Description
The Siemens 3UB81234EW2 is a heavy-duty, three-phase overload relay engineered to deliver precise and dependable motor protection across a wide range of industrial and commercial HVAC applications. Designed for use with Siemens motor starters and contactors, this relay guards motors against damaging overload conditions, phase loss, and phase imbalance, helping extend equipment life and reduce costly downtime.
Key Features
- Wide current adjustment range of 10–40A to accommodate a variety of three-phase motor loads
- Selectable manual or automatic reset modes for flexible system integration
- Three-phase overload protection with phase-loss sensitivity
- Designed for direct mounting to compatible Siemens contactors and motor starters
- Bimetallic thermal overload relay design for proven, reliable trip performance
- Auxiliary contacts for control circuit signaling and remote indication
- Compact, rugged construction suited for panel and enclosure mounting
Product Specifications
- SKU: 3UB81234EW2
- Brand: Siemens
- Current Range: 10–40A
- Phase: 3-Phase
- Reset Mode: Manual / Automatic (selectable)
- Series: 3UB8
- Application: Motor overload protection
Applications
- Commercial HVAC motor starters and control panels
- Chiller, air handler, and pump motor protection
- Industrial motor control centers (MCCs)
- Fan and blower motor circuits requiring overload protection
Why Choose Siemens Overload Relays?
Siemens 3UB8 series overload relays are built to meet the demanding requirements of modern motor control applications. Their wide current adjustment range and selectable reset functionality make them a versatile solution for HVAC professionals and electrical contractors who need reliable, code-compliant motor protection. Trust Siemens engineering to keep your motors running safely and efficiently.
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