Fusebox RTA105030B 50A B-Curve Type A RCBO 30mA 10kA 1 Module

This is the Fusebox RTA105030B 50A B-Curve Type A RCBO – 30mA Earth-Leakage & 10kA Overcurrent Protection (Single Module, DIN-Rail) available at SparksDirect.co.uk for the best price. The Fusebox RTA105030B is a Residual Current Breaker with Overcurrent protection (RCBO) that combines both an RCD (Residual Current Device) and an MCB (Miniature Circuit Breaker) into one compact module. This integration offers dual protection for electrical circuits — detecting earth-leakage faults that could cause electric shock, and interrupting overloads or short circuits that could damage wiring or equipment.

Rated at 50A, it is suited for higher-load circuits such as heavy appliances, large socket groups, or dedicated feeds within residential, commercial, and light industrial electrical systems. Its Type A residual current sensitivity (30mA) detects both standard AC leakage and pulsating DC leakage currents produced by modern electronics, enhancing safety.

Equipped with a B-curve tripping characteristic, this RCBO handles typical surge currents without unnecessary tripping while still responding reliably to fault conditions. With a robust 10kA breaking capacity, the RTA105030B is capable of safely interrupting high fault currents.

Features and Benefits

• Dual-function protection: Combines MCB and RCD in one unit for both overcurrent and earth-leakage protection, saving panel space.
• 50A current rating: Suitable for higher-load circuits like large appliances or multiple socket outlets.
• Type A residual current sensitivity (30mA): Detects AC and pulsating DC leakage for improved safety.
• B-curve tripping: Trips between approximately 3–5× rated current, minimizing nuisance tripping on normal inrush currents.
• 10kA breaking capacity: Designed to interrupt high fault currents safely.
• Single-module design: Conserves DIN-rail space in consumer units and distribution boards.
• DIN-rail mountable: Easy installation into standard 35mm DIN rails.
• Compliant with safety standards: Meets BS EN 61009-1 and relevant 18th Edition wiring regulations for modern installations.

Technical Specifications

• Model: Fusebox RTA105030B — Fusebox Type A RCBO (B-curve).
• Device Type: RCBO (Residual Current Breaker with Overcurrent protection).
• Rated Current (In): 50A.
• Rated Voltage: 230V AC, 50/60 Hz.
• Residual Current Type: Type A (detects AC and pulsating DC).
• Residual Trip Sensitivity (IΔn): 30mA (0.03A).
• Tripping Curve: B-curve (3–5× In).
• Rated Breaking Capacity (Icn): 10kA (10 000A).
• Number of Poles: 1P + N (single pole with switched neutral).
• Module Width: 18mm (1 module).
• Mounting: 35mm DIN-rail.
• IP Rating: IP20 (finger-safe interior panel rating).
• Housing Material: PA66 thermoplastic (impact-resistant).
• Standards Compliance: BS EN 61009-1 / IEC 61009-1 and 18th Edition wiring regulations.
• Typical Operating Temperature: - -25 °C to +55 °C (varies slightly by supplier).
• Approx. Dimensions: 114 x 18 x 70mm (height x width x depth).
• Approx. Weight: 0.2kg.

Three Reasons Customers Recommend This

1. Comprehensive protection: Combines residual current and overcurrent safety in one compact RCBO, reducing panel clutter.
2. High-load capacity: 50A rating makes it suitable for larger circuits and demanding electrical loads.
3. Reliable operation: B-curve characteristics and Type A sensitivity deliver dependable performance with modern electronic equipment.

Who Needs It

• Electricians and electrical contractors specifying per-circuit protection, especially for higher-load circuits like sockets or heavy appliances.
• Installers in residential, commercial, or light industrial settings requiring compliant earth-leakage and overcurrent protection.
• Facilities managers and maintenance teams updating older distribution boards to meet modern standards and improve safety.

Who Can Install It

• Qualified electricians or competent electrical installers experienced with DIN-rail consumer units and UK/EU wiring regulations — installation must be done with mains power isolated and compliant with local electrical codes.
• Not recommended for untrained DIYers: Working inside live electrical panels carries serious hazards and should only be performed by trained professionals.

Note: Some images and pictures are for reference only. The item may differ from the image/picture due to manufacturer's change. Should you require the exact item in the picture, please call or email us to enquire.