3RH1921-2JA11
The Siemens SIRIUS 3RH1921-2JA11 is a second-side-mounted auxiliary switch module with 2 poles, 1 NO + 1 NC contacts, and spring-loaded (cage clamp) terminals for quick wiring. It is suitable for expanding the 3RT1 series motor contactors of sizes S3 to S12.
Product Positioning
The 3RH1921-2JA11 belongs to the older side-mounted auxiliary switch module of SIRIUS 3RH19. It provides 1NO+1NC contacts and adopts spring-loaded terminal wiring. It is designed to be compatible with 3RT1 series motor contactors of sizes S3 to S12.
Core Product Advantages and Features
1NO+1NC contact design
It also provides one set each of normally open and normally closed contacts to meet basic interlocking and signal feedback requirements.
Spring-type cage clamp terminal
The screwless spring terminal design allows for fast wiring and prevents loosening even after long-term use.
Applicable to sizes S3 to S12
It corresponds to the medium and large-sized 3RT1 series motor contactors, covering a wide range of models.
Side-mounted assembly
It is installed on the contactor body by a side snap-fit method, without affecting the front wiring space.
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