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Timeguard TX2440C 40A 30mA Solid Neutral RCBO C Curve 6kA, 30mA Type A, Uni-Directional

Timeguard TX2440C 40A 30mA Solid Neutral RCBO C Curve 6kA, 30mA Type A, Uni-Directional

SKU TX2440C
Β£11.16 - Β£11.16
Β£11.16 inc VAT Β£9.30 exc VAT
Β£11.16 - Β£11.16
Β£11.16 inc VAT Β£9.30 exc VAT inc VAT Β£9.30 exc VAT

Estimated delivery time: Estimated delivery tomorrow*

Description

Timeguard TX2440C 40A 30mA Type A RCBO – C-Curve, 6kA

The Timeguard TX2440C is a 40A, 30mA Type A RCBO with a C-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. Check the complete model specification when ordering a replacement, because other Timeguard 40A RCBOs have different tripping, neutral-switching and power-flow arrangements.

Confirm the three important model details

  • C-curve: a higher instantaneous magnetic operating threshold than an equivalent B-curve device. Selection must account for equipment starting currents and the circuit’s fault-protection requirements.

  • Solid neutral: the neutral remains connected when the protected line pole opens.

  • Unidirectional: the supply and load connections must follow the manufacturer’s markings. This model must not be selected for a circuit requiring bidirectional power flow.

The electrician must also confirm cable protection, consumer unit compatibility and the required isolation arrangement.

Type A protection explained

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. It describes a separate function from the C-curve overcurrent characteristic.

Compact dimensions and clearly specified terminals

The single-module housing measures 18mm wide Γ— 85mm high Γ— 73mm deep and mounts onto a 35mm DIN rail.

Top terminals accept conductors up to 10mmΒ², with a specified tightening torque of 1.2Nm. Bottom terminals accept up to 25mmΒ², 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 RCBO 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.

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Specification
  • Single Pole and Solid Neutral, Type A, C Curve Residual Current Breaker with Overload protection
  • Uni Directional
  • 30mA tripping current and provides protection against earth fault, leakage current, short circuit and overloading
  • 1 module width
  • 35mm DIN rail mounting
  • Terminals have an automatic blanking plate, preventing incorrect termination
  • Can be removed without removing the busbar
  • 5-year guarantee
  • Range - TX circuit protection
  • Manufacturer Product Code - TX2440C
  • Product Type - RCBO
  • Rated Current - 40A
  • Rated Residual Operating Current - 30mA
  • Residual-Current Classification - Type A
  • Overcurrent Tripping Characteristic - C-curve
  • Short-Circuit Breaking Capacity - 6kA
  • Energy Limiting Class - Class 3, as listed in the manufacturer’s brochure
  • Pole Arrangement - Single pole with solid neutral
  • Neutral Switching - Unswitched
  • Directionality - Unidirectional
  • Protection Functions - Overload, short circuit and residual current / earth leakage
  • Rated Voltage - 240V AC, as listed in the datasheet
  • Rated Frequency - 50/60Hz, as listed in the datasheet
  • Module Width - 1 module
  • Mounting - 35mm DIN rail
  • Maximum Top Terminal Capacity - 10mmΒ²
  • Maximum Bottom Terminal Capacity - 25mmΒ²
  • Top Terminal Tightening Torque - 1.2Nm
  • Bottom Terminal Tightening Torque - 2.5Nm
  • Terminal Feature - Blanking plates to help prevent incorrect cable or busbar insertion
  • Test Button - Included
  • Contact Position Indicator - Included
  • Device Removal - Without removing the busbar
  • Electrical Endurance - 4,000 cycles
  • Mechanical Endurance - 10,000 cycles
  • Dielectric Strength - 2500V
  • Housing Material - PA6
  • Height - 85mm
  • Width - 18mm
  • Depth - 73mm
  • Standards Listed - IEC/BS EN 61009-1 and IEC/BS EN 61543
  • Compatibility - Timeguard TX series consumer units only
  • Manufacturer’s Guarantee - 5 years
FAQ's

How do I check whether TX2440C is the correct replacement?

Check the complete existing device code and the consumer unit’s approved-device information. The electrician must also confirm the current rating, residual-current type, tripping curve, neutral arrangement, directionality and circuit requirements.

What is the practical difference between TX2440C and TX2440?

Their overcurrent characteristics differ. C-curve has a higher instantaneous magnetic operating threshold than B-curve. Changing between them requires a circuit-design check; matching the 40A rating alone is insufficient.

Why would someone choose TX2540C instead?

TX2540C has switched neutral and bidirectional operation. TX2440C has solid neutral and unidirectional operation. The required choice depends on the circuit’s isolation and power-flow requirements, together with manufacturer-approved compatibility.

Does C-curve allow a higher continuous load than B-curve?

No. Both 40A versions retain their 40A rated current. The curve describes the overcurrent operating characteristic.

Can C-curve stop tripping when equipment starts?

It may be appropriate where verified starting current is the cause and the circuit supports C-curve protection. It will not correct an overload, damaged wiring or faulty equipment.

Does solid neutral mean the neutral disconnects when the RCBO trips?

No. The protected line pole opens, while the neutral remains connected. The installation’s isolation requirements must be assessed separately.

Can this RCBO be used in a property with solar panels?

The particular circuit and its possible power flow must be assessed. TX2440C is unidirectional and must not be selected for a circuit requiring reverse or bidirectional power flow. Solar elsewhere in the property does not, by itself, establish suitability.

What do 40A, 30mA and 6kA each mean?

40A is the rated circuit current. 30mA is the rated residual operating current of the earth-leakage protection. 6kA is the rated short-circuit breaking capacity. These figures describe separate characteristics.

Why is it described as Type A and C-curve?

Type A describes residual-current detection, including sinusoidal AC and pulsating DC residual currents. C-curve describes the separate overcurrent operating characteristic.

Can it trip even when the load is below 40A?

Yes. Its residual-current function can operate independently of the normal load current. A trip below 40A does not establish that the device is faulty; the circuit and connected equipment need appropriate fault-finding.

Will it fit any consumer unit with a 35mm DIN rail?

DIN rail fit does not establish compatibility. Timeguard specifies this RCBO for its TX series consumer units only. The particular assembly’s documentation must be checked.

What are the terminal capacities and tightening torques?

The top terminals are specified at 10mmΒ² maximum and 1.2Nm. Bottom terminals are specified at 25mmΒ² maximum and 2.5Nm. Follow the device markings and installation instructions.

Does terminal capacity tell me which cable size to use?

No. Cable selection depends on the circuit design, installation method, insulation, grouping, ambient temperature, length and fault-protection requirements. Terminal capacity is a separate connection limit.

Does pressing the test button prove that the complete installation is safe?

No. It operates the RCBO’s internal residual-current test arrangement. It does not replace commissioning tests, inspection or verification of the installation.