Schneider Electric A9F74102 Miniature Circuit Breaker

Technical Overview

1-pole 2A C-curve miniature circuit breaker with 50kA breaking capacity, VisiTrip fault signaling, VisiSafe contact separation, and DIN rail mounting.

Key Features

Premium 1-pole thermal-magnetic miniature circuit breaker with a C-curve tripping characteristic
High breaking capacity up to 50 kA at 220-240 V AC conforming to EN/IEC 60947-2
Dual-rated for versatile application in both AC and DC electrical distribution networks
VisiTrip local signaling window reduces downtime by instantly isolating and pointing out the faulted circuit
VisiSafe green indicator strip guarantees physical contact separation for secure downstream servicing
Fast-closing toggle mechanism increases lifespan by limiting arc-flash damage on contact faces
Saves control panel space with a narrow, modular 18 mm width (2 x 9 mm pitches)
Robust mechanical endurance of up to 20,000 operations and electrical durability of 10,000 cycles

Technical Specification Matrix

Parameter	Value
Poles Description	1P
Number of Protected Poles	1
Rated Current [In]	2 A
Tripping Curve	C
Network Type	AC / DC
Rated Insulation Voltage [Ui]	500 V AC conforming to EN/IEC 60898-1
Rated Impulse Withstand Voltage [Uimp]	6 kV conforming to EN/IEC 60947-2
Breaking Capacity [Icu]	50 kA at 220...240 V AC 50/60 Hz conforming to EN/IEC 60947-2
Breaking Capacity [Icn]	6000 A at 230 V AC 50/60 Hz conforming to EN/IEC 60898-1
IP Rating	IP20 conforming to IEC 60529
Mechanical Durability	20,000 cycles
Electrical Durability	10,000 cycles
Operating Temperature	-35°C to 70°C
Mounting Support	DIN rail
Connections - Terminals	Single terminal (top or bottom) rigid wire 1...25 mm² max / flexible wire 1...16 mm² max
Physical Weight (kg)	0.22
Dimensions L x W x H (cm)	7.85 x 1.8 x 8.5

Industrial Applications

1. Low-Current PLC Control Circuit Protection

Industrial control enclosures house vulnerable PLCs, distributed I/O, and specialized controllers. A 2A C-curve breaker is ideal for protecting these systems, offering low-threshold overcurrent safeguarding while allowing for the mild, harmless inrush spikes of control power supplies.

Problem Solved

Prevents catastrophic overcurrent or short-circuit damage to expensive PLC units and instrumentation controllers by providing rapid, low-current interruption.

PLC ProtectionControl Cabinet Protection2A Rated CurrentC CurveOverload Safeguard

2. Universal AC/DC Control Panel Power Distribution

Control panels commonly utilize both AC components and auxiliary DC networks. With robust AC/DC ratings, the iC60N allows engineers to standardize a single circuit protection model for diverse control paths, simplify inventory, and ensure consistent installation layouts.

Problem Solved

Eliminates the complexity and technical risk of deploying incompatible breakers across mixed AC and DC lines in a single switchgear system.

AC/DC DistributionControl Power MCBAuxiliary Bus ProtectionDIN Rail Mounting

3. Field Instrumentation and Sensor Safeguarding

Protects high-value process field devices like pressure, temperature, and flow transmitters. The built-in VisiSafe indicator enables visual maintenance isolation, while the VisiTrip window ensures immediate fault diagnostic tracking in isolated factory zones.

Problem Solved

Minimizes plant downtime during instrument failure through rapid fault localization and guarantees high personnel safety during isolated field device maintenance.

Field InstrumentationVisiSafeVisiTripSensor ProtectionContact Separation