MODEL SMHP
OBSOLETE
SMHP Series
(Combined BI & IRC Datasheets)
20W High Power Resistors
TO-263 Surface Mount
RoHS Compliant.
Non-Inductive, Small, 20 watt high power resistor.
TO-263 surface mount package offering a very
low thermal resistance.
Small thin package for high density PCB installation.
Suitable for board mounting with either solder or clip.
High frequency emitter resistors in switching
power supplies.
High precision CRT colour video amplifiers.
High frequency snubber and pulse handling circuits.
Pulse generator load resistors.
In-rush current protection.
Bleeder Resistors.
Electrical
ITEMS
Power Rating
Thermal Resistance
Resistance Range
Nominal Resistance Series
TCR (ppm/°C)
Tolerance
Operation Temperature Range
Maximum Operating Voltage
Dielectric Withstanding Voltage
Load Life
Humidity
Temperature Cycle
Soldering Heat (Max.)
Solderability
Insulation Resistance
Vibration
0.01 - 0.09
E6
250
±5%
SPECIFICATION
20 watt
2.0 watt
3.3°C/ W
0.1 - 9.1
E24
100
±1% & ±5%
-55°C to +155°C
500V or PR
2000 Vdc
R = ±1% +0.5
R = ±1% +0.5
R = ±1% +0.5
R = ±1% +0.5
Minimum 90% Coverage
Over 1,000 Meg
R = ±0.25% +0.5
60 Seconds
25°C, 90 min ON, 30 min OFF, 1000 Hours
40°C, 90 - 95%RH,DC 0.1W, 1000 Hours
-55°C, 30 min, +155°C, 30 min, 5 cycles
250 ± 5°C, 3 seconds
230 ± 5°C, 3 seconds
Between Terminals and Tab
10 - 220
E24
50
±1%
TEST CONDITIONS
-55°C to +25°C Flange Temperature
Without Heatsink
Resistor Hotspot to Flange
Up to 51K
also available
and 5.0
Including 2.5
For -55°C to +155°C
Notes:
1. Electrically isolated metal tab.
2. Contact Factory for custom products, non-standard values and tolerances
3. Current Rating: 25A Maximum.
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
MODEL SMHP
SMHP Series
OBSOLETE
Dimensions (mm)
SMHP
A
B
C
D
E
F
G
H
J
K
L
M
10.1
10.3
4.5
5.0
2.2
2.5
2.75
0.5
0.75
1.5
5.08
1.5
± 0.2
± 0.2
± 0.2
± 1.0
± 0.2
± 0.5
± 0.2
± 0.05
± 0.05
± 0.05
± 0.10
± 0.05
Tape Dimensions & Orientation
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
MODEL SMHP
SMHP Series
OBSOLETE
Temperature Rise
Derating Curve
FR4 Thermal PCB Characterisation
Pad Dimensions (x,y mm)
50,40
45,35
40,30
35,25
20,10
P
90°C, 35µm
(W)
4.5
4
3.5
3
2
Notes:
Characterisation carried out using 35µm PCB Copper pad weights, with the temperature of 90°C used as a maximum
reference on the PCB. P90°C, 35µm (W) is power when the measurement point reaches 90°C.
Ordering Information
SMHP 20 500 F T13
Model
Resistance Code:
0.1 : 0R100
50 : 500
First two digits significant, last digit denotes
number of trailing zeros
Tape & Reel:
13” Reel (500 pcs per reel)
Tolerance:
J = 5% Tolerance
F = 1% Tolerance
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
SMHP25 Series
Power Resistor
OBSOLETE
SMHP25 Series
·
·
·
·
·
·
245°C reflow compatible
TO-263 housing
Low inductance and capacitance for
high frequency circuits
25W power rating
High stability film resistance elements
RoHS compliant
IRC’s SMHP series resistors satisfy demanding applications for accurate
and stable power resistors housed in the convenient TO-263 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 metal back plate. 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
25W
1
2
3
2.5W
500 V
3.3°C/W
0.1Ω
10Ω
±1%, ±5%
See Chart
<10nH
<2pF
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
Temperature Rise Data
120
100
Resistor Film Temp Rise with Respect to Tab Temp
Typical TCR For Low Values
TCR (ppm/°C) 0 to 100°C
250
T
film
(°C)
80
60
40
20
200
150
100
50
0.01
0.1
1.0
0
0
5
10
Resistance (Ohms)
15
20
Power (Watts)
25
30
35
Pulse Energy Durability
10K
Power Derating Data
100
Pulse Peak (Watts)
1K
% of Rated Power
Damage Level
50
100
Safety Zone
10
10µ
10
100µ
1m
10m
100m
25°
Pulse Width (seconds)
Tab Temperature (°C)
155°
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
10. 11
SMHP25 Series
Power Resistor
SMHP25 Series
OBSOLETE
N
G
Q
R
B
Physical Data
Dim
A
B
E
F
M
L
K
A
C
10.0
Case, Epoxy UL94-V0
Leads, Sn Plated Cu
Leads Joint, Solder
Resistor, Ni-Cr or RuO
Substrate, Alumina
Joint, Solder
Tab, Matte Sn Plated Cu
In (nom)
0.398
0.406
0.177
0.197
0.098
0.087
0.108
0.020
0.030
0.059
0.200
0.059
0.291
0.325
0.100
mm
10.1 ±0.2
10.3 ±0.2
4.5 ±0.2
5.0 ±1.0
2.5 ±0.5
2.2 ±0.2
2.75 ±0.2
0.5 ±0.05
0.75 ±0.05
1.5 ±0.05
5.08 ±0.1
1.5 ±0.05
7.4 ±0.1
8.3 ±0.2
2.5 ±0.2
C
E
J
H
P
F
11.0
G
H
16.0
J
K
3.50
1.60
5.08
L
M
N
P
Q
R
Insulated Between Tab and Resistor
Recommended minimum footprint dimensions.
All dimensions are in millimeters (mm).
Lead & Tab Material
Part Weight
Tin Plated Copper
1.5g
Environmental Data
Test
Load Life
Humidity
Temperature Cycle
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
5 cycles; 30 minutes @ -55°C, 30 minutes at +155°C
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)
±(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
10. 11
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