



MK Sentry H8740S 1 Module Single Pole C Curve/Type C Miniature Circuit Breaker MCB 40A 6kA
H8740S
1 Module Single Pole C Curve MCB – Reliable Protection for High Inrush Current Circuits
The 1 Module Single Pole Miniature Circuit Breaker (MCB) with a C Curve rating is designed for applications with higher inrush currents, such as commercial and industrial installations. It provides essential protection against short circuits and overloads, ensuring safe and efficient circuit operation.
- C Curve Tripping Characteristic – Suitable for circuits with high inrush currents, such as motors and transformers.
- 40A Rated Current – Designed for low-power circuits while ensuring reliable protection.
- 6kA Breaking Capacity – Provides effective short-circuit protection, meeting industry safety standards.
- Single Pole Design – Ensures protection for individual circuits within a distribution board.
- Compact & Modular – Space-saving design for easy integration into consumer units and distribution boards.
Technical Specification
- Rated Current: 40A
- Breaking Capacity: 6kA
- Tripping Curve: C Curve
- Number of Poles: 1 (Single Pole)
- Mounting: DIN Rail
- Compliance: BS EN 60898
✅ Ensure robust circuit protection with the 1 Module Single Pole C Curve MCB for demanding electrical applications!

Range | Circpro MK Sentry |
Trip Type | C Curve |
Short Circuit Rating | 6kA |
Cable Capacity | 35 mm2 |
Product | MCB |
Type | Single Pole |
Ingress Protection | IP4X |
Voltage | 230 V |
Pole Configuration | Single Pole (1P) |
Width | 17.5 mm |
Depth | 69.8 mm |
Current Rating | 40A |
Standards | BS EN 60898 |
Number Of Poles | Single Pole (1P) |
Height | 83 mm |
Number Of Modules | 1 |
Delivery Costs
Our standard delivery charge to UK mainland addresses is £5.90 ex-VAT.
Take advantage of FREE* Delivery when you spend over £100 (per order) ex-VAT.
*Delivery charges to JE, GY, TR, BT, IM, IV, HS, KW, ZE and certain PA post codes are £12.00 ex-VAT.
Solar Panels, Batteries and Inverters
Due to their size all solar panels, batteries and inverters orders up to 50 qty will be despatched on a pallet and incur a £120** ex-VAT delivery charge.
**£180 ex VAT to JE, GY, TR, BT, IM, IV, HS, KW, ZE and certain PA post codes.
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