to be fitted. Rated operational voltage is 400 V AC at 50 Hz, insulation voltage is 440 V AC, and impulse withstand is 4 kV.

Mechanical durability is 5,000 cycles and electrical durability is 2,000 cycles, which is adequate for a main device that is operated only for maintenance. The device is not intended for frequent switching of loads.

What the 30 mA and type AC ratings mean for the 16905

With 30 mA sensitivity this is the version normally associated with protection of people against indirect contact and as additional protection on socket and final circuits. It is fitted ahead of a group of outgoing circuits in a distribution board, so the rating of 125 A must be coordinated with the board incomer.

Within this group the 16905 is the most sensitive of the four, so it also has the highest chance of nuisance tripping on circuits with a lot of filtered electronics or long cable runs with high capacitance. The datasheet lists the protection time delay as instantaneous and the tripping technology as electromechanical, which means that tripping does not depend on an auxiliary voltage.

Comparing the 16905 with 16905, 16906, 16907 and 16924

These four RCCB-ID units share the 125 A rating, four poles and 72 mm width, and they differ in sensitivity and class.

Where it fits in Oman and the GCC

Four pole RCCBs like this unit are used in main and sub-distribution boards in commercial buildings, workshops, water and desalination facilities and industrial plants. In Gulf installations the choice of sensitivity is usually dictated by the local wiring regulations and the client specification, so confirm the required value before you order a replacement.

Climate limits and enclosure

The datasheet lists IP20 for the device itself and IP40 when it is in a modular enclosure, pollution degree 3 and tropicalisation class 2 to IEC 61008, with relative humidity of 95 % at 55 °C and an operating altitude of 2000 m. The operating temperature range is -25 to 40 °C, with storage from -40 to 85 °C.

The upper operating limit of 40 °C is lower than many Gulf switchrooms reach in summer. Inside a closed board the temperature is higher than ambient, so check the board temperature rather than the room temperature, provide ventilation or air conditioning, and ask us to confirm the datasheet limits for the 16905 if the board runs hot.

Documents and quotation

A copy of the Schneider Electric datasheet for the 16905 is attached on this page for your technical file. It holds the electrical, mechanical and environmental values that are summarised above.

To request a quotation, send the part number and the quantity through the enquiry form and we will reply with availability and delivery terms. Seven Star LLC is an independent supplier and does not act for the manufacturer, so please compare the datasheet with your project requirements before you order.