접촉기,회로 차단기,태양광 인버터,전기 계량기,태양 전지
- Model Interpretation and Basic Information
| Item | Details |
| Complete Model | 3RT1024-1BB40 |
| Product Series | Siemens SIRIUS 3RT1 Series (Discontinued, Replacement Model: 3RT2024-1BB40) |
| Structural Specification | 3-pole, Size S0, Screw Termination, IP20 Protection Class |
| 코일 전압 | DC24V (24 Volt DC) |
| Main Contact Configuration | 3 Normally Open (3아니요) |
| Application Category | AC-3 (Three-Phase Motor Load) 12에이, 5.5kW/400V |
- Core Parameters of Thermal Current (Ith)
- Thermal Current of Main Contacts
| Current Type | Rated Value | Applicable Conditions | Remarks |
| AC-1 (Resistive Load) Thermal Current | 40에이 | 690뷔와, 50/60헤르츠 | Maximum allowable current for long-term operation |
| AC-3 (모터 부하) 정격전류 | 12에이 | 400뷔와, 50/60헤르츠 | Corresponding to 5.5kW three-phase motor |
| DC-1 (DC Resistive Load) Thermal Current | 12에이 | 24V DC | Long-term operating current for DC circuits |
| DC-3 (DC Motor Load) 정격전류 | 8에이 | 24V DC | Starting and operating current for DC motors |
- Thermal Current of DC24V Coil
| Parameter | 값 | Calculation Basis |
| Rated Coil Power | 5.9여 | Siemens official data |
| Coil Thermal Current | 0.246에이 | I = P/U = 5.9W/24V |
| Coil Resistance | Approx. 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
- Operating Temperature: -25°C ~ 60°C, adaptable to industrial environments
- 기계적 수명: 3×10⁷ operations, 전기적 수명 (AC-3): 1×10⁶ operations
- Insulation Voltage: 690다섯, 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:
슈나이더: LC1D12BD (DC24V, 12에이, 3아니요)
씨줄: A12-30-0124VDC (12에이, 3아니요, DC24V)
- 사용법 참고 사항
- 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 접촉기, avoid enclosed installation, and further derate the load when the ambient temperature exceeds 40°C (10% derating for every 10°C rise)
- Coil Protection: For the DC24V coil, pay attention to power supply fluctuations (allowable range: 21.6V~26.4V DC) to avoid burnout due to overvoltage
- Mounting Method: Supports 35mm standard DIN rail mounting or panel mounting, with no restriction on mounting direction
요약
For Siemens 3RT1024-1BB40 in DC24V circuits, the thermal current of the main contacts is 12A (resistive load) and the thermal current of the DC24V coil is approximately 0.246A. This model has been discontinued, 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)
적용 가능한 시나리오: Procurement Verification / On-Site Installation / Model Replacement / Parameter Review
| Module | Item | Rated Parameter/Core Information | Remarks/Applicable Conditions |
| Basic Information | Product Model | 3RT1024-1BB40 | Siemens SIRIUS 3RT1 Series (Discontinued) |
| 코일 전압 | DC24V (Direct Current) | Consistent pick-up/holding power | |
| Contact Configuration | 3-pole main contacts (3아니요), no auxiliary contacts | IP20 protection, screw termination | |
| Structural Specification | Size S0, 35mm standard DIN rail mounting | No mounting direction restriction, panel/rail mountable | |
| Main Contact Current Parameters | AC-1 (Resistive Load) Thermal Current | 40A@690V AC/50/60Hz | Maximum allowable current for AC long-term operation |
| AC-3 (모터 부하) 정격전류 | 12A@400V AC/50/60Hz (5.5kW three-phase motor) | Rated for AC motor starting/operation | |
| DC-1 (Resistive Load) Thermal Current | 12A@24V DC | Core parameter for DC24V long-term operation (Key Point) | |
| DC-3 (모터 부하) 정격전류 | 8A@24V DC | Adapted for DC24V motor load | |
| DC24V Coil Parameters | Rated Power | 5.9여 | Siemens official rating |
| Coil Thermal Current | 0.246에이 | Calculation formula: I=P/U=5.9W/24V | |
| Coil Resistance | Approx. 97.5Ω | 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 | 기계적 수명 | 3×10⁷ operations | Industrial-grade durability |
| AC-3 Electrical Life | 1×10⁶ operations | Adapted for frequent motor start/stop | |
| Insulation Voltage | 690V AC/DC | Reliable electrical isolation performance | |
| Preferred Replacement Model | 모델 | 3RT2024-1BB40 (Siemens 3RT2 Series) | Original factory upgraded model, direct compatible replacement |
| Core Compatibility Points | Same main contact/coil/mounting dimensions as 3RT1024-1BB40 | No rewiring cost, direct replacement | |
| Upgrade Points | Added 1NO+1NC auxiliary contacts, improved protection/durability | First choice for cost performance | |
| Cross-Brand Compatible Models | 슈나이더 | LC1D12BD | DC24V, 3NO main contacts, 12A@400V AC-3 |
| 씨줄 | A12-30-01*24VDC | DC24V, 3NO main contacts, 12A@400V AC-3 | |
| Installation/Usage Key Points | 설치 요구 사항 | 35mm standard DIN rail, 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℃ | 예를 들어, DC24V resistive load ≤10.8A at 50℃ | |
| Operating Temperature | -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
