IEC Electrical		75	150	275	320	385	440
Nominal AC Voltage (50/60Hz)	Uo/ Un	60V	120 V	230 V	230 V	230 V	400 V
Maximum Continuous Operating Voltage (AC)	Uc	75V	150 V	275 V	320 V	385 V	440 V
Nominal Discharge Current (8/20 μs)	In	20 kA	20 kA	20 kA	20 kA	10 kA	10 kA
Maximum Discharge Current (8/20 μs)	Imax	50 kA	50 kA	50 kA	50 kA	50 kA	50 kA
Impulse Discharge Current (10/350 μs)	Iimp	12.5 kA	12.5 kA	12.5 kA	12.5 kA	10 kA	10 kA
Specific Energy	W/R	39 kJ/Ω	39 kJ/Ω	39 kJ/Ω	39 kJ/Ω	25 kJ/Ω	25 kJ/Ω
Charge	Q	6.25 As	6.25 As	6.25 As	6.25 As	5 As	5 As
Voltage Protection Level	Up	0.7 kV	1 kV	1.5 kV	1.6 kV	1.8 kV	2 kV
Response Time	tA	< 25 ns
Back-Up Fuse (max)		315 A / 250 A gG
Short-Circuit Current Rating (AC)	lSCCR	25 kA / 50 kA
TOV Withstand 5s	UT	114 V	180V	335V	335V	335V	580V
TOV 120min	UT	114 V	230V	440V	440V	440V	765V
	mode	Withstand	Safe Fail	Safe Fail	Safe Fail	Safe Fail	Safe Fail
UL Electrical
Maximum Continuous Operating Voltage (AC)	MCOV	75 V	150 V	275 V	320 V	385 V	440 V
Voltage Protection Rating	VPR	300 V	600 V	900 V	1200 V	1350 V	1500 V
Nominal Discharge Current (8/20 μs)	In	20 kA	20 kA	20 kA	20 kA	20 kA	20 kA
Short-Circuit Current Rating (AC)	SCCR
		100 kA	200 kA	150 kA	150 kA	150 kA	200 kA
Mechanical & Environmental
Operating Temperature Range	Ta	-40ºF to +158ºF [-40ºC to +70ºC]
Permissible Operating Humidity	RH	5%...95%
Atmospheric pressure and altitude		80k Pa ... 106k Pa / -500 m.....2000 m
Terminal Screw Torque	Mmax	39.9 Ibf ·in [4.5 Nm]
Conductor Cross Section (max)		2 AWG (Solid, Stranded) / 4 AWG (Flexible)
		35 mm2  (Solid, Stranded) / 25 mm2  (Flexible)
Mounting
		35 mm DIN Rail, EN 60715
Degree of Protection		IP 20 (built-in)
Housing Material		Thermoplastic: Extinguishing Degree UL 94 V-0
Thermal Protection		Yes
Operating State / Fault Indication		Green ok / Red defect
Remote Contacts (RC) RC Switching Capacity RC Conductor Cross Section (max)		Optional AC: 250V / 0.5 A; DC: 250V / 0.1 A; 125 V / 0.2 A; 75 V / 0.5 A 16 AWG (Solid) / 1.5 mm2  (Solid)

LY1-B 12.5: Surge Protection, type 1+2 to EN 61643-11 with visual function display. For interface 0 to 2 (LPZ) in accordance with lightning protection zone concept to IEC 61312-1 . • Arresting capacity 12.5 kA (10/350 µs) per pole • Power consumption < 26 mW/pole • Protection level < 1.5 kV, allows device protection • Line follow current quenching 25 kA Ipeak • lncl. plug caps for labelling the connections • Encapsulated, non-extinguishing spark gap • Can be used in standard distributor housings