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Jk250-120U pptc resettable fuse is a kind of overcurrent protection unit which specially designed and manufactured for the communication exchanger and distributing frame. Has passed the repeated selective examination by the product protectionTesting Centre of the Ministry of Information Industry (the former Ministry of Posts and Telecommunications) and the Bureau of Technical Supervision, this series’ product performance completely conform to the standards of the telecommunications and posts industry.
Electrical Characteristics :
Max.interrupt Current | 10.0 A RMS | Max.interrupt Voltage | 250 VRMS |
Max.Operating Current | 3.0 AAC | Max.Operating Voltage | 60 VDC |
Hold Current at 25°C±2oC | 110m A | Trip Current at 25°C±2oC | 220mA |
Initial Resistance | 6~12ohms | Max.Post Trip Resistance | 16ohms |
Physical Description for Dimensions:
A:7.0mm(Max)
B:12mm(Max)
C:4.5mm(Max)
D:5.1mm(Typ)
Terminal Material:Tin plated copper,Φ0.60mm
Insulating Material:Cured,flame-retardant epoxy,meets UL94V-0 requirements
Test Conditions and Accept/Reject Criteria:
Test | Test Conditions | Accept/Reject Criteria |
Initial Resistance | In still air at 25°C±2oC | 6~12ohms |
Hold Current | 25°C±2oC,80mA, 60min | No trip |
Time to Trip | 25°C±2oC, at 1.0A | ≤1.2S |
Trip Endurance | 250V,20A, 15min | No arcing or burning |
High A.C Trip Endurance | 3A,250V, 20 circles | ζ≤30% |
Storage Temperature: -40°C to 85°C
Bulk:1000pcs per bag or packing in tape