Siemens
Siemens Thermal Delayed Overload Relay for Single Unit Installation
Siemens Thermal Delayed Overload Relay, 8-12.5A, 1NO+1NC
● In Stock
12-Mo Warranty
Same-Day Dispatch
Ships Worldwide
🎖 Veteran-Owned
In Stock — Ready to Ship
Get a price for 3UA5900-1K
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
Thermal overload protection
Adjustable setting range
Single unit installation
1 NO + 1 NC contacts
Reliable motor protection
Product description
The Siemens 3UA5900-1K is a thermal delayed overload relay designed for installation as a single unit. It features an adjustable setting range of 8 to 12.5 Amperes and includes one normally open (NO) and one normally closed (NC) contact.
This overload relay is crucial for protecting electric motors and other electrical equipment against overcurrents caused by overloads or short circuits. It is commonly used in motor control circuits and industrial machinery where reliable motor protection is essential.
Stanlo Automation, a veteran-owned supplier, provides the Siemens 3UA5900-1K and a vast selection of surplus industrial automation parts. Trust us for your component needs.
Technical specifications
| Type | Thermal Delayed Overload Relay |
| Installation | Single Unit |
| Setting Range | 8 to 12.5A |
| Contacts | 1 NO + 1 NC |
Common applications
Motor control circuits
Industrial machinery
Pump systems
Conveyor systems
HVAC equipment
Compatible systems
Used in conjunction with contactors for motor starting applications.
Also known as
Siemens 3UA5900-1K relay
Thermal overload protector
Motor starter relay
Replaces / compatible with
This overload relay is designed for direct installation and can be used to protect motors where the specified current and contact configuration are required.
Technical note
Expert tip
Properly set the overload relay to match the motor's full load current to ensure effective protection without nuisance tripping.What happens next?
1
Email confirmation
Immediate receipt acknowledgment sent to you
2
Account manager assigned
Confirms your part's spec and condition
3
Your quote delivered
Tailored to your specific requirements
Frequently asked questions
What is the adjustable current setting range for the Siemens 3UA5900-1K?
The Siemens 3UA5900-1K thermal delayed overload relay has an adjustable setting range for overcurrent protection from 8 to 12.5 Amperes.