YBA1‑25B/4(1+2)
Product Introduction
Installation Location: Main distribution board of the building or power inlet where lightning current may enter.
Main Function: As Type1 Class I lightning protection unit, it mainYBA withstands direct lightning current impulse.
Key Parameter: The nominal lightning current waveform is 10/350 μs.
Application Site: Suitable for sites equipped with external lightning protection system and with risk of direct lightning current ingress.
| Parameter | Spec |
|---|---|
| Location of Use | Main Distribution Boards |
| Network Systems | TN-S |
| Mode of Protection | L-PE / L-N, N-PE / N-N-PE |
| Surge Ratings | Iimp = 25 kA (10/350μs); In = 25 kA (8/20μs) |
| IEC/EN Category | Class I+II / Type 1+2 |
| Protective Elements | High Energy MOV |
| Housing | Monoblock Design |
| Compliance | IEC 61643-11:2025; EN 61643-11:2025 |
Technical Data — IEC Electrical
| Parameter | Spec |
|---|---|
| Nominal AC Voltage (50/60Hz) (L-N) | 120V / 230V / 385V |
| Max. Continuous Operating Voltage (L-N) Uc | 150V / 275V / 385V |
| Max. Continuous Operating Voltage (N-PE) Uc | 255V |
| Nominal Discharge Current (L-N)/(N-PE) In | 25 kA / 100 kA |
| Max. Discharge Current (L-N)/(N-PE) Imax | 100 kA |
| Impulse Discharge Current (L-N)/(N-PE) Iimp | 25 kA / 100 kA |
| Total Discharge Current Itotal | 100 kA |
| Specific Energy (L-N)/(N-PE) W/R | 156 kJ/Ω / 2.5 MJ/Ω |
| Charge (L-N)/(N-PE) Q | 12.5 As / 50 As |
| Voltage Protection Level (L-N)/(N-PE) Up | 1000/1500V; 1500/1500V; 1600/1500V; 1800/1500V |
| Follow Current Interrupting Rating Ifi | 100 Arms |
| Response Time (L-N)/(N-PE) tA | < 25 ns / < 100 ns |
| Back-Up Fuse (max) | 315 A gL/gG |
| Short-Circuit Current Rating (L-N) IsccR | 50 kA |
| TOV Withstand 5s (L-N) UT | 180V / 335V / 335V |
| TOV Withstand 120min (L-N) UT | 230V / 440V / 440V |
| TOV Withstand 200ms (N-PE) UT | 1200V |
Internal Settings
Size and Packaging
Connection diagram
