Description
The ABB RXIIK4 (1MRK 001643-AA) is a high-reliability, heavy-duty auxiliary relay designed for demanding industrial and substation automation applications. As part of the ABB COMBIFLEX system, this relay is engineered for long-term operational stability in power protection schemes. It is typically utilized for signal multiplication, contact reinforcement, or as a trip relay where high-integrity switching is required to ensure the correct operation of circuit breakers and other protective devices.
Technical Specifications
| Specification | Details |
| Brand | ABB |
| Model | RXIIK4 / 1MRK 001643-AA |
| Serial/Batch | K0618059 |
| Frequency | 50/60 Hz |
| Function | Auxiliary / Intermediate Relay |
| Mounting | COMBIFLEX modular system |
| Contact Type | High-capacity industrial contacts |
| Product Color | Industrial Gray / ABB Standard |
Product Features
- ⚡ High Reliability: Built with robust electro-mechanical components to ensure consistent switching performance over millions of cycles.
- 🛡️ Substation Grade: Specifically designed to withstand the harsh electromagnetic environments found in electrical substations and power plants.
- 🔄 Modular Design: Part of the flexible COMBIFLEX ecosystem, allowing for quick, standardized integration into control panels and relay racks.
- 🌐 Voltage Tolerance: Engineered for stable operation across standard 50/60 Hz frequency power supplies.
- 🛠️ Minimal Maintenance: Designed for “fit and forget” reliability, reducing the need for frequent site inspections.

Recommended Similar Models (ABB COMBIFLEX Series)
- RXIIK2 (Compact version)
- RXME 18 (Auxiliary relay)
- RXME 24 (Auxiliary relay)
- RXMVE 1 (Voltage relay)
- RXMS 1 (Current relay)
- RXMM 1 (Auxiliary relay)
- RXMD 1 (Trip relay)
- RXMVB 2 (High-speed relay)
- RXMH 2 (High-speed relay)
- RXMB 1 (Auxiliary relay)
For detailed wiring diagrams, technical datasheets, or to check current availability for this ABB RXIIK4 Auxiliary Relay, please visit our industrial equipment portal.

