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1.General Instruction

General Specifications
Normal Type	MF-0204	MF-0207	MF-0410	MF-0414	MF-0617	MF-0718
Rated Power	1/8W	1/4W	1/2W	1W	2W	3W
Mini Type	MF-0207S	MF-0410S	MF-0414S	MF-0617S	MF-0718S	MF-0925S
Rated Power	1/4WS	1/2WS	1WS	2WS	3WS	5WS
Standard Dimensions (mm)
Body Length (L)	3.5±1.0	6.5±1.0	9.0±1.0	11±1.0	15±1	17±1
Body Diameter (D)	1.7±1.0	2.3±1.0	3.2±1.0	4.5±1.0	5.0±0.5	6±0.5
Lead Length (H)±2	27±2.0	26±2.0	25±2.0	30±2.0	33±2.0	33±2.0
Lead Diameter (d) ± 0.05	0.40±0.05	0.48±0.05	0.52±0.05	0.72±0.05	0.72±0.05	0.72±0.05
Electrical Specification
Din Size	0204	0207	0410	0414	0617	0718
Maximum Working Voltage (V)	200	250	350	500	500	500
Maximum Overload Voltage (V)	400	500	700	1000	1000	1000
Resistance Range (±1%(F))	0.1Ω-1MΩ	0.1Ω-1MΩ	0.1Ω-1MΩ	10Ω-100K	10Ω-100K	10Ω-100K
(±0.5%(D))	100Ω-511KΩ	100Ω-511KΩ	100Ω-511KΩ	100Ω-51KΩ	100Ω-51KΩ	100Ω-51KΩ

 
 
 
FOperating Temperature. Range:-55℃~ +155℃.
 
FS=Miniature Type. For Example:0207S the body size of 1/8W but with rated power of 1/4W.
 
FThe taping dimension other than the standard is also available as per our taping specifications.
 
FThe resistance range of lower than 10Ωand higher than 1MΩand / or the tolerance is lower than 0.5%  are available on special request.
 
FColor of Body: Normal  type is Blue.
 
FPackaging: Taped / Box and Bulk.
  
FForming: P / M / MB / MK / F / FK1 / FK2 & FKK .
 
FStandard:JIS-C-5202

Power Derating Curve

 
 
 
 
 

 

2. Performance Specifications

 

Characteristics		Standard	Test Methods
1.  Resistance Temperature Coefficient  (PPM/℃)		±100 PPM/℃	Natural resistance change per temperature degree centigrade. (PPM/℃) R1: Resistance value at reference temperature. (T1) R2: Resistance value at reference temperature.(T2) T1: Room Temperature T2: T1±100℃
2.  Dielectric  Withstanding  Voltage		No evidence of flashover, mechanical damage or arcing or, insulation break down.	Resistors shall be subjected to an approximately sinusoidal test potential (as below) 60Hz applied between both terminals connected together and a  90° V-Block extending beyond the end of the resistor.
			Resistor Wattage			DC Volts
			1/8W  (1/4WSi) 1/4W  (1/2WS) 1/2W  1W,2W Above			150 350 600
3.  Solderability		90% Covered min.	The terminal lead shall be dipped into molten solder s at 3.2 to 4.8mm from the body of resistor.The temp. and time as below: a. 235±5℃for 2±0.5 seconds b. 270±10℃for 2±0.5seconds
4.  Resistance to Soldering		No evidence of mechanical damage  ΔR/R at ±0.5% Max	The terminal of the resistor is dipped into the molten solder of 350±10℃for 3±0.5 seconds. Then put the resistor in the room temperature. For min.3 hours.
5.  Humidity Load Life		±1% Max/1000Hours	Resistance change after 1000 hours ( 1.5 hours on  0.5 hours off)at rated continuous working voltage in a humidity chamber controlled at 40±2℃and 90~95% relative humidity .
6. Load Life		±1% Max/1000Hours	Permanent resistance change after 1000 hours  operating at rated continuous working voltage with a duly cycle of 1.5 hours on 0.5 hours off at 70 ± 2℃ambient .
7.  Temperature Cycling		±1% Max with no evidence of mechanical damage	Resistance change after continuous five cycles for duty cycle as specified below.
			Step		Temperature		Time
			1		-30℃		30 Minutes
			2		+25℃		10~15 Minutes
			3		+85℃		30 Minutes
			4		+25℃		10~15 Minutes
Characteristics	Standard			Test Methods
8.  Short Time   Overload	ΔR/R at±0.5% Max. with no evidence of arcing burning, or charring			Permanent resistance change after the application of a potential of 2.5 times rated continuous working voltage for 5 seconds at room temperature.
9. Terminal Strength	No  evidence  of  mechanical damage or loosening terminals			Direct load resistance to 2.5kg direct load 30±5 seconds twist test, for axial leads unit only. Terminal lead shall be bent through at a right angle at a point of 6.35mm from the body edge of resistor and shall be rotated through at a right angle about the original axis of the bent terminal in alternating direction for a total 3 rotations.