EKU5-T1+T2-7 Combined Class I+II Surge Protector with 7kA Impulse Discharge Current
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Technical Data
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| Product Family ID | OS-ETK-EKU5-T1PLUST2-7 |
|---|---|
| Variant SKU Count | 6 |
| Supplier | ETK |
| Supplier Model | EKU5-T1PLUST2-7 |
| Product Type | Surge Protective Device |
| Available Voltage Ratings | 150, 275, 320, 385, 440V AC |
| Available Poles | 1P / 1P+NPE / 2P / 3P / 3P+NPE / 4P |
| Rated Voltage | 150, 275, 320, 385, 440V AC |
| Protection Degree | IP20 (built-in) |
| Iec Category | Type 1+2 |
| Impulse Discharge Current | 7kA |
| Maximum Discharge Current | 50kA |
| Nominal Discharge Current | 25kA |
| Poles | 1P, 2P, 3P, 4P, 1P+NPE, 3P+NPE / 1P / 1P+NPE / 2P / 3P / 3P+NPE / +1 more |
| Protection Degree | IP20 (built-in) |
| Rated Voltage | 150, 275, 320, 385, 440V AC |
| Standard | IEC/EN61643-11 |
Product Overview
7kA Iimp combined Class I+II SPD for buildings where the lightning protection level assigns a lower partial current to the incoming service entry. The same six pole configurations as the 12.5kA version cover all supply arrangements — select between 7kA and 12.5kA based on the calculated lightning current allocation.
In many standard commercial buildings with a lightning protection system shared across multiple entry points, 7kA Iimp per conductor is the calculated requirement. For buildings with higher LPL classifications, specify 12.5kA.
The 7kA impulse current rating is suitable for residential and small commercial installations where the building has basic lightning protection or is located in a low lightning incidence zone. For sites with high annual lightning days or proximity to elevated structures, specify the higher-rated 12kA or 40kA variant.
Applications
Inverter output protection
AC distribution boards
EV and PV support circuits
Residential and commercial electrical BOS
Certifications & Compliance
Frequently Asked Questions
When is 7kA Iimp sufficient for a Type 1 SPD?
The required Iimp is calculated from the lightning protection level (LPL) and the number of incoming conductors sharing the lightning current. For LPL III/IV buildings with multiple service entries, 7kA per conductor is typically sufficient — the lightning protection designer will specify the required level.
What voltage class UC should I select?
The UC voltage must exceed the system maximum continuous voltage: 275V for 230V AC systems, 385V or 440V for 400V AC three-phase systems. An undersized UC causes the MOV to conduct continuously and overheat.
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