Checking hours…Mon–Fri 7:30am–5pm · Sat 9am–12pm01302 279234Trade account
Lewden RCBO10-40/30/1M/B SP Type B 40A 30mA 10kA RCBO

Electrical Range

Lewden RCBO10-40/30/1M/B SP Type B 40A 30mA 10kA RCBO

Lewden RCBO10-40/30/1M/B single-module Type B RCBO rated 40A with 30mA earth leakage protection and 10kA breaking capacity.

At a glance

  • Also known as 8011946
Manufacturer part no.
RCBO10-40/30/1M/B
Showing prices

£51.78

£43.15 ex. VAT · VAT at 20%

Available to order · 7 working days
Available to order · 7 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question

Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

The Lewden RCBO10-40/30/1M/B is a single-pole, single-module residual current breaker with overcurrent protection (RCBO) for use in consumer units and distribution boards. It combines 40A overload and short-circuit protection with 30mA earth leakage protection in one device. The Type B curve and 10kA breaking capacity suit standard domestic and light commercial final circuits.

Before you order

  • Confirm the 40A current rating matches the circuit design and cable capacity.
  • Check that 30mA earth leakage protection is appropriate for the circuit.
  • Verify the Type B trip curve and 10kA breaking capacity suit the load and prospective fault current.
  • Ensure a single-module SP device fits the available ways in the consumer unit.

Not sure which part?

Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.