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電阻型錄 > 金屬皮膜 > FMF不燃型
FMF不燃型
FMF Series Flame-Proof Type Metal Film Resistors
METAL FILM RESISTORS
FLAME-PROOF TYPE FMF Series
1/4W, 1/2W, 1W, 2W
FMF-25, FMF-50, FMF-100, FMF-200
INTRODUCTION
Featuring consistency and stably-controlled, these carbon film resistors with reasonable prices are widely & largely used in the electronic, electrical and information industries.
This resistor is a ceramic bar tightly coated with a carbon film which is composed of carbon separated from organic compound through the treatment of high-temperature vacuum. After the carbon-coated bar is connected with proper joint and engraved with grooves, its surface is finished with epoxy resin so that the bar is enclosed with a protective film.
FEATURES
  • Power Rating: 0.25W, 0.5W, 1W, 2W.
  • Resistance Tolerance: add.gif (65 bytes)1%, add.gif (65 bytes)5%.
  • T.C.R.: add.gif (65 bytes)50ppm/ oc.gif (70 bytes) , add.gif (65 bytes)100ppm/ oc.gif (70 bytes).
  • Complete flameproof construction-UL 1412.
  • Value range: 1 ohm.gif (71 bytes) ~ 1M ohm.gif (71 bytes)
DIMENSIONS:
STYLE DIMENSION (mm) POWER RATING
(Watt)
L D H d
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

Style FMF-25 FMF-50 FMF-100 FMF-200 - -
Power Rating 70 o C 1/4W 1/2W 1W 2W - -
Operating Temp. Range -55 o C ~ +155 o C
Max. Working Voltage 250V 350V 500V 500V - -
Max. Overload Voltage 500V 700V 1000V 1000V - -
Dielectric Withstanding Voltage (AC) 500V 700V 1000V 1000V - -
Max. Intermittence Overload Voltage 300V 500V 1000V 1000V - -
Value Range1Ω-1MΩ 1ohm.gif (71 bytes) ~1M
Temp. Coefficient (by Type) 50ppm, 100ppm
* The listed resistance range for standard resistance, below or over this resistance is on request.

ENVIRONMENTAL CHARACTERISTICS

PERFORMANCE TEST TEST METHOD APPRAISE
Short Time Overload JIS-C-5202 5.5 : 2.5 times RCWV for 5 seconds (0.25%+0.05 ohm.gif (71 bytes))
Dielectric Withstanding V. JIS-C-5202 5.7 : in V-Block for 60 seconds By Type
Temperature Coefficient JIS-C-5202 5.2 : -55 o C ~+155 o C By Type
Insulation Resistance JIS-C-5202 5.6 : in V-Block ≧ 1000 M ohm.gif (71 bytes)
Solderability JIS-C-5202 6.5 : 235 o C for 5 0.5 seconds 95% min. coverage
Resistance to Solvent JIS-C-5202 6.9 : Trichroethance for 1 min. with ultrasonic no deterioration
Terminal Strength Direct load for 10 sec. In the direction of the terminal leads ≧2.5KG/24.5N
Pulse Overload JIS-C-5202 5.8 : 4 time RCWV 10000 cycles(1 sec.on, 25 sec.off) (0.5%+0.05 ohm.gif (71 bytes))
Load Life in Humidity JIS-C-5202 7.9 : 40 2 o C, 90~95% RH at RCWV for 1000 hrs
(1.5hrs. on, 0.5 hrs. off) 		(0.5%+0.05 ohm.gif (71 bytes))
Load Life JIS-C-5202 7.10 : 70 o C at RCWV for 1000hrs (1.5hrs.on, 0.5hrs.off) (0.5%+0.05 ohm.gif (71 bytes))
Temperature Cycling JIS-C-5202 7.4 : 65 o C~room temp.~150 o C~room temp for 5 cycle (0.25%+0.05 ohm.gif (71 bytes))
Soldering Heat JIS-C-5202 6.4 : 350 10 o C for 3 0.5 seconds (0.25%+0.05 ohm.gif (71 bytes))
* The listed resistance range for standard resistance, below or over this resistance is on request.
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