Schneider Easy9 EZ9F53340 3 Pole 40A C Curve MCB 3kA Circuit Breaker

The Schneider Electric Easy9 EZ9F53340 Miniature Circuit Breaker (MCB) is a reliable 3-pole thermal-magnetic circuit breaker engineered to protect three-phase low-voltage AC electrical installations against overloads and short circuits. With a 40A rated current and 3kA breaking capacity, this MCB is ideal for residential, commercial, and light industrial distribution systems where dependable three-phase circuit protection is required.

Part of the trusted Schneider Electric Easy9 range, the EZ9F53340 features a C-curve tripping characteristic, making it suitable for circuits with moderate inrush currents such as three-phase motors, pumps, compressors, HVAC systems, lighting, and power distribution circuits. Its thermal-magnetic trip mechanism provides accurate overload protection while delivering rapid interruption during short-circuit conditions.

The breaker offers a 3kA rated breaking capacity (Icu) at 400VAC and complies with SANS 60947-2, ensuring safe and reliable protection for 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 protection against transient overvoltages.

Designed for easy installation, the compact 54mm-wide housing occupies 6 DIN modules and clips securely onto a standard 35mm DIN rail. A built-in contact position indicator allows quick visual confirmation of the breaker status, while durable tunnel-type terminals accept 1mm to 35mm rigid or flexible conductors for secure wiring and simplified installation.

Built for long-term reliability, the Schneider Easy9 EZ9F53340 delivers 10,000 mechanical operations and 4,000 electrical operating cycles, making it an excellent choice for protecting three-phase electrical systems.

Features

Genuine Schneider Electric Easy9 miniature circuit breaker

3-pole thermal-magnetic protection

40A rated current

C-curve tripping characteristic

3kA short-circuit breaking capacity

Protects against overloads and short circuits

Suitable for three-phase AC distribution systems

Contact position indicator

Clip-on DIN rail mounting

Tunnel-type terminals for secure wiring

Long mechanical and electrical service life

Complies with SANS 60947-2

Specifications

Part Number: EZ9F53340

Manufacturer: Schneider Electric

Series: Easy9

Product Type: Miniature Circuit Breaker (MCB)

Number of Poles: 3P

Protected Poles: 3

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: 1-35mm (Rigid/Flexible)

Terminal Tightening Torque: 2N m

Protection Rating: IP20

Dimensions (H × W × D): 81 × 54 × 66.5mm

Weight: 0.30kg

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

Three-phase distribution boards

Commercial electrical installations

Industrial control panels

Three-phase motor protection

Pumps and compressors

HVAC systems

Manufacturing machinery

OEM electrical equipment

Low-voltage AC power distribution

General-purpose three-phase circuit protection

What's in the box
1 x Schneider Easy9 EZ9F53340 3 Pole 40A C Curve MCB 3kA Circuit Breaker