---
product_id: 53539677
title: "MK Electric Sentry 40A Single Pole Type B MCB"
brand: "mk"
price: "R$201"
currency: BRL
in_stock: true
url: https://www.desertcart.com.br/products/53539677-mk-electric-sentry-40a-single-pole-type-b-mcb
store_origin: BR
region: Brazil
---

# 40A high current capacity Lockable operating dolly for safety 35mm² tunnel terminals for robust wiring MK Electric Sentry 40A Single Pole Type B MCB

**Brand:** mk
**Price:** R$201
**Availability:** ✅ In Stock

## Summary

> ⚡ Lock in safety, power up performance!

## Quick Answers

- **What is this?** MK Electric Sentry 40A Single Pole Type B MCB by mk
- **How much does it cost?** R$201 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/53539677-mk-electric-sentry-40a-single-pole-type-b-mcb)

## 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

- • **Powerful 40A Protection:** Handles high current loads with precision to safeguard your setup.
- • **Compact & DIN Rail Ready:** Sleek design fits seamlessly into modern electrical panels.
- • **Secure Locking Mechanism:** Lock the switch On or Off without compromising safety or trip function.
- • **Heavy-Duty Tunnel Terminals:** Supports up to 35mm² cables for professional-grade wiring stability.
- • **Dual Thermal-Magnetic Sensing:** Advanced detection of overcurrents ensures instant, reliable trips.

## Overview

The MK Electric Sentry 40A Single Pole Type B MCB by Honeywell is a compact, thermo-magnetic circuit breaker designed for 230V systems. It features a robust 40A current rating, lockable operating dolly for enhanced safety, and heavy-duty 35mm² tunnel terminals, making it ideal for professional electrical installations requiring reliable overcurrent protection.

## Description

MK Electric Sentry 40A Single Pole Type B MCB

## Features

- Thermo-magnetic 40A single pole 230V type B miniature circuit breaker
- Designed and engineered using thermal and magnetic elements to detect overcurrents
- Operate and interrupt the supply to prevent damage to the installation
- Features tunnel terminals of 35mm² capacity on all ratings
- Operating dolly may be locked in either the On or Off position without affecting the ability of the trip mechanism

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Honeywell |
| Part number | 5940S |
| Item Weight | 110 g |
| Product Dimensions | 1.8 x 7.4 x 8.3 cm; 110 g |
| Item model number | 5940S |
| Colour | White |
| Voltage | 230 Volts |
| Item Package Quantity | 1 |
| Number of Pieces | 1 |
| Plug profile | DIN Rail Mount |
| Included components | 1 x MK Electric Sentry 40A Single Pole Type B MCB |
| Batteries included? | No |
| Batteries Required? | No |

## Product Details

- **Brand:** MK
- **Circuit breaker type:** Standard
- **Mounting type:** DIN Rail Mount
- **Number of poles:** 1
- **Manufacturer:** Honeywell

## Images

![MK Electric Sentry 40A Single Pole Type B MCB - Image 1](https://m.media-amazon.com/images/I/51eW2YojVKL.jpg)

## Frequently Bought Together

- MK Electric Sentry 40A Single Pole Type B MCB
- 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

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**Shop now:** [https://www.desertcart.com.br/products/53539677-mk-electric-sentry-40a-single-pole-type-b-mcb](https://www.desertcart.com.br/products/53539677-mk-electric-sentry-40a-single-pole-type-b-mcb)

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*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-02-21*