• AC circuit breaker
• Hydraulic-magnetic technology
• 100% rating capability, independent of ambient temperature
• One, two, three pole, 1+N and 3+N
• Ratings 0.5 to 63 A (subject to certification)
• Optional shunt trip (IEC / EN 60947-2)
• Available in various currents and time delays
• Precision tripping characteristics
• Trip indication with mid-trip position
• Reset immediately after overload
• Dual mount product in black shells
• Suitable to use for electrical isolation


• AC branch circuit protection (IEC / EN 60947-2)
• Supplementary protection
• Telecom / datacom equipment
• Lighting control
• UPS equipment
• Alternative energy equipment
• Mobile power generation equipment
• Railway signalling equipment
• Residential equipment
• Industrial equipment

Technical data

Name QF-(1,2,3)(19) QF-(1,2,3)(26) 
Number of poles 1P,2P,3P
Operating Voltages 240VAC/415VAC
Minimum Current Rating 0.5A
Maximum Current Rating 63A
Interrupting Capacity 5KA
Operating Temperature Range -40 ℃ to +85 ℃
Time Delay Curves 1,2
Endurance10000 operations - 1500 electrical at rated current and voltage (IEC 60947-2)
Dielectric Strength1480 V (single pole) / 1830 V (multi pole), 50 Hz for one minute after testing
Humidity35 to 85% relative
Pollution DegreePD2 - Normally only non-conductive pollution occurs.
Temporary conductivity caused by condensation is to be expected.
Wire Size(mm²) 0.75-30mm² 1-50mm²
Torque 2.5Nm 4Nm