Siemens
Siemens 3UG4512-2BR20 Analog Phase Failure and Sequence Monitoring Relay
Siemens 3UG4512-2BR20 Analog Phase Failure and Sequence Relay
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12-Mo Warranty
Same-Day Dispatch
Ships Worldwide
🎖 Veteran-Owned
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Response within 1 business hour
12-month warranty
All units tested
Same-day dispatch
Order by 2pm CST
Worldwide delivery
US, EU, Asia, Middle East
Veteran-owned
CAGE: 9NK75
Phase failure detection
Phase sequence recognition
Spring-loaded connection system
Wide voltage range (160-690V AC)
Two changeover contacts
Product description
The Siemens 3UG4512-2BR20 is an analog monitoring relay designed for phase failure and sequence monitoring, featuring spring-loaded connection terminals. It operates across a wide voltage range of 3 x 160 to 690V AC and has two changeover contacts.
This relay is essential for protecting three-phase systems in applications where quick, tool-less connections are required. The spring terminals ensure secure and vibration-resistant connections, enhancing reliability in demanding industrial environments.
Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3UG4512-2BR20. We provide quality industrial automation components and dependable service.
Technical specifications
| Type | Analog Monitoring Relay |
| Function | Phase Failure & Sequence Monitoring |
| Voltage | 3 x 160-690 V AC |
| Frequency | 50/60 Hz |
| Contacts | 2 Changeover (DPDT) |
| Terminals | Spring-Loaded |
Common applications
Industrial automation
Motor control
Machine safety
Control panels
Systems requiring tool-less wiring
Mobile equipment
Compatible systems
Three-phase power systems
Also known as
Siemens 3UG4512 Phase Relay
Analog Phase Monitor 3UG4512-2BR20
Siemens Spring Terminal Phase Relay
Replaces / compatible with
This is a product phase-out. The preferred successor is 3UG5512-2BR20.
Technical note
Expert tip
The spring-loaded terminals offer a reliable and efficient connection method, especially in applications with vibration or where quick installation is essential.What happens next?
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Frequently asked questions
What are the benefits of the spring-loaded terminals on the Siemens 3UG4512-2BR20?
The spring-loaded terminals on the Siemens 3UG4512-2BR20 allow for fast, tool-less connections that are secure and vibration-resistant. This is particularly advantageous in industrial settings where frequent maintenance or vibration is a concern.