# F&F CZF-331 Three-Phase Voltage Loss Relay 3x400V+N 2NO/NC

**URL:** https://aio.lv/en/product--ff-czf-331--12447695
**Data updated:** 2026-05-18 02:47 (EEST)
**Category:** Sensors & Detectors
**Manufacturer:** FF
**Manufacturer code:** CZF-331
**EAN:** 5908312593157
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 35.99 €
**Prices and availability valid until:** 2026-07-07 23:59
**Price without VAT (21%):** 29.74 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ff-czf-331--12447695

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 01.07.2026 | free |
| Pickup points | 06.07.2026 | 1.99 EUR |
| Courier delivery to door | 06.07.2026 | 4.99 EUR |

## Summary description

The F&F CZF-331 is a professional three-phase voltage loss relay designed for 3x400V+N networks. It features 2NO/NC contact configuration to monitor phase sequence and voltage drops. This device ensures reliable protection for industrial and residential electrical systems by disconnecting power when phase failure occurs, preventing damage to connected equipment.

## Long description

The F&F CZF-331 is a professional three-phase voltage loss relay engineered for 3x400V+N electrical networks. This device serves as a critical safety component, continuously monitoring the presence of phases and the correct phase sequence. By detecting voltage drops or total phase loss, the relay triggers its 2NO/NC contact configuration to disconnect the power supply, thereby protecting sensitive industrial and residential equipment from potential damage caused by unstable power conditions.
Advantages
The primary benefit of the F&F CZF-331 is its ability to provide automated, real-time protection against electrical faults that could otherwise lead to costly equipment failure. Its robust design ensures high reliability in demanding environments, while the dual NO/NC contact arrangement offers versatile integration options for various control circuits. By reacting instantly to phase irregularities, it minimizes downtime and enhances the overall safety of the electrical installation.
Suitable for
Industrial motor protection systems
Residential three-phase power distribution boards
HVAC control panels
Automated machinery and production lines
Backup power and generator switching systems
When it may not be suitable
This relay is specifically designed for 3x400V+N systems and is not compatible with single-phase networks or systems operating at different voltage levels. It should not be used in environments where precise voltage regulation is required, as it is strictly a monitoring and protection device for phase loss and sequence.
Key specifications
Supply voltage: 3x400V+N
Contact configuration: 2NO/NC
Monitoring functions: Phase loss, phase sequence
Mounting type: DIN rail
How to use
The device is designed for installation on a standard DIN rail within an electrical distribution cabinet. Wiring should be performed by a qualified professional in accordance with the provided connection diagram, ensuring that all three phases and the neutral conductor are correctly terminated. Once installed, the relay operates automatically, monitoring the network status without the need for manual intervention.
What to consider before purchase
Verify that your electrical network is a 3x400V+N system
Ensure there is sufficient space on the DIN rail for installation
Confirm that the contact rating is compatible with your control circuit requirements
Usage recommendations
Regularly inspect the electrical connections to ensure they remain tight and free from oxidation to maintain the reliability of the monitoring function.

## FAQ

### How much does the F&F CZF-331 Three-Phase Voltage Loss Relay cost, and is it available for purchase?

The price is 35.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 9 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 01.07.2026 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 FF 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 FF 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/12447695/68750743_large.webp