250R145 Series

PTC 60V/250V POLYFUSE TELECOM .145A

Catalog

PTC 60V/250V POLYFUSE TELECOM .145A

Part	Height - Seated (Max)	Current - Max	Size / Dimension Width	Size / Dimension Length	Resistance - Post Trip (R1) (Max)	Lead Spacing	Type	Time to Trip	Resistance - Initial (Ri) (Min)	Package / Case	Operating Temperature (Min)	Operating Temperature (Max)	Current - Trip (It)	Mounting Type	Voltage - Max	Voltage - Max (Int)	Current - Hold (Ih) (Max)	Approval Agency
LITTELFUSE 250R145ZR	0.433 in	3 A	0.181 in	0.256 in	14 Ohms	0.201 in	Polymeric	2.5 s	3 Ohms	Disc Radial	-40 °C	85 °C	290 mA	Through Hole	60 Vpk	250 V	145 mA
LITTELFUSE 250R145U	0.433 in	3 A	0.181 in	0.256 in	14 Ohms	0.201 in	Polymeric	2.5 s	3 Ohms	Disc Radial	-40 °C	85 °C	290 mA	Through Hole	60 Vpk	250 V	145 mA	cURus TUV

Catalog

PTC 60V/250V POLYFUSE TELECOM .145A

Description

The 250R Series is designed to protect against short duration high voltage fault currents (power cross or power induction surge) typically found in telecom applications (250Vrms). The series can be used to help telecom networking equipment meet the protection requirements specified in ITU K.20 and K.21.