Mk Sentry Protection Devices

MK Sentry MCBs (Miniature Circuit Breakers) are of the thermo-magnetic, current limiting type and are available with either Type B or Type C operating characteristics. For the purpose of this brochure we have only listed the Type B devices, the full range can be found in the MK Catalogue. The operating dolly may be locked in either the ON or OFF position without affecting the ability of the trip mechanism to operate. The contacts themselves are manufactured from carefully chosen materials, selected specifically for their low electrical resistance and low propensity to weld under fault conditions. MK SENTRY MCBS LIST NO. DESCRIPTION CURRENT RATING 5903s MCB Single Pole Type B 3A 5906s MCB Single Pole Type B 6A 5910s MCB Single Pole Type B 10A 5916s MCB Single Pole Type B 16A 5920s MCB Single Pole Type B 20A 5925s MCB Single Pole Type B 25A 5932s MCB Single Pole Type B 32A 5940s MCB Single Pole Type B 40A 5945s MCB Single Pole Type B 45A 5950s MCB Single Pole Type B 50A For the full range of MK Sentry MCBs refer to the main MK Catalogue. When the green indicator is visible, a contact gap of 4mm has been achieved, therefore Sentry MCBs may be used as a single pole isolating switch where appropriate. The Sentry MCB has a mid-trip fault indicator. If there is a short circuit or current overload, the dolly moves to the mid-position to indicate a fault