Rittal DK 7979.721 Overvoltage Module - Type 3 CE
Part Number: 7979721
Manufacturer
Rittal
Part number
7979721
Category
Alt Part Number
DK 7979.721
Quick Summary
The Overvoltage Module DK 7979.721 protects terminal equipment in enclosure-mounted surge protection for industrial control panels. Too often, installations suffer from uncoordinated protection devices and lengthy wiring, delaying maintenance and increasing downtime. Designed to meet Low Voltage Directive 2014/35/EU and IEC 61 643-11 standards, with CE certification for safe European operation. For engineers, its fully wired, ready-to-connect configuration reduces commissioning time, while compatible enclosure-frame mounting supports compact, scalable protection. The inclusion of 1 m input and output cables and assembly parts further accelerates deployment across panels. Its robust aluminium housing and anodised finish also withstand demanding industrial environments. This delivers reliable protection with minimal maintenance, even in harsh, crowded switchgear rooms.
Product Information
Extended Description
7979721 Rittal: DK surge voltage protector module, for terminal unit protection (type 3) with alarm contact, for fastening to the enclosure frame, rated power: 3.7 kW, rated current: 16 A, 1~, connection type: CEE connector/coupling, connection cable / length: H05VV F3G2.5 / 1 m, extruded aluminium section, anodised, RAL 9005, incl. assembly parts, DK surge voltage protector module
Article number
DK 7979.721
Design
Overvoltage protection type 3
Product description
Compact overvoltage protection module for protecting terminal equipment (type 3) with alarm contact, for mounting on the enclosure frame. The modules are used to protect sensitive hardware and represent the third or final stage in the overvoltage protection chain. Additionally, other type 1 or type 2 overvoltage protective devices must be present in the building installation or power distribution system.
Benefits
Fully wired overvoltage protection solution, ready to connect and use immediately
Material
Extruded aluminium section, anodised
Colour
RAL 9005
Supply includes
Assembly parts
Power consumption
3.7 kW
Type of electrical connection
CEE connector/coupling
Rated current (max.)
16 A
Directives
Low Voltage Directive 2014/35/EU
Standards
IEC 61 643-11
Dimensions
Width:Â 44 mm | Height:Â 75 mm | Length:Â 250 mm
Input cable connection (type/length)
H05VV-F3G2.5, 1 m
Output cable connection (type/length)
H05VV-F3G2.5, 1 m
Packs of
1 pc(s).
Weight/pack
2.98 kg
Customs tariff number
85366990
EAN
4028177948525
ETIM 9
EC000942
ECLASS 8.0
27130806
Product description
DK surge voltage protector module, for terminal unit protection (type 3) with alarm contact, for fastening to the enclosure frame, rated power: 3.7 kW, rated current: 16 A, 1~, connection type: CEE connector/coupling, connection cable / length: H05VV F3G2.5 / 1 m, extruded aluminium section, anodised, RAL 9005, incl. assembly parts, DK surge voltage protector module
Feature → Business Impact → Application: Compact, fully wired overvoltage protection module designed for enclosure-frame mounting to protect terminal equipment (type 3). The business impact is a faster, error-free installation since the unit ships fully wired with assembly parts and an integrated alarm contact, reducing commissioning time and field wiring mistakes. Application: Ideal for control panels and machine enclosures requiring dependable final-stage surge protection in crowded, vibration-prone environments. Feature → Business Impact → Application: Final-stage protection aligned with Type 1/2 devices, meeting IEC 61 643-11 and Low Voltage Directive (EU) 2014/35/EU; CE certified. The business impact is improved system reliability and regulatory compliance across the installation, simplifying audits and reducing risk of equipment damage. Application: Suitable for panel builders integrating into complete protection chains within industrial power distribution. Feature → Business Impact → Application: Input and output connections use a CEE connector and matched 1 m H05VV-F3G2.5 cables, delivering a plug-and-play wiring experience. The business impact is faster integration with reduced risk of incorrect polarity or mismatched cables, alongside straightforward replacement if service is required. Application: Fits onto enclosure frames in new builds and refurbishments where quick, verifiable connections matter. Feature → Business Impact → Application: Robust extruded aluminium section, anodised in RAL 9005, provides durable housing resistant to heat, dust, and impact. The business impact is lower maintenance costs and longer service life in demanding environments. Application: Suitable for harsh industrial locations such as steel plants, packaging lines, and process automation cabinets. Feature → Business Impact → Application: 3.7 kW rated power, 16 A current, 1~ operation with CEE connection, and 1 m input/output cables; supply includes assembly parts. The business impact is predictable protection against surge events with scalable control, enabling consistent uptime. Application: Ideal for compact frame-mounted protection in modern machine architectures.
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FAQs
The DK 7979.721 is designed for direct mounting on standard enclosure frames and integrates with other protection devices in the Type 3/Type 1-2 protection chain. It uses a CEE connector/coupling and comes with 1 m input and 1 m output cables plus assembly parts, simplifying retrofits and new builds in Rittal systems.
Key specs include 3.7 kW rated power, 16 A rated current, and 1-phase operation (1~) with CEE connector. It uses 1 m input and 1 m output cables and mounts on the enclosure frame. Compliance includes Low Voltage Directive 2014/35/EU and IEC 61 643-11, with a weight of 2.98 kg and dimensions 44 Ă— 75 Ă— 250 mm.
In industrial control panels, machine enclosures, and process lines needing final-stage surge protection, the DK 7979.721 excels. It protects terminal units after Type 1/2 devices, preventing downstream damage. The integrated alarm contact enables proactive fault signaling, while the compact form factor supports dense panel layouts and easier component replacement during routine maintenance.
Key standards and certifications include CE marking with compliance to Low Voltage Directive 2014/35/EU and IEC 61 643-11, supporting EU-wide safety compliance. The product carries EAN 4028177948525 and customs tariff 85366990, with ETIM 9 EC000942 and ECLASS 8.0 27130806 classifications. These credentials simplify regulatory audits, component sourcing, and integration into compliant electrical distributions.
As a fully wired, ready-to-connect solution, maintenance is minimized; alarm contact helps early fault detection; assembly parts included speed field upgrades; reliable housing reduces replacement costs; typical ROI achieved via reduced downtime and faster commissioning. Users experience predictable performance in ongoing operations, as the module's 1 m cables and CEE connection standardize wiring, minimizing spare part diversity and improving service turnaround times.