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nducTance
rhx s
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F
eatureS
• Resistances from 51k Ohms
• High Stability Film Resistance Elements
• Rated Power of 35, 50 and 100 Watts
• TO-220 and TO-247 Housing
• Resistance tolerance of ± 0.1% or ± 1%
• Low Inductance of < 10nH for RHXH1 and RHXH2,
<50nH for RHXH3
a
pplicationS
• Power Inverters
• Power Supplies
• Engine Sensors
• Temperature Sensors
p
roduct
S
ummary
PRODUCT SERIES
(RHX)
RESISTANCE RANGE (Ω)
3
MIN
MAX
POWER RATING (W)
HEATSINK
1
FREE AIR
2
THERMAL
RESISTANCE
TOLERANCES
RHXH1
RHXH2
RHXH3
0.02
0.02
0.02
51K
51K
51K
35
50
100
1
1
3
3.3ºC/W
2.3°C/W
1.3°C/W
± 1% ( R
≥
0.1Ω )
± 5%
± 1% ( R
≥
0.1Ω )
± 5%
± 1% ( R
≥
0.10Ω )
± 5%
1
2
Power Rating based on 25ºC Flange Temperature
Power Rating based on 25ºC Ambient Temperature
Contact Factory for Higher or Lower Values
a
Vailable
o
ptionS
(Consult Factory)
•
Special Testing Requirements
3
TEMPERATURE COEFFICIENTS:
± 50ppm/°C ( R
≥
10Ω )
± 100ppm/°C ( 0.1Ω
≤
R < 10Ω )
± 250ppm/°C ( R < 0.1Ω )
H
ow to
o
rder
RHX
RESISTOR HIGH POWER
LOW INDUCTANCE
H2
PACKAGE CODE
H1, 35W, TO-220
H2, 50W, TO-220
H3, 100W, TO-247
Q
TEMPERATURE COEFFICIENT
OF RESISTANCE (TCR)
Q = ± 50ppm/°C
N = ± 100ppm/ºC
K = ±250ppm/ºC
038K0
RESISTANCE
0R038 = 0.038Ω
003K8 = 3.8KΩ
038K0 = 38.0KΩ
380K0 = 380.0KΩ
003M8 = 3.8MΩ
Letter denotes decimal place.
R = decimal., “K” 10
3
, “M” 10
6
Remaining 4 digits are
significant or placeholders.
F
TOLERANCE
F = ± 1.0% (R ≥ 0.1Ω)
J = ± 5.0%
4
PACKING
4 = Tube
Tin/Lead coated leads, add "- Pb" on part number.
Standard Termination Finish: Matte Tin (Sn)
Example P/N: RHXH2Q038K0F4 is Resistor High Power Low Inductance, 50W TO-220, ±50ppm/ºC, 38.0KΩ, ±1.0%, tube
50
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HaracteriSticS
Electrical Characteristics
Maxiumum Current
Inductance
Insulation Resistance
Dielectric Strength
Temperature Range
Maximum Working Volt-
age
RHXH1 & RHXH2 Values
25A
<10nH ( At the Standoff )
>1000 Megohm
2000 VAC
-55°C to +155°C
(500V MAX) 700 V or
RHXH3 Value
-
-
>1000 Megohm
2500 VAC
-55°C to +155°C
, whichever is less
Power Derating Curve
120
Rated Power ( % )
100
80
60
40
20
0
-25
0
25
50
75
100
125
150
175
Backplate Temperature (°C)
RHXH1 & RHXH2 POWER RATING NOTES:
H1 and H2 High Power Low Inductance Resistors must
be attached to a suitable heatsink. Without a heatsink,
the maximum power rating is 1W.
The maximum internal resistor temperature is 155°C.
Use the following formula to specify an appropriate
heatsink:
RHXH3 POWER RATING NOTES:
H3 High Power Low Inductance Resistors must be
attached to a suitable heatsink.
The maximum internal resistor temperature is 155°C.
Use the following formula to specify appropriate
heatsink:
Where
:
R
qH
= Thermal Resistance of Heatsink ( °C/W )
R
qR
= Thermal Resistance of Resistor ( °C/W )
TMAX = Maximum Temperature of Resistor ( °C )
TA = Ambient Temperature of Heatsink ( °C )
P = Power Through Resistor ( W )
www.johanson dielectrics.com
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ecHanical
c
HaracteriSticS
RHXH1 & RHXH2
MOUNTING NOTES:
H1 and H2 High Power Low Inductance Resistors
must
be attached to a suitable heatsink.
