SMF Power Metal Film Chip Resistors

SMF Power Metal Film Chip Resistors Features: 1. Flameproof UL94V0 molded package, resistant to heat,humidity & insulation. 2. Special design for automatic surface mounting. 3. Excellent mechanical strength & electrical stability. 4. Reducing assembly costs.

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Product Description

SMF Power Metal Film Chip Resistors

Products

SMF Power Metal Film Chip Resistors

Features

1. Flameproof UL94V0 molded package, resistant to heat,humidity & insulation.

2. Special design for automatic surface mounting.

3. Excellent mechanical strength & electrical stability.

4. Reducing assembly costs.

Electrical And Mechanical Performance of SMF Power Metal Film Chip Resistors:

Characteristics	Standards	Test Methods
Resistance Tolerance	±5%(J)or ±1%(F)	-
Resistance Temp. Coeff.	±100 ppm/°C	-55°C ~ 200°C
Power Rating Load	Surface temp. 275°C Max.ΔR/R≤±1%	Rated voltage for 30 minutes
Short Time Overioad	±0.05%	5 times of rated wattage for 5 seconds.
Dielectric Withstanding Voltage	No evidence of mechanical damage or insulation breakdown.	AC 500V for 1 minutes
Insulation Resistance	10,000MΩ	DC 500V megger
Solder-ability	Minimum95%coverage	235 ± 5°C for 2 seconds
Resistance to Soldering Heat	No evidence of mechanical damage.ΔR/R≤±1%	270±5°Cfor 10 ±1 seconds

Environmental Characteristics of SMF Power Metal Film Chip Resistors:

Characteristics	Standards	Test Methods
Temp. Cycle	△R/R≤±1%	-55°C( 30 min.) —►Room Temp.( 3 min.) —► +200°C( 30 min.) —► Room Tenp.( 3 min.) / ( 5 cycles)
Load Life	△R/R≤±1%	Rated power load 90 minutes ON 30 minutes OFF 70°C 1000 hours
Moisture-proof Load Life	△R/R≤±1%	Rated power load 90 minutes ON 30 minutes OFF 40°C95%RH 500 hours

Dimensions of SMF Power Metal Film Chip Resistors:

Rated Wattage	A±0.3	B±0.3	C±0.3	D±0.3	EMax.	F±0.3	Resistance Range(Ω)	MAX. Working Voltage
2W	4.0	6.7	1.4	3.55	7.9	1.5	10~2M	300V
3W	5.5	10.5	1.7	5.0	12	2.3	10~2M	500V
5W	7.3	13.5	1.7	6.8	17	2.5	10~2M	500V