3RH1921-1EA11 - 1NO-1NC Aux. Contact
Purchase Options: New
3RH1921-1EA11 - 1NO-1NC Aux. Contact Description
3RH1921-1EA11 - 1NO-1NC Aux. Contact
When you need to add auxiliary contacts to a Siemens contactor, you don’t want to overthink it—you want something that fits right, works every time, and doesn’t slow you down. The Siemens 3RH1921-1EA11 auxiliary switch block does exactly that. Built for the SIRIUS 3RT series contactors, this side-mounted auxiliary switch gives you a simple way to add 1 normally open (NO) and 1 normally closed (NC) contact for signaling or control. It’s a go-to option for handling feedback circuits, interlocks, or status indication in just about any control panel setup. What stands out here is how straightforward it is. The snap-on mounting clicks into place without hassle, and the screw terminals keep wiring secure without fighting with the connection. Once it’s in, it stays put—and more importantly, it keeps working. With a mechanical life rated around 10 million cycles, this isn’t something you’ll be replacing anytime soon. It’s compact, dependable, and designed for real-world use where panels get tight and uptime matters.
Key Features and Benefits
- 1NO + 1NC configuration: Covers most control and signaling needs
- Made for Siemens 3RT contactors: Clean, proper fit with no guesswork
- Side-mount, snap-on design: Quick install, no extra tools needed
- Long operating life: Built for high-cycle applications
- Compact footprint: Doesn’t eat up panel space
- Screw terminals: Simple, secure wiring connections
Technical Specifications
- Catalog Number: 3RH1921-1EA11
- Series: SIRIUS 3RH19
- Contacts: 1 NO + 1 NC (instantaneous)
- Rated Insulation Voltage: 500 V
- Surge Voltage Rating: 6 kV
- AC-12 Current: Up to 10 A
- AC-15 Current: 6 A (230 V), 3 A (400 V)
- DC-13 Current: Up to 6 A (24 V)
- Mechanical Life: ~10,000,000 operations
- Electrical Life: ~200,000 operations (AC-15, 230 V)
- Protection Rating: IP20
- Mounting: Snap-on, side-mounted
- Terminal Type: Screw terminals
- Wire Size: 0.5–2.5 mm² (20–14 AWG)
- Dimensions: 80 mm x 10 mm x 71 mm
- Operating Temp: -25°C to +60°C
Material Compliance and Certifications
- RoHS compliant
- REACH compliant
- Meets IEC 60947 standards
- Supports mirror contact function (with compatible contactors)
Where It Works Best
- Control panels and industrial enclosures
- Motor starters and MCCs
- Automation systems
- HVAC control setups
- Conveyor and production equipment
Use of Original Equipment Manufacturer (OEM) trademarks, names, and logos is for informational and identification purposes only. This does not imply any affiliation, sponsorship, endorsement, or approval by the original equipment manufacturer. CIRCUIT BREAKER SUPERSTORE® is an independent reseller and is not an authorized distributor, affiliate, or representative of any manufacturer. Manufacturer warranties do not apply unless expressly stated. All trademarks and registered trademarks are the property of their respective owners.
Siemens®, I-T-E®, and Murray® are registered trademarks of Siemens AG. Products sold are surplus, used, or refurbished and are NOT supplied by Siemens AG or its affiliates.
Specifications
- Depth:1.929
- Height:3.74
- Width:3.386
- Type:3RH
- Sub-Category:Auxiliary Contact
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