Name: Schneider Electric Acti9 C60H-DC MCB - INOSAKI
SKU: Schneider-A9N61532
Price: 135.07 USD
Availability: InStock

Technical Overview

2-pole, 20A C-curve thermal-magnetic DC miniature circuit breaker rated for 500V DC. Provides 6kA breaking capacity and reliable industrial circuit protection.

Key Features

Designed specifically for DC distribution networks with a rated operational voltage of 500 V DC [1.1.3]
Tripping characteristic C curve optimized for general-purpose and inductive loads (7 to 10 times In)
Two-pole (2P) configuration with two protected poles for comprehensive circuit isolation
High short-circuit breaking capacity of up to 20 kA at 220 V and 250 V DC (Icu conforming to IEC 60947-2)
IP20 degree of protection, rising to IP40 when installed inside a modular enclosure
Fast-closing mechanism independent of manual toggle speed to minimize contact wear and extend lifespan
Fully compatible with standard 35 mm DIN rail installations and Acti9 auxiliaries
Suitability for industrial isolation according to the stringent IEC/EN 60947-2 standard

Technical Specification Matrix

Parameter	Value
Poles Description	2P [1.1.3]
Number of Protected Poles	2
Rated Current (In)	20 A at 25 °C
Network Type	DC
Tripping Curve Code	C
Rated Operational Voltage (Ue)	500 V DC
Rated Insulation Voltage (Ui)	500 V DC conforming to IEC 60947-2
Rated Impulse Withstand Voltage (Uimp)	6 kV conforming to IEC 60947-2
Breaking Capacity (Icu)	6 kA at 500 V DC, 10 kA at 440 V DC, 20 kA at 220 V DC, 20 kA at 250 V DC
Rated Service Breaking Capacity (Ics)	7.5 kA 75% of Icu at 440 V DC, 4.5 kA 75% of Icu at 500 V DC
Magnetic Tripping Limit	7...10 x In
IP Rating	IP20
Mechanical Durability	20,000 cycles
Electrical Durability	3,000 cycles L/R = 2 ms, 6,000 cycles at 500 V DC
Tightening Torque	2.5 N.m top or bottom
Mounting Support	35 mm symmetrical DIN rail
Physical Weight (kg)	0.26
Dimensions L x W x H (cm)	8.1 x 3.6 x 8.5

Industrial Applications

1. Photovoltaic String Overcurrent Protection

Used in solar energy generation installations to protect DC cabling between photovoltaic strings and inverters or combiner boxes. Operating in solar installations requires handling high open-circuit DC voltages (up to 500V DC) and protecting against reverse currents [2.3.8].

Problem Solved

Mitigates the risk of cable damage and fire caused by reverse current flow in multi-string PV arrays by providing thermal-magnetic overcurrent and short-circuit protection at voltages up to 500 V DC with a 6 kA breaking capacity.

Photovoltaic ProtectionSolar Combiner BoxDC String Protection500V DC Circuit BreakerOvercurrent Protection

2. Industrial DC Control Loop Protection

Protects 220V DC and 440V DC auxiliary control power supplies, battery charger systems, and emergency backup battery banks utilized in power substations and critical industrial plants.

Problem Solved

Ensures reliable isolation and prevents short-circuit faults from causing cascading system failures in critical DC control loops. Leverages its 20 kA breaking capacity at 220V DC / 250V DC and C-curve tripping characteristic to handle inrush currents from inductive relay coils without nuisance tripping.

DC Control CircuitBattery Charger ProtectionSubstation Auxiliary PowerThermal-Magnetic MCB220V DC Control Loop

3. DC Motor and Actuator Branch Circuit Protection

Provides overcurrent and short-circuit protection for DC motors, pumps, and actuators in material handling systems, industrial automation lines, and crane systems operating on DC distribution buses.

Problem Solved

Solves the issue of nuisance tripping during DC motor startup. The C tripping curve (7...10 times In) accommodates the high initial inductive inrush currents of DC motors rated up to 20 A while maintaining robust short-circuit defense at up to 500V DC.

DC Motor ProtectionActuator Branch CircuitC-Curve TrippingIndustrial AutomationDIN Rail DC MCB