Pronto Energy 
KNY2-10 AC Surge Protective Device (SPD)
The KNY2-10 4P AC surge protective device diverts transient overvoltages to earth, protecting connected equipment from lightning-induced and switching surges. As a T1+T2 surge protective device compliant with IEC 61643-11, it provides reliable surge protection for distribution boards and sensitive electronics.
Applications & circuit protection
The KNY2-10 AC SPD protects distribution boards, switchgear and sensitive equipment from voltage transients. It is widely specified for commercial buildings, industrial plants and OEM equipment.
- Main and sub-distribution boards
- Commercial building electrical systems
- Industrial control and automation equipment
- Sensitive electronics and data systems
Construction & operating reliability
The KNY2-10 uses high-energy MOV elements with a thermal disconnector, delivering fast response and reliable clamping performance with a compact DIN-rail housing.
- High-energy metal oxide varistor (MOV)
- Thermal disconnector with status indication
- Fast response for transient suppression
- 35mm DIN rail mounting
Wiring Diagram
Technical Parameter
| Parameter | Value |
| Compliant with standards | GB/T 18802.11-2020; IEC 61643-11:2011; EN 61643-11:2012 |
| SPD classification | T1+T2 |
| Application | AC power distribution systems; protection against induced-lightning and switching surges |
| Network systems | TN-S, TN-C, TT |
| Number of product poles | 4P |
| Maximum continuous operating voltage Uc | 275 / 320 / 385 V AC |
| Rated voltage Un | 220 V AC |
| Nominal discharge current In | 20 kA |
| Maximum discharge current Imax | 50 kA |
| Impulse discharge current Iimp | 12.5 kA |
| Voltage protection level Up (L-N) | 1.5 kV (Uc 275/320 V); 1.8 kV (Uc 385 V) |
| Voltage protection level Up (N-PE) | 1.2 kV |
| Response time | 25 ns |
| Admissible short-circuit current Isccr | 25,000 A |
| Protection modes | L-PE / N-PE / L-N |
| Protective element | High-energy MOV |
| Remote signalling | Optional; NO/NC contact, 220 V / 0.5 A |
| Terminal capacity | 4-16 mm² |
| Recommended cable cross-section | >10 mm² |
| Installation method | 35 mm DIN rail (EN 60715) |
| Protection level | IP20 |
| Housing material | PBT / PA |
| Flame-retardant grade | UL94 V-0 |
| Operating temperature | -40°C to +70°C |
| Operating relative humidity | 5%-95% |
| Certifications | CB, CE |
Standards & certifications
The KNY2-10 is designed in accordance with GB/T 18802.11-2020; IEC 61643-11:2011; EN 61643-11:2012 and is available with CB, CE certifications. Certification documentation can be provided according to project and destination-market requirements.
- Standard: GB/T 18802.11-2020; IEC 61643-11:2011; EN 61643-11:2012.
- Certifications: CB, CE.
- Protection level: IP20 (where applicable).
OEM & B2B supply support
KORLEN supports distributors, OEM manufacturers, electrical contractors and project buyers with product selection, samples, technical documentation and commercial quotations.
If the KNY2-10 configuration does not match your project, send us the required specifications, quantity and destination market. Our team can help identify a suitable configuration.
- Samples available for product evaluation.
- Flexible quantities for project and B2B purchasing.
- OEM and ODM support for suitable projects.
- Technical documentation and certification support available.
Frequently Asked Questions
The KNY2-10 surge protective device protects electrical installations and equipment from transient overvoltages caused by lightning and switching events.
The KNY2-10 provides 50kA discharge capacity, selected according to the exposure level of the installation.
It is connected in parallel with the protected circuit on 35mm DIN rail, as close as possible to the equipment being protected.
The KNY2-10 complies with IEC 61643-11 and GB/T 18802.11 for surge protective devices.
