Single-Pole DC Protection – Designed to protect single-pole DC circuits.
Overload Protection – Trips automatically when current exceeds safe limits.
Short-Circuit Protection – Quickly disconnects power during faults.
High Voltage Rating (500V DC) – Suitable for high-voltage DC systems like solar setups.
High Current Capacity (Up to 125A) – Supports heavy DC loads and battery systems.
6kA Breaking Capacity – Safely interrupts high fault currents.
DIN Rail Mounting – Easy installation in electrical panels.
₨ 1,250 ₨ 1,500
The CNC DC 1P MCB 500V 125A YCB1 is a high-performance circuit breaker designed for DC power systems such as solar and battery installations. It provides reliable overload and short-circuit protection, automatically disconnecting the circuit to prevent damage to equipment and wiring. With a 500V DC voltage rating and 125A current capacity, it is suitable for heavy-duty DC applications. Its compact DIN rail design allows easy installation in electrical panels, making it ideal for solar photovoltaic and DC distribution systems.
| Specification | Details |
| Standard | IEC/EN 60947-2 |
| Rated Current In (A) | 125 |
| Number of Poles | 1Pole |
| Rated Working Voltage Ue (V DC) | 500 |
| Rated Impulse Voltage Uimp (kV) | 6 |
| Operation Breaking Capacity Ics (kA) | Pv: 6, PVn: 10 |
| Ultimate Breaking Capacity Icu (kA) | li = 10ln (default) |
| Tripping Type | Thermomagnetic |
| Mechanical Life (times) | 20,000 |
| Electrical Life (times) | PV: 1000, PVn: 300 |
| Polarity | Heteropolarity |
| Inline Methods | Can be up and down the line |
| Storage Temperature (°C) | -35 ~ +70 |
| Working Temperature (°C) | -40 ~ +85 |
| Altitude (m) | Use with derating above 2000m |
| Protection Degree | IP20 |
| Pollution Degree | Level 3 |
| Installation Environment | Places without significant vibration/impact |
| Installation Category | Category III |
| Installation Method | DIN35 standard rail |
| Wiring Capacity | 2.5–50 mm² |
| Terminal Torque | 3.5 NM |
Adjustable Over‑Voltage Protection — Cuts power when phase voltage exceeds the set safe level to protect equipment from high‑voltage damage.
Adjustable Under‑Voltage Protection — Disconnects supply if phase voltage drops below the set threshold to avoid brown‑out damage.
Over‑Current Protection — Protects circuits from over‑current conditions with adjustable current limits.
Three‑Phase Balance & Asymmetry Protection — Detects phase imbalance (asymmetry) and trips to prevent damage to motors and other loads.
Phase Sequence Protection — Ensures correct phase order and prevents reversal faults that can damage three‑phase equipment.
Adjustable Timing Controls — Active time, reconnect delay, and power‑on delay are adjustable to fine‑tune protection response.
Manual Voltage & Current Calibration — Allows precise calibration of measurement ranges to match specific system requirements.
DIN‑Rail Mountable Design — Standard 35 mm DIN‑rail installation for easy panel mounting.
Wide Use Cases — Suitable for industrial, commercial, and residential three‑phase systems to protect motors, compressors, HVAC units, and other loads.
Over-Voltage Protection – Automatically cuts power when the input voltage exceeds a set safe limit.
Under-Voltage Protection – Automatically shuts off power if the voltage falls below the configured threshold.
Over-Current Protection – Trips the socket if the current exceeds the adjustable limit (1–16 A).
Automatic Recovery – Restores power automatically once voltage/current returns to normal after a fault.
Real-Time Voltage & Current Display – Built-in digital display shows live voltage and current readings.
Adjustable Calibration – Voltage calibration adjustable within ±9.5 % for more accurate readings.
Configurable Protection Values – Users can adjust over/under-voltage and over-current trigger levels and delay times.
Factory Reset & Fault Inquiry – Easy reset of settings and ability to check fault history with button presses.
Wide Voltage Range Compatibility – Works with 90–300 V AC supply, suitable for both 110 V and 220 V environments.
Durable Construction & Long Life – Low power consumption (< 2 W) and long mechanical/electrical life (~100,000 operations).
Adjustable Over-Voltage Protection – Cuts off power if voltage rises above your set safe level (e.g., 230–300 V range).
Adjustable Under-Voltage Protection – Disconnects supply when voltage falls below the safe limit (e.g., 140–210 V range).
Adjustable Over-Current Protection – Protects against excessive current with adjustable current range up to 63 A.
Real-Time Monitoring – Built-in voltage meter, ammeter, and energy (kWh) meter for live electrical data.
Delay & Reconnect Settings – Adjustable delay times before protection kicks in and automatic power reconnection after normal conditions return.
Memory of Fault Values – Saves recorded values for over-voltage, under-voltage, and over-current events even after power is off.
LED Indicators – Flashing LEDs show voltage or current protection status when triggered.
DIN-Rail Mountable – Fits easily into electrical panels using a standard DIN rail.
Dual Power Manual Transfer Switch (MTS) – Enables manual switching between two independent DC power sources (e.g., solar array and battery bank) in a PV system for reliable power control.
4P + 4P Pole Configuration – Provides full isolation of both positive and negative poles for each power path, ensuring greater safety and complete DC disconnection when switching.
High DC Voltage & Current Capacity – Typically rated for up to 1000 V DC and 63 A, suitable for a wide range of solar system sizes and off‑grid applications.
Built‑in Overload & Short‑Circuit Protection – Integrated MCB function protects DC circuits from overcurrent and short circuits during normal operation.
Robust Construction – Made with flame‑retardant, durable materials to withstand PV environmental conditions and long‑term use.
Manual Operation with Visual Indicators – Simple hand‑operated transfer and clear on/off indicators help ensure correct switching and safer operation.
DIN‑Rail Mountable – Designed for easy installation in DC combiner boxes, distribution panels, or PV system enclosures.
Suitable for PV & Off‑Grid Systems – Ideal for solar PV installations, battery backup systems, and other DC power networks requiring safe manual source selection.
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