Contator DC Siemens 3RT1024-1BB40

Model Interpretation and Basic Information

Item	Detalhes
Modelo Completo	3RT1024-1BB40
Série de produtos	Siemens SIRIUS 3RT1 Series (Descontinuado, Modelo de substituição: 3RT2024-1BB40)
Structural Specification	3-pólo, Size S0, Screw Termination, IP20 Protection Class
Tensão da bobina	CC24V (24 Volt DC)
Configuração do contato principal	3 Normalmente aberto (3NÃO)
Categoria de aplicativo	AC-3 (Three-Phase Motor Load) 12UM, 5.5kW/400V

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

Current Type	Valor avaliado	Condições Aplicáveis	Observações
AC-1 (Carga resistiva) Corrente Térmica	40UM	690V e, 50/60Hz	Maximum allowable current for long-term operation
AC-3 (Carga do motor) Corrente nominal	12UM	400V e, 50/60Hz	Corresponding to 5.5kW three-phase motor
DC-1 (DC Resistive Load) Corrente Térmica	12UM	24Em DC	Long-term operating current for DC circuits
DC-3 (DC Motor Load) Corrente nominal	8UM	24Em DC	Starting and operating current for DC motors

Thermal Current of DC24V Coil

Parâmetro	Valor	Calculation Basis
Potência nominal da bobina	5.9C	Siemens official data
Coil Thermal Current	0.246UM	I = P/U = 5.9W/24V
Resistência da bobina	Aprox.. 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. Principais características técnicas

Load Adaptation: Suitable for controlling ≤12A resistive load or ≤8A DC motor load in DC24V circuits
Temperatura operacional: -25°C ~ 60 °C, adaptable to industrial environments
Vida Mecânica: 3operações ×10⁷, Vida Elétrica (AC-3): 1×10⁶ operações
Tensão de Isolamento: 690V, reliable electrical isolation performance
Modelos de substituição e compatibilidade

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:

Schneider: LC1D12BD (CC24V, 12UM, 3NÃO)

ABB: A12-30-0124VDC (12UM, 3NÃO, CC24V)

Notas de uso
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 contator, avoid enclosed installation, and further derate the load when the ambient temperature exceeds 40°C (10% derating for every 10°C rise)
Proteção de bobina: For the DC24V coil, pay attention to power supply fluctuations (faixa permitida: 21.6V~26.4V DC) to avoid burnout due to overvoltage
Método de montagem: Suporta montagem em trilho DIN padrão de 35 mm ou montagem em painel, with no restriction on mounting direction

Resumo

For Siemens 3RT1024-1BB40 in DC24V circuits, the thermal current of the main contacts is 12A (carga resistiva) and the thermal current of the DC24V coil is approximately 0.246A. Este modelo foi descontinuado, 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)

Cenários Aplicáveis: Procurement Verification / On-Site Installation / Substituição de modelo / Parameter Review

Módulo	Item	Rated Parameter/Core Information	Remarks/Applicable Conditions
Informações Básicas	Modelo de Produto	3RT1024-1BB40	Siemens SIRIUS 3RT1 Series (Descontinuado)
	Tensão da bobina	CC24V (Direct Current)	Consistent pick-up/holding power
	Configuração de contato	3-contatos principais do pólo (3NÃO), sem contatos auxiliares	Proteção IP20, screw termination
	Structural Specification	Size S0, 35mm montagem em trilho DIN padrão	No mounting direction restriction, panel/rail mountable
Main Contact Current Parameters	AC-1 (Carga resistiva) Corrente Térmica	40A@690V AC/50/60Hz	Maximum allowable current for AC long-term operation
	AC-3 (Carga do motor) Corrente nominal	12A@400V AC/50/60Hz (5.5kW three-phase motor)	Rated for AC motor starting/operation
	DC-1 (Carga resistiva) Corrente Térmica	12A@24V DC	Core parameter for DC24V long-term operation (Key Point)
	DC-3 (Carga do motor) Corrente nominal	8A@24V DC	Adapted for DC24V motor load
DC24V Coil Parameters	Potência nominal	5.9C	Siemens official rating
	Coil Thermal Current	0.246UM	Calculation formula: I=P/U=5.9W/24V
	Resistência da bobina	Aprox.. 97.5Oh	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	Vida Mecânica	3operações ×10⁷	Durabilidade de nível industrial
	AC-3 Electrical Life	1×10⁶ operações	Adapted for frequent motor start/stop
	Tensão de Isolamento	690V CA/CC	Reliable electrical isolation performance
Preferred Replacement Model	Modelo	3RT2024-1BB40 (Série 3RT2 da Siemens)	Original factory upgraded model, direct compatible replacement
	Core Compatibility Points	Same main contact/coil/mounting dimensions as 3RT1024-1BB40	No rewiring cost, substituição direta
	Upgrade Points	Added 1NO+1NC auxiliary contacts, improved protection/durability	First choice for cost performance
Cross-Brand Compatible Models	Schneider	LC1D12BD	CC24V, 3SEM contatos principais, 12A@400V AC-3
	ABB	A12-30-01*24VDC	CC24V, 3SEM contatos principais, 12A@400V AC-3
Installation/Usage Key Points	Requisitos de instalação	35trilho DIN padrão mm, 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℃	por exemplo, DC24V resistive load ≤10.8A at 50℃
	Temperatura operacional	-25℃ ~ 60 ℃	Adapted for industrial high/low temperature environments