The KPD48-4020 is Class III (Type 3) and 2 poles DC power Surge Protective Device (SPD) designed for low-voltage power system ligtning current&surge protection,capacity up to 40 kA (8/20). This DC power surge protector protect your 48V DC systems from lightning and electrical surges. Designed for telecom, data centers, and industrial applications, it delivers reliable, point-of-use protection for sensitive equipment like radios, PLCs, and power supplies. This compact SPD installs easily on DIN rail and features visual status indication and fail-safe thermal disconnection. Ideal for telecom cabinets, solar systems, and outdoor installations where surge risks are high.
48 VDC
Modular design
35 mm DIN rail mounting
Temperature control cut-out technology
Reliable thermo disconnect technology
Overcurrent protection
Instantaneous action and timely trip
High discharge capacity
Visual status indicator
Remote signal contacts
Space-saving and cost-effective
Ideal for telecom and industrial 48V DC systems
Telecommunications
Photovoltaic (PV) systems
Electronics
- Installation must be carried out under power-off conditions. Secure the surge protector 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 | KPD48-4020 |
Number of Positions | 2-pos. |
SPD Type per UL 1449 3rd Edition | Type 3 |
SPD Class per IEC 61643-11 | Class III |
Nominal Operating AC Voltage[Un] | 48 VDC (50/60 Hz) |
Max. Continuous Operating AC Voltage[Uc] | 85 VDC (50/60 Hz) |
Response time[tA] | ≤ 25 ns |
Nominal Discharge Current [In] | 20 kA (8/20 μs） |
Maximum Discharge Current [lmax] | 40 kA (8/20 μs） |
Voltage Protection Level [Up] | 250 V |
Degradation Failure Iindication | Red - failure,Green - Normal |
Remote Signal Contact | Optional |
| Mechanical | |
Connection Mode | Parallel |
Wiring diameter | 4-25 mm² |
Mounting Method | 35 mm DIN-rail |
Housing Material | Thermoplastic,Extinguishing Degree UL 94 V0 |
Environmental Ingress Protection Rating | IP20 |
Enclosure Color | Black |
Operating Temperature (℃) | -40 ℃ to +80 ℃ |
Dimensions (L×W×H) | 90 × 36 × 65 mm |
Weight | 175 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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