SFRX Polymer PTC Thermistor SFRX ROHS

Transcription

1 Polymer PTC Thermistor ROHS Features Radial leaded devices;;; Quick trip time Low parasitic capacitance, flat impedance with frequency. RoHS compliant. Resettable. Design for lead free solder termination. Increased reliability. Applications Power supply Alarm system Speaker Motors and other general electronics Rps R L AC input Power supply + DC _ power bus Sensors Battery Rps R L Modem circuit device Siren or bell Additional sensor module Keyboard Screen Rps R L Extra sensor Typical Loudspeakers Application Typical Fire Alarm System Application Polymer PTC Thermistor 1

2 Polymer PTC Thermistor ROHS Basic reference data PARAMETER VALUE UNIT Maximum voltage (RMS) 60~75 V Temperature range -5 to +85 C Electrical Characteristics Part Number I H I T V max I max T trip Pd typ R min R max (A) (A) (V) (A) (s) (W) (Ω) (Ω) Note: I H =Hold current: maximum current at which the device will not trip at 25 still air. I T =Trip current: minimum current at which the device will always trip at 25 still air. V max =Maximum voltage device can withstand without damage at rated current. I max =Maximum fault current device can withstand without damage at rated voltage. T trip =Maximum time to trip(s) at assigned current. Pd typ =Typical power dissipation: typical amount of power dissipated by the device when in state air environment. R min =Minimum device resistance at 25 prior to tripping. R max =Maximum device resistance at 25 prior to tripping. Polymer PTC Thermistor 2

3 Polymer PTC Thermistor ROHS Typical Time-to-Trip Curves at 25 A = 010 B = 017 C = 020 D = 025 E = 030 F = 040 G = 050 H = 065 I = 075 J = 090 K = 110 L = 135 M = 160 N = 185 O = 250 P = 300 Q = 375 Thermal Derating [ Hold Current (A) at Ambient Temperature ( )] Part Number Maximum Ambient Operating Temperature ( ) Polymer PTC Thermistor 3

4 Polymer PTC Thermistor ROHS Reliability Characteristics No. ITEM CONDITION OF TEST ACCEPTANCE 1 Resistance In still 25 R min R R max 2 Time to Trip Specified current, V max, 25 T maximum Time to Trip 3 Hold Current 60min, at I H No trip 4 Trip Cycle Life V max, I max, 20 cycles No arcing or burning 5 Trip Endurance V max, 15min No arcing or burning Environmental Specifications No. ITEM CONDITION OF TEST 1 Vibration Test The chip ( Mounted on board ) is vibrated in the frequency range of 10~50~10Hz and in the constant vibration amplitude of 1.5mm. This motion is applied for the period of 2 hours in each of 3 perpendicular directions (X-Y-Z axis). 2 Dropping Test The chip is mounted on board, and dropped n the wooden board from 75cm. 3 Dry Temperature Ta=85, 1000hours 4 Low-temperature Ta=-5, 1000hours 5 Thermal Shock -5 30min, 85 30min, 5 cycles 6 Resistance to Soldering heat 260±10,10second 7 Damp-heat Steady-state Test Ta=85, RH=85%, 1000hours 8 Solvent resistance Test IPA, 2min, 25 Polymer PTC Thermistor 4

5 Polymer PTC Thermistor ROHS Product Demension (mm) Part Number A B C D E F Lead Max Max Typ. Min Max Typ. Style Size(Φ) Recommended PAD Hole A B Unit mm Polymer PTC Thermistor 5

6 Polymer PTC Thermistor ROHS Wave Solder Recommendation Recommended wave soldering methods. Devices can be cleaned using standard industry methods and solvents. If a device is removed from the board, it should be discarded and replaced with a new device. Leaded devices are not designed to be compatible with reflow soldering manufacturing operations. Lead free wave soldering curve. NOTE If wave solder temperatures exceed recommended profile, devices may not meet the performance requirements, If the wave soldering curve can not satisfy your product, please contact SEMITEL. Storage The production should be in the environment of good ventilation. The indoor temperature is -40 ~+55,and the relative humidity 85% (at 25 ),without acid, alkali and other harmful impurity. Contact information SEMITEL INTERNATIONAL LIMITED 14H, Universal Industrial Building, Shan Mei Street, Fotan, Shatin, Hong Kong Tel: Fax: info@semiteltech.com Rev. letter B Date 2010/3/1 Design Check Audit Approve ann martin fred fred Polymer PTC Thermistor 6