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CONVEX   @ CONCAVE

CRA24R (0402 4 Elements) CRA22R (0402 2 Elements) CRA28R  10P8R CRA24C (0402 4 Elements)
CRA34R (0603 4 Elements) CRA32R (0603 2 Elements)

     (0402 8 Elements )

CRA34C (0603 4 Elements)

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Derating Curve

Description Requirements Test Method JIS C5202
 DC Resistance

  J = +-5%, F = +-1% 

 Zero Ohm Jumper < 50mohm

  Item 5.1

 Short time Overload

  J: R <= ( 2%+ 0.1ohm )          

  F: R <= ( 1%+ 0.05ohm )

 Item 5.5

 2.5xRated voltage ( Max. Overload Voltage )

 for 5 sec.  Measure  resistance after 30

 minutes.

 Solderability

 Over 95% of termination

 must be covered with solder

  Item 6.5

  After immersion flux, dip in the 235o+-5oC

  molten solder bath for 2+-0.5 sec.

 Resistance to Solder Heat

  JR <= ( 1%+0.1ohm )          

  FR <= ( 0.5%+0.05ohm )      

  No mechanical damage

  Item 6.4

  With 260o+-5oC for 10+-1 sec.

 Temperature Coefficient of 

 Resistance (TCR)

  J: +-200ppm/oC                  

  F: +-50ppm/oC, +-100ppm/oC

 Item 5.2

 Test temperature: 25oC ~ -55oC

                              25oC ~ 125oC          

  TCR(ppm/oC)=  R2-R1    x      1      x 106

                                     R1           T1-T2            

    T1:25oC     T2: Test Temperature           

 R1=Resistance at reference temperatureT1

 R2=Resistance at test temperature T2

 Load Life Humidity

  J : R <=  ( 3%+0.1 ohm )

  F : R <= ( 1%+0.05 ohm )

 Item 7.9

 Maintain the temperature of the resistor at 40o

 +-2oC, and 90-95%RH with the rated voltage    

 applied.  Cycle ON for 1.5 hours and OFF for

 0.5 hour for 1000+48-0 hours. 

 After 1 hour, measure the resistance value.

 Temperature Cycle

  J: R <= ( 1%+0.1ohm )     

  F: R <= ( 0.5%+0.05ohm )

 Item 7.4

 Repeat 5 cycles as follows : -55oC(30minutes)

  , +25oC(10~15 minutes) +125oC(30minutes),

    +25oC(10~15 minutes)

 Load Life

  J: R <= ( 3%+0.1ohm )  

  F: R <= ( 1%+0.05ohm )

  Item 7.10

Permanent resistance change after 1000 +48,

 - 0hours(1.5 hours ON, 0.5 hour OFF at RCWV

 or Max. keep the resistor at  70+-3oC ambient

 temperature.

 Terminal Strength

  R <= ( 1%+0.1ohm )   

  No mechanical damage

 Item 6.1

 500g for 10 seconds.

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