Flame-Proof Type Metal Film Resistors - FMF Series

METAL FILM RESISTORS - FLAME-PROOF TYPE FMF Series
TYPE	POWER		FEATURES
FMF-25	1/4W,		Power Rating: 0.25W, 0.5W, 1W, 2W.
FMF-50	1/2W		Resistance Tolerance: ±1%, ±5%.
FMF-100	1W		T.C.R.: ±50ppm/ ℃ , ±100ppm/ ℃.
FMF-200	2W		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:
Style			FMF-25	FMF-50	FMF-100	FMF-200
Power Rating 70oC			1/4W	1/2W	1W	2W
Operating Temp. Range			-55oC ~ +155oC
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 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 TEST			TEST METHOD						APPRAISE
Short Time Overload			JIS-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 seconds						By Type
Temperature Coefficient			JIS-C-5202 5.2 : -55oC ~+155oC						By Type
Insulation Resistance			JIS-C-5202 5.6 : in V-Block						≧1000 MΩ
Solderability			JIS-C-5202 6.5 : 230oC 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)						±(2%+0.05)Ω
Load Life in Humidity			JIS-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 Life			JIS-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