WSHM2818 Datasheet

WSHM2818
www.vishay.com
Vishay Dale
Power Metal Strip® Resistors, High Power (7 W)
Low Value (down to 0.001 Ω), Surface Mount
FEATURES
• Improved thermal management incorporated
into design
• Ideal for all types of current sensing, voltage
division and pulse applications including
switching
and
linear
power
supplies,
instruments, power amplifier
• Proprietary processing technique produces
extremely low resistance values
• All welded construction
• Very low inductance (< 5 nH)
• Solid metal nickel-chrome or manganesecopper alloy resistive element with low TCR (< 20 ppm/°C)
• Excellent frequency response to 50 MHz
• Low thermal EMF (< 3 μV/°C)
• AEC-Q200 qualified (1)
• Material categorization: for definitions of compliance
please see www.vishay.com/doc?99912
Note
(1) Flame retardance test may not be applicable to some resistor
technologies.
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL MODEL
SIZE
WSHM2818
RESISTANCE VALUE RANGE
Ω
POWER RATING
P70 °C
W
Tol. ± 0.5 %
Tol. ± 1.0 %
WEIGHT
(typical)
g/1000 pieces
7 (2)
0.010 to 0.1
0.001 to 0.1
167.8
2818
Note
(2) The WSHM2818 is rated at 7 W with maximum surface temperature of 180 °C.
GLOBAL PART NUMBER INFORMATION
Global Part Numbering: WSHM2818R1000FEA
W
S
H
GLOBAL MODEL
WSHM2818
M
2
8
RESISTANCE
VALUE
L = mΩ*
R = Decimal
4L000 = 0.004 Ω
R0100 = 0.01 Ω
1
8
R
1
0
0
0
F
E
A
TOLERANCE CODE
PACKAGING CODE (3)
SPECIAL
D = ± 0.5 %
F = ± 1.0 %
EA = Lead (Pb)-free, tape/reel
EK = Lead (Pb)-free, bulk
(Dash number)
(up to 2 digits)
From 1 to 99 as
applicable
* Use “L” for resistance
values < 0.01 Ω
Note
(3) Packaging code: EB (lead (Pb)-free) and TB (tin / lead) are non-standard packaging codes designating 1000 piece reels. These non-standard
packaging codes are identical to our standard EA (lead (Pb)-free) and TA (tin / lead), except that they have a package quantity of 1000 pieces.
Revision: 11-Jan-16
Document Number: 30188
1
For technical questions, contact: [email protected]
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
WSHM2818
www.vishay.com
Vishay Dale
TECHNICAL SPECIFICATIONS
PARAMETER
Component temperature coefficient (including terminal)
(1)
Element TCR (2)
UNIT
RESISTOR CHARACTERISTICS
ppm/°C
± 200 for 1 mΩ to 5.99 mΩ, ± 75 for 6 mΩ to 100 mΩ
ppm/°C
< 20
Inductance
nH
<5
Operating temperature range
°C
-65 to +170
Maximum working voltage (3)
V
(P/R)1/2
Notes
(1) Component TCR - total TCR that includes the TCR effects of the resistor element and the copper terminal.
(2) Element TCR - only applies to the alloy used for the resistor element; refer to item 1 in the construction illustration on the following page.
(3) Maximum working voltage - the WSHM is not voltage sensitive, but is limited by power / energy dissipation and is also not ESD sensitive.
DIMENSIONS in inches (millimeters)
L
H
a
T
b
l
W
a
Note
• 3D models available: www.vishay.com/ppg?30188.
MODEL
WSHM2818
RESISTANCE
RANGE
Ω
0.001 to 0.1
DIMENSIONS
SOLDER PAD DIMENSIONS
L
W
H
T
a
b
l
0.280 ± 0.010
(7.1 ± 0.25)
0.180 ± 0.010
(4.6 ± 0.25)
0.059 ± 0.010
(1.50 ± 0.25)
0.125 ± 0.010
(3.18 ± 0.25)
0.138
(3.5)
0.200
(5.1)
0.024
(0.61)
Rated Power in %
DERATING
120
100
80
60
40
20
0
- 65 - 50
Revision: 11-Jan-16
- 25
0
25
50
75
100
125 150 170
Ambient Temperature in °C
70
Document Number: 30188
2
For technical questions, contact: [email protected]
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
WSHM2818
www.vishay.com
Vishay Dale
PERFORMANCE
TEST
CONDITIONS OF TEST
TEST LIMITS
Thermal shock
-55 °C to +150 °C, 1000 cycles, 15 min at each extreme
± 0.5 % ΔR
Short time overload
4x rated power for 5 s
± 1.0 % ΔR
Low temperature operation
-65 °C for 45 min
± 0.5 % ΔR
High temperature exposure
1000 h at +170 °C
± 1.0 % ΔR
Bias humidity
+85 °C, 85 % RH, 10 % bias, 1000 h
± 0.5 % ΔR
Mechanical shock
100 g’s for 6 ms, 5 pulses
± 0.5 % ΔR
Vibration
Frequency varied 10 Hz to 2000 Hz in 1 min, 3 directions, 12 h
± 0.5 % ΔR
Load life
1000 h at 70 °C, 1.5 h “ON”, 0.5 h “OFF”
± 1.0 % ΔR
Resistance to solder heat
+260 °C solder, 10 s to 12 s dwell, 25 mm/s emergence
± 0.5 % ΔR
Moisture resistance
MIL-STD-202, method 106, 0 % power, 7b not required
± 0.5 % ΔR
PACKAGING
REEL
MODEL
WSHM2818
TAPE WIDTH
DIAMETER
PIECES/REEL
CODE
16 mm/embossed plastic
330 mm/13"
3500
EA
Note
• Embossed Carrier Tape per EIA-481.
ADDITIONAL RESOURCES
Video: Power Metal Strip
Short Time Overload
Revision: 11-Jan-16
www.vishay.com/videos/resistors/power-metal-strip174-resistor-short-time-overload-product-demo
Document Number: 30188
3
For technical questions, contact: [email protected]
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
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www.vishay.com
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Revision: 02-Oct-12
1
Document Number: 91000