3TH4271-0BF4

Siemens SIRIUS 3TH4271-0BF4 Control Relay (110V DC Coil, 7NO+1NC)
Siemens SIRIUS 3TH4271-0BF4 Control Relay (110V DC Coil, 7NO+1NC)

The Siemens SIRIUS 3TH4271-0BF4 control relay features an 8-pole design with 7 NO + 1 NC contacts, a 110V DC coil power supply, and can be mounted on a 35mm standard DIN rail. It is suitable for signal amplification and expansion applications in DC control circuits.

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Siemens SIRIUS 3TH4271-0BF4 Control Relay (110V DC Coil, 7NO+1NC)
Product Positioning

The 3TH4271-0BF4 is an 8-pole control relay from the Siemens SIRIUS 3TH4 series. It uses a combination of 7 normally open and 1 normally closed contacts and is driven by a 110V DC coil. It is commonly used for contact expansion in DC control systems.

Core Product Advantages and Features
8 Maximum Number of Contacts Configuration
It provides 7 sets of normally open and 1 set of normally closed contacts, allowing multiple control circuits to be switched with a single operation, reducing the number of wiring and relays required.
110V DC coil design
It adopts 110V DC coil drive and is suitable for direct integration with existing DC circuits such as PLC output and DC control panel.
Standard rail installation
It can be directly snapped onto a 35mm DIN rail, and also supports screw fixing, making installation and replacement convenient and quick.
Conforms to international standards
The product design complies with the relevant specifications of EN 50011 and IEC 60947-5-1 and can be applied to general industrial control applications.
project Specification
model 3TH4271-0BF4
Product Type SIRIUS control relays (contactor type)
Contact configuration 7 NO + 1 NC (8 poles)
coil voltage 110 V DC
Terminal type Screw terminals
Installation method 35mm DIN rail / screw fixing
Applicable Standards EN 50011 / IEC 60947-5-1
External dimensions 78 x 45 x 102 mm (height x width x depth)
Ambient temperature -25°C ~ +55°C

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