The Schneider Electric EZ9F34220 is a 2-pole miniature circuit breaker from the Easy9 range, rated at 20 A with a C-curve trip characteristic (magnetic tripping between 5 and 10 times In). The breaker is rated for distribution applications and conforms to IEC 60898-1.
Breaking capacity and voltage ratings
Breaking capacity is 4.5 kA Icn at both 230 V AC and 400 V AC (50/60 Hz) per IEC 60898-1. Rated operational voltage is 400 V AC, insulation voltage 500 V AC, and impulse withstand voltage 4 kV.
Terminal and mounting details
Tunnel-type terminals accept 1 to 25 mm² rigid or 1 to 16 mm² flexible wire, torqued to 2 N·m. The breaker clips onto standard DIN rail, occupies 36 mm width (4 x 9 mm pitches), and stands 81 mm tall by 66.5 mm deep. The toggle handle provides local on/off control with a contact position indicator. IP20 finger-safe protection covers the terminals.
Environmental and durability specs
Rated for ambient operation from -25 to 60 °C, storage from -40 to 85 °C, with 95% relative humidity tolerance at the upper end. Mechanical durability is 10,000 cycles, electrical 4,000 cycles — typical for a residential or light-commercial MCB in this class. Pollution degree 2 and tropicalisation class 2 suit it for controlled indoor environments.