Product Details

BY5-120 SPD

BY5-120 AC Surge Protector is designed according to IEC lightning protection requirements, combined with the application environment of AC power supply systems. It uses high-energy MOV chips with nanosecond response speed. It provides a reliable voltage protection level, super strong surge current discharge capability, and safe overload characteristics, offering reliable functions for lightning protection, surge protection, power grid purification, and safety.

Application Scope
It is mainly used for lightning protection of various distribution boxes and other electrical equipment in AC power supply systems.

Performance Features
· Designed for voltage limiting, complying with Type 1 test requirements.
· Multiple combination modes to achieve differential mode and common mode protection functions.
· High-energy MOV with low residual voltage and high voltage protection level.
· The disconnector has an arc-quenching device and strong overload capability.
· High continuous working voltage and large current-carrying capacity.
· Fast response speed without continued flow.
· Rail-mounted installation.
· Enhanced nylon casing with IP20 protection level.
· Small and compact size, easy to install and use.

Model No.:	BY5-120/3-275 BY5-120/4-275	BY5-120/3-320 BY5-120/4-320	BY5-120/3-385 BY5-120/4-385	BY5-120/3-420 BY5-120/4-420	BY5-120/3-550 BY5-120/4-550
Rated operational voltage Uopv(V)	220～690	220～690	220～690	220～690	220～690
Maximum continuous operating voltage Ucpv(V)	275	320	385	420	550
Quantity of electric charge Q(As)	6.25	6.25	6.25	6.25	6.25
Nominal discharge current In (kA)	60(8/20μs)	60(8/20μs)	60(8/20μs)	60(8/20μs)	60(8/20μs)
Maximum discharge current Imax (kA)	120(8/20μs)	120(8/20μs)	120(8/20μs)	120(8/20μs)	120(8/20μs)
The impact of discharge current Iimp（kA）	12.5(10/350μs)	12.5(10/350μs)	12.5(10/350μs)	12.5(10/350μs)	12.5(10/350μs)
Voltage protection level Up(kV)	1.8	2	2.5	3	3.5
Capcity of connection	4～35mm²	4～35mm²	4～35mm²	4～35mm²	4～35mm²
Protection of degree	IP20	IP20	IP20	IP20	IP20
Material	PA66	PA66	PA66	PA66	PA66
Flame retardant grade (comply with)	UL94V-0	UL94V-0	UL94V-0	UL94V-0	UL94V-0
Local indication: Green indicates normal state and red indicates failure.

Technical Parameters

Model	BY5-120
Nominal operating voltage Uo (V)	230/400 400/690
Nominal Continuous Operating Voltage Uc (V)	385 420 550 690
Nominal Discharge Current In (kA)	60
Maximum Discharge Current Imax (kA)	120
Impulse Current Iimp (kA)	12.5
Charge Quantity Q (As)	6.25
Voltage Protection Level Up (kV)	2.5 3.0 3.5 3.8
Rated Short Circuit Current Isc (A)	1000
Local Failure Indication	Green window: Normal Red window: Failure
Fault Alarm Contact	1NO 1NC
Response Time	≤ 25 ns
Insulation Resistance	> 50 MQ
Wiring Capacity	4～35 mm²
Flame Retardant Rating of the Casing	UL94V-0
Casing Protection Level	IP20
Combination Mode	3 0,4 0,3 1
Installation Method	DIN:35mm
Operating Temperature	-40℃~70℃
Operating Humidity	5%RH～95RH
Altitude	<2000 m