SMHP35 Series
Power Resistor
SMHP35 Series
•
•
•
•
•
•
270°C reflow compatible
TO-263 housing
Low inductance and capacitance for high frequency circuits
35W 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
35W
2
Free Air
2.5W
3
Voltage
Rating
4
Thermal
Resistance
Resistance
Range
Min
0.01Ω
0.1Ω
10Ω
Max
0.09Ω
9.1Ω
51KΩ
Tolerances
±5%
±1%, ±5%
±1%, ±5%
Nominal
Resistance
Series
5
E6
E12
E24
Typ. TCR
(ppm/°C)
6
±250
±100
±50
Inductance
Capacitance
500 V
3.3°C/W
<10nH
<2pF
Maximum current 25 amps
Power rating based on 25°C case temperature
3
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
6
See TCR Chart for resistance values below 0.2ohms
1
2
Temperature Rise Data
120
100
∆T
film
(°C)
80
60
40
20
0
0
5
10
15
20
Power (Watts)
25
30
35
Resistor Film Temp Rise with Respect to Tab Temp
Pulse Energy Durability
10K
Power Derating Data
100
Pulse Peak (Watts)
% of Rated Power
100µ
1m
10m
100m
1K
Damage Level
100
Safety Zone
10
1µ
50
10µ
10
25°
Tab Temperature (°C)
155°
Pulse Width (seconds)
General Note
IRC reserves the right to make changes in product specification without notice or liability.
All information is subject to IRC’s own data and is considered accurate at time of going to print.
Advanced Film Division
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
A subsidiary of
TT electronics plc
SMHP35 Series Issue June 2009 R2
SMHP35 Series
Power Resistor
Physical Data
N
G
B
Dim
A
B
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
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
F
M
L
K
A
C
H
11.1
J
E
C
E
F
G
10.16
Case, Epoxy UL94-V0
Leads, Sn Plated Cu
Leads Joint, 85% Pb-Sn Solder
Resistor, Ni-Cr or RuO
Substrate, Alumina
Joint, 85% Pb-Sn Solder
1.60
Tab, Matte Sn Plated Cu
H
J
K
L
16.0
3.50
5.08
Insulated Between Tab and Resistor
M
N
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
Advanced Film Division
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
SMHP35 Series Issue June 2009 R2
SMHP35 Series
Power Resistor
Typical TCR For Low Values
350
Solder Reflow Profile
60-80sec above 217°C
TCR (ppm/°C) 0 to 100°C
250
Temp (°C)
300
250
200
150
100
50
0
400sec to Peak
150-200°C
120-180sec
Peak 20-40sec. at
(240-270°C)
Preheat
200
150
100
50
0
0.01
0.1
Resistance (Ohms)
1.0
0
50 100 150 200 250 300 350 400 450 500 550
Time (sec)
Reel Packaging Data
16.0
5.0±0.2
0.4
2.0
4.0
1.75
Reel Dimensions
Outer Diameter
Inner Diameter
Width
Quantity
10.8
Tolerances are ±0.1mm unless otherwise shown
11.5
24.0±0.3
16.3
15.8
330 mm
100 mm
27.4 mm max
500pcs/reel
Ordering Data
Prefix
Style
TFP - SMHP35LF - 1R50 - J
SMHP35LF = 35W, TO-263 style power resistor
Application Notes:
1. Resistance measurement shall be made at the terminal
foot.
2. Thermal design should satisfy the following equation: Tab
Temperature (T
T
) + [Thermal Resistance (R
qJT
) x Power
applied (Watts)]
≤
155°C over the full operating temperature
of the application.
3. Resistor film temperature is not to exceed 155°C during
operation.
4. This product is RoHS compliant by exemption according to
RoHS directive 2002/95/EC exemptions 5 & 7, as they apply
to lead in glass and internal solder connections.
Resistance Code
4-digit resistance code.
Ex: 0R05 = 0.05Ω, 10R0 = 10Ω, 1K00 = 1KΩ
Absolute Tolerance Code
J = ±5%; F = ±1%
Standard Packaging
RoHS compliant reel (500 pcs per reel)
RoHS compliant tube (50 pcs per tube)
For additional information or to discuss your specific requirements, please contact our
Applications Team using the contact details below.
Advanced Film Division
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
SMHP35 Series Issue June 2009 R2
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