--- product_id: 51103728 title: "MK Sentry RCBO 50A 6kA 30mA Single Module Type B 6939s New RCB O" brand: "mk" price: "EĀ£ 8555" currency: EGP in_stock: true reviews_count: 2 category: "Mk" url: https://www.desertcart.com.eg/products/51103728-mk-sentry-rcbo-50a-6ka-30ma-single-module-type-b store_origin: EG region: Egypt --- # 50A Power Lockable Feature 6kA Protection MK Sentry RCBO 50A 6kA 30mA Single Module Type B 6939s New RCB O **Brand:** mk **Price:** EĀ£ 8555 **Availability:** āœ… In Stock ## Summary > šŸ”Œ Power Up Your Safety Game! ## Quick Answers - **What is this?** MK Sentry RCBO 50A 6kA 30mA Single Module Type B 6939s New RCB O by mk - **How much does it cost?** EĀ£ 8555 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.eg](https://www.desertcart.com.eg/products/51103728-mk-sentry-rcbo-50a-6ka-30ma-single-module-type-b) ## Best For - mk enthusiasts ## Why This Product - Trusted mk brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - ā€¢ **Robust Design:** 6kA breaking capacity ensures reliability in high-demand environments. - ā€¢ **Trusted Quality:** Conforms to BS EN 61009-1 standards for peace of mind. - ā€¢ **Unmatched Safety:** 30mA sensitivity for ultimate protection against electrical faults. - ā€¢ **Convenient Locking:** Lockable in both ON and OFF positions for added security. - ā€¢ **Compact & Efficient:** Sleek DIN Rail mount design saves space without compromising performance. ## Overview The MKSentry RCBO 50A 6kA 30mA Single Module Type B 6939s is a high-performance electrical protection device designed for home appliances. With a robust 6kA breaking capacity and 30mA sensitivity, it ensures safety against electrical faults while offering a lockable feature for secure operation. Compact and compliant with BS EN 61009-1 standards, this device is perfect for modern electrical systems. ## Description MK Sentry 6939s - 50a - 30mA Type B Single Pole RCBO - Cat No: 6939s - Compact protection devices which combine the overcurrent functions of an MCB with the earth fault functions of an RCCB in a single unit. - A range of sensitivity and current ratings are available for use in domestic installations. - Insulated DIN clip - Complies with BS EN 61009-1 - IEC1009 - Sensitivities (fixed) 30mA - Breaking capacity: 6kA - Flying neutral lead: 200mm - Terminal Capacities 16mm2 rigid, 10mm2 flexible - 1 module devices provide a compact solution for installation in consumer units. - These devices are 1pole & solid neutral. - Operating Voltage, 127-230V AC - Conforms to BS EN 61009-1 Review: To be Tried - Not fitted yet (!) so rating 5 star on basis of as described and a fair price. I have bought it to provide protection for shower cable. - Mk sentry so I expect reliability. Review: Five Stars - Fast as a trips off befor ## Features - MK Electric Sentry 6933s - 50a, 30mA, Type B, 6kA breaking capacity - Conforms to BS EN 61009-1 - Lockable in the ON or OFF position, The device will still operate when locked ON - These devices are 1pole & solid neutral. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00ED07TW0 | | Best Sellers Rank | 912,459 in DIY & Tools ( See Top 100 in DIY & Tools ) 2,482 in Circuit Breakers | | Brand | MK | | Customer Reviews | 3.9 out of 5 stars 4 Reviews | | Manufacturer | MK Electric | | Manufacturer Part Number | 6939s | | Material | Plastic | | Number Of Circuits | 1 | | Number of circuits | 1 | | Phase Type | Single Phase | | Phase type | Single Phase | | Unit Count | 1.0 count | | Unit count | 1.0 count | ## Images ![MK Sentry RCBO 50A 6kA 30mA Single Module Type B 6939s New RCB O - Image 1](https://m.media-amazon.com/images/I/81zKnd9n5ML.jpg) ## Customer Reviews ### ā­ā­ā­ā­ā­ To be Tried *by D***T on 9 September 2017* Not fitted yet (!) so rating 5 star on basis of as described and a fair price. I have bought it to provide protection for shower cable. - Mk sentry so I expect reliability. ### ā­ā­ā­ā­ā­ Five Stars *by K***Y on 22 June 2015* Fast as a trips off befor ## Frequently Bought Together - MK Sentry RCBO 50A 6kA 30mA Single Module Type B 6939s New RCB O - MK Electric Sentry 32A Single Pole Type B MCB - DIN Rail Enclosure, Consumer Unit Box IP65 Waterproof, DIN Rail Box 5 Module, With 4 Terminals, 2 Connectors, Suitable for Outdoor Gardens, Farms, Charging Stations, Wet Rooms --- ## Why Shop on Desertcart? - šŸ›’ **Trusted by 1.3+ Million Shoppers** ā€” Serving international shoppers since 2016 - šŸŒ **Shop Globally** ā€” Access 737+ million products across 21 categories - šŸ’° **No Hidden Fees** ā€” All customs, duties, and taxes included in the price - šŸ”„ **15-Day Free Returns** ā€” Hassle-free returns (30 days for PRO members) - šŸ”’ **Secure Payments** ā€” Trusted payment options with buyer protection - ā­ **TrustPilot Rated 4.5/5** ā€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.com.eg/products/51103728-mk-sentry-rcbo-50a-6ka-30ma-single-module-type-b](https://www.desertcart.com.eg/products/51103728-mk-sentry-rcbo-50a-6ka-30ma-single-module-type-b) --- *Product available on Desertcart Egypt* *Store origin: EG* *Last updated: 2026-06-07*