High Immunity RCBOs (Type A) for EV, Solar & Noise-Prone Circuits
High Immunity RCBOs are designed to prevent false tripping caused by harmonics, surges, or DC leakage – issues common in EV chargers, solar PV systems, UPS/three-phase setups, and noisy commercial circuits. In practice, “high immunity” refers to enhanced filtering that prevents nuisance tripping caused by harmonics, transient surges, and DC bleed from modern electrical equipment.
Quick answer: A high immunity RCBO is a Type A residual current breaker designed to resist nuisance tripping caused by electrical noise, harmonics, and DC leakage from equipment such as EV chargers, solar inverters, and UPS systems.
Read more
These advanced Type A RCBOs provide full overload and earth leakage protection while filtering out interference that would cause nuisance trips in standard devices. Many models include switched neutrals, twin-action handles, and bi-directional operation for safer, easier installation.
- High immunity design – resists unwanted trips from electrical noise
- Type A protection – detects AC and pulsed DC leakage
- Single, 2-pole & 4-pole options – suited to domestic and commercial boards
- 18th Edition Amendment 2 compliant – trusted for modern installs
Need surge suppression alongside high immunity? Explore our Surge Protection Devices. For shipping details, see our delivery information or returns policy.
IP65 EV RCBO Kit – 32A C Curve A Type + Surge Protection (WPRC32CSP)
£34.16
The WPRC32CSP is a weatherproof IP65 EV RCBO kit equipped with a 32A C Curve Type A RCBO and a factory-fitted Type 2 Surge Protection Device (SPD). It delivers overload, short circuit, AC/DC earth leakage, and surge protection in one compact outdoor-rated enclosure. Designed for...
IP65 EV RCBO Kit – 40A C Curve A Type + Surge Protection (WPRC40CSP)
£34.16
The WPRC40CSP is a heavy-duty IP65 EV RCBO kit equipped with a 40A C Curve Type A RCBO and a pre-fitted Type 2 Surge Protection Device (SPD). It combines overload, short circuit, AC/DC earth leakage, and transient surge protection in a single compact weatherproof enclosure....
8 Way IP65 Enclosure – 32A C Curve Type A RCBO + Surge Protection (WPRC32CSP/8)
£43.35
The WPRC32CSP/8 is an 8 way IP65 plastic enclosure fitted with a 32A C Curve Type A RCBO and integrated Type 2 Surge Protection Device (SPD). Designed for EV charge points, heat pumps, and renewable installs, it provides overload, short-circuit, earth leakage, and surge protection...
8 Way IP65 Enclosure – 40A C Curve Type A RCBO + Surge Protection (WPRC40CSP/8)
£43.35
The WPRC40CSP/8 is an 8 way IP65 plastic enclosure fitted with a 40A C Curve Type A RCBO and integrated Type 2 Surge Protection Device (SPD). Designed for EV charge points, heat pump circuits, and renewable installs, it delivers overload, short-circuit, earth leakage, and surge...
8 Way IP65 Enclosure – 40A B Curve Type A RCBO + Surge Protection (WPRC40BSP/8)
£43.35
The WPRC40BSP/8 is an 8 way IP65 plastic enclosure fitted with a 40A B Curve Type A RCBO and integrated Type 2 Surge Protection Device (SPD). Designed for EV charge points, renewable installs, and outdoor distribution circuits, it provides overload, short-circuit, earth leakage, and surge...
Why Choose High Immunity RCBOs?
Standard RCBOs can trip unnecessarily in environments with high electrical noise – wasting time on callouts and frustrating clients. High Immunity RCBOs are built to avoid this problem, maintaining reliable protection without nuisance disconnections.
Applications
- EV chargers – prevents false tripping from inverter harmonics. A proven option is the A-Type RCBO EV Kit (40A B-Curve).
- Solar PV systems – avoids disruption from DC leakage or backfeed. Many installers use the Single Module High Immunity A-Type RCBO.
- Battery storage & UPS – stable protection for sensitive systems.
- Commercial & industrial boards – reliable operation in noisy electrical environments. For larger setups, see the High Immunity 4-Pole A-Type RCBO.
Key Features
- Resists nuisance tripping – filters out harmonics and DC bleed
- Type A detection – protects against AC and pulsed DC faults
- Bi-directional operation – can be installed either way up
- Switched neutral options – safer isolation and clearer fault indication
FAQs on High Immunity RCBOs
What causes nuisance tripping?
Inverter-driven equipment like EV chargers and solar systems can create harmonics or DC leakage that cause standard RCBOs to trip unnecessarily. High Immunity RCBOs are designed to filter this out.
Are High Immunity RCBOs mandatory?
They are not mandatory under the 18th Edition, but are strongly recommended for circuits with renewables, EVs, or UPS systems where false trips are common.
What’s the difference between a standard Type A RCBO and a High Immunity RCBO?
A High Immunity RCBO uses enhanced filtering to avoid false trips from electrical noise, while a standard Type A RCBO may trip more easily on circuits with inverters or harmonics.
Do High Immunity RCBOs still meet regulations?
Yes – they fully comply with BS EN 61009 and 18th Edition Amendment 2 wiring regulations.
Why Buy From Power & Data UK?
We stock UK-certified High Immunity RCBOs, available with next-day delivery and backed by a 2-year manufacturer warranty. If you need to return an item, see our returns policy. All products are tested and labelled for fast, reliable installation.