1 NO + 1 NC Auxiliary Switch
The 3RH1921-1DA11 provides one normally open and one normally closed instantaneous auxiliary contact for compatible Siemens contactors.
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SIEMENS
Siemens 3RH1921-1DA11 Contactor 1NO 1NC
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$18.50
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PRODUCT DOCUMENTATION
Product Information
Technical specifications, features, applications and purchasing information.
Technical Specifications
| Brand | Siemens |
| Model Number | 3RH1921-1DA11 |
| Product Category | Contactor |
| Product Type | Auxiliary Switch Block |
| Contact Configuration | 1 NO + 1 NC |
| Rated Operational Current (AC-12, 24 V) | 10 A |
| Rated Operational Current (AC-15, 230 V) | 6 A |
| Insulation Voltage | 500 V |
| Impulse Withstand Voltage | 6 kV |
| Terminal Type | Screw terminal |
| Mounting | First lateral auxiliary switch |
| Compatible Contactors | 3RT10, 3RT12, 3RT145, 3RT146, 3RT147 |
| Protection Degree (Front) | IP20 |
| Mechanical Durability | 10,000,000 operating cycles (typical) |
| Net Weight | 49.58 g |
Key Features
Screw Terminal Connection
It uses screw terminals for wiring in industrial control panel assemblies.
Lateral Mounting Design
It is designed as a first lateral auxiliary switch for mounting on the side of the contactor.
High Mechanical Durability
Published typical mechanical durability is 10,000,000 operating cycles.
AC-12 and AC-15 Ratings
It carries a 10 A AC-12 rating at 24 V and a 6 A AC-15 rating at 230 V for auxiliary control duties.
Applications
- Contactor auxiliary circuit expansion
- Industrial motor control panels
- Interlocking and status signaling
- 3RT1 series contactor installations
- Control panel maintenance and upgrades
- Relay logic circuits in automation systems
Purchase Information
We support online purchase of the Siemens 3RH1921-1DA11 Contactor 1NO 1NC. If you need to make bulk purchases and inquire about other products, please contact our team to inform us of your purchase requirements. We will provide you with information such as quantity quotations, delivery dates, and transportation methods.
Frequently Asked Questions
What is the Siemens 3RH1921-1DA11? The 3RH1921-1DA11 is a lateral auxiliary switch block for Siemens 3RT1 series contactors, not a complete contactor.
What is the contact configuration? It provides one normally open (1 NO) and one normally closed (1 NC) contact.
What is the rated current? It is rated for 10 A in AC-12 at 24 V and 6 A in AC-15 at 230 V.
What is the insulation voltage? The insulation voltage is 500 V, with a 6 kV impulse withstand voltage.
Which contactors is it compatible with? It is suitable for Siemens 3RT10, 3RT12, 3RT145, 3RT146, and 3RT147 contactors.
What should be checked before ordering? Confirm that the host contactor is within the compatible 3RT1 range and that the auxiliary contact ratings match the control circuit requirements.
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Send us your part number and technical requirements.
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