FWXXA Datasheet, PDF (2/4 Pages) Bourns Electronic Solutions – Fusible Power Resistors

FWxxA Series Fusible Power Resistors
Performance Specifications
Characteristic
Limits
Temperature Coefficient
±200 PPM/°C max.
Short Time Overload
Resistance change rate is ±5 % max., with
no evidence of mechanical damage.
Terminal Strength
No evidence of mechanical damage.
Resistance to Soldering Heat
Resistance change rate is ±1 % max., with
no evidence of mechanical damage.
Solderability
95 % coverage minimum
Load Life in Humidity
Safety Fuse
Resistance change rate is ±5 % max., with
no evidence of mechanical damage.
Resistance value shall increase at least
100 times initial value.
Dielectric Withstanding
Voltage
No evidence of flashover mechanical
damage, arcing or insulation breakdown.
Test Method
(JIS-C-5201 & JIS-C-5202)
4.8 Natural resistance changes per temperature (°C):
R2-R2
R1(T2-T1)
x
10⁶
(PPM/°C)
R1: Resistance value at room temp. (T1)
R2: Resistance value at room temp. +100 °C (T2)
4.13 Permanent resistance change after the application of a
potential of 2.5 times RCWV for 5 seconds.
4.16 Direct Load:
Resistance to a 2.5 kg direct load for 10 seconds in the
direction of the longitudinal axis of the terminal leads.
Twist Test:
Terminal leads shall be bent through 90 ° at a point of
approximately 6 mm from the body of the resistor and
shall be rotated through 360 ° (about the original axis of
the bent terminal) in alternating directions for a total of
three rotations.
4.18 Permanent resistance change when leads are immersed
to a point 2.0 to 2.5 mm from the body in 260 °C (±5 °C)
solder for 10 (±1) seconds.
4.17 The area covered with a new, smooth, clean, shiny and
continuous surface free from concentrated pinholes.
Test temp. of solder: 245 °C (±3 °C).
Dwell time in solder: 2~3 seconds.
7.9 Resistance change after 1,000 hours (1.5 hours “ON”,
0.5 hours “OFF”) at RCWV in a humidity test chamber
controlled at 40 °C (±2 °C) and 90-95 % relative humidity.
1 W ~ 5 W:Load 120/240 VAC voltage.
7 W: Load 240 VAC voltage.
Resistor must be safely fused.
UL1412,
19.1 A resistor (or a resistor and its mounting if provided),
shall withstand, without breakdown, for a period of not
less than one minute, a 60 Hz potential of 1000 V plus
twice the rated voltage applied between live parts and
dead metal parts, if any.
Typical Part Marking
1st Significant Figure
2nd Significant Figure
3rd Significant Figure
Multiplier
Tolerance
Color
Black
Brown
Red
Orange
Yellow
Green
Blue
Violet
Grey
White
Gold
Silver
1st Band
0
1
2
3
4
5
6
7
8
9
2nd Band
0
1
2
3
4
5
6
7
8
9
3rd band
0
1
2
3
4
5
6
7
8
9
Multiplier
1Ω
10 Ω
100 Ω
1 KΩ
10 KΩ
100 KΩ
1 MΩ
10 MΩ
0.1 Ω
0.01 Ω
Tolerance
±1 %
±2 %
±0.5 %
±0.25 %
±0.10 %
±0.05 %
±5 %
±10 %
Specifications are subject to change without notice.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their specific applications.