Product Sheet

V I S H AY I N T E R T E C H N O L O G Y, I N C .
POWER METAL STRIP® RESISTORS
WSHM2818
Power Metal Strip® Resistors, High Power (7 W),
Low Value (Down to 0.001 Ω), Surface Mount
KEY BENEFITS
•
•
•
•
Improved thermal management incorporated into design
The WSHM2818 resistor has 7 W power capability in a small 2818 size package
Very low inductance (< 5 nH)
Very low resistance values (1 mΩ to 100 mΩ)
APPLICATIONS
Automotive:
• Electronic controls (engine controls, climate controls, anti-lock brakes, etc.)
• Brushless DC motor controls (electronic power steering, electric: water pump,
oil pump, air conditioning, etc.)
• Electric and hybrid controls (battery management)
Industrial:
• Oil / gas well drilling (down hole test / measurement equipment)
• Air conditioning / heat pump (inverter control)
Consumer:
• Air conditioning / heat pump (inverter control)
• White goods (inverter control)
Computer:
• DC/DC converter, VRMs for servers
• Power management / safety
RESOURCES
• Datasheet: WSHM2818 - www.vishay.com/doc?30188
• For technical questions contact [email protected]
• Material categorization: For definitions please see www.vishay.com/doc?99912
One of the World’s Largest Manufacturers of
Discrete Semiconductors and Passive Components
PRODUCT SHEET
1/2
VMN-PT0284-1410
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
• Proprietary processing technique produces
extremely low resistance values
I S H AY I N T E R T E C H N O L O G Y, I N C .
• All welded V
construction
• Very low inductance (< 5 nH)
• Solid metal nickel-chrome or ®
manganese-copper 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
POWER METAL STRIP RESISTORS
WSHM2818
Power Metal Strip® Resistors, High Power (7 W),
Note
Low Value (Down to 0.001Flame
Ω),retardance
Surface
Mount
test may not
be applicable to some resistor
(1)
technologies.
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL MODEL
SIZE
POWER RATING
P70 °C
W
TOLERANCE
±%
RESISTANCE
VALUE RANGE

WEIGHT
(typical)
g/1000 pieces
WSHM2818
2818
7 (2)
1.0
0.001 to 0.1
167.8
Note
(2) The WSHM2818 is rated at 7 W with maximum surface temperature of 180 °C.
TECHNICAL SPECIFICATIONS
PARAMETER
Temperature coefficient
UNIT
RESISTOR CHARACTERISTICS
ppm/°C
± 200 for 1 m to 5.99 m
± 75 for 6 m to 100 m
Inductance
nH
<5
Operating temperature range
°C
-65 to +170
Maximum continuous current
A
(P/R)1/2
GLOBAL PART NUMBER INFORMATION
Global Part Numbering: WSHM2818R1000FEA
W
S
H
M
2
RESISTANCE
VALUE
GLOBAL MODEL
WSHM2818
8
L = m*
R = Decimal
4L000 = 0.004 
R0100 = 0.01 
1
8
R
1
0
0
0
F
E
A
TOLERANCE CODE
PACKAGING CODE
SPECIAL
F = ± 1.0 %
J = ± 5.0 %
EA = Lead (Pb)-free, tape/reel
EK = Lead (Pb)-free, bulk
(Dash number)
(up to 2 digits)
From 1 to 99 as
applicable
WSHM2818
* Use “L” for resistance
values < 0.01 
www.vishay.com
Vishay