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3RU6126-4BB0

The Siemens 3RU6126-4BB0 is a SIRIUS 3RU thermal overload relay designed for motor protection in industrial and commercial applications. It ensures reliable operation by guarding against overloads, phase failures, and motor stalling, helping prevent equipment damage and downtime.

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TEL：400-887-3214
Mail：jilineasyyi@outlook.com
Q Q：615739355
Parameters
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Siemens 3RU6126-4BB0 Technical Parameters
Electrical Characteristics
Parameter Value
Rated Operational Current (Iₑ) 0.25-0.4 A (adjustable)
Setting Range Continuously adjustable within range
Tripping Class 10A (standard), Class 20 optional
Rated Insulation Voltage (Uᵢ) 690 V AC
Utilization Category AC-3 (squirrel cage motors)
Rated Thermal Current (Iᵣₜₕ) 0.4 A
Auxiliary Contact Rating 1 NO (5A, 250V AC) + 1 NC (5A, 250V AC)
Mechanical Specifications
Parameter Value
Mounting Type Snap-on to 3RT/3TF contactors
Connection Type Screw terminals
Mechanical Life 100,000 operations
Electrical Life 10,000 operations at Iₑ
Degree of Protection IP20 (installed in enclosure)
Environmental Data
Parameter Value
Ambient Temperature -20°C to +60°C
Storage Temperature -40°C to +70°C
Relative Humidity ≤95% (non-condensing)
Altitude ≤2000m above sea level
Protection Features
Overload protection (bi-metallic trip)

Phase failure sensitivity

Ambient temperature compensation

Trip indication (mechanical flag)

Standards Compliance
IEC/EN 60947-4-1

UL 508

CSA C22.2 No. 14

CE

RoHS

Dimensions & Weight
Width: 45 mm

Height: 78 mm

Depth: 73 mm

Weight: Approx. 0.25 kg