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WFH160LR47KE

WFH160LR47KE首页预览图
型号: WFH160LR47KE
PDF文件:
  • WFH160LR47KE PDF文件
  • WFH160LR47KE PDF在线浏览
功能描述: Aluminum Housed Wirewound Power
PDF文件大小: 111.16 Kbytes
PDF页数: 共1页
制造商: OHMITE[Ohmite Mfg. Co.]
制造商LOGO: OHMITE[Ohmite Mfg. Co.] LOGO
制造商网址: http://www.ohmite.com
捡单宝
供应商
型号
品牌
封装
批号
库存数量
备注
询价
  • 深圳兴中扬电子科技有限公司

    4

    0755-8374714418126038344张先生深圳市罗湖区清水河街道168号11013260

  • WFH160LR47KE
  • KEMET(基美) 
  • Radial 
  • 2020+ 
  • 50000 
  • 专业电感线圈供应商,假一罚十 
  • Email:1595882684@qq.com
  • 深圳市华康联电子科技有限公司

    5

    0755-82548890,8295172118928492153,18902447048朱利燕,唐球优0755-82541490赛格广场2810A11012671

  • WFH160LR47KE
  • Ohmite 
  • 原装 
  • 20年 
  • 6875 
  • 原装现货 
  • Email:1258478764@qq.com
  • 东莞鼎岑科技有限公司

