Arc Fault Detection A-Type RCBO – WFD132B-030 (32A, B Curve, 30mA)

The WFD132B-030 is a 32A, B Curve Arc Fault Detection (AFDD) RCBO, combining arc fault detection, 30mA Type A residual current protection, short-circuit, and overload protection in one compact unit. Fully compliant with BS 7671:2018 (18th Edition), it offers a reliable fire-safe solution for demanding circuits.

Unlike standard RCBOs, this AFDD model features advanced microprocessor-driven arc detection technology. It continuously analyses waveforms and trips when worn insulation, loose terminals, or appliance faults generate dangerous arcs. Both live and neutral conductors are isolated instantly for maximum circuit safety.

Protective Coverage

This AFDD RCBO offers:

• Arc fault detection – both series and parallel
• Residual current protection – Type A, 30mA (AC + pulsed DC)
• Overcurrent protection – overload and short-circuit
• Overvoltage protection – trips at 275V ±5%

Variant Comparison

• SKU: WFD132B-030
• Type: AFDD + Type A RCBO
• Rating: 32A
• Curve: B
• Residual Current Sensitivity: 30mA
• Breaking Capacity: 6kA
• Operating Voltage: 230V AC, 50Hz
• Arc Fault Detection: Series & Parallel faults
• Additional Protection: Overload, short circuit, earth leakage, overvoltage (275V ±5%)
• Isolation: Disconnects live and neutral (switched neutral)
• Mounting: 1 module DIN rail
• Dimensions: 17.8 × 116 × 76 mm
• Compliance: BS EN 61009-1, BS EN 62606, BS 7671:2018 (18th Edition)

Installation must be performed by a qualified electrician in line with BS 7671. AFDD RCBOs are strongly recommended in circuits where fire risk is heightened, such as HMOs, rentals, and commercial environments.

• 32A version is best for high-load appliances and socket circuits
• For single-phase 230V AC systems only
• 1 module DIN rail (17.8mm width)
• Not for use on DC networks
• Compatible with WCED consumer units and distribution boards

What is the 32A AFDD RCBO best for?

It is designed for high-load circuits, socket outlets, and commercial applications requiring advanced arc fault protection.

Does this unit isolate both conductors?

Yes – the switched neutral feature ensures both live and neutral conductors are disconnected.

Is this AFDD RCBO compliant with UK wiring standards?

Yes – fully compliant with BS 7671:2018+A2 and certified to BS EN AFDD/RCBO standards.

What sets it apart from a standard 32A RCBO?

Unlike a standard RCBO, it detects arc faults caused by faulty wiring, damaged insulation, or poor connections – major fire risks.

What other ratings are available?

The WFD1 Series also includes 6A, 10A, 16A, 20A, and 40A variants. This page covers the 32A WFD132B-030.