Siemens 3RB1026-1RB0 Overload Relay
$51.00
The Siemens 3RB1026-1RB0 is a SIRIUS 3RB10 solid-state overload relay with a 0.1 to 0.4 A setting range, designed for direct mounting to 3RT102 contactors. Engineered with phase loss protection and a 4:1 setting ratio, the relay protects three-phase induction motors against overload and unbalanced current conditions in industrial control panels.
1 in stock
Description
- Wide Setting Ratio: Adjusts across a 4:1 current range.
- Phase Loss Protection: Detects unbalanced three-phase conditions.
- Conformal Coating: Resists aggressive and tropical atmospheres.
- Selectable Trip Class: Supports Class 10 or 20 operation.
- Integrated Controls: Includes STOP, test, and trip indicator.
Documentation
Technical Specifications
| Manufacturer | Siemens |
|---|---|
| Part Number | 3RB1026-1RB0 |
| Application | Motor Protection |
| Type | Overload Relay |
| Series | 3RB |
| Size / Rating | 12 Amp Max |
| Compatibility | 3RT Contactor |
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Description
The Siemens 3RB1026-1RB0 protects three-phase induction motors against overload and phase loss in industrial control panels, motor starters, and machinery feeders. As part of the SIRIUS 3R control generation, the relay targets motors with rated currents up to 100 A across the broader series, with this specific model tuned for low-current loads at 0.1 to 0.4 A. A wide 4:1 adjustment ratio consolidates motor coverage into fewer device variants, simplifying spares inventory and starter selection.
The relay attaches directly to 3RT102 contactors to form a compact starter, or installs separately via the 3RW19 mounting kit. Selectable Class 10 or 20 tripping with manual reset, 1 NO + 1 NC auxiliary contacts, trip indicator, STOP button, test function, and sealable cover are all standard. Conformal coating shields the PCB and electronics for aggressive and tropical atmospheres. Dimensions and terminations match the 3RU11 series, with tool-free rail mounting up to size S0.
Frequently Asked Questions
What is the current setting range of the Siemens 3RB1026-1RB0?
The 3RB1026-1RB0 has an adjustable current setting range of 0.1 to 0.4 A, with a 4:1 setting ratio for wide motor coverage.
Which contactors is the 3RB1026-1RB0 designed to mount on?
The relay mounts directly to Siemens 3RT102 contactors, or it can be installed separately using the 3RW19 separate-mounting kit.
Does the 3RB1026-1RB0 offer phase loss protection?
Yes, the solid-state design includes built-in phase loss protection, detecting unbalanced three-phase conditions to safeguard motor windings from damage.
