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header-product Surge Arrester Dehn DSH TT 255 Red, 230–400 V, thermoplastic, 0.1 m cable
557.99 €

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

Dehn DSH TT 255 surge arrester 230–400 V Photo 1
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Surge Arrester Dehn DSH TT 255 Red, 230–400 V, thermoplastic, 0.1 m cable

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

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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: 2 pcs.
Warranty: 2 Years
SKU: 11285144
Manufacturer: Dehn
free shipment

Cheapest delivery:

Unisend LV

Pick-up points

Unisend LV

Cost

1.79 €

Deliver

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Customer service center
2b. Kengaraga str., Riga, Latvia, LV-1063
13.08.2026 {{selectedOffer.officeDeliveryString}}
free
Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!
18.08.2026 {{selectedOffer.courierDeliveryString}}
From 4.99 € (Weight: 0.51 kg)
Parcel couriers
Unisend LV / Venipak Pickup LV / Venipak Locker LV / Latvijas Pasts pakomāts / DPD Paku skapis / Omniva LV / Latvijas Pasts nodaļa
18.08.2026 {{selectedOffer.parcelStationDeliveryString}}
From 1.79 €
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All payment Methods:
Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment
36 months installment: from 15.50 euros per month
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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

Cable length: How long the cable is.
0.1 m
Nominal input voltage: The voltage which the manufacturer recommends that the device needs to operate normally.
230 - 400
Product colour: The colour e.g. red, blue, green, black, white.
Red
AC outlet types: The type of outlet for AC electricity.
Terminal
All features

Packaging content

Number of products included: The number of products that are included in the package.
1 pc(s)

Certificates

Certification:
CE, KEMA, VDE, UL

Operational conditions

Operating temperature (T-T): The minimum and maximum temperatures at which the product can be safely operated.
-40 - 80

Weight & dimensions

Height: The measurement of the product from head to foot or from base to top.
90 mm
Depth: The distance from the front to the back of something.
72 mm
Width: The measurement or extent of something from side to side.
72 mm
Cable length: How long the cable is.
0.1 m
Weight: Weight of the product without packaging (net weight). If possible, the net weight is given including standard accessories and supplies. Please note that sometimes the manufacturer leaves out the weight of accessories and/or supplies.
0.48 kg

Features

Response time: The response time is the time difference between the moment that a source (for example a video card) sends a signal and that equipment (for example a monitor) receives or display the signal. (Used abbreviations: R/F = Rise and Fall.)
0.0001 ms
Over current protection:
Yes
Material: The material from which a thing is or can be made e.g. wood, plastic.
Thermoplastic
Product colour: The colour e.g. red, blue, green, black, white.
Red

Ports & interfaces

Cordless:
Yes

Power

Peak current, normal mode:
50000 A
AC input frequency:
50 - 60
Nominal input voltage: The voltage which the manufacturer recommends that the device needs to operate normally.
230 - 400
AC outlet types: The type of outlet for AC electricity.
Terminal

Description

Machine translation. Load original

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Customer 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 557.99 € (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 13.08.2026 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: cable length, nominal input voltage, 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.
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