Siemens Auxiliary Switch Block, 2 Contact, 1 NO/1 NC, SIRIUS, Snap-On, 10 A, 500V, 3RH1921-1DA11
- RS Stock No.:
- 745-0698
- Mfr. Part No.:
- 3RH1921-1DA11
- Brand:
- Siemens
Subtotal (1 unit)*
£10.83
(exc. VAT)
£13.00
(inc. VAT)
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In Stock
- Plus 79 unit(s) shipping from 27 April 2026
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Units | Per unit |
|---|---|
| 1 + | £10.83 |
*price indicative
- RS Stock No.:
- 745-0698
- Mfr. Part No.:
- 3RH1921-1DA11
- Brand:
- Siemens
Specifications
Technical Reference
Legislation and Compliance
Product Details
Find similar products by selecting one or more attributes.
Select all | Attribute | Value |
|---|---|---|
| Brand | Siemens | |
| Product Type | Auxiliary Switch Block | |
| Number of Contacts | 2 | |
| Normal State Configuration | 1 NO/1 NC | |
| Series | SIRIUS | |
| Mount Type | Snap-On | |
| Contact Current | 10A | |
| Terminal Type | Screw | |
| Contact Voltage | 500V | |
| Mechanical Durability | 10000000Cycles | |
| Rated Insulation Voltage Ui | 500V | |
| Minimum Operating Temperature | -25°C | |
| Mounting Location | Lateral | |
| Operational Current Ie | 10A | |
| Maximum Operating Temperature | 60°C | |
| Standards/Approvals | KC, IEC 60947-5-1, IEC 60947-4-1 | |
| Select all | ||
|---|---|---|
Brand Siemens | ||
Product Type Auxiliary Switch Block | ||
Number of Contacts 2 | ||
Normal State Configuration 1 NO/1 NC | ||
Series SIRIUS | ||
Mount Type Snap-On | ||
Contact Current 10A | ||
Terminal Type Screw | ||
Contact Voltage 500V | ||
Mechanical Durability 10000000Cycles | ||
Rated Insulation Voltage Ui 500V | ||
Minimum Operating Temperature -25°C | ||
Mounting Location Lateral | ||
Operational Current Ie 10A | ||
Maximum Operating Temperature 60°C | ||
Standards/Approvals KC, IEC 60947-5-1, IEC 60947-4-1 | ||
- COO (Country of Origin):
- RO
Siemens Auxiliary Switch Block, NO/NC Contacts, 80mm Height - Sirius Classic Series - 3RH1921-1DA11
Use this auxiliary switch block from Siemens to monitor the performance of your contactor. It's compatible with contactor relays and power contactors from the 3RH series, so fits easily into existing setups. The unit works by sending a signal to the control system if it detects any changes in the contactor. A broad operating temperature range between -25°C and +60°C means it can withstand harsh environments. You can use this component to signal indication and alarm systems in your control panel.
• Surge voltage resistance of 6kV to withstand current overloads
• Screw-type terminals for secure electrical connection
How durable is this auxiliary switch block?
This component has a mechanical service life of 10 million switching cycles, so you can rely on it for long-term performance. For added durability, it has a contact reliability rating of one incorrect switching operation in 100 million operations, minimising the risk of failure in demanding conditions.
How do I mount this auxiliary switch block?
Thanks to the snap-on mounting, you can simply clip it onto the contactor for tool-free installation. Its compact dimensions of 10 (W) x 80 (H) x 71mm (D) will fit easily in a busy setup.