    5

    1892558198913549236572岑小姐塘厦镇林村塘厦大道北445号钜业大厦31911012805

  • WFH160LR47KE
  • Ohmite 
  • 原装 
  • 2021+ 
  • 7685 
  • 全新原装现货商,支付定货。 
  • Email:1936248865@qq.com
PDF页面索引
100%
30 Ohmite Mfg. Co. 1600 Golf Rd., Rolling Meadows, IL 600081-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com info@ohmite.com
Ohmite Mfg. Co. 1600 Golf Rd., Rolling Meadows, IL 60008 1-866-9-OHMITE Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com info@ohmite.com 31
WFH Series
Aluminum Housed Wirewound Power
F E A T U R E S
Solder, wire and “Fast-On”
Termination
More resistors in one profile pos-
sible
Custom wire lengths available
S P E C I F I C A T I O N S
Power rating: 90W-330W
Resistance tolerance: ±5%, ±10%
Temperature Coefficients:
Normal: 50ppm - 150ppm
Low ohmic values: 400ppm
Dielectric strength: 2500 VAC
peak
Working voltage: 1200 VAC
Test voltage: 6000 VAC
Lead wire: (wire terminal version
only): XLPE, 600V, 125C, 18
AWG stranded
Insulation: Silicone Rubber
& Mica. The Silicone is UL-
recognised (UL 94 HB) to a
working temperature of 220°C.
Temperatures of up to 300°C can
be endured for shorter periods.
This may however cause an
expansion of the silicone rubber
with a possibility of reducing the
dielectric strength.
Power Resistance
Rating* Range Dimension (mm)
Type (watts) (Ω) A B L
WFH90 90 0.22Ω – 6.8K 70 39.7 53
WFH160 160 0.47Ω-18K 140 80 123
WFH230 230 0.82Ω-27K 210 2x 80 193
WFH330 330 1Ω - 39K 280 2x 100 263
*at 40°C base plate temperature
4.8
6
0.6
ø2.2
300
10
Wire
terminal
Lug
terminal
A
B
6.3
51
41
15
13.6
12.6
8
0.8
ø4.5
L
Amp
terminal
W/Resistor
Heat Sink Temperature, °C
40° 60° 80° 100° 120° 140°
100
150
200
300
50
250
350
0
WFH330
WFH160
WFH230
WFH90
P O W E R D I S S I P A T I O N
O R D E R I N G I N F O R M A T I O N
Series
Terminal Type
L =
lug terminals
A =
amp terminals
W=
30cm insulated wire cable 18AWG
Tolerance
J = 5%
K = 10%
Wattage
at 40°C
base plate
temp.
Ohms
R47= 0.47
RoHS
Compliant
S T A N D A R D P A R T N U M B E R S F O R W F H S E R I E S
Ohmite’s new flat core winding
technology allows for wire-
wound heatsinkable resistors
affording a very low profile,
and superior thermal transfer
characteristics when compared
to conventional aluminum
housed wirewound resistors.
Close mounting of heat sensi-
tive components is possible
due to only a slight rise of the
temperature on the aluminum
profile.
No heat sink compound is
required because of large
mounting surface.
This graph shows the maximum wattage rating for each possible resistor
of standard size corresponding to the heat sink temperature. It is as-
sumed that all resistors are equally loaded.
resistor
surface to
heat sink
R
TH
4
R
TH
1
wire to
aluminum
housing
aluminum
housing
to air
R
TH
2
R
TH
3
aluminum
housing to
heat sink
T H E R M A L R E S I S T A N C E S
Thermal Resistance (°C/W) between different
measuring points
WFH90 WFH160 WFH230 WFH330
R
TH
1
2 1 0.75 0.5
R
TH
2
6.8 3.9 2.75 2
R
TH
3
0.1 0.05 0.03 0.02
R
TH
4
0.3 0.17 0.1 0.085
D E S I G N I N G
The following equations are applied in the dimensioning of the resistors at
stationary load. If more information is required please consult Ohmite. It is
assumed that the air around the resistors is stationary (worst case). See
ohmite.com for more examples.
1. WFH is mounted on a heat sink:
A. The thermal resistance RTH of the heat sink is known,
T = W
MAX
x (R
TH4
+ R
TH
)
Check that:
T
MAX
= W
MAX
x (R
TH
+ R
TH3
+ R
TH1
) + T
AMB
<220°C
B. The Temperature of the Heat Sink is known,
T = W
MAX
x R
TH4
+ T
H
Check that:
T
MAX
= W
MAX
x (R
TH1
+ R
TH3
) + T
H
<220°C
2. WFH is mounted without a heat sink:
Check that:
T
MAX
= W
MAX
x (R
TH1
+ R
TH2
) + T
AMB
<220°C
Where:
W
MAX
= Maximum reguired load in resistor
T
MAX
= Maximum hot spot temperature reguested in resistor (T
MAX
<220°C) The lower T
MAX
the higher reliability and lifetime.
T
AMB
= Ambient temperature
R
TH
= Thermal resistance. Refer to table Thermal resistances
T
H
= Heat sink temperature (chassis).
T = Temperature on top of the Aluminum profile.
WFH90L4R7KE
WFH90L10RKE
WFH90L25RJE
WFH90L50RJE
WFH90L100JE
WFH90L470JE
WFH90L750JE
WFH90L1K0JE
WFH90L2K7JE
WFH90L5K0JE
WFH160LR47KE
WFH160L1R0KE
WFH160L2R0KE
WFH160L10RKE
WFH160L27RJE
WFH160L50RJE
WFH160L75RJE
WFH160L100JE
WFH160L150JE
WFH160L250JE
WFH160L1K0JE
WFH160L5K0JE
WFH160L10KJE
WFH230L1R0KE
WFH230L2R0KE
WFH230L5R0KE
WFH230L10RKE
WFH230L27RJE
WFH230L50RJE
WFH230L75RJE
WFH230L100JE
WFH230L150JE
WFH230L250JE
WFH230L1K0JE
WFH230L1K5JE
WFH230L2K5JE
WFH330L1R0KE
WFH330L2R0KE
WFH330L10RKE
WFH330L27RJE
WFH330L50RJE
WFH330L75RJE
WFH330L100JE
WFH330L150JE
WFH330L250JE
WFH330L1K0JE
WFH330L5K0JE
WFH330L10KJE
Check product availability at www.ohmite.com
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