- Model Interpretation and Basic Information
| Элемент | Подробности |
| Полная модель | 3RT1024-1BB40 |
| Серия продуктов | Siemens SIRIUS 3RT1 Series (Снято с производства, Запасная модель: 3RT2024-1BB40) |
| Structural Specification | 3-столб, Size S0, Screw Termination, IP20 Protection Class |
| Напряжение катушки | 24 В постоянного тока (24 Volt DC) |
| Конфигурация основного контакта | 3 Нормально открытый (3НЕТ) |
| Application Category | АС-3 (Three-Phase Motor Load) 12А, 5.5kW/400V |
- Core Parameters of Thermal Current (Это)
- Thermal Current of Main Contacts
| Current Type | Rated Value | Применимые условия | Примечания |
| АС-1 (резистивная нагрузка) Тепловой ток | 40А | 690В и, 50/60Гц | Maximum allowable current for long-term operation |
| АС-3 (Нагрузка двигателя) Номинальный ток | 12А | 400В и, 50/60Гц | Corresponding to 5.5kW three-phase motor |
| DC-1 (DC Resistive Load) Тепловой ток | 12А | 24В Вашингтоне | Long-term operating current for DC circuits |
| DC-3 (DC Motor Load) Номинальный ток | 8А | 24В Вашингтоне | Starting and operating current for DC motors |
- Thermal Current of DC24V Coil
| Параметр | Ценить | Calculation Basis |
| Rated Coil Power | 5.9Вт | Siemens official data |
| Coil Thermal Current | 0.246А | I = P/U = 5.9W/24V |
| Coil Resistance | Приблизительно. 97.5 | R = U/I = 24V/0.246A |
| Coil Pick-Up/Holding Power | 5.9W for both | DC coil has the same pick-up and holding power |
III. Key Technical Characteristics
- Load Adaptation: Suitable for controlling ≤12A resistive load or ≤8A DC motor load in DC24V circuits
- Рабочая температура: -25°С ~ 60°С, adaptable to industrial environments
- Механическая жизнь: 3×10⁷ operations, Электрическая жизнь (АС-3): 1×10⁶ operations
- Напряжение изоляции: 690В, reliable electrical isolation performance
- Replacement Models and Compatibility
Preferred Replacement Model: 3RT2024-1BB40 (Siemens SIRIUS 3RT2 Series)
Identical main contact and coil parameters, with an additional 1NO+1NC auxiliary contact
Compatible mounting dimensions for direct replacement
Other Compatible Models:
Шнайдер: LC1D12BD (24 В постоянного тока, 12А, 3НЕТ)
АББ: A12-30-0124VDC (12А, 3НЕТ, 24 В постоянного тока)
- Примечания по использованию
- DC Circuit Application: When controlling DC24V circuits, derate the main contacts for use (≤12A resistive load) and install a surge suppressor (freewheeling diode) to protect the contacts
- Heat Management: Ensure adequate ventilation for the контактор, avoid enclosed installation, and further derate the load when the ambient temperature exceeds 40°C (10% derating for every 10°C rise)
- Защита катушки: For the DC24V coil, pay attention to power supply fluctuations (allowable range: 21.6V~26.4V DC) to avoid burnout due to overvoltage
- Способ монтажа: Поддерживает монтаж на стандартной DIN-рейке 35 мм или на панели., with no restriction on mounting direction
Краткое содержание
For Siemens 3RT1024-1BB40 in DC24V circuits, the thermal current of the main contacts is 12A (резистивная нагрузка) and the thermal current of the DC24V coil is approximately 0.246A. Данная модель снята с производства, and it is recommended to use the replacement model 3RT2024-1BB40 as the first choice, which features better performance and an added auxiliary contact function.
Siemens 3RT1024-1BB40 Selection Quick Reference Table (DC24V/Thermal Current Special)
Применимые сценарии: Procurement Verification / On-Site Installation / Model Replacement / Parameter Review
| Модуль | Элемент | Rated Parameter/Core Information | Remarks/Applicable Conditions |
| Основная информация | Модель продукта | 3RT1024-1BB40 | Siemens SIRIUS 3RT1 Series (Снято с производства) |
| Напряжение катушки | 24 В постоянного тока (Постоянный ток) | Consistent pick-up/holding power | |
| Конфигурация контактов | 3-pole main contacts (3НЕТ), no auxiliary contacts | защита IP20, screw termination | |
| Structural Specification | Size S0, 35мм стандартный монтаж на DIN-рейку | No mounting direction restriction, panel/rail mountable | |
| Main Contact Current Parameters | АС-1 (резистивная нагрузка) Тепловой ток | 40A@690V AC/50/60Hz | Maximum allowable current for AC long-term operation |
| АС-3 (Нагрузка двигателя) Номинальный ток | 12A@400V AC/50/60Hz (5.5kW three-phase motor) | Rated for AC motor starting/operation | |
| DC-1 (резистивная нагрузка) Тепловой ток | 12A@24V DC | Core parameter for DC24V long-term operation (Key Point) | |
| DC-3 (Нагрузка двигателя) Номинальный ток | 8A@24V DC | Adapted for DC24V motor load | |
| DC24V Coil Parameters | Номинальная мощность | 5.9Вт | Siemens official rating |
| Coil Thermal Current | 0.246А | Calculation formula: I=P/U=5.9W/24V | |
| Coil Resistance | Приблизительно. 97.5Ой | Calculation formula: R=U/I=24V/0.246A | |
| Allowable Voltage Range | 21.6V~26.4V DC (±10%) | Avoid coil burnout from over/undervoltage | |
| Life/Insulation | Механическая жизнь | 3×10⁷ operations | Industrial-grade durability |
| AC-3 Electrical Life | 1×10⁶ operations | Adapted for frequent motor start/stop | |
| Напряжение изоляции | 690В переменного/постоянного тока | Reliable electrical isolation performance | |
| Preferred Replacement Model | Модель | 3RT2024-1BB40 (Серия Сименс 3RT2) | Original factory upgraded model, direct compatible replacement |
| Core Compatibility Points | Same main contact/coil/mounting dimensions as 3RT1024-1BB40 | No rewiring cost, прямая замена | |
| Upgrade Points | Added 1NO+1NC auxiliary contacts, improved protection/durability | First choice for cost performance | |
| Cross-Brand Compatible Models | Шнайдер | LC1D12BD | 24 В постоянного тока, 3НЕТ главных контактов, 12A@400V AC-3 |
| АББ | A12-30-01*24VDC | 24 В постоянного тока, 3НЕТ главных контактов, 12A@400V AC-3 | |
| Installation/Usage Key Points | Требования к установке | 35мм стандартная DIN-рейка, ventilated installation, avoid enclosure | Reduce temperature rise, ensure heat dissipation |
| DC Protection | Install a freewheeling diode on main contacts when controlling DC24V circuits | Suppress surges, prevent contact erosion | |
| Temperature Derating | 10% load current derating for every 10°C rise when ambient temperature >40℃ | например, DC24V resistive load ≤10.8A at 50℃ | |
| Рабочая температура | -25℃ ~ 60℃ | Adapted for industrial high/low temperature environments |
Key Highlighted Points: DC24V resistive load thermal current 12A, coil thermal current 0.246A, preferred replacement model 3RT2024-1BB40
Контактор,автоматический выключатель,солнечный инвертор,электрический счетчик,солнечные батареи

















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