Siemens 3TH4 Contactor Relay, 24V dc Coil, 10 A 24V dc, 9 NO/1 NC, 24V dc

RS Stock No.:: 203-3922
Mfr. Part No.:: 3TH4391-0BB4
Manufacturer:: Siemens

Siemens 3TH4 Contactor Relay, 24V dc Coil, 10 A 24V dc, 9 NO/1 NC, 24V dc

Subtotal (1 unit)*

€232.25

(exc. VAT)

€285.67

(inc. VAT)

In Stock

Plus 3 unit(s) shipping from 04 May 2026

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Units	Per unit
1 +	€232.25

*price indicative

RS Stock No.:: 203-3922
Mfr. Part No.:: 3TH4391-0BB4
Manufacturer:: Siemens

Specifications

Technical data sheets

Legislation and Compliance

Product Details

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	Siemens
	Coil Voltage	24V dc
	Product Type	Contactor Relay
	Contact Voltage	24V dc
	Contact Current	10A
	Series	3TH4
	Mount Type	DIN Rail
	Normal State Configuration	9 NO/1 NC
	Number of Auxiliary Contacts	10
	Terminal Type	Screw
	Minimum Operating Temperature	-25°C
	Control Circuit Voltage Uc	24V dc
	Operational Current Ie	10A
	Maximum Operating Temperature	55°C
	Standards/Approvals	No
	Width	55mm
	Length	78mm
	Depth	135mm
	Pole and Throw Configuration	10

	Select all
	Brand Siemens
	Coil Voltage 24V dc
	Product Type Contactor Relay
	Contact Voltage 24V dc
	Contact Current 10A
	Series 3TH4
	Mount Type DIN Rail
	Normal State Configuration 9 NO/1 NC
	Number of Auxiliary Contacts 10
	Terminal Type Screw
	Minimum Operating Temperature -25°C
	Control Circuit Voltage Uc 24V dc
	Operational Current Ie 10A
	Maximum Operating Temperature 55°C
	Standards/Approvals No
	Width 55mm
	Length 78mm
	Depth 135mm
	Pole and Throw Configuration 10

Siemens 3TH4 Series Contactor Relay, 24V DC Coil Voltage, 10A Contact Current Rating - 3TH4391-0BB4

This contactor relay is an essential electrical control device that operates at a coil voltage of 24V DC. Designed for robust performance in industrial settings, this unit measures 78mm in length, 55mm in width, and 135mm in depth, making it compatible with standard DIN rail installations. With a maximum operating temperature of +55°C and a minimum of -25°C, it ensures reliability across various environments.

Features & Benefits

• Designed for DC operation, enhancing system efficiency

• Utilises screw terminal connections for secure electrical contact

• Fastening method allows easy snap-on mounting on DIN rail

• High operational safety with an extended service life

Applications

• Utilised in automation systems for controlling electrical circuits

• Effective in machinery and equipment for reliable operation

• Suitable for requiring precise switching functions

• Effective in systems demanding high-temperature resilience

What is the significance of having a combination of 9NO and 1NC contacts?

The combination offers greater flexibility for controlling multiple circuits, allowing for diverse configurations and improved functionality in automation systems.

How does the rated load current of 10A benefit operational efficiency?

The 10A rating ensures that the relay can manage significant electrical loads without performance degradation, thus supporting the reliability of electrical control devices.

What factors contribute to the durability of this unit?

Its design allows for operation across a broad temperature range and the inclusion of high-quality materials ensures a longer service life under typical industrial conditions.