# Surge Arrester Dehn DSH TT 255 Red, 230–400 V, thermoplastic, 0.1 m cable

**URL:** https://aio.lv/en/product--dehn-941310--11285144
**Data updated:** 2026-03-11 12:03 (EET)
**Category:** Power Extension Cords & Surge Protectors
**Manufacturer:** Dehn
**Manufacturer code:** 941310
**EAN:** 4013364131798
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 372.49 €
**Prices and availability valid until:** 2026-07-19 23:59
**Price without VAT (21%):** 307.84 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--dehn-941310--11285144

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 13.07.2026 | free |
| Pickup points | 16.07.2026 | 1.99 EUR |
| Courier delivery to door | 16.07.2026 | 4.99 EUR |

## Summary description

Dehn DSH TT 255 is a compact surge arrester for TN/TT systems with nominal voltage 230–400 V and 50–60 Hz frequency. It features a thermoplastic housing, very fast response time (0.0001 ms), AC terminal outlet, 0.1 m connection cable and 72 mm width. Certified to CE, KEMA, VDE and UL standards. Suitable for protection of electrical installations and equipment against lightning and surge transients.

## Long description

Dehn DSH TT 255 Red is a compact, prewired combined lightning current and surge arrester designed for TN and TT systems with a nominal voltage of 230–400 V and a frequency of 50–60 Hz. The device uses spark-gap-based technology in a thermoplastic housing to provide type 1 and type 2 protection in a 3+1 configuration. With a width of only 72 mm (one module/pole) and a 0.1 m connection cable, the arrester is intended for integration into distribution boards and for use in equipotential bonding to protect terminal equipment and electrical installations against lightning and surge transients. The unit features a very fast response time, clear operating/fault indication and a high discharge capacity for handled lightning currents.
Advantages
The surge arrester offers a compact design that saves space in switchgear and distribution enclosures while combining lightning current and surge protection in a single prewired unit. Spark-gap technology ensures high discharge capacity and reliable handling of high-energy lightning impulses with follow-current extinguishing capability. A green/red indicator flag in an inspection window provides visible operating-state and fault indication. The thermoplastic housing and standardized AC terminal outlet support easy installation and compliance with recognized safety standards.
Suitable for
Protection of residential and commercial distribution boards against lightning and surge transients
Equipotential bonding of incoming services in TT and TN-S systems
Prewired overvoltage protection for terminal equipment such as control devices, meters and communication interfaces
Key specifications
Nominal system voltage: 230–400 V, 50–60 Hz
Configuration: 3+1 combined lightning current and surge protection
Technology: spark-gap based type 1 and type 2 protection
Maximum discharge current: up to 50 kA (10/350 µs waveform)
Follow-current extinguishing capacity: Ifi = 25 kArms
Response time: very fast (0.0001 ms)
Housing material: thermoplastic
Width: 72 mm (1 module/pole)
Connection: prewired with 0.1 m cable and AC terminal outlet
Operating/fault indication: green/red indicator flag in inspection window
How to use
Install the arrester in the distribution board according to applicable wiring regulations and the system configuration (TT or TN-S). Connect the prewired cable to the designated terminal points, ensure secure protective earth connection and mount the device on the DIN rail. Verify the correct orientation and that the inspection window is accessible for visual status checks. After installation, confirm continuity of equipotential bonding and test the electrical installation following local safety procedures.
Usage recommendations
Locate the arrester close to the incoming service or main distribution point to minimise conductor length between the arrester and the protected installation. Periodically inspect the indicator window for the operating/fault flag and perform maintenance or replacement after a lightning event or if the indicator shows a fault. Follow national wiring standards and manufacturer installation instructions for earthing and coordination with upstream and downstream protective devices to ensure effective surge protection.

## Specifications

### Ports & interfaces

| Feature | Value |
|---|---|
| Cordless | Yes |

### Certificates

| Feature | Value |
|---|---|
| Certification | CE, KEMA, VDE, UL |

### Operational conditions

| Feature | Value |
|---|---|
| Operating temperature (T-T) | -40 - 80 |

### Power

| Feature | Value |
|---|---|
| Nominal input voltage | 230 - 400 |
| Peak current, normal mode | 50000 A |
| AC outlet types | Terminal |
| AC input frequency | 50 - 60 |

### Features

| Feature | Value |
|---|---|
| Material | Thermoplastic |
| Response time | 0.0001 ms |
| Product colour | Red |
| Over current protection | Yes |

### Packaging content

| Feature | Value |
|---|---|
| Number of products included | 1 pc(s) |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.48 kg |
| Cable length | 0.1 m |
| Height | 90 mm |
| Width | 72 mm |
| Depth | 72 mm |

## FAQ

### How much does the Dehn DSH TT 255 surge arrester 230–400 V cost, and is it available for purchase?

The price is 372.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 4 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 13.07.2026 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, Installment. All transactions are 100% secure and encrypted.

### Can Dehn DSH TT 255 surge arrester 230–400 V be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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 Dehn 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 Dehn 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

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: weight, cable length, product colour, ac outlet types, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/11285144/64472996_large.webp