The Siemens 3RU2126-1KB0 is a genuine SIRIUS 3RU2 Thermal Overload Relay designed for reliable motor overload and phase-failure protection. It has an adjustable current range of 9.0–12.5 A, Class 10 tripping characteristic, and Size S0 construction. The relay is designed for contactor mounting and uses screw terminals for the main and auxiliary circuits. It also provides manual and automatic reset, making it suitable for flexible motor control applications.
This Siemens overload relay is suitable for protecting motors in industrial control panels, MCC panels, pumps, compressors, conveyors, HVAC systems, machinery, and manufacturing equipment. Its thermal protection helps prevent motor damage caused by excessive load and phase-failure conditions.
At SB Smart, Faridabad, we supply genuine Siemens SIRIUS products with GST invoice, technical support, bulk order assistance, and fast delivery across India.
The adjustable current range is 9.0 to 12.5 A.
This model uses a Class 10 thermal tripping characteristic.
The 3RU2126-1KB0 is Size S0 and is designed for combination with compatible S0 contactors.
Yes, the product specification includes Manual-Automatic Reset.
The Siemens 3RU2126-1KB0 is available from SB Smart, Faridabad, with GST billing, bulk-order support, and delivery across India.
| Specification | Details |
|---|---|
| Product Name | Thermal Overload Relay |
| Part Number | 3RU2126-1KB0 |
| SKU | 3RU2126-1KB0 |
| Brand | Siemens |
| Product Family | SIRIUS 3RU2 |
| Product Type | Motor Protection Relay |
| Variant | KB0 |
| Current Setting Range | 5.5–8 A |
| Relay Size | S0 |
| Trip Class | Class 10 |
| Operating Principle | Thermal |
| Mounting Type | Direct Contactor Mounting |
| Main Circuit Connection | Screw Terminal |
| Auxiliary Contacts | 1 NO + 1 NC |
| Reset Type | Manual / Automatic |
| Rated Operational Voltage | Up to 690 V AC |
| Operating Frequency | 50/60 Hz |
| Number of Main Poles | 3 |
| Protection Features | Overload, Phase Failure & Phase Asymmetry Protection |
| Application | Industrial Motor Protection |
| Manufacturer | Siemens |
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