| Parameter | Value |
|---|---|
| Model | NM8NDC-250S |
| Brand | CHINT (Zhejiang Chint Electrics) |
| Product Type | DC moulded-case circuit breaker (DC MCCB) |
| Frame Size / Rated Current | 250S frame, rated current up to 250A (at 40°C) |
| Poles | 1P / 2P / 3P / 4P |
| Rated Operational Voltage (Ue) | DC 250V / 500V / 750V / 1000V |
| Rated Insulation Voltage (Ui) | 1000V |
| Rated Impulse Withstand (Uimp) | 8kV |
| Ultimate Breaking Capacity (Icu) | 50kA |
| Service Breaking Capacity (Ics) | 50kA (100% of Icu) |
| Release Type | Thermal-magnetic (TM), distribution protection |
| Utilization Category | A |
| Mechanical / Electrical Life | 15,000 cycles / 1,500 cycles |
| Operating Temperature | -45°C to +70°C |
| Internal Accessories | Auxiliary contact / alarm contact / shunt release (modular) |
| Connection & Mounting | Front or rear terminals; horizontal or vertical mounting; DIN rail (front) |
| Outline Dimensions (W / H / D) | 40 / 70 / 105 / 140 × 157 × 88.7 mm (1P / 2P / 3P / 4P) |
| Weight | Approx. 2.5 kg (4P) |
| Place of Origin | China |
Order code example: NM8NDC-250S TM 250 4P (frame 250S / thermal-magnetic release / 250A / 4 poles).
Rated operational voltage DC 250/500/750/1000V with 1000V insulation voltage and 8kV impulse withstand, engineered for photovoltaic, energy-storage and DC power systems.
50kA ultimate and service breaking capacity at 100% rating means the breaker clears rated short-circuit faults and remains usable afterwards — critical for high-energy DC circuits.
Thermal-magnetic trip unit provides overload and short-circuit protection for DC distribution, with optional alarm and shunt-release functions for remote supervision.
Rated for -45°C to +70°C operation, suitable for outdoor PV arrays, containerised energy storage and harsh industrial environments.
Choose 1P/2P/3P/4P versions (40-140mm wide) with front or rear connection, horizontal or vertical mounting and DIN-rail option to fit any DC panel layout.
Manufactured by CHINT, one of the world’s leading low-voltage electrical brands. Certificate images and factory test reports are available on request for OEM qualification.
CHINT NM8NDC series is manufactured under international quality and safety standards for DC power distribution. Available certifications and reports include:
CCC — China Compulsory Certification (CHINT low-voltage breakers).
CE — European conformity for DC power distribution components.
RoHS — Restriction of hazardous substances compliance.
ISO 9001 — CHINT quality management system certification.
Factory Test Reports — Breaking, dielectric and endurance test data available on request.
Certificate copies can be supplied for the exact ordered model before shipment.
Solar PV SystemsDC-side protection for PV arrays, string and combiner boxes, and inverter DC inputs in residential, commercial and utility-scale (up to 1000VDC) solar plants. | Energy Storage Systems (ESS)Battery cluster and DC-bus protection in residential, C&I and large-scale energy storage, solar-storage hybrids and containerised BESS applications. |
DC Charging InfrastructureProtection inside DC fast chargers, charging piles and DC distribution units for EV fleets and public charging networks. | Industrial DC & Critical PowerDC bus and rectifier protection, PCS frequency conversion, smart grid, data-centre and other mission-critical DC distribution systems. |
A: It is a CHINT NM8NDC-series DC moulded-case circuit breaker with a 250S frame (rated current up to 250A) and rated operational voltage DC 250/500/750/1000V.
A: 1P, 2P, 3P and 4P versions are available. Outline width is 40mm per pole (40/70/105/140mm for 1P/2P/3P/4P) with 157mm height and 88.7mm depth.
A: NM8NDC is a DC-dedicated MCCB for DC systems up to 1000V (e.g. solar and battery storage DC side). For AC distribution please choose the CHINT NM8 AC MCCB series.
A: The 250S frame offers 50kA ultimate breaking capacity (Icu) and 50kA service breaking capacity (Ics), i.e. 100% of Icu for this breaking code.
A: It uses a thermal-magnetic (TM) trip unit for overload and short-circuit protection and operates from -45°C to +70°C, suiting outdoor PV and container ESS use.
A: Please specify poles, rated current, internal accessories (e.g. auxiliary/alarm/shunt release) and quantity, e.g. NM8NDC-250S TM 250 4P. We will confirm stock and best pricing within 24 hours.
