THOR TRS-A12 4p 12.5kA Type 1 AC surge protection device

THOR TRS-A12 3p 12.5kA Type 1 AC surge protection device

THOR TRS-A12 2p 12.5kA Type 1 AC surge protection device

THOR TRS-A12 1p 12.5kA Type 1 AC surge protection device

TRS-A15-1

TRS-A12 12.5kA Type 1 AC Surge Protective Device

Main Features

Lightning impulse current (10/350 μs) Iimp: 12.5kA
Network Systems: TN-S, TT, TN-C-S
Mode of Protection: L-PE, N-PE
IEC/EN Category: Class I / Type 1
Protective Elements: Graphite gap
Housing: Monobloc design
Application: Main Distribution Board
Compliance: EN 61643-11:2012, IEC 61643-11:2011/T1

The TRS-A Series is a Type 1 AC Surge Protective Device designed for service-entrance and main distribution boards. Using graphite-gap discharge technology, it provides high-energy lightning current handling capability and reliable protection against direct lightning strikes and severe transient overvoltages.

With a robust discharge structure, fast response, and stable performance, the TRS-A Series is suitable for residential, commercial, and industrial low-voltage power systems located in lightning-prone or surge-intensive environments.

The TRS-A12 is the entry-level model of the TRS-A Type 1 SPD series, offering 12.5 kA (10/350 μs) impulse current capability. It is designed for lightning protection systems with moderate exposure levels and provides reliable discharge performance for basic service-entrance protection.

With its graphite-gap discharge structure, the device efficiently handles direct lightning current while maintaining a low voltage protection level. It is well-suited for smaller buildings, residential distribution boards, and facilities where lightning density is relatively low to medium.

Applications

Residential buildings without external LPS
Basic incoming power protection
Low-to-medium lightning risk areas
Small commercial distribution boards

Model	TRS-A12	TRS-A15	TRS-A25	TRS-A50
Nominal volatge(U_n)	230 V AC
Maximum operating voltage(U_c)	275 V AC
Lightning impulse current (10/350 μs)(I_imp)	12.5 kA	15 kA	25 kA	50 kA
Voltage protection level(U_p)	≤ 2,0 kV	≤ 2,0 kV	≤ 2,2 kV	≤ 2,5 kV
Insulation resistance group	> 100 mΩ
Response time	<100ns
Cross-section of connected conductors solid (min/max)	16 mm² / 35 mm²
Cross-section of connected conductors stranded (min/max)	16 mm² / 35 mm²
Fault indication	—
Degree of protection	IP20
Range of operating temperatures (min/max)	-40℃~+85℃
Humidity range	5%~95%
Mounting	DIN rail 35 mm
According to standard	EN 61643-11:2012, IEC 61643-11:2011 / T1
Remarks	Other Uc can be customized.(420V AC, 385V AC, 320V AC, etc.)

Rotate the 3D model to inspect the surge protective device from different angles. For detailed technical specifications, electrical ratings and installation information, please refer to the other tabs.