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The Siemens 3RK1911-2BM21 provides a complete connector solution for motor cables. You can use this set with SIMATIC ET 200pro motor starters. It connects the starter output to the motor cable reliably. This accessory suits distributed motor control applications.
Technical Specifications and Physical Construction
This connector set measures 85 mm in height. Its width reaches 35 mm, and the depth equals 42 mm. The Siemens 3RK1911-2BM21 weighs approximately 0.08 kilograms. The set contains one male connector and one female connector. It includes four crimp contacts for phase conductors. A separate contact handles the protective earth connection. The connectors store no energy in capacitors or batteries. Each connector housing uses reinforced polyamide material.
| Parameter | Specification |
|---|---|
| Model | Siemens 3RK1911-2BM21 |
| Category | Connector Set for Motor Cable |
| Dimensions (H x W x D) | 85 mm x 35 mm x 42 mm |
| Weight | 0.08 kg |
| Components | 2 connectors (male + female) |
| Contacts Included | 5 (4 phase + 1 PE) |
| Energy Storage | None |
| Housing Material | Reinforced polyamide |
| Protection Rating | IP67 |
| Temperature Range | -25°C to +85°C |
Electrical Ratings and Cable Compatibility
The Siemens 3RK1911-2BM21 handles currents up to 16 A continuously. It accepts voltage ratings of 600 V AC maximum. The crimp contacts accept cable sizes from 0.75 mm² to 2.5 mm². Consequently, this set works with standard industrial motor cables. The connectors provide strain relief for cables between 8 mm and 12 mm diameter. Gold-plated contacts ensure low contact resistance over time. The IP67 rating protects against dust and temporary water immersion.
Installation and Practical Usage Guidelines
You must crimp the contacts onto prepared cable ends first. Transitioning to assembly, push the contacts into the housing until they click. Tighten the cable gland to secure the wire against pulling forces. For disconnection, use a release tool to remove the contacts. Always match the pin numbering with the motor starter documentation. The operating temperature range spans from -25°C to +85°C reliably.