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Обзор продукта & Model Breakdown
C125N420FM is a 4‑pole molded case circuit breaker from Schneider Electric’s ComPacT NS1250N series, equipped with a MicroLogic 2.0 блок управления.
It is used for overload and short‑circuit protection in low‑voltage power distribution systems, widely applied in industrial plants, Коммерческие здания, and infrastructure projects.
| Модельный сегмент | Описание |
| C125N | ComPacT NS1250N series, frame size 1250A, breaking capacity 50kA@415VAC |
| 4 | 4‑pole configuration (4П) |
| 20 | MicroLogic 2.0 блок управления (basic protection functions) |
| FM | Fixed mount, manual operation, front connection |
- Core Technical Specifications
| Элемент | Ценить | Примечания |
| Модель | Schneider Electric C125N420FM | Full description: ComPacT NS1250N 4P 1250A 50kA MIC2.0 |
| Frame current | 1250А | Maximum rated operational current |
| поляки | 4 столбы (4П) | 3 фазы + нейтральная защита |
| Trip unit | MicroLogic 2.0 | Long‑time (л), short‑time (С), мгновенный (я) защита |
| Номинальный ток (И) | 1250А | Adjustable via trip unit |
| Ultimate breaking capacity (Ику) | 50kA@415VAC | Complies with IEC 60947‑2 |
| Монтаж | Зафиксированный, front connection | Suitable for standard switchgear |
| Операция | Руководство | With mechanical indication and lockability |
| Номинальное напряжение изоляции (Уи) | 1000ВАК | МЭК 60947-2 |
| Rated operational voltage (Уэ) | 400/415ВАК (50Гц) | Standard 3‑phase voltage |
| Short‑time withstand current (Icw/1s) | 50тот | Ensures system stability during faults |
| Степень защиты | IP30 | Protection against solid foreign objects |
| Емкость проводки | Макс. 300mm² copper | For high‑current loads |
- Функции & Преимущества
- Comprehensive protection
MicroLogic 2.0 provides 3‑stage protection (L‑S‑I) with adjustable settings.
Supports fault diagnostics and alarm output for easy maintenance.
- Efficient design
Green “T” design reduces panel wiring time by 40%.
Ergonomic operating handle for improved safety and comfort.
Modular structure supports accessories: вспомогательные контакты, контакты сигнализации, расцепитель минимального напряжения, и т. д..
- Reliable performance
50kA high breaking capacity for fast fault interruption.
Механическая жизнь: до 10,000 операции; electrical life: до 5,000 операции.
Температура окружающей среды: −5°C to +40°C (full rating), −25°C to +70°C (derated).
- Установка & Приложения
4.1 Требования к установке
Suitable for standard distribution boards with industry‑standard mounting depth.
Front connection for easy wiring and maintenance.
Sufficient heat dissipation space required for stable long‑term operation.
4.2 Типичные применения
Incoming protection for main power distribution boards in industrial plants
Power distribution systems for large commercial complexes
UPS input/output protection in data centers
Critical load protection in infrastructure (больницы, airports, metros)
Main protection for Motor Control Centers (МСС)
- Related Models & Альтернативы
5.1 Derived models in the same series
| Модель | Difference | Приложение |
| C125N320FM | 3 столбы (3П) | 3‑phase loads without neutral protection |
| C125N450FM | MicroLogic 5.0 trip unit | Energy measurement and advanced protection |
| C125N420PM | Draw‑out installation | Easy maintenance without power interruption |
| C125N420RM | Plug‑in installation | Fast replacement for backup equipment |
5.2 Cross‑series alternatives
| Замена | Ряд | Main difference | Справочная цена |
| NSX1250N 4P MIC2.0 | ComPacT NSX | New generation, отключающая способность 65кА | Приблизительно. +10% |
| Masterpact MTZ12 | Masterpact MTZ | Air circuit breaker for higher power systems | Приблизительно. +50% |
5.3 Competitive brand equivalents
| Бренд | Замена | Rating |
| Сименс | 3WL1212‑3CB36‑4GA4 | 1250A 4P 50kA basic protection |
| АББ | Tmax T6H1250 PR221DS‑LSI 4P | 1250A 4P 50kA LSI protection |
| Итон | NZM4‑1250N 4P | 1250A 4P 50kA basic protection |
- Покупка & Usage Tips
- Authentic procurement: Purchase via authorized Schneider Electric distributors or official channels to ensure quality and service.
- Аксессуары: Optional auxiliary contacts, контакты сигнализации, shunt trip, расцепитель минимального напряжения, и т. д..
- Parameter setting: MicroLogic 2.0 can be programmed; adjust according to load characteristics.
- Обслуживание: Routine inspection every 1–2 years, including mechanism, терминалы, and protection functions.
> Примечание: C125N420FM complies with IEC 60947‑2, ГБ 14048.2 and other international & national standards. It is fully compatible with Schneider Prisma E, Blokset and other panel systems.
- Выбор & Replacement Guidelines
- Compatibility Rules
Industrial relay sockets follow international standard dimensions and are interchangeable across brands if:
Pin count matches relay pole number
Номинальный ток (≥10A) meets load
Монтаж (DIN-rail/screw) matches panel design
- Terminal Type Selection
Conventional screw: PTF08A / PTF11A / PTF14A-suitable for low-vibration environments
Finger protection: PTFZ series-suitable for areas with frequent access
Push-In Plus: PTF-PU series-ideal for mass wiring, high vibration resistance
- Модели, снятые с производства
PTF08A-E / PTF14A-E are discontinued with limited stock.
Use PTFZ series as the preferred replacement.
> Примечание: PTF series sockets are rated 10A/250VAC, dielectric strength AC 2000V, operating temp −25 °C to +55 °С, suitable for 0.5–2.5 mm² copper wires.
