# Promet NEF30TZbM 2-Position Key Switch, 30mm, 1NO 1NC, Momentary

**URL:** https://aio.lv/en/product--promet-w0-nef30-tzbm-xy--12459205
**Data updated:** 2026-05-18 09:27 (EEST)
**Category:** Control Systems
**Manufacturer:** Promet
**Manufacturer code:** W0-NEF30-TZBM XY
**EAN:** 5900103037130
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 59.49 €
**Prices and availability valid until:** 2026-08-08 23:59
**Price without VAT (21%):** 49.17 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--promet-w0-nef30-tzbm-xy--12459205

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 28.07.2026 | free |
| Pickup points | 31.07.2026 | 1.89 EUR |
| Courier delivery to door | 31.07.2026 | 4.99 EUR |

## Summary description

The Promet NEF30TZbM is a 30mm 2-position key-operated switch designed for industrial control panels. It features a momentary (non-latching) mechanism with 1 normally open (NO) and 1 normally closed (NC) contact. This robust switch provides secure access control and reliable switching functionality for various electrical automation systems and machinery control applications.

## Long description

The Promet NEF30TZbM is a professional-grade 30mm 2-position key-operated switch engineered for secure industrial control applications. This device features a momentary mechanism, meaning it returns to its default state once the key is released, providing precise control for automation systems. Equipped with one normally open (NO) and one normally closed (NC) contact, it offers versatile integration options for various electrical circuits and machinery control panels.
Advantages
This key switch stands out due to its robust construction, which ensures durability in demanding industrial environments. The use of a physical key provides an essential layer of security, preventing unauthorized personnel from operating critical machinery or changing system settings. Its compact 30mm design allows for efficient panel space utilization, while the reliable contact block configuration ensures consistent electrical performance and long-term operational stability.
Suitable for
Industrial control panels and automation systems
Machinery start and stop sequences
Secure access control for electrical equipment
Emergency override or reset functions
When it may not be suitable
This switch is not intended for applications requiring a maintained or latching position, as it is strictly a momentary device. It is also not designed for outdoor environments without appropriate protective enclosures, as it requires protection against moisture and dust ingress to maintain its operational integrity.
Key specifications
Mounting diameter: 30mm
Switch positions: 2
Operation type: Momentary
Contact configuration: 1 NO, 1 NC
Actuation method: Key-operated
How to use
To operate the switch, insert the provided key into the cylinder and rotate it to the desired position. Because the switch is momentary, it will spring back to its original position once the key is released. Ensure that the electrical connections are securely wired to the NO and NC terminals according to your specific circuit diagram before mounting the switch into the panel cutout.
What to consider before purchase
Verify that the 30mm mounting hole size matches your existing control panel layout.
Ensure the momentary operation aligns with your control logic requirements.
Confirm that the contact configuration (1NO/1NC) is sufficient for your application.
Usage recommendations
Always ensure the power supply is disconnected before installing or wiring the switch to prevent electrical hazards. Regularly inspect the key cylinder for debris to ensure smooth operation.

## FAQ

### How much does the Promet NEF30TZbM 2-Position Key Switch 30mm cost, and is it available for purchase?

The price is 59.49 € (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 28.07.2026 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 Promet 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 Promet 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

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