Timeguard TX2440 40A 30mA Solid Neutral RCBO B Curve 6kA, 30mA Type A, Uni-Directional
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Description
Timeguard TX2440 40A 30mA Type A RCBO – B-Curve, 6kA
The Timeguard TX2440 is a 40A, 30mA Type A RCBO with a B-curve overcurrent characteristic and 6kA breaking capacity. It combines overload, short-circuit and residual-current protection for an individual circuit in a compatible Timeguard TX series consumer unit.
This is the solid-neutral, unidirectional version. Those details matter when ordering a replacement: matching the current rating and physical size alone does not establish that another RCBO is interchangeable.
Check the neutral arrangement and power-flow direction
With a solid neutral, the neutral remains connected when the protected line pole opens. This differs from a switched-neutral device, which also disconnects the neutral.
Unidirectional operation means the RCBO must be connected according to the manufacturer’s supply and load markings. It must not be selected for a circuit requiring bidirectional power flow.
For a new installation or replacement, the electrician must confirm consumer unit compatibility, cable protection, connected equipment and the required isolation arrangement.
What the protection ratings mean
The 40A rating relates to the circuit’s overcurrent protection. The 30mA rating is the rated residual operating current of the earth-leakage protection.
Type A residual-current protection responds to sinusoidal AC and pulsating DC residual currents. B-curve describes the separate overcurrent operating characteristic.
Compact size with clearly specified terminals
The single-module housing measures 18mm wide × 85mm high × 73mm deep and mounts onto a 35mm DIN rail.
Top terminals accept conductors up to 10mm², with a specified tightening torque of 1.2Nm. Bottom terminals accept up to 25mm², with a tightening torque of 2.5Nm. Terminal blanking plates help prevent incorrect cable or busbar insertion.
A test button and contact position indicator are included. The device can also be removed without removing the busbar once the assembly has been safely isolated.
Timeguard provides a five-year guarantee, subject to its applicable terms. Manufacturer compatibility is limited to Timeguard TX series consumer units.