--- product_id: 207235812 title: "40 Amp Single Pole Circuit Breaker MCB Type B B40 6kA 40A" brand: "a1 electrics a1electrics.com" price: "€ 22.25" currency: EUR in_stock: true reviews_count: 4 category: "A1 Electrics A1 Electrics.Com" url: https://www.desertcart.sk/products/207235812-40-amp-single-pole-circuit-breaker-mcb-type-b-b40 store_origin: SK region: Slovakia --- # 40A Amperage Compact Size 230V Voltage 40 Amp Single Pole Circuit Breaker MCB Type B B40 6kA 40A **Brand:** a1 electrics a1electrics.com **Price:** € 22.25 **Availability:** ✅ In Stock ## Summary > ⚡ Power Up Your Safety with Style! ## Quick Answers - **What is this?** 40 Amp Single Pole Circuit Breaker MCB Type B B40 6kA 40A by a1 electrics a1electrics.com - **How much does it cost?** € 22.25 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/207235812-40-amp-single-pole-circuit-breaker-mcb-type-b-b40) ## Best For - a1 electrics a1electrics.com enthusiasts ## Why This Product - Trusted a1 electrics a1electrics.com brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **🔒 Safety First:** Equipped with a 6kA breaking capacity for reliable protection. - • **🟢 Clear Indicators:** Red OFF and Green ON indicators for easy status monitoring. - • **🔧 Easy Installation:** Designed for DIN rail mounting, making setup a breeze. - • **📏 Space-Saving Design:** Compact dimensions (9 x 1.8 x 7.5 cm) for efficient installation. - • **🔄 Versatile Compatibility:** Fits seamlessly into A1 Electrics consumer units. ## Overview The Circuit Breaker MCB Single Pole Type B (40A) is a high-performance electrical safety device designed for DIN rail mounting. With a robust 6kA breaking capacity and clear ON/OFF indicators, it ensures reliable protection for your electrical systems. Available in various amperages, this compact breaker is perfect for A1 Electrics consumer units, making it a versatile choice for modern electrical installations. ## Description 1 x Single pole, Type B, 230V (Volt) MCB Circuit Breaker Standard single pole sizeGreen 'ON' Red 'OFF' Status indicationType B 6kAStandard DIN rail mountingBS EN 60898-1All amperage's available: 6, 10, 16, 20, 25, 32, 40, 50 and 63 ampThese circuit breakers will fit in the consumers units with the same brand breakers that are built by a1electricsThose units can be found in our desertcart shop We cannot guarantee that these MCBs will line up to fit with other brands of Circuit Breakers Please check or message us before purchasing Review: 40 amp MCB - I bought this 40 amp MCB for a new welding point in my workshop, fits my single phase consumer unit and seems to be doing its job but time will tell otherwise a recommended item Review: Very satisfied - Nothing much to say....other than it is a good quality product and I have had it fitted for 2 months so far...no problems. ## Features - Circuit breakers can differ between brands, so compatibility isn’t guaranteed. To avoid any issues, please check the photos and compare them to your existing breaker—especially the busbar entry position. If it doesn’t line up, it won’t fit. - Rating: 40 Amp - Max. 9.2kW when used on 230V - Type B: Type B breakers trip (disconnect the circuit) when the current reaches 3 to 5 times their rated current. - Short-Circuit Breaking Capacity: 6kA - 6kA MCBs are typically used in residential settings and small commercial installations where fault currents are generally lower. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0862FV7WW | | Best Sellers Rank | 153,789 in DIY & Tools ( See Top 100 in DIY & Tools ) 241 in Circuit Breakers | | Brand | A1 ELECTRICS A1ELECTRICS.COM | | Circuit Breaker Type | Standard | | Circuit breaker type | Standard | | Country Of Origin | China | | Current Rating | 40 Amps | | Current rating | 40 Amps | | Customer Reviews | 4.5 out of 5 stars 61 Reviews | | Manufacturer | A1 ELECTRICS A1ELECTRICS.COM | | Manufacturer Part Number | B6B1-40 | | Model Number | B6B1 | | Mounting Type | DIN Rail Mount | | Mounting type | DIN Rail Mount | | Number of Poles | 1 | | Number of items | 1 | | Number of poles | 1 | | Voltage | 230 Volts | ## Product Details - **Brand:** A1 ELECTRICS A1ELECTRICS.COM - **Current rating:** 40 Amps - **Circuit breaker type:** Standard - **Mounting type:** DIN Rail Mount - **Number of poles:** 1 ## Images ![40 Amp Single Pole Circuit Breaker MCB Type B B40 6kA 40A - Image 1](https://m.media-amazon.com/images/I/812pJBE-btL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ 40 amp MCB *by A***R on 9 September 2020* I bought this 40 amp MCB for a new welding point in my workshop, fits my single phase consumer unit and seems to be doing its job but time will tell otherwise a recommended item ### ⭐⭐⭐⭐⭐ Very satisfied *by R***R on 14 August 2024* Nothing much to say....other than it is a good quality product and I have had it fitted for 2 months so far...no problems. ### ⭐⭐⭐⭐⭐ easy fit circuit breaker *by J***O on 2 May 2023* came quickly correct part easy fit good price ## Frequently Bought Together - Circuit Breaker MCB Single Pole Type B (All Amps 6A 10A 16A 25A 32A 40A 50A 63A) (40 A) - Schneider Electric Easy9 - MCB Miniature Circuit Breaker, 1 Pole, Type B, 6kA Breaking Capacity, 32A, 230V, EZ9F16132 - Schneider Electric Easy9 - Isolator Switch Disconnector Circuit Breakers, 2 Pole, 63A, 400V, EZ9S16263 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sk/products/207235812-40-amp-single-pole-circuit-breaker-mcb-type-b-b40](https://www.desertcart.sk/products/207235812-40-amp-single-pole-circuit-breaker-mcb-type-b-b40) --- *Product available on Desertcart Slovakia* *Store origin: SK* *Last updated: 2026-05-07*