Why You Should Use Square D QOvs RCBOs

The Square D QOvs range from Square D manufactured by leading brand Schneider is a direct replacement of the earlier QOE range. RCBO or, Residual current circuit breaker with override protection, has the characteristics of MCB/RCD, providing protection against current overload, preventing short circuits, and also protection against earth leakage in one pole device. This electrical circuit breaker is also ideal for plug-on mounting. 

One of the fundamental differences between the Square D RCBO from other ranges is that it is black. The older QOE range, which the Square D RCBO replaces, is white.

Product dimensions in millimeters

Unlike the Miniature Circuit Breaker (MCB), which has even three poles, Square D RCBOs generally have only one pole. The single pole Square D RCBOs dimensions are 11cm x 1.9cm x 8.5cm (Height x Width x Depth).

Product characteristics

  1. As the name Square D RCBO suggests, the products combine the expertise of Square D and Schneider. Schneider Electric acquired square D in 1991.
  2. Square D RCBOs comes in three types – type A, B, and C.
  3. The Square D RCBOs generally have one pole. There are however, Square D RCBOs with more than one pole, some even four.
  4. The Amperage rating varies according to part codes. The different Amperage ratings are 6, 10, 16, 20, 32, 40, and 50 Amp.  
  5. Square D RCBOs has three tripping capacities – 10, 30, and 100 mA. Tripping capacity is the maximum current that can pass through the circuit without tripping. 
  6. The voltage rating is 240 volt. This is the highest voltage for which the circuit is designed.
  7. The breaking capacity is 10kA. This is the current that the circuit breaker can interrupt without getting destroyed or causing an electrical arc. 
  8. Square D RCBOs are approved by BS EN 61009-1.

Providing utmost safety

With around 40 years in the industry, Schneider has left no stones unturned to provide utmost safety. The Square D RCBOs ensures:

  • Protection to people against shock by direct contact (10, 30 mA sensitivities),
  • Protection also by indirect contact (100 mA sensitivity),
  • It prevents equipment from catching fire due to leakage of currents. (100 mA sensitivity).
  • When the device trips, the neutral is not interrupted. This makes it is ideal for most circuits, barring those operating under IT or TT earthing.

Advantages of RCBOs:

  • RCBOs ensure a high degree of safety for people handling the circuit distribution and even your appliances.
  • It covers the three main elements of overload, over current, and earth fault protection.
  • As all the bases are covered, you do not need spares like insulation, fuses, material, wire, etc.
  • RCBOs are generally very compact.
  • The procedure to install an RCBO is simple.


  • As RCBOs offer a greater degree of protection, they are costlier than MCBs and RCCBs.
  • You cannot adjust the current range in RCBOs.
  • RCBOs do not operate on DC circuits. It will only provide overcurrent protection and short circuit and not Earth’s fault.