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Home Product Center Power SPD Class II (T2) Power SPD KDY-20 DC surge protective device
KDY-20 DC surge protective device
DC Surge Protective Device (SPD), Maximum discharge current: 20kA
Product Features
  • High-grade surge protection components with high-energy surge suppression capability;
  • Modular plug-and-play design featuring sleek aesthetics;
  • Thermal-cutoff mechanism ensures extended service life with visual fault indication;
  • 20kA maximum discharge current with nanosecond-level response time (<25ns);
  • Standard DIN-rail mounting for tool-free installation and easy maintenance.
KDY-20 DC  surge protective device
Installation & Application(安装应用)

KDY-20 Modular DC Power Surge Protective Device is designed in accordance with GB18802.1 standards for lightning protection in DC power systems.

This product features high lightning current discharge capability, with each module capable of reaching a maximum discharge current of 20kA.

The product adopts standard 35mm rail mounting for easy installation, and individual modules are pluggable and replaceable.

Various corresponding specifications are available for different DC power supplies, and through different quantity combinations, it can be adapted to multi-circuit DC power supply systems.

Product Dimension Drawing

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Technical Parameters(技术参数)
ModelKDY-20-D220 /D110/D48KDY-20/D900 KDY-20/D600
Applicable Power SupplyDC220V, DC110V, DC48VDC900V, DC600V
Maximum Continuous Operating Voltage (Uc)DC320V, DC220V, DC85VDC1200V, DC800V
Voltage Protection Level (Up)1.5kV, 1.0kV, 500V3.2kV, 2.3kV
Maximum Discharge Current (Imax)20kA (8/20µs)20kA (8/20µs)
Nominal Discharge Current (In)10kA (8/20µs)10kA (8/20µs)
Upper Lead (+/-)≥2.5mm²≥2.5mm²
Lower Lead (PE)≥4mm²≥4mm²
SPD Protection Standard (EN61643-11)Type 2Type 2
Response Time (tA)<25ns<25ns
Operating Temperature (TU)-40°C to +70°C-40°C to +70°C
Protection RatingIP20IP20
Housing MaterialPA66 UL94-V-0PA66 UL94-V-0
Installation Method35mm DIN rail (EN 60715)35mm DIN rail (EN 60715)
*The product parameters are subject to the actual product manual.
Ordering and Model Selection(订货选型)

KDY-20-D48: Designed for 48V DC power systems

KDY-20-D110: Compatible with 110V DC power systems

KDY-20-D220: Suitable for 220V DC power systems

KDY-20/D600: Engineered for 600V DC power systems

KDY-20/D900: Optimized for 900V DC power systems


*Please send the inquiry email containing specific product requirements (such as model, quantity, technical parameters, etc.) to the designated email address  salina@kejia.com.    

(请将包含具体产品需求(如型号、数量、技术参数等)的询价邮件发送至指定邮箱 salina@kejia.com)


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