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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)
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) |
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 |
