Resistors
Surface Mount High Power Resistors
WSMHP Series
TO-263 surface mount package
Very low thermal resistance
Non-inductive, 20, 25 and 35 watt high power resistors
Low profile package for high density PCB installation
Suitable for board mounting with either solder or clip
AEC-Q200 qualified
All parts are Pb-free and comply with EU Directive 2011/65/EU amended by (EU) 2015/863 (RoHS3)
Electrical Data
WSMHP20
Power rating
Power rating
Thermal resistance
Limiting element voltage
Resistance range
Dielectric strength
Working temperature range
Insulation resistance
Tolerances
TCR
Standard values
watts
watts
°C/W
volts
ohms
volts
°C
ohms
%
ppm/°C
20
WSMHP25
25
2.5
3.3
500
0R5 – 100K
2000
-55 to 175
>10G
≤1R0: ±5 >1R0: ±1, ±5
≤3R0: ±300 >3R0-10R: ±100 >10R: ±50
E24 preferred
25 to 105°C
Between terminals and tab
dc for 60s
WSMHP35
35
Without heatsink
Resistor hotspot to flange
dc or ac rms
Conditions
Heatsink with 25°C flange temperature
Physical Data
Dimensions (mm) & Weight (g)
A
B
C
D
E
F
G
H
J
K
L
M
O
P
Q
T
Wt
10.1 ±0.3
10.1 ±0.3
4.6 ±0.2
5.0 ±1
1.27 ±0.3
2.54 ±0.5
3.2 ±0.2
0.43 ±0.07
0.88 ±0.12
1.32 ±0.15
5.08 ±0.1
1.35 ±0.1
1.5 ±0.5
2.54 ±0.1
6.9 ±0.3
6.0 ±1
1.5 nom.
0.13MAX
0.13MAX
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.
BI Technologies IRC Welwyn
www.ttelectronics.com/resistors
© TT Electronics plc
05.21
Surface Mount High Power Resistors
Surface Mount High Power Resistors
WSMHP
Series
WSMHP
Series
Performance Data
Performance Data
Load at Rated Power:
2000hrs at rated power
Load at Rated Power:
2000hrs at rated power
Short Term Overload:
2 x rated power with applied voltage not to exceed 1.5 x maximum continuous operating voltage for 5 seconds
Short Term Overload:
2 x rated power with applied voltage not to exceed 1.5 x maximum continuous operating voltage for 5 seconds
High Temperature Exposure:
MIL-STD-202 method 108, at 175°C for 1000hrs, no load
High Temperature Exposure:
MIL-STD-202 method 108, at 175°C for 1000hrs, no load
Temperature Cycling:
JESD22 method JA-104, -55°C/175°C, 1000cycles
Temperature Cycling:
JESD22 method JA-104, -55°C/175°C, 1000cycles
Biased Humidity:
MIL-STD-202 method 103, 1000hrs 85°C/85% RH, 10% of operating power
Biased Humidity:
MIL-STD-202 method 103, 1000hrs 85°C/85% RH, 10% of operating power
Mechanical Shock:
MIL-STD-202 method 213
Mechanical Shock:
MIL-STD-202 method 213
Vibration:
MIL-STD-202 method 204, peak acceleration
for 20min, 12 cycles each of 3
3 orientations, 10-2000Hz
Vibration:
MIL-STD-202 method 204, peak acceleration 5g
5g for 20min, 12 cycles each of
orientations, 10-2000Hz
Resistance to Soldering Heat:
JIS-C-5201-1 4.18 IEC 60115-1 4.18, 260±5°C for 10
10 seconds
Resistance to Soldering Heat:
JIS-C-5201-1 4.18 IEC 60115-1 4.18, 260±5°C for
seconds
HBM ESD:
AEC-Q200-002, human body 25kV (AD)
HBM ESD:
AEC-Q200-002, human body 25kV (AD)
Solderability:
J-STD-002, 240±5°C for 3
3 seconds
Solderability:
J-STD-002, 240±5°C for
seconds
Moisture Resistance:
MIL-STD-202 method 106, 10
10 cycles, 24hours
Moisture Resistance:
MIL-STD-202 method 106,
cycles, 24hours
Bending Strength:
AEC-Q200-005, Bending 2mm for 60 seconds
Bending Strength:
AEC-Q200-005, Bending 2mm for 60 seconds
Terminal Strength:
AEC-Q200-006, 1.8Kg for 60
60 seconds
Terminal Strength:
AEC-Q200-006, 1.8Kg for
seconds
Test
±∆R%
±∆R%
±∆R%
±∆R%
±∆R%
±∆R%
±∆R%
±∆R%
±∆R%
±∆R%
±∆R%
±∆R%
±∆R%
±∆R%
±∆R%
±∆R%
±∆R%
±∆R%
±∆R%
±∆R%
±∆R%
±∆R%
±∆R%
±∆R%
Performance
1
1
0.3
0.3
0.25
0.25
0.3
0.3
0.5
0.5
0.5
0.5
0.2
0.2
0.5
0.5
1
1
≥90% coverage
≥90% coverage
0.5
0.5
0.25
0.25
0.2
0.2
Pulse performance for durations ≥1s is dependent on mounting conditions. The short term
overload power limit is 2 x power rating for 5s.
Temperature Derating
Typical Thermal Performance on FR4 Pad Heatsink
Dim. x, y
50, 40
45, 35
40, 30
35, 25
20, 10
P
90°C, 35µm
(W)
4.5
4
3.5
3
2
Characterisation carried out using 35µm PCB copper pad weights, with temperature of 90°C used as a
maximum reference on the PCB. P
90°C, 35µm
(W) is power when the measurement point reaches 90°C.
Pulse Performance
Single Pulse (P
mean
<< P
r
) Condition
Typical High Frequency Performance
Typical high frequency characteristics for WSMHP35-220R. Self resonant frequency is 1GHz.
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.
BI Technologies IRC Welwyn
www.ttelectronicsresistors.com
www.ttelectronics.com/resistors
05.21
© TT Electronics plc
Surface Mount High Power Resistors
Surface Mount High Power Resistors
WSMHP Series
WSMHP Series
Packing
Packing
WSMHP components are packed on 330mm diameter reels, with 100mm inner diameter, in tape of width 24mm and with a quantity of 500 pieces per reel.
WSMHP components are packed on 330mm diameter reels, with 100mm inner diameter, in tape of width 24mm and with a
The dimensions of the tape and orientation of the component are as shown below.
quantity of 500 pieces per reel. The dimensions of the tape and orientation of the component are as shown below.
Ordering Procedure
Example: WSMHP35-10KJ
(WSMHP35 at 10 kilohms ±5%, Pb-free)
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.
BI Technologies IRC Welwyn
www.ttelectronicsresistors.com
www.ttelectronics.com/resistors
© TT Electronics plc
05.21
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