Name: Schneider Electric A9N61504 Acti9 C60H-DC MCB 1P 4A - INOSAKI
SKU: Schneider-A9N61504
Price: 89.05 USD
Availability: InStock

Technical Overview

Modular 1P 4A C-curve MCB designed for direct current (DC) overcurrent and short-circuit protection in industrial distribution systems.

Key Features

Dedicated design optimized specifically for direct current (DC) distribution networks and devices
Equipped with C-curve thermal-magnetic tripping mechanism for moderate inductive loads
Provides VisiSafe and VisiTrip functionality for quick visual indication of fault tripping and safe maintenance
Impressive breaking capacity up to 10 kA at 220 V DC and 6 kA at 250 V DC conforming to EN/IEC 60947-2 standards
Robust electrical endurance of up to 6,000 cycles and mechanical endurance of up to 20,000 cycles
Symmetrical 35 mm DIN rail mounting with compatibility for comb busbars

Technical Specification Matrix

Parameter	Value
Poles Description	1P
Protected Poles	1
Rated Current	4 A at 25 °C
Network Type	DC
Trip Unit Technology	Thermal-magnetic
Curve Code	C
Rated Operational Voltage (Ue)	250 V DC
Rated Breaking Capacity	10 kA Icu at 220 V DC, 6 kA Icu at 250 V DC, 20 kA Icu at 110 V DC conforming to IEC/EN 60947-2
Rated Insulation Voltage (Ui)	500 V DC conforming to IEC 60947-2
Rated Impulse Withstand Voltage (Uimp)	6 kV conforming to IEC/EN 60947-2
Tightening Torque	2.5 N.m (power circuit)
IP Degree of Protection	IP20 conforming to IEC 60529, IP40 (inside enclosure)
Ambient Air Temperature for Operation	-25 to 70 °C
Overvoltage Category	IV
Physical Weight (kg)	0.13
Dimensions L x W x H (cm)	7.3 x 1.8 x 8.1

Industrial Applications

1. Solar Photovoltaic String Protection

In solar PV combiner boxes, individual panel strings must be protected against reverse-current faults. The A9N61504 provides 4A current protection at high operational DC voltages (up to 250V DC), making it ideal for solar sub-array isolation.

Problem Solved

Protects PV modules and cabling from thermal damage and fire risks caused by backfed overcurrents from parallel connected strings.

Solar String ProtectionDC Combiner Box250V DC OvercurrentPhotovoltaic Isolation

2. PLC Control Cabinet Power Supply Protection

Industrial PLC systems and sensors often utilize 110V or 220V DC control loops backed by UPS batteries. The 4A rating of this MCB ensures localized branch protection inside high-density control cabinets.

Problem Solved

Prevents localized control circuit short-circuits from drawing excessive current from the main DC bus, isolating the fault without interrupting other critical automation systems.

Industrial AutomationPLC Control LoopDC Control Cabinet110V DC BusVisiTrip Diagnostics

3. Battery Management System (BMS) Aux Protection

Battery energy storage systems (BESS) require precise auxiliary circuit protection for monitoring boards, cooling fans, and safety interlocks that operate on auxiliary DC power lines.

Problem Solved

Safeguards sensitive BMS electronics from damage during DC fault transients and battery overcurrent events with high 6 kV impulse withstand robustness.

Battery Auxiliary ProtectionBESS Auxiliary Control6 kV Impulse WithstandBMS Safety