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Siemens Auxiliary, spring-loaded terminal, 2NC
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Product Description
Product Overview
The Siemens SIRIUS auxiliary switch block 3RH2911-2HA02 is designed for front-mount attachment to size S00 contactors and relays. It features two normally-closed (2 NC) instantaneous auxiliary contacts, spring-loaded terminals, and supports integration with Siemens 3RT2 contactors and 3RH2 relay series. With compact dimensions and robust electrical ratings, it provides reliable status feedback and control circuit integration in industrial switching applications.
Key Features
- Contact Configuration: 2 NC instantaneous auxiliary contacts (no NO contacts)
- Mounting Style: Snap-on mounting to the front of size S00 contactors or relays
- Connection Type: Spring-loaded terminals for fast, secure wiring
- High Insulation Rating: 690 V AC rated insulation voltage (pollution degree 3)
- Surge Withstand Voltage: 6 kV for enhanced electrical robustness
- Compact Dimensions: Width 36 mm × Height 41.5 mm × Depth 47.7 mm
- Mounting Width: 36 mm (approx. 2 module widths) for space-efficient panel installation
- Ambient Temperature Range: –25 °C to +60 °C (operation); –55 °C to +80 °C (storage)
Technical Specifications
- Product Series: SIRIUS 3RH29 auxiliary switch blocks
- Auxiliary Circuit Contacts: 2 × NC instantaneous
- Rated Insulation Voltage (Ui): 690 V AC (pollution degree 3)
- Surge Voltage Resistance: 6 kV
- Mechanical Endurance (Typical): 10 000 000 operations
- Electrical Endurance (AC-15, 230 V): 200 000 operations (typical)
- Auxiliary Contact Ratings (AC-12): 10 A at 24 V or 230 V
- Auxiliary Contact Ratings (AC-15): 6 A at 24 V/230 V, 3 A at 400 V, 1 A at 690 V
- Auxiliary Contact Ratings (DC-12): 10 A at 24 V etc.
- Termination Size: Solid/stranded 0.5…2.5 mm², spring-type terminals (AWG 20…14)
- Protection Class: IP20 (front, as installed)
- Country of Origin: Germany
Compliance & Certifications
- Functional Certification: Mirror contact according to IEC 60947-4-1; positively driven operation according to IEC 60947-5-1
- CE Marking: Complies with European Low-Voltage and Machinery Directives
- RoHS Compliant: Conforms to Siemens restriction on hazardous substances (since 01 Oct 2009)
- WEEE: Take-back obligation applies in applicable regions
- Product Classification: Industrial auxiliary switch module
Applications
Ideal as an auxiliary switch block for contactor or relay circuits where two normally-closed contacts are required for feedback, interlocking, or signalling. Commonly used in industrial control panels, motor starters, automation systems, building services installations, and switchgear where reliable status indication or safe circuit separation is needed.
Key Siemens Features
| Rated operation current Ie at AC-15, 230 V | 6 A |
|---|---|
| Number of contacts as normally closed contact | 2 |
| Number of contacts as change-over contact | 0 |
| Number of contacts as normally open contact | 0 |
| Number of fault-signal switches | 0 |
| Type of electric connection | Spring clamp connection |
| Mounting method | Other |
Searchable Keywords
3RH29
AC3
AC4
Accessory 3RT2
Accessory Contactor
Auxiliary Contact
Auxiliary Switch Block
Contact Multiplication
Contactor
Contactor Circuit
Contactor assemblies
Contactor assembly
Durable
High Switching Frequency
Inching Mode
Instantaneous
Instantaneous Auxiliary Switch
Line Contactor
Long Operating Life
Master Contactor
Replacement Parts
Reverse
SIRIUS
Safe Switchting
Spare Parts
Spare Parts 3RT2
Spare Parts Contactor Relay
Spare PartsContactor
Switchgear
Switching devices
Ulitization Category
contact block
contactor module
contactor switch
leading
load contactor
load switching
motor starting
motor switch
Packaging & Logistics
Minimum Pack Quantity
1
Maximum Pack Quantity
1
Packaging Code
PA
Shipping Weight
0.05 kg
Carton Length
5.8 cm
Carton Width
5.7 cm
Carton Height
4.7 cm
Technical Documentation & Downloads
Siemens Downloads
Additional Siemens Documents
Helpful Siemens Links
- Temperature Rise in Control Panels
- SIRIUS Control for high-efficient wood working machines
- Do you know the advantages of spring loaded technology?
- SIRIUS spring loaded technology saves time and increases productivity
- Link to Certificates
- Link to Manual
- Link to SiePortal
- Link to Product page
- Link to Sales brochure
- Link to Technical data sheet
- Link zum 3D CAD Modell
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