Siemens
Siemens 3TH2271-0BB4 Contactor Relay - 71E, 7 NO + 1 NC, DC
Siemens 3TH2271-0BB4 Contactor Relay with 7 NO + 1 NC contacts.
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7 Normally Open (NO) Contacts
1 Normally Closed (NC) Contact
24V DC Operation
45mm Width
EN 50011 Standard
Product description
The Siemens 3TH2271-0BB4 is a contactor relay designed for DC control circuits, featuring 7 normally open (NO) and 1 normally closed (NC) contact. It operates with a 24V DC coil voltage and conforms to EN 50011 standards.
This relay is ideal for applications requiring a significant number of normally open contacts alongside a normally closed contact for complex control logic and interlocking in DC systems. Its 45mm width is suitable for space-conscious panel designs.
Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3TH2271-0BB4. We provide reliable automation components and efficient service to ensure your industrial needs are met.
Technical specifications
| Manufacturer | Siemens |
| Part Number | 3TH2271-0BB4 |
| Type | Contactor Relay |
| Contacts | 7 NO + 1 NC |
| Coil Voltage | 24V DC |
| Width | 45 mm |
| Standard | EN 50011 |
| Operation | DC |
Common applications
DC Control Circuits
Signaling
Automation Systems
Industrial Control Panels
Interlocking
Compatible systems
Designed for DC control systems and compatible with standard wiring practices.
Also known as
Siemens 3TH2271-0BB4 Contactor
Siemens 24V DC 7+1 Relay
71E DC Contactor Relay
Replaces / compatible with
This is a phased-out product. The successor is the Siemens SIRIUS 3RH21 series.
Technical note
Expert tip
This phased-out 45mm wide contactor relay is designed for 24V DC operation and provides a high number of NO contacts for complex control tasks.What happens next?
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Frequently asked questions
What is the primary function of the Siemens 3TH2271-0BB4 contactor relay?
The Siemens 3TH2271-0BB4 is a contactor relay used in DC control circuits for switching and signaling, featuring a configuration of 7 NO and 1 NC contacts.