futaba-rf

Fusible Resistor ( RF Series )

FEATURES :
Function as a resistor in normal operation condition.
Quick fusing protects circuit from excessive overload.
CHARACTERISTICS：

ITEM	SPEC	REMARKS
Load life under high temperature	±5%	JIS-C-5202 7.10　Rated voltage at 70℃ for 1,000 hours
Load life under high humidity	±5%	JIS-C-5202 7.90　Rated voltage at 40℃,95% RH for 1,000 hours
Temp. coeff. of resistance	±350 ppm/℃	JIS-C-5202 5.20　Room temp. + 100℃
Short time overload	±2%	JIS-C-5202 5.50　4 times the rated power for 5 seconds
Temperature cycling	±1%	JIS-C-5202 7.40　5 cycles for -55 ~ +155℃
Immersion in solder	±1%	JIS-C-5202 6.40　350℃ for 3.5 seconds

Fusing characteristics ( Residual resistance ≧100 times nominal resistance )

Rated Power	Resistance Range					Fusing Time
RFU1/6W、RFS1/4W	0.10~1KΩ	0.10~0.18Ω	0.2~0.47Ω	0.51~1KΩ	------	60s MAX
RFU1/4W、RFU1/3W	0.10~15KΩ	0.10~0.22Ω	------	0.24~9.1Ω	1.0~15KΩ	60s MAX
RFS1/2W	0.10~33KΩ	------	------	0.10~1.0Ω	1.1~33KΩ	60s MAX
RFS1W	0.10~33KΩ	------	------	0.10~1.0Ω	1.1~33KΩ	60s MAX
RFU1/2W	0.10~4.7KΩ	0.10~0.33Ω	0.47~0.91Ω	1.0~9.1Ω	1.0~4.7KΩ	60s MAX
RFU1W、RFS2W	0.10~4.7KΩ	------	------	0.10~1.0Ω	1.1~4.7KΩ	60s MAX
RFU2W、RFS3W	0.10~4.7KΩ	------	------	0.10~1.0Ω	1.1~4.7KΩ	60s MAX

Various type of forming & taping are available

Coating color： RFU (gray), RFS (pink)

RATING、 DIMENSIONS　

Model	Power Rating (W)	Resistance Range E-24 Ω	Maximum Working Voltage	Maximum Overload Voltage	Dielectric Withstanding Voltage	Dimension (mm)
Model	Power Rating (W)	Resistance Range E-24 Ω	Maximum Working Voltage	Maximum Overload Voltage	Dielectric Withstanding Voltage	L	D φ	ι	d φ
RFU1/6、RFS1/4W	1/6、S1/4	0.1～1K	100V	150V	200V	3.5±0.5	1.7±0.3	27±3	0.45±0.05
RFU1/4、RFU1/3W	1/4、1/3	0.1～15K	250V	300V	250V	6±0.3	2.4±0.1	28±2	0.6±0.05
RFS1/2W	1/2	0.1～33K	250V	300V	250V	6±0.3	2.4±0.1	28±2	0.6±0.05
RFS1W	1	0.1～33K	250V	300V	250V	9±0.5	3.0±0.5	30±3	0.8±0.05
RFU1/2W	1/2	0.1～4.7K	250V	300V	250V	9±0.5	3.0±0.5	30±3	0.6±0.05
RFU1W、RFS2W	1、2	0.1～4.7K	350V	500V	300V		4.0±0.5	38±3	0.8±0.05
RFU2W、RFS3W	2、3	0.1～4.7K	350V	500V	300V		5.5±0.5	38±3	0.8±0.05

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