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Heatsink
HeatsinkHeatsink
Heatsink
Mount High Power Resistors
Mount High Power ResistorsMount High Power Resistors
Mount High Power Resistors
WMHP
Series
TO-220 & TO-247 standard power packages
Very low thermal resistance
Non-inductive thick film technology
20 to 100 watt high power resistors
Single screw mounting to heatsink
Suitable for high frequency / fast pulse use
Electrical
Data
WMHP20 WMHP35 WMHP50 WMHP100 Conditions
Package style TO-220
TO
-
247
Power rating
watts
20
3
5
50
100
Heatsink with
25°C flange temperature
Power rating
watts
1.5
2.5
3
3.5
Without heatsink
, in free air 25
°C
Limiting element
voltage
volts
35
0
700
dc or ac rms
Resistance
range
ohms
R0
5
–
10K
Dielectric strength
volts
18
00
a
c
rms
for 60s
Working
temperature range
°C
-
6
5 to 1
50
-
6
5 to 175
Insulation resistance
ohms
>10G
Between terminals and tab
Tolerances
%
≤
1R0: ±5
>1R0:
±1, ±5
TCR
ppm/°C
≤R20:
±
1000 >R20
–
3R0:
±
300 >3R0
-
10R:
±
100
>10R: ±50
25 to 105°C
Standard values
E24
preferred
Performance Data
Physical Data
Dimensions (mm) & Weight (g)
TO
-
220
TO
-
247
A
10.16 ±0.25
15.75
±
0.26
B
14.75
±
0.25
20.7
±
0.26
C
4.44
±
0.38
4.95
±
0.26
D
3.75
±
0.2
3.63
±
0.1
E
13.7
±
1
14.48
±
1.27
F
4 max.
2.79
±
0.76
G
5.08
±
0.25
3.63
±
0.18
H
0.78
±
0.08
1.52
±
0.1
J
1.3
±
0.1
10.16
±
0.26
K
6.1
±
0.25
5.33
±
0.26
L
0.55
±
0.15
0.81
±
0.26
M
2.3
±
0.25
2.41
±
0.26
Wt
2.0
nom.
3.7
nom.
Test Performance
Load at Rated Power:
2000hrs at rated power
±∆R%
1
Short Term Overload:
2 x rated power with applied voltage not to exceed 1.5 x maximum continuous operating voltage for 5 seconds
±∆R%
0.5
Damp Heat with Load:
40 ±2°C, 90 – 95% RH, maximum working voltage 1.5 hours on, 0.5 hours off, 1000 hours
±∆R%
1
Thermal Shock:
-65°C/150°C, 100cycles
±∆R%
0.3
Terminal Strength:
2.4N pull test
±∆R%
0.2
All parts are Pb
-
free and comply with EU Directive 2011/65/EU (RoHS2)
TO
-
220
TO
-
2
47
www.ttelectronicsresistors.com
WMHP
Series
Heatsink
HeatsinkHeatsink
Heatsink
Mount High Power Resistors
Mount High Power ResistorsMount High Power Resistors
Mount High Power Resistors
Temperature Derating
Pulse Performance
Single Pulse (Pmean << Pr) Condition
Typical High Frequency Performance
Ordering Procedure
Example: WMHP35-10KJ (WMHP35 at 10 kilohms ±5%, Pb-free)
W
M
H
P
3
5
-
1
0
K
J
1
2
3
4
1 2 3 4
Type Rating
Value Tolerance
Packing
WMHP
20 3 / 4 characters
R = ohms
K = kilohms
F = ±1% Plastic tubes
TO-220: 50/tube
TO-247: 30/tube
35 J = ±5%
50
100
Pulse performance for durations ≥1s is dependent on mounting conditions. The short term
overload power limit is 2 x power rating for 5s.
Typical high frequency characteristics for WMHP35-220R. Self resonant frequency is 1GHz.
TO
-
220
TO
-
2
47
