シーメンス DC コンタクタ 3RT1024-1BB40

Model Interpretation and Basic Information

アイテム	詳細
完成モデル	3RT1024-1BB40
製品シリーズ	Siemens SIRIUS 3RT1 Series (製造中止, 代替機種: 3RT2024-1BB40)
Structural Specification	3-ポール, Size S0, Screw Termination, IP20 Protection Class
コイル電圧	DC24V (24 Volt DC)
主な接点構成	3 通常開 (3いいえ)
アプリケーションカテゴリー	AC-3 (Three-Phase Motor Load) 12あ, 5.5kW/400V

Core Parameters of Thermal Current (Ith)
Thermal Current of Main Contacts

Current Type	定格値	Applicable Conditions	備考
AC-1 (Resistive Load) Thermal Current	40あ	690Vと, 50/60Hz	Maximum allowable current for long-term operation
AC-3 (Motor Load) 定格電流	12あ	400Vと, 50/60Hz	Corresponding to 5.5kW three-phase motor
DC-1 (DC Resistive Load) Thermal Current	12あ	24ワシントンDCで	Long-term operating current for DC circuits
DC-3 (DC Motor Load) 定格電流	8あ	24ワシントンDCで	Starting and operating current for DC motors

Thermal Current of DC24V Coil

パラメータ	価値	Calculation Basis
Rated Coil Power	5.9W	Siemens official data
Coil Thermal Current	0.246あ	I = P/U = 5.9W/24V
コイル抵抗	約. 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
動作温度: -25°C ~ 60°C, adaptable to industrial environments
機械的寿命: 3×10⁷の操作, 電気的寿命 (AC-3): 1×10⁶演算
絶縁電圧: 690V, 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:

シュナイダー: LC1D12BD (DC24V, 12あ, 3いいえ)

ABB: A12-30-0124VDC (12あ, 3いいえ, DC24V)

使用上の注意
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 接触器, 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
取付方法: Supports 35mm standard DIN rail mounting or panel mounting, with no restriction on mounting direction

まとめ

For Siemens 3RT1024-1BB40 in DC24V circuits, the thermal current of the main contacts is 12A (抵抗負荷) 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)

該当するシナリオ: Procurement Verification / On-Site Installation / Model Replacement / Parameter Review

Module	アイテム	Rated Parameter/Core Information	Remarks/Applicable Conditions
基本情報	製品型式	3RT1024-1BB40	Siemens SIRIUS 3RT1 Series (製造中止)
	コイル電圧	DC24V (直流)	Consistent pick-up/holding power
	接点構成	3-極主接点 (3いいえ), no auxiliary contacts	IP20保護, screw termination
	Structural Specification	Size S0, 35mm標準DINレール取付	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 (Motor Load) 定格電流	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 (Motor Load) 定格電流	8A@24V DC	Adapted for DC24V motor load
DC24V Coil Parameters	定格電力	5.9W	Siemens official rating
	Coil Thermal Current	0.246あ	Calculation formula: I=P/U=5.9W/24V
	コイル抵抗	約. 97.5おお	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	機械的寿命	3×10⁷の操作	Industrial-grade durability
	AC-3 Electrical Life	1×10⁶演算	Adapted for frequent motor start/stop
	絶縁電圧	690AC/DCV	Reliable electrical isolation performance
Preferred Replacement Model	モデル	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, 直接交換
	Upgrade Points	Added 1NO+1NC auxiliary contacts, improved protection/durability	First choice for cost performance
Cross-Brand Compatible Models	シュナイダー	LC1D12BD	DC24V, 3NO main contacts, 12A@400V AC-3
	ABB	A12-30-01*24VDC	DC24V, 3NO main contacts, 12A@400V AC-3
Installation/Usage Key Points	インストール要件	35mm標準DINレール, 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℃	例えば, DC24V resistive load ≤10.8A at 50℃
	動作温度	-25℃ ~ 60℃	Adapted for industrial high/low temperature environments