Use thermal grease to mount resistor to a clean, flat
surface.
Use a compression washer to provide 150 to 300
pounds ( 665 to 1330N ) of mounting force.
Torque mounting screw to 8 in-lbs ( 0.9 N-m ).
Mounting tab is isolated from both pins.
RHXH3
MOUNTING NOTES:
H3 High Power Low Inductance Resistors must be
attached to a suitable heatsink.
Use thermal grease to mount resistor to a clean,
flat surface.
Use a compression washer to provide 150 to
300 pounds ( 665 to 1330N ) of mounting force.
Torque mounting screw to 8 in-lbs ( 0.9 N-m ).
Back plate is isolated from both pins.
e
nVironmental
c
HaracteriSticS
D
R
Environmental Performance
Humidity Resistance
Load Life
Temperature Cycle
Vibration
Solder Heat
Moisture Sensitivity Level: MSL-1
RHXH1
RHXH2
±1% + 0.05Ω
±1% + 0.05Ω
RHXH3
Test Conditions
40°C, 90-95% RH, DC 0.1W, 1000 hr
25°C, 90 min ON, 30 min OFF, 1000 hr
-55°C for 30 min, +155°C for 30 min, 1000
hr
IEC60068-2-6
+350°C, 3s
±0.25% + 0.05Ω
±0.25% + 0.05Ω
±0.1% + 0.05Ω
52
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Authorized Distributor
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:
RHXH1N006R8F4 RHXH1N005R6F4 RHXH2N002R0F4 RHXH2N005R6F4 RHXH3Q180R0F4 RHXH1Q270R0F4
RHXH3Q030K0F4 RHXH1N007R5F4 RHXH3K00R04J4 RHXH1N003R9F4 RHXH1Q001K3F4 RHXH1N005R0F4
RHXH1Q002K0F4 RHXH2Q200R0F4 RHXH1Q003K3F4 RHXH3Q068R0F4 RHXH1N006R2F4 RHXH3N00R51F4
RHXH2N001R8F4 RHXH2Q022K0F4 RHXH3N00R68F4 RHXH3Q220R0F4 RHXH3N008R2F4 RHXH1N00R27F4
RHXH3Q560R0F4 RHXH2Q011R0F4 RHXH1N002R0F4 RHXH1Q047R0F4 RHXH2Q002K7F4 RHXH3Q018K0F4
RHXH2Q005K1F4 RHXH1Q150R0F4 RHXH1K00R05J4 RHXH3Q750R0F4 RHXH1N00R15F4 RHXH2Q030K0F4
RHXH3Q002K7F4 RHXH3N000R2F4 RHXH3Q390R0F4 RHXH2Q068R0F4 RHXH3Q007K5F4 RHXH1Q910R0F4
RHXH1N003R0F4 RHXH2Q036R0F4 RHXH3Q036K0F4 RHXH2Q270R0F4 RHXH3Q005K0F4 RHXH2Q018K0F4
RHXH3Q300R0F4 RHXH3N00R91F4 RHXH2Q250R0F4 RHXH2Q043R0F4 RHXH2Q082R0F4 RHXH1Q030K0F4
RHXH3N00R15F4 RHXH1Q001K5F4 RHXH2Q013K0F4 RHXH2N00R39F4 RHXH2N00R43F4 RHXH3N00R36F4
RHXH3Q005K6F4 RHXH2Q006K2F4 RHXH1Q005K1F4 RHXH1K00R02J4 RHXH2Q013R0F4 RHXH1Q022R0F4
RHXH3Q009K1F4 RHXH3N009R1F4 RHXH2N00R36F4 RHXH2N00R24F4 RHXH2N003R3F4 RHXH1N00R75F4
RHXH3Q005K1F4 RHXH2Q004K7F4 RHXH1Q003K9F4 RHXH3Q004K3F4 RHXH3Q001K2F4 RHXH2Q015R0F4
RHXH3Q043R0F4 RHXH3N007R5F4 RHXH3Q003K3F4 RHXH2K00R03J4 RHXH1Q390R0F4 RHXH3N001R8F4
RHXH3N00R22F4 RHXH1K0R015J4 RHXH1Q001K0F4 RHXH3N005R0F4 RHXH2Q330R0F4 RHXH3Q006K8F4
RHXH2Q020R0F4 RHXH2Q024K0F4 RHXH3Q047R0F4 RHXH2Q075R0F4 RHXH3K0R015J4 RHXH3Q012K0F4
RHXH2N00R51F4 RHXH2Q120R0F4 RHXH3N00R56F4 RHXH3Q004K7F4
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