Desctription	Symbol	Unit	Parameters & Models
Rated operational voltage	Uc	V	275	320	385	440
Nominal discharge current	In	kA	5	5	5	5
Maximum discharge current	Imax	kA	10	10	10	10
Voltage protection level	Up	Kv	0.8	1.0	1.2	1.5
Protection degree	IP		20	20	20	20
Response time		ns	25	25	25	25
Fuse		A	10	10	10	10
Material			PA6	PA6	PA6	PA6
Fire retardent (comply with)			UL94V-0	UL94V-1	UL94V-2	UL94V-3
Standards			IEC61643-1:1998
Single Phase Model	L/N		BY1-D/1-275	BY1-D/1-320	BY1-D/1-385	BY1-D/1-440
	L,N		BY1-D/2-275	BY1-D/2-320	BY1-D/2-385	BY1-D/2-440
	L/N+NPE		BY1-D/1+1-275	BY1-D/1+1-320	BY1-D/1+1-385	BY1-D/1+1-440
Three phase Model	L1,L2,L3		BY1-D/3-275	BY1-D/3-320	BY1-D/3-385	BY1-D/3-440
	L1,L2,L3,N		BY1-D/4-275	BY1-D/4-320	BY1-D/4-385	BY1-D/4-440
	L1,L2,L3,N+NPE		BY1-D/3+1-275	BY1-D/3+1-320	BY1-D/3+1-385	BY1-D/3+1-440
Local indication: Green indicates normal state and red indicates failure.

BY1-D surge protection device