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Home Product Center Power SPD Class II (T2) Power SPD KDY-40 DC
surge protective device
KDY-40 DC
surge protective device
DC Surge Protective Device (SPD), Maximum discharge current: 40kA
Product Features
  • Premium surge protection components deliver high-energy transient suppression.
  • Modular plug-and-play design combines aesthetic appeal with functional reliability.
  • Thermal disconnect mechanism ensures extended service life with visual fault indication.
  • 40kA maximum discharge capacity with nanosecond-level response time (<25ns).
  • Standard DIN-rail mounting enables tool-free installation and maintenance.
KDY-40 DC <br/> surge protective device
Installation & Application(安装应用)

The KDY-40 Modular DC Surge Protective Device (SPD) is designed in compliance with GB18802.1 standards for lightning protection in DC power systems.

Key Features:

  • High lightning current discharge capacity (40kA max per module)

  • 35mm standard DIN-rail mounting for easy installation

  • Hot-swappable modular design for maintenance convenience

  • Configurable multi-module setups for multi-circuit DC systems

Technical Specifications:

Standard: GB18802.1 compliant

Discharge Current: 40kA/module (8/20μs)

Mounting: 35mm DIN rail

Design: Plug-and-play modular replacement

Application: Scalable for various DC voltages (48V-900V)


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Technical Parameters(技术参数)
Model KDY-20-D220 /D110/D48 KDY-20/D900 KDY-20/D600
Applicable Power Supply DC220V, DC110V, DC48V DC900V, DC600V
Maximum Continuous Operating Voltage (Uc) DC320V, DC220V, DC85V DC1200V, DC800V
Voltage Protection Level (Up) 1.5kV, 1.0kV, 500V 3.2kV, 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 2 Type 2
Response Time (tA) <25ns <25ns
Operating Temperature (TU) -40°C to +70°C -40°C to +70°C
Protection Rating IP20 IP20
Housing Material PA66 UL94-V-0 PA66 UL94-V-0
Installation Method 35mm 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-40-D48 : Designed for 48V DC power systems.

KDY-40-D110: Compatible with 110V DC power systems.

KDY-40-D220: Suitable for 220V DC power systems.

KDY-40/D600: Engineered for 600V DC power systems.

KDY-40/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)


Download
File name Product type Download
KDY-40-D220 DC
surge protective device
Instruction Manual Download
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