Protect your critical electrical infrastructure with our KPB385-80 Series Class II/Type 2 Surge Protection Device – a high-performance solution designed for reliable overvoltage protection in low-voltage AC power networks.
Engineered to meet the demands of modern power systems, this SPD handles massive surge currents up to 80 kA (8/20 μs) while maintaining a low protection level of ≤ 1800 V, ensuring sensitive equipment stays safe from voltage transients caused by lightning-induced surges or power switching events.
Featuring a compact modular design, the KPB385-80 includes integrated thermal and overcurrent disconnection, enabling safe, maintenance-free operation. With an ultra-fast 25 ns response time, it instantly clamps dangerous spikes, minimizing the risk of equipment failure, data loss, or service interruption.
Perfectly suited for 230 V single-phase and 400 V three-phase AC installations, the KPB385-80 is the ideal choice for secondary (Stage 2) surge protection in main and sub-distribution boards. It works seamlessly with Type 1 SPDs at the service entrance to create a coordinated, multi-stage lightning protection system.
230V single-phase and 400V three-phase systems
Type 2 / Class II SPD for AC power systems
80kA maximum discharge current (8/20μs)
Modular design with overcurrent protection
Instantaneous action and timely trip
Clear Visual Fault Indication (Green/Red Window)
Optional Remote Alarm Contacts (NO/NC)
35mm DIN rail mounting
Optimized Design for Space & Cost Efficiency
Industrial control
Commercial buildings infrastructure
Renewable energy
Residential Electrical Distribution
- Installation must be carried out under power-off conditions. Secure the surge protector KPB385-80 and circuit breaker to the rail respectively, and connect L, N, PE, etc. as shown in the diagram.
- Regularly check the working status of the surge protector. Replace the product immediately if it fails or is damaged.
| Electrical | ||
Model | KPB385-8020 | KPB385-8011 |
Number of Positions | 2-pos. | 2-pos. |
SPD Type per UL 1449 3rd Edition | Type 2 | Type 2 |
SPD Class per IEC 61643-11 | Class II | Class II |
Nominal Operating AC Voltage[Un] | 100-240 V (50/60 Hz) | 100-240 V (50/60 Hz) |
Max. Continuous Operating AC Voltage[Uc] | 385 V (50/60 Hz) | 385 V (50/60 Hz) |
Response time[tA] | ≤ 25 ns | ≤ 25 ns |
Nominal Discharge Current [In] | 40 kA (8/20 μs) | 40 kA (8/20 μs) |
Maximum Discharge Current [lmax] | 80 kA (8/20 μs) | 80 kA (8/20 μs) |
Protection Mode | L/N-G | L/N, N-G |
Voltage Protection Level [Up] | 1800 V | 1800 V |
Degradation Failure Iindication | Red - failure,Green - Normal | Red - failure,Green - Normal |
Remote Signal Contact | Optional | Optional |
Model | KPB385-8040 | KPB385-8031 |
Number of Positions | 4-pos. | 4-pos. |
SPD Type per UL 1449 3rd Edition | Type 2 | Type 2 |
SPD Class per IEC 61643-11 | Class II | Class II |
Nominal Operating AC Voltage[Un] | 208-415 V (50/60 Hz) | 208-415 V (50/60 Hz) |
Max. Continuous Operating AC Voltage[Uc] | 385 V (50/60 Hz) | 385 V (50/60 Hz) |
Response time[tA] | ≤ 25 ns | ≤ 25 ns |
Nominal Discharge Current [In] | 40 kA (8/20 μs) | 40 kA (8/20 μs) |
Maximum Discharge Current [lmax] | 80 kA (8/20 μs) | 80 kA (8/20 μs) |
Protection Mode | L1/l2/L3/N-G | L1/l2/L3/N-G |
Voltage Protection Level [Up] | 1800 V | 1800 V |
Degradation Failure Iindication | Red - failure,Green - Normal | Red - failure,Green - Normal |
Remote Signal Contact | Optional | Optional |
| Mechanical | ||
Connection Mode | Parallel | |
Wiring diameter | 4-25 mm² | |
Mounting Method | 35mm DIN-rail | |
Housing Material | Thermoplastic,Extinguishing Degree UL94 V 0 | |
Environmental Ingress Protection Rating | IP20 | |
Enclosure Color | Black | |
Operating Temperature (℃) | -40 ℃ to +80 ℃ | |
Dimensions (L×W×H) | 1-Phase: 90 × 72 × 65 mm 3-Phase: 90 × 144 × 65 mm | |
Weight | 1-Phase: 350 g 3-Phase: 700 g | |
| Standards Compliance&Certifications | ||
Standards | UL 1449 3rd Edition: 2011, IEC 61643-11: 2011, EN 61643-11:2012, IEEE C62.11: 2005, IEEE C62.41: 2002, IEEE C62.45: 2002, NEMA LS-1 | |
| Certifications | CE | |
English 
