Name: Schneider MGNEA9A45D40 Easy9 MCB 1P+N 40A D-Curve - INOSAKI
SKU: Schneider-MGNEA9A45D40
Price: 21.39 USD
Availability: InStock

Technical Overview

1P+N 40A D-curve miniature circuit breaker featuring 4.5kA breaking capacity, thermal-magnetic trip mechanism, and simultaneous phase-neutral isolation.

Key Features

Simultaneous switching of phase and neutral lines in a compact 1P+N configuration
D-curve tripping characteristic optimized for high-inrush inductive loads
Reliable thermal-magnetic trip mechanism for overload and short-circuit protection
Robust endurance with up to 20,000 mechanical and 10,000 electrical operating cycles
Space-saving 18mm modular design equivalent to 2 x 9mm pitches
Distinct visual ON/OFF toggle handle indication with orange accent color
Tunnel terminal connectors supporting wire sizes up to 16 mm² with 2.5 N.m torque

Technical Specification Matrix

Parameter	Value
Product Series	Easy9
Product Short Name	EA9A45
Product Type	Miniature Circuit Breaker (MCB)
Poles Description	1P + N
Number of Protected Poles	1
Neutral Position	Left
Rated Current (In)	40 A at 30 °C
Trip Curve	D
Magnetic Tripping Limit	12 x In +/- 20%
Rated Operational Voltage (Ue)	230 V AC 50 Hz
Network Type	AC
Network Frequency	50 Hz
Breaking Capacity (Icn)	4.5 kA at 230 V AC 50 Hz
Rated Service Breaking Capacity (Ics)	4.5 kA (100% Icn)
Limitation Class	3
Suitability for Isolation	Yes
Control Type	Toggle (Handle)
Local Signaling	ON/OFF indication
Mechanical Durability	20,000 cycles
Electrical Durability	10,000 cycles
Mounting Support	DIN rail
Mounting Mode	Clip-on
Tightening Torque	2.5 N.m
Connections - Terminals	Tunnel type terminal <= 16 mm²
9mm Pitches	2
Standards	IEC 60898-1, GB 10963.1
Product Certifications	CCC
Operating Temperature	-25 to 60 °C
Storage Temperature	-40 to 80 °C
IP Degree of Protection	IP20 conforming to IEC 60529
Physical Weight (kg)	0.12
Dimensions L x W x H (cm)	7.55 x 1.76 x 7.7

Industrial Applications

1. Industrial Fractional Motor & Fan Protection

Protects and isolates single-phase AC motors and high-capacity exhaust fans used in manufacturing environments.

Problem Solved

Electric motors draw a massive initial current during start-up (typically 6-10 times their running current). Standard B or C curve breakers often nuisance-trip. The D-curve magnetic tripping profile of this 40A MCB (tripping at 12x In) prevents false trips while providing full overload protection.

Inrush CurrentMotor ProtectionD-CurveThermal-Magnetic TripEasy9

2. High-Intensity Lighting Panel Circuit Protection

Overcurrent protection for commercial or industrial lighting panels feeding high-intensity discharge (HID) lamp arrays or heavy LED drivers.

Problem Solved

Industrial lighting ballasts and LED power supplies produce extremely high transient capacitive and inductive surges upon turn-on. The 40A capacity handles the sustained load, while the high magnetic threshold of the D-curve rides through the initial inrush peak without interruption.

HID Lighting BallastCapacitive InrushDistribution ProtectionPhase-Neutral Isolation4.5 kA Breaking Capacity

3. HVAC Compressor and Condenser Unit Protection

Safe power distribution and circuit protection for single-phase air conditioning and refrigeration compressor systems.

Problem Solved

Refrigeration compressors draw heavy locked-rotor starting current. Incorporating this 1P+N MCB provides a compact, 18mm DIN-rail solution that prevents nuisance tripping during compressor start-up, while guaranteeing that both the phase and neutral lines are isolated safely in a fault condition, removing dangerous voltage potentials.

Locked-Rotor CurrentHVAC Protection1P+N MCBDIN Rail MountCompressor Protection