The KPB385-60 series is a Type 3/Class III Surge Protection Device (SPD) engineered for final-stage protection in low-voltage AC power systems. With a maximum discharge current of 60 kA (8/20 μs), this SPD delivers targeted defense against residual voltage surges that may pass through upstream protection stages.
Featuring a compact modular design, it responds in 25 ns to suppress transient overvoltages, preventing equipment damage, data loss, and potential fire hazards. The KPB385-60 is perfectly suited for third-level (Stage 3) surge protection in single-phase and three-phase power systems. It is commonly installed close to sensitive end equipment.
By installing our surge protective device KPB385-60 at the load side of distribution panels or sub-circuits, you enhance the safety, reliability, and operational continuity of your electrical system—especially in environments where even minor surges can cause critical disruptions.
Ideal for single-phase & three-phase systems
Type 3 / Class III SPD for final-stage surge protection
60 kA (8/20 μs) discharge capacity
Ultra-fast response to eliminate residual transients
Modular design with overcurrent and thermal protection
Visual status indicator for easy maintenance (optional)
35mm DIN rail mounting for quick installation
Prevents equipment failure, fire risks, and service downtime
Space-saving and cost-effective
Telecommunications
Power supply system
Infrastructure
Data centers
- Installation must be carried out under power-off conditions. Secure the surge protector KPB385-60 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 | KPB385-6020 | KPB385-6011 |
Number of Positions | 2-pos. | 2-pos. |
SPD Type per UL 1449 3rd Edition | Type 3 | Type 3 |
SPD Class per IEC 61643-11 | Class III | Class III |
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] | 30 kA (8/20 μs) | 30 kA (8/20 μs) |
Maximum Discharge Current [lmax] | 60 kA (8/20 μs) | 60 kA (8/20 μs) |
Protection Mode | L/N-G | L/N, N-G |
Voltage Protection Level [Up] | 1500 V | 1500 V |
Degradation Failure Iindication | Red - failure,Green - Normal | Red - failure,Green - Normal |
Remote Signal Contact | Optional | Optional |
Model | KPB385-6040 | KPB385-6031 |
Number of Positions | 4-pos. | 4-pos. |
SPD Type per UL 1449 3rd Edition | Type 3 | Type 3 |
SPD Class per IEC 61643-11 | Class III | Class III |
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] | 30 kA (8/20 μs) | 30 kA (8/20 μs) |
Maximum Discharge Current [lmax] | 60 kA (8/20 μs) | 60 kA (8/20 μs) |
Protection Mode | L1/l2/L3/N-G | L1/l2/L3/N-G |
Voltage Protection Level [Up] | 1500 V | 1500 V |
Degradation Failure Iindication | Red - failure,Green - Normal | Red - failure,Green - Normal |
Remote Signal Contact | Optional | Optional |
| Mechanical | ||
Connection Mode | Parallel | |
Wiring diameter | 4-25mm² | |
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 × 36 × 65 mm 3-Phase: 90 × 72 × 65 mm | |
Weight | 1-Phase: 175 g 3-Phase: 350 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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