# Emas T0-B100A21 Key-Operated Control Switch, 1NO 0NC, Spring Return

**URL:** https://aio.lv/en/product--emas-t0-b100a21--12451387
**Data updated:** 2026-05-18 02:38 (EEST)
**Category:** Control Systems
**Manufacturer:** Emas
**Manufacturer code:** T0-B100A21
**EAN:** 5900103191429
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 19.99 €
**Prices and availability valid until:** 2026-07-16 23:59
**Price without VAT (21%):** 16.52 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--emas-t0-b100a21--12451387

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 07.07.2026 | free |
| Pickup points | 10.07.2026 | 1.99 EUR |
| Courier delivery to door | 10.07.2026 | 4.99 EUR |

## Summary description

The Emas T0-B100A21 is a professional key-operated control switch designed for secure industrial automation and control panel applications. It features a 1NO (normally open) contact configuration and a spring return mechanism for momentary operation. This robust switch ensures reliable switching performance and enhanced security through key access, making it ideal for critical control systems.

## Long description

The Emas T0-B100A21 is a professional-grade key-operated control switch engineered for secure industrial automation and control panel environments. This device provides a reliable interface for operators, ensuring that critical system functions are only accessible to authorized personnel holding the corresponding key. With its robust construction and precise mechanical design, it is built to withstand the demands of industrial use while maintaining consistent electrical performance.
Advantages
The primary benefit of this switch is the enhanced security provided by the key-operated mechanism, which prevents unauthorized access to machine controls. The spring return functionality ensures that the switch automatically returns to its default position after activation, providing a safe and predictable momentary operation. Its compact design allows for efficient integration into crowded control panels, while the high-quality materials ensure long-term durability and resistance to mechanical wear in demanding operational settings.
Suitable for
Industrial control panels and automation systems
Secure activation of machinery and equipment
Access control for critical electrical circuits
Momentary switching applications requiring authorized key access
This switch may not be suitable for applications requiring a maintained or latched contact state, as the spring return mechanism forces the switch back to its original position immediately upon release. It is also not intended for high-power direct load switching without appropriate contactors or relays.
Key specifications
Contact configuration: 1NO (Normally Open)
Operation type: Spring return (momentary)
Actuation method: Key-operated
Application: Industrial control panels
To use the Emas T0-B100A21, mount the switch into a standard panel cutout and secure it firmly using the provided locking nut. Connect the electrical wires to the 1NO contact terminals according to your circuit diagram. Insert the key and turn it to activate the momentary contact; upon releasing the key, the internal spring will automatically return the switch to the off position.
What to consider before purchase
Verify that the 1NO contact configuration meets your specific circuit requirements
Ensure the panel cutout dimensions are compatible with the switch mounting diameter
Confirm that a momentary (spring return) action is appropriate for your control logic
For optimal performance and safety, ensure that all electrical connections are tightened to the manufacturer's specified torque and that the switch is protected from excessive dust or moisture if installed in harsh environments.

## FAQ

### How much does the Emas T0-B100A21 Key-Operated Control Switch cost, and is it available for purchase?

The price is 19.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 07.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Emas products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Emas service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12451387/68754083_large.webp