Schneider Easy9 EZ9F53240 2 Pole 40A C Curve MCB 3kA Circuit Breaker

The Schneider Electric Easy9 EZ9F53240 Miniature Circuit Breaker (MCB) is a robust 2-pole thermal-magnetic circuit breaker designed to provide reliable protection against overloads and short circuits in low-voltage AC electrical systems. Rated at 40A with a 3kA breaking capacity, this circuit breaker is ideal for residential, commercial, and light industrial distribution boards where dependable dual-pole protection and circuit isolation are essential.

Part of the trusted Schneider Electric Easy9 range, the EZ9F53240 features a C-curve tripping characteristic, making it suitable for circuits with moderate inrush currents such as lighting, socket outlets, HVAC systems, pumps, compressors, and small motors. Its thermal-magnetic trip mechanism combines precise overload protection with rapid short-circuit interruption to maximise electrical safety.

With a 3kA rated breaking capacity (Icu) at 400VAC, the breaker complies with SANS 60947-2, ensuring reliable protection in modern electrical installations. It also features a 500V rated insulation voltage (Ui), 4kV impulse withstand voltage (Uimp), and Limitation Class 3, providing excellent insulation performance and enhanced protection against transient overvoltages.

The compact 36mm-wide housing occupies 4 DIN modules and mounts easily onto a 35mm DIN rail using a convenient clip-on design. A built-in contact position indicator enables quick visual verification of the breaker status, while durable tunnel-type terminals accept 1mm to 25mm rigid or flexible conductors for secure and straightforward installation.

Designed for long-term reliability, the Schneider Easy9 EZ9F53240 offers 10,000 mechanical operations and 4,000 electrical operating cycles, making it an excellent choice for protecting AC power distribution systems.

Features

Genuine Schneider Electric Easy9 miniature circuit breaker

2-pole thermal-magnetic protection

40A rated current

C-curve tripping characteristic

3kA short-circuit breaking capacity

Protects against overloads and short circuits

Simultaneous isolation of both poles

Contact position indicator

Compact DIN rail clip-on mounting

Tunnel-type terminals for secure wiring

Long mechanical and electrical service life

Complies with SANS 60947-2

Specifications

Part Number: EZ9F53240

Manufacturer: Schneider Electric

Series: Easy9

Product Type: Miniature Circuit Breaker (MCB)

Number of Poles: 2P

Protected Poles: 2

Rated Current (In): 40A

Rated Operational Voltage (Ue): 400VAC, 50/60Hz

Network Type: AC

Trip Technology: Thermal-Magnetic

Trip Curve: C Curve

Breaking Capacity (Icu): 3kA at 400VAC

Service Breaking Capacity (Ics): 3kA (100% of Icu)

Rated Insulation Voltage (Ui): 500VAC

Impulse Withstand Voltage (Uimp): 4kV

Magnetic Tripping Limit: 8.5 × In 20%

Limitation Class: 3

Utilisation Category: Category A

Isolation Function: Yes

Mounting: 35mm DIN Rail (Clip-On)

Terminal Type: Tunnel Type (Top or Bottom)

Cable Capacity: 1-25mm (Rigid/Flexible)

Terminal Tightening Torque: 2N m

Protection Rating: IP20

Dimensions (H × W × D): 81 × 36 × 66.5mm

Weight: 0.20kg

Colour: Grey (RAL 7035)

Mechanical Durability: 10,000 operations

Electrical Durability: 4,000 operations

Operating Temperature: -5 C to +60 C

Storage Temperature: -40 C to +85 C

Compliance: SANS 60947-2, CE, IEC 60529

Applications

Residential distribution boards

Commercial electrical installations

Two-pole AC circuit protection

Lighting circuits

Socket outlet circuits

Air conditioning systems

Pumps and compressors

Industrial control panels

OEM electrical equipment

Low-voltage AC power distribution

What's in the box
1 x Schneider Easy9 EZ9F53240 2 Pole 40A C Curve MCB 3kA Circuit Breaker