Description
The 4 Pole RCBO 16A C16 30mA 6kA 400V 3-Phase + Neutral Breaker is an essential component for ensuring electrical safety and efficiency in 3-phase systems. Designed to protect against overloads and earth faults, this breaker is ideal for both residential and commercial applications.
What This Is For
This RCBO is specifically designed to safeguard electrical circuits by combining the functions of a circuit breaker and an RCD. It is suitable for use in industrial environments, commercial buildings, and high-demand residential setups where reliable protection is crucial.
Key Features
- 4 Pole design for comprehensive circuit protection
- Rated current of 16A for handling moderate loads
- 30mA sensitivity for effective earth fault protection
- 6kA breaking capacity to manage short circuits
- Rated voltage of 400V for robust performance in 3-phase systems
Technical Specs
- Type: RCBO
- Poles: 4
- Rated Current: 16A
- Rated Voltage: 400V
- Breaking Capacity: 6kA
- Earth Fault Sensitivity: 30mA
- Dimensions: 4 Bays DIN Rail Mounted
4 Pole RCBO (C16, 30mA) – Technical Capability Breakdown
Right, this is a combined protection device — effectively an MCB + RCD in one unit, designed for 3-phase systems with neutral (4 pole). Here’s what it’s capable of in real-world terms:
Core Electrical Ratings
Current Rating: 16A
Protects circuits up to 16 amps continuous load
Trip Curve: C Curve
Trips at 5–10× rated current (80–160A)
Ideal for mixed loads (motors, transformers, site gear)
Voltage Rating: 400V AC (3-phase)
Suitable for standard UK/EU 3-phase + neutral systems
Breaking Capacity: 6kA
Can safely interrupt fault currents up to 6000 amps
Suitable for most commercial/light industrial boards
Protection Functions (This is where it shines)
Overcurrent Protection (MCB side)
Trips on: Overload (too much current over time)
Short circuit (instant high fault current)
Protects cables from overheating/fire risk
Earth Leakage Protection (RCD side) Sensitivity: 30mA Trip Time: ~0.1s
Trips when current leaks to earth (e.g. damaged cable, human contact)
Important:
30mA = personal protection level
This is what saves lives, not just equipment
4-Pole Switching (Critical Detail)
Disconnects:
L1, L2, L3 (all phases)
Neutral (N)
This is key for:
Balanced isolation
Avoiding floating neutral issues
Full disconnection in fault conditions
Typical Applications
3-phase distribution boards
EV charging infrastructure (especially upstream protection)
Site power / temporary power setups
Workshops with mixed loads
Generator-fed systems
Important Limitations / Considerations
6kA rating
→ Fine for most installs, but not for high fault level industrial sites (you’d want 10kA+)
30mA nuisance tripping risk
→ Sensitive protection = can trip if:
Multiple loads leak small currents
Long cable runs
EV chargers / inverters without proper coordination
Likely Type AC (based on label)
Detects standard AC leakage
Test Function
Orange “Press Monthly” button
Simulates a fault to verify RCD operation
Real-world tip:
If it doesn’t trip → it’s unsafe → replace immediately
Plain-English Summary
This unit is basically your all-in-one safety gatekeeper:
Stops cables burning (overload protection)
Stops massive faults exploding things (short circuit)
Stops people getting electrocuted (earth leakage)
Cuts everything, including neutral, in one go
That makes it ideal for 3-phase distribution where safety matters, especially when you want compact protection in a single module instead of separate RCD + MCB.
Compatibility & Safety Notes
This RCBO is compatible with standard 3-phase electrical systems. Ensure proper installation by a qualified electrician to maintain safety standards. Always adhere to local electrical regulations when using this product.
Frequently Asked Questions
What is an RCBO and how does it work?
An RCBO combines the functions of a circuit breaker and an RCD, providing protection against overloads and earth faults.
Can this RCBO be used in residential settings?
Yes, it is suitable for both residential and commercial applications where reliable circuit protection is needed.
What is the maximum load this RCBO can handle?
The RCBO is rated for a maximum load of 16A, making it ideal for moderate electrical demands.
Is professional installation required for this product?
Yes, it is recommended that a qualified electrician installs this RCBO to ensure safety and compliance with regulations.
What is the significance of the 30mA sensitivity?
A 30mA sensitivity means the RCBO can detect earth faults effectively, reducing the risk of electric shock.
