# Phoenix Contact TB 4 I BU Essential 2-conductor terminal block, 4mm2, 32A, 800V, blue

**URL:** https://aio.lv/en/product--phoenix-contact-3057678--12464581
**Data updated:** 2026-05-18 09:42 (EEST)
**Category:** Power Sockets
**Manufacturer:** PHOENIX-CONTACT
**Manufacturer code:** 3057678
**EAN:** 4046356648233
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 3.99 €
**Prices and availability valid until:** 2026-07-20 23:59
**Price without VAT (21%):** 3.30 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--phoenix-contact-3057678--12464581

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

The Phoenix Contact TB 4 I BU Essential is a high-quality 2-conductor DIN rail terminal block designed for secure electrical connections. Featuring a 4mm2 cross-section, it supports a rated current of 32A and a voltage of 800V. This blue terminal block is engineered for reliable performance in industrial control cabinets and distribution systems, ensuring efficient wiring and long-term durability in various electrical installations.

## Long description

The Phoenix Contact TB 4 I BU Essential is a professional-grade 2-conductor terminal block designed for reliable wire termination on DIN rails. Engineered for industrial applications, this component provides a secure and stable connection for electrical conductors with a cross-section of 4mm2. Its robust construction ensures consistent performance in demanding environments, making it a dependable choice for modern electrical distribution systems.
Advantages
This terminal block offers exceptional mechanical stability and electrical conductivity, ensuring minimal power loss and long-term operational safety. The design facilitates efficient space utilization within control cabinets, allowing for organized and clear wiring layouts. Its high-quality materials provide resistance to environmental factors, while the standardized interface ensures compatibility with a wide range of industrial electrical equipment.
Suitable for
Industrial control cabinets
Power distribution systems
Automation technology installations
General electrical panel wiring
When it may not be suitable
This terminal block is not intended for use with conductors exceeding the specified 4mm2 cross-section or for applications requiring higher current ratings than 32A. It is also not suitable for direct outdoor exposure without a protective enclosure.
Key specifications
Conductor cross-section: 4mm2
Rated current: 32A
Rated voltage: 800V
Connection type: 2-conductor
Mounting type: DIN rail
Color: Blue
How to use
To install the terminal block, snap it onto a standard DIN rail until it clicks securely into place. Strip the insulation from your electrical wires according to the required length, insert the conductor into the terminal opening, and tighten the screw connection to the specified torque to ensure a firm grip. Ensure that all connections are clean and free of debris before finalizing the installation.
What to consider before purchase
Verify that the conductor size matches the 4mm2 capacity.
Ensure the DIN rail type is compatible with the mounting mechanism.
Check that the voltage and current requirements of your circuit do not exceed the rated limits.
Confirm the color coding requirements for your specific wiring project.
Usage recommendations
For optimal safety and performance, always use appropriate wire ferrules when connecting stranded conductors and ensure that all terminal screws are tightened to the manufacturer's recommended torque settings.

## FAQ

### How much does the Phoenix Contact TB 4 I BU Essential 2-conductor terminal block cost, and is it available for purchase?

The price is 3.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 411 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 14.07.2026 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 PHOENIX-CONTACT 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 PHOENIX-CONTACT 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/12464581/68766220_large.webp