Datasheet

Features
n Fuses at 120 V or 240 V
n E24 resistance values
n RoHS compliant*
n UL 1412 recognized
n Coating material meets UL 94V-0
requirements
Applications
n White goods
n Inverters
n Lighting
n Metering
FWxxA Series Fusible Power Resistors
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
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.
DIMENSIONS:
MM
(INCHES)
Electrical Characteristics
Characteristic FW Series
Power 1, 2, 3, 5, 7** W
Resistance Range 4.7 ohms to 100 ohms (E24 values)
UL 1412 Recognized Resistance Range 4.7 ohms to 47 ohms
Tolerance 5 %
 TemperatureCoefcient ±200PPM/°C
 OperatingTemperatureRange -55°Cto+155°C
 MaximumVoltage √P*R
Fusing Point See Fusing Performance Chart
Fusing Time See Fusing Performance Chart
Product Dimensions
General Introduction
TheFWxxASeriesofaxialleadedwirewoundresistorsisdesignedtofuseunderabnormalconditionssuchassuddensurgesin
voltage or circuit malfunctions. The resistor will fuse upon application of 120 or 240 voltages.
Theresistorwillfusesafelyif120or240Visapplied.Thetimetofusedependsonthe
resistance value.
**7W=240Vaconly.
Materials
Resistor ............... Wire wound around a
ceramic core
Lead Wire ........................Tinned copper
Housing .......................... Insulated resin
CoatingMaterial ...........MeetsUL94V-0
requirements
*RoHS COMPLIANT
LEAD FREE
*RoHS COMPLIANT
VERSIONS
AVAILABLE
LEAD FREE
VERSIONS ARE
RoHS COMPLIANT*
Agency Recognition
Description
UL 1412 FileNumber:E349323
HL
D
d
(DIA.)
H
63.0 ± 2.0
(2.5 ± 0.08)
10.0 ± 0.5
(0.39 ± 0.02)
75.0 ± 2.0
(2.95 ± 0.08)
6.0 ± 1.0
(0.24 ± 0.04)
Model
Dimensions
D
(Max.)
L
(Max.)
H d
FW10A(1W)
5.0
(.197)
12
(.472)
28±3.0
(1.102±.118)
0.55±0.05
(.022±.002)
FW20A(2W)
6.0
(.236)
12
(.472)
28±3.0
(1.102±.118)
0.65±0.05
(.026±.002)
FW30A(3W)
6.5
(.256)
16
(.630)
28±3.0
(1.102±.118)
0.75±0.05
(.030±.002)
FW50A(5W)
7.5
(.295)
18
(.709)
28±3.0
(1.102±.118)
0.75±0.05
(.030±.002)
FW70A(7W)
9.5
(.374)
26
(1.024)
38±3.0
(1.496±.118)
0.75±0.05
(.030±.002)
How to Order
FW 10 A 7R50 J A
Model
 FW=Fusible
Wirewound
Rated Power
10 = 1.0 Watts
20 = 2.0 Watts
30 = 3.0 Watts
50 = 5.0 Watts
70 = 7.0 Watts
Pin Style
 A=Axial
Resistance Code
 • R<100ohms:
“R” represents decimal point
  (examples:7R50=7.5ohms)
 • R≥100ohms:
  Firstthreedigitsaresignicant,
  fourthdigitrepresentsnumberof
zeros to follow
  (example:1000=100ohms)
Resistance Tolerance
 J=±5%
Packaging
 A=AmmoPack
•1,000pcs./box:FW10,FW20,FW30
 •500pcs./box:FW50,FW70
Resistance
Value
(Ohms)
Resistance
Code
4.7 4R70
5.1 5R10
5.6 5R60
6.2 6R20
6.8 6R80
Popular Values
Resistance
Value
(Ohms)
Resistance
Code
7.5 7R50
8.2 8R20
9.1 9R10
10.0 10R0