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Flame-Proof Type Metal Film Resistors - FMF Series Print
Resistor Series - Resistor Series
Written by FMF Series   
Tuesday, 10 June 2008 22:14

   Flame-Proof Type Metal Film Resistors - FMF Series

METAL FILM RESISTORS - FLAME-PROOF TYPE FMF Series

     
              
TYPEPOWER FEATURES    
FMF-251/4W, Power Rating: 0.25W, 0.5W, 1W, 2W.    
FMF-501/2W Resistance Tolerance: ±1%, ±5%.    
FMF-1001W T.C.R.: ±50ppm/ ℃ , ±100ppm/ ℃.    
FMF-2002W Complete flameproof construction-UL Approval    
   Value range: 1Ω ~ 1MΩ    
              
INTRODUCTION           
              
The FMF series flame-proof type Metal Film Resistors are manufactured by vacuum deposit metal film on high thermal conductivity ceramic rods, and are coated with layers of gray color flame-proof lacquer.These FMF flame-proof metal film resistor is designed to replace the metal oxide resistors and low power wire wound resistors, where when flame-prood and small size is needed.  
  
  
              
DIMENSIONS:           
              

STYLE

DIMENSION (mm)

POWER RATING

 

 

 

L

ΦD

H

Φd

(Watt)

 

 

 

FMF-25

6.3±0.5

2.3±0.3

28±2

0.6±0.05

1/4W

 

 

 

FMF-50

9.0±0.5

3.2±0.5

26±2

0.6±0.05

1/2W

 

 

 

FMF-100

11.5±1.0

4.5±0.5

35±2

0.8±0.05

1W

 

 

 

FMF-200

15.5±1.0

5.0±0.5

33±2

0.8±0.05

2W

   
              
ELECTRICAL CHARACTERISTICS:        
              
StyleFMF-25FMF-50FMF-100FMF-200       
Power Rating 70oC1/4W1/2W1W2W       
Operating Temp. Range-55oC ~ +155oC       
Max. Working Voltage250V350V500V500V       
Max. Overload Voltage500V700V1000V1000V       
Dielectric Withstanding Voltage (AC)500V700V1000V1000V       
Max. Intermittence Overload Voltage300V500V1000V1000V       
Value Range  ±1%, ±5%10Ω ~1MΩ       
Temp. Coefficient (by Type)±50ppm, ±100ppm.       
* The listed resistance range for standard resistance, below or over this resistance is on request.     
              
ENVIRONMENTAL CHARACTERISTICS :        
              
PERFORMANCE TESTTEST METHODAPPRAISE  
Short Time OverloadJIS-C-5202 5.5 : 2.5 times RCWV for 5 seconds±(0.75%+0.05)Ω  
Dielectric Withstanding V.JIS-C-5202 5.7 : in V-Block for 60 secondsBy Type  
Temperature CoefficientJIS-C-5202 5.2 : -55oC ~+155oCBy Type  
Insulation ResistanceJIS-C-5202 5.6 : in V-Block≧1000 MΩ  
SolderabilityJIS-C-5202 6.5 : 230oC for 5±0.5 seconds95% min. coverage  
Resistance to SolventJIS-C-5202 6.9 : Trichroethance for 1 min. with ultrasonicno deterioration  
Terminal StrengthDirect load for 10 sec. In the direction of the terminal leads≧2.5KG/24.5N  
Pulse OverloadJIS-C-5202 5.8 : 4 time RCWV 10000 cycles(1 sec.on, 25 sec.off)±(2%+0.05)Ω  
Load Life in HumidityJIS-C-5202 7.9 : 40±2oC, 90~95% RH at RCWV for 1000 hrs±(3%+0.05)Ω  
(1.5hrs. on, 0.5 hrs. off)  
Load LifeJIS-C-5202 7.10 : 70oC at RCWV for 1000hrs (1.5hrs.on, 0.5hrs.off)±(3%+0.05)Ω  
Temperature Cycling　±(1%+0.05)Ω  
Soldering Heat　±(1%+0.05)Ω  
              
  
  
  
              
  
  
  
  
  
  
  
 

 

 

 
Last Updated ( Sunday, 07 June 2009 10:29 )
 
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