Type B – Fast-acting (Lighting Type)
Commonly known as the lighting type.
Suitable for resistive loads such as lighting and sockets.
Fast tripping.
Trips at 3–5 × In (instantaneous trip threshold).
Type C – Motor Type (Medium-delay)
Also known as the motor type.
Suitable for loads with moderate inrush current such as small motors and pumps.
Moderate delay compared to Type B.
Trips at 5–10 × In.
Type D – Slow-acting (Industrial Type)
Known as the industrial / slow-acting type.
Used for high inrush current equipment such as transformers and large motors.
Trips at 10–20 × In.
Type K – Inductive Load Type
Designed for inductive loads with higher starting current.
More sensitive to overload than Type D.
Trips at 8–12 × In.
Type Z – Ultra-fast, Highly Sensitive
Very sensitive and ultra-fast tripping.
Ideal for electronic circuits, PLC, automation, and control systems.
Trips at 2–3 × In.
