20W TO126
OBSOLETE
High Power Resistors
MHP 20 S
(Combined BI & IRC Datasheets)
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Non-Inductive, Small, 20 Watt high power resistor.
TO-126 style package offering a very low thermal
resistance of 5.9 °C/W.
Complete thermal flow design available for easy
implementation.
Superior vibration durability.
Small thin package for high density PCB installation.
RoHS compliant
Applications
High frequency emitter resistors in switching power supplies.
High precision CRT color video amplifiers.
High frequency snubber and pulse handling circuits.
VHF amplifiers.
Pulse generator load resistors.
Specifications
Items
Power Rating
Power Rating
Thermal Resistance
Resistance Range
Nominal Resistance Series
TCR
Tolerance
Operation Temp. Range
Dielectric Withstand Voltage
Load Life
Humidity
Soldering Heat (Max)
Solderability
Insulation Resistance
Vibration
Specifications subject to change without notice
Note:
1. Electrically isolated metal tab.
2. Recommend the use of thermal grease between metal tab and heat sink.
3. Thermal design should account for a thermal resistance between resistor and tab of 5.9°C/W and a maximum resistor temperature of 155°C.
4. Current rating: 25A maximum.
5. For the resistance range 220 to 51K , the power rating is restricted to 10W.
Specification
20 Watts
1 Watts
5.9°C/W
0.01-0.09
E6
250 ppm/°C
+/-5%
0.1-9.1
E24
100 ppm/°C
+/- 5% and 1%
-55 to +155 °C
2000 Volts DC
R +/- (1.0 %+0.05
R +/- (1.0 %+0.05
R +/- (1.0 %+0.05
Min 95% coverage
Over 1000 M
R +/- (0.25 %
)
)
)
)
10-220
E24
50 ppm/°C
+/- 1%
Conditions
@ Tab Temp < 25°C
Free air.
From hot spot to tab.
Extended resistance range to 51K
Additional 2.0
and 5.0
available
also available
For -55 to +155°C
60 seconds. between terminals and flange
25°C, 90 min. ON, 30 min.OFF, 1000 hours.
60°C, 90-95% RH, DC 0.1W, 1000 hours.
250+/-5°C, 3 seconds,
230+/-5°C, 3 seconds.
Between terminals and metal back plate.
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
04.12
20W TO126 High Power Resistors
MHP 20 S
OBSOLETE
Electrical Performance
Electrical Performance
Derating Curve
Rating Power (W), with 2.8 C/W heat sink.
MHP 20S 100 F
Flange Temperature Rise
( C)
140
120
MHP 20S 100 F
10
8
6
4
2
0
-50
+155 C
+25 C
100
80
60
40
20
0
0
10
Power (W)
20
0
50
100
150
Flange Temperature ( C)
200
Frequency Characteristics
Impedance ( )
1K
MHP 20S 1K0 F
MHP 20S 101 F
MHP 20S 500 F
Pulse Energy Durability
Pulse peak power (W)
100K
Tentative continuous-pulse power allowance at duty 0.01
Load life test will be necessary in actual equipment.
Because curve will be changed by resistance, repetition,
duty and operating temperature.
200W
100
20W
MHP20S-100F
10K
100
1K
10
MHP 20S 5R0 F
10
10n
100n 1 u
10u
1
100K
1M
10M
100M
1G
10G
100u
1m 10m 100m
Pulse width (seconds)
1
10
100
Frequency(Hz)
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
04.12
MHP20S Series
Power Resistor
OBSOLETE
MHP20S Series
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TO-126 housing
Low inductance and capacitance for
high frequency circuits
20W power rating
High stability film resistance elements
RoHS compliant
IRC’s MHP20S series resistors satisfy demanding applications for accurate and stable power resistors housed in the
convenient TO-126 case. The resistance element is isolated from the mounting tab by an alumina ceramic layer, providing
very low thermal resistance and ensuring high insulation resistance between terminals and tab. The non-inductive design
makes these products especially useful in high frequency and high speed pulse applications.
Electrical Data
Power Rating
1
Heatsink
2
Free Air
3
Voltage
Thermal
Rating
4
Resistance
Resistance Range
Min
0.01Ω
Max
0.09Ω
9.1Ω
51KΩ
Nominal
Tolerances Resistance
Series
5
E24
Includes
2.5 & 5.0
multiplier
Typ. TCR
(ppm/°C)
Inductance Capacitance
20W
1.0W
500 V
5.9°C/W
0.1Ω
10Ω
±1%, ±5%
See Chart
<10nH
<2pF
1
2
3
TCR (ppm/°C) 0 to 100°C
Maximum current 25 amps
Power rating based on 25°C case temperature
Power rating based on 25°C ambient temperature
4
Maximum voltage 500V or
√
P x R
5
Contact factory for availability of resistance or tolerance
values outside this range
Typical TCR For Low Values
250
200
150
100
50
0.01
0.1
1.0
Resistance (Ohms)
Pulse Energy Durability
10K
1K
Frequency Characteristics
MHP20S 1K
Pulse Peak (Watts)
1K
Damage Level
Impedance (ohms)
MHP20S 100R
100
MHP20S 50R0
MHP20S 10R0
100
Safety Zone
10
10µ
10
MHP20S 5R0
100µ
1m
10m
100m
1
100K
1M
10M
100M
1G
10G
Pulse Width (seconds)
Frequency(Hz)
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
09. 11
MHP20S Series
Power Resistor
MHP20S Series
OBSOLETE
G
C
Physical Data
A
D
B
F
Dim
A
B
C
D
E
In (nom)
0.335
0.472
0.122
0.122
0.669
0.126
0.150
0.069
0.020
0.024
0.055
0.200
mm
8.5 ±0.2
12.0 ±0.2
3.1 ±0.2
3.1 ±0.1
17.0 ±1.0
3.2 ±0.5
3.8 ±0.2
1.75 ±0.1
0.5 ±0.05
0.6 ±0.05
1.4 ±0.05
5.08 ±0.1
E
F
K
L
G
J
H
M
Case, Epoxy UL94-V0
Leads, Sn Plated Cu
Conductor, Cu
Resistor, Ni-Cr or RuO
Substrate, Alumina
Tab, Ni Plated Cu
H
J
K
L
Insulated Between Tab and Resistor
M
Lead & Tab Material
Part Weight
Tin Plated Copper
0.9g
Environmental Data
Test
Load Life
Humidity
Short Time Overload
Vibration
Insulation Resistance
Dielectric Withstanding Voltage
Resistance to Solder Heat
Solderability
Operating Temperature Range
Method
1,000 Hours @ 25°C;
90 minutes on, 30 minutes off
1000 hours; 40°C, 90-95% RH, 0.1W DC
2X Rated Power, not to exceed 1.5X Rated Voltage
for 5 seconds, 25° w/ Heat Sink
10 cycles; X, Y, Z axis, amplitude 0.75mm, 100-
2000Hz sweep/min
Between terminals and tab
Terminals to tab; 60sec, 1mA
350 ± 5°C for 3 seconds
230 ± 5°C, 3sec.
Specification - Performance
±(1.0% + 1mΩ)
±(1.0% + 1mΩ)
±(0.25% + 1mΩ)
±(0.25% + 1mΩ)
>1000MΩ
2000 volts AC
±(0.10% + 1mΩ)
>95% coverage
-55°C to +155°C
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
09. 11
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