Eaton's PolyTron™ PTC device selection guide

1 PTC resettable devices Eaton's polytron PTC device selection guide Selecting Polymer Positive Once the fault is removed or Features: Temperature Coefficient the ambient temperature (PTC) devices for overcurrent Fast trip times and cools, the PTC will and overtemperature resettable protection automatically reset and protection Overcurrent and over conduct safe current levels temperature protection Eaton's Bussmann Series again, allowing current to flow Wide range of current family of polytron PTC through the circuit. (Ihold) and voltage devices is ideally suited for PTCs are commonly used in (Vmax) offerings protecting applications sensitive to high ambient operating applications where constant Low resistance temperatures or subject to uptime is required and/or in RoHS compliant, lead- frequent overcurrent conditions. circuits not easily accessible free, halogen-free by a user or service PTCs operate as a positive Applications technician. temperature coefficient device .

2 Medical equipment High temperatures and Available in surface mount Industrial power and excessive current will cause the and radial packages, Eaton's device resistance to increase transmission Bussmann series polytron until it limits the unsafe current White goods PTC devices help improve the level. Telecommunications and safety and reliability of networking Upon reaching the design customer equipment Computer and temperature/current limit, the worldwide. peripherals PTC will effectively open the polytron PTC device Consumer and circuit to provide protection from packages automotive electronics the overcurrent or elevated ambient temperature condition. Battery and rechargeable Radial: 16, 30 and 60. devices Vdc from to 15. amps Agency information Surface Mount: 1206 cULus UL Recognition and 1812 - 6-60 Vdc for US and Canada from to amps T V European Standard (Germany Agency). HV. +17%. Introduction polytron HB PTC device Family Surface Mount Radial Leaded This is a general selection guide .

3 PTS1206 PTS1812 PTR016V PTR030V PTR060V. Total Stored Energy (60 F comparison). Its intent is to provide an understanding of the package styles and ratings most suited for an application. For final selection , please consult your local Eaton TV TV. representative or website for Specifications +44%. additional details. +78%. Chip Size HV 1206 1812 -- -- -- Eaton Bussmann Series HV. Hold Current (Ihold) A A A A A. polytron PTC devices are Max Voltage (Vmax) +17% 6-60 V 6-60 V 16 V 30 V +29%60 V. ideally suited for applications encountering frequent Max Fault Current HB (Imax) 100 A 10-100 AHB 40-100 A 40-100 A 40 A. overcurrent conditions for which Operating Temperature Range - C -40/+85 -40/+85 -40/+85 -40/+85 -40/+85. traditional fuse protection would Applications Application Areas Total Stored Energy (60 F comparison) Usable Energy ( V derating, 60 F comparison). prove impractical or undesirable CPU X. such as consumer electronics, I/ USB X X X.

4 O ports, medical equipment and IEEE 1284 Parallel data bus X X X. process control applications IEEE X. where constant uptime is Computers IEEE 1394 X X. required. I/O Ports X X X. polytron PTC device selection PC Card X X X. SCSI X X X. 1) Determine circuit Video port X X X. parameters: LCD Monitor X X X. a. Normal operating Set top box X X. current Ihold Loudspeaker X. b. Maximum circuit voltage Vmax Smart card reader X. c. Ambient operating Consumer Mobile phone X. temperature C Electronics Linear AC/DC adapter X X X X. TV TV Portable electronic input port d. Maximum fault X X. current Imax +78% Electromagnetic loads, motors X X. +177%. Solenoid protection X X X. HV 2) Select package (radial lead or SMD Chip) based on Medical HV. +29% Voltage/current input terminals X X. size constraints and PCB Electronics +62%. HB assembly method. HB. 3) Compare polytron PTC 5) Check that the trip time will deviceUsable data Energy sheet( ratings for adequately protect the V derating, 60 F comparison).

5 Vmax and Imax at circuit. Peak Power (60 F comparison). 6) Verify that the post trip The circuit parameters should resistance (R1max) of the not exceed the ratings of the device is taken into TV. device . account. 4) Verify that the ambient+177% 7) Test and evaluate the operating HV temperature of the suitability and performance circuit is within the device 's of the chosen polytron PTC. +62%. normal operating range. device in the actual Thermally HB derate Ihold and Imax application. as necessary using the equation: Peak Ihold(60. = FImax/. comparison) Technical Application Assistance Thermal derating factor Call 636-527-1270. E-mail Data Sheets: Order samples on-line: https://. Eaton Electronics Division For more information visit: 1000 Eaton Boulevard Cleveland, OH 44122. United States 2017 Eaton All Rights Reserved Eaton is a registered trademark. Printed in USA. Publication No. 4066 All other trademarks are property December 2017 of their respective owners.