The KPB385-100 series is a Type 2/Class II Surge Protection Device (SPD) specifically engineered for low-voltage AC power systems. With a maximum discharge current of 100 kA (8/20 μs) and a low voltage protection level of ≤ 1800 V, this SPD delivers robust protection against transient overvoltages caused by lightning strikes and switching surges.
Designed with a modular structure, the KPB385-100 integrates built-in overcurrent protection and responds in just 25 ns to rapidly absorb and divert dangerous surge energy, safeguarding your electrical equipment from permanent damage or operational downtime.
Ideal for single-phase 230 V and three-phase 400V AC power systems, this Type 2 SPD is perfectly suited for secondary (Stage 2) lightning protection in commercial, industrial, and residential installations.Installed as Stage 2 protection downstream of the main service panel, Type 2/Class II surge protector ensures seamless integration with Type 1 SPDs (for primary protection) to form a complete, multi-level surge protection solution. It significantly enhances the safety, reliability, and stability of your power distribution network.
230V single-phase and 400V three-phase systems
Type 2 / Class II SPD for AC power systems
100kA maximum discharge current (8/20μs)
Modular design with overcurrent protection
Instantaneous action and timely trip
Visual status indicator
Remote signal contacts
35mm DIN rail mounting
Space-saving and cost-effective
Commercial Buildings
Industrial Facilities
Infrastructure & Public Utilities
Building management systems
Data Centers & Telecommunication Rooms
Solar PV combiner boxes or inverter AC side
- Installation must be carried out under power-off conditions. Secure the surge protector KPB385-100 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 | KPB385-10020 | KPB385-10011 |
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] | 50 kA (8/20 μs) | 50 kA (8/20 μs) |
Maximum Discharge Current [lmax] | 100 kA (8/20 μs) | 100 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 | KPB385-10040 | KPB385-10031 |
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] | 50 kA (8/20 μs) | 50 kA (8/20 μs) |
Maximum Discharge Current [lmax] | 100 kA (8/20 μs) | 100 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 | |
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