Dehn DSH TT 255 surge arrester 230–400 V

Name: Surge Arrester Dehn DSH TT 941310
Brand: Dehn
SKU: 11285144
Price: 373.49 EUR
Availability: InStock

JBL – powerful sound always with you

JBL speakers and headphones for pure and deep sound!

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

Keep track of price changes You keep track of price changes

Scan qr code below, or type in manually: {{secretKey}}

Forgot password? Registration

Short 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.

Available for order: 5 pcs.

Warranty: 2 Years

SKU: 11285144

Manufacturer: Dehn

Learn more

Deliver the order:

{{ userCountryName }}

to the Customer Service Center at Kengaraga 2b, Riga

08.07.2026 {{selectedOffer.officeDeliveryString}}

free

All delivery methods Hide details

Customer service center

2b. Kengaraga str., Riga, Latvia, LV-1063

08.07.2026 {{selectedOffer.officeDeliveryString}}

free

Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!

13.07.2026 {{selectedOffer.courierDeliveryString}}

From 4.99 € (Weight: 0.51 kg)

Parcel couriers

Latvijas Pasts pakomāts / Unisend LV / DPD Paku skapis / Omniva LV / Venipak Pickup LV / Venipak Locker LV / Latvijas Pasts nodaļa

13.07.2026 {{selectedOffer.parcelStationDeliveryString}}

From 1.99 €

More about delivery methods

pay in 3 equal parts

today

0 €

afterward

3 mth. х 124.5 €

overpayment

0 €

All payment Methods Hide details

All payment Methods:

Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment

36 months installment: from 10.37 euros per month

More about payment methods

You saving {{productBundleYouSave | formatAmount}}

Product information

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

Weight:: 0.48 kg
Cable length:: 0.1 m
Product colour:: Red
AC outlet types:: Terminal

All features

Ports & interfaces

Cordless:: Yes

Certificates

Certification:: CE, KEMA, VDE, UL

Operational conditions

Operating temperature (T-T):: -40 - 80

Power

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

Features

Material:: Thermoplastic
Response time:: 0.0001 ms
Product colour:: Red
Over current protection:: Yes

Packaging content

Number of products included:: 1 pc(s)

Weight & dimensions

Weight:: 0.48 kg
Cable length:: 0.1 m
Height:: 90 mm
Width:: 72 mm
Depth:: 72 mm

Hide Show all

Description

Machine translation. Load original

{{highlightedFeature.featureTitle}}:

{{getProductFeatureValueById(product, highlightedFeature.featureId)}}

Customer reviews

Show all reviews

Customer questions

FAQ

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

The price is 373.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 5 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 08.07.2026 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. We work with leading banks and leasing companies in Latvia, allowing you to make your purchase on convenient terms — with a minimal down payment and a repayment period from 3 to 36 months. You can apply for credit or installments for the Dehn DSH TT 255 surge arrester 230–400 V online, and the application process is as simple as possible:

Select the product on the website and add it to your cart;
When placing your order, choose the payment method “Installments”;
Fill in the required details for the lending partner;
Receive a decision within a few minutes.

For more information about available payment options, interest-free installment terms, and credit conditions in Latvia, please visit the Payment page.

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. We will assist with consultation, warranty claim processing, and coordination with certified service centers.

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.

Show all questions