6kA MCB – 16A 1 Pole B Curve (WMC116B)

The WMC116B is a 16 A single-pole 6 kA Miniature Circuit Breaker (MCB) designed for socket and small-power radial circuits. It combines dependable overcurrent and short-circuit protection with a B-curve tripping characteristic that responds at 3–5 × rated current — ideal for domestic and light-commercial loads with low inrush.

Manufactured to BS EN 60898, the WMC116B fits Whitecliffe consumer units and standard DIN-rail enclosures. It offers long mechanical life and precise thermal-magnetic tripping for reliable circuit protection across 8 000 electrical operations.

• 16 A rated current with B-curve (3–5 × In) tripping
• 6 kA breaking capacity at 230/400 V AC
• Single-pole design – 18 mm module width
• DIN-rail mounted for consumer units and distribution boards
• Complies with BS EN 60898 and BS 7671 (18th Edition A2)
• Tested service life: 20 000 mechanical / 8 000 electrical operations
• Contact-position indicator for easy visual status check

The WMC116B provides dependable 6 kA fault protection for socket and small-power circuits. For motor or EV installations requiring greater inrush tolerance, view our C Curve MCB range or upgrade to Type A RCBOs for combined overcurrent and earth-fault protection.

• Part Code: WMC116B
• Type: Single Pole MCB
• Rated Current (In): 16 A
• Curve: B (3–5 × In tripping characteristic)
• Rated Voltage (Ue): 230/400 V AC
• Rated Frequency: 50/60 Hz
• Breaking Capacity (Icn): 6 kA
• Insulation Voltage (Ui): 500 V
• Impulse Withstand Voltage (Uimp): 4 kV
• Dielectric Test Voltage: 2 kV for 1 minute
• Thermal Reference Temp: 30 °C
• Operating Temperature: –5 °C to +40 °C (avg < 35 °C)
• Mechanical Life: 20 000 operations
• Electrical Life: 8 000 operations
• Mounting: 35 mm DIN rail (1 module width)
• Standards: BS EN 60898; BS 7671:2018 (Amendment 2)
• Typical Applications: Socket outlets, ring final and small power radials in domestic or light-commercial systems

Install the WMC116B in a suitable consumer unit or distribution board by a qualified electrician. Always match the rating and curve type to the circuit design.

• Mount securely on 35 mm DIN rail with correct busbar alignment
• Select B-curve for socket or radial circuits with low inrush
• Verify rated current (16 A) and cable size meet design requirements
• Use C-curve devices for motors or compressor loads
• Tighten terminals to manufacturer torque values and log test results on EIC forms

What does 16 A mean on this MCB?

It indicates the breaker’s rated current. The WMC116B will carry 16 A continuously and trip if the circuit exceeds this value beyond its thermal tolerance.

When should I use a 16 A B Curve breaker?

B-curve MCBs trip quickly at low fault multiples (3–5 × In) and are ideal for general socket and lighting circuits without large inrush currents.

Are these compatible with Whitecliffe consumer units?

Yes — the WMC116B fits all Whitecliffe boards and most standard 18 mm DIN-rail enclosures.

Can this be used for outbuilding or garage circuits?

Yes, if installed in a suitable enclosure with appropriate IP rating. Use our IP65 plastic enclosure for external setups.

What if the circuit has motors or compressors?

Choose a C Curve MCB which allows for higher inrush currents (5–10 × In) without nuisance tripping.