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Installation & Application（安装应用） KDY-20B PCB-mounted Surge Protective Device (SPD) is a modular power SPD unit, suitable for installation at the power input terminal of circuit boards. This SPD module features a fully sealed enclosure with waterproof and dustproof protection, compliant with IP65 protection grade, classified as a Type 3 power SPD.
The SPD utilizes high-energy voltage-limiting components for protection, with:
High current-handling capacity
Low residual voltage
Leakage current interruption
Dynamic thermal disconnect function
The product has a compact size and adopts PCB-soldered mounting. Depending on the number of power lines, 1P to 4P SPD combinations can be selected, making it highly convenient to use. It serves as an ideal surge and transient protection solution for the power input terminals of PCBs in instruments and equipment.
Technical Parameters（技术参数） | Specification | KDY-20B |
|---|---|
| SPD Model | KDY-20B |
| Rated Voltage (Un) | 380V/500V |
| Maximum Continuous Operating Voltage (Uc) | 385V/510V |
| Nominal Discharge Current (In) (8/20µs) | 10kA |
| Maximum Discharge Current (Imax) (8/20µs) | 20kA |
| Voltage Protection Level (Up) | ≤1.5kV/1.9kV |
| Response Time | 25ns |
| Maximum Operating Current | 10A (series connection) |
| Communication Interface | With communication interface (normally closed contact) |
| Testing Standard | GB18802.1 |
| Certification | Type Test Certification |
| Interface | |
| Connection Type | Plug-in installation |
| Operation Indicator | No |
| Power Supply | |
| Applicable Power Supply | AC 380V |
| Power System | Three-phase power system |
| Mechanical Characteristics | |
| Housing Material | Flame-retardant plastic |
| Dimensions (W×H×D) | 32.4×11.7×33 (mm) |
| Weight | 0.1kg |
| Installation Method | 35mm standard DIN rail mounting |
| Operating Environment | |
| Operating Temperature | -40℃ to +80℃ |
| Storage Temperature | -40℃ to +80℃ |
| Relative Humidity | 5 to 95% (non-condensing) |
| Protection Rating | IP20 |
| Altitude | ≤3000m |
Ordering and Model Selection（订货选型） | Product model | Product description |
|---|---|
| KDY-20B/385 | PCB-mounted Surge Protective Device (SPD), Rated voltage: Un=380V; Uc=385V; Imax=20kA (8/20μs), Up<1.5kV, Plug-in mounting。 |
| KDY-20B/510 | LED Street Light Surge Protective Device (SPD), Rated voltage: Un=500V; Uc=510V; Imax=20kA (8/20μs), Up<1.9kV, Plug-in mounting。 |
*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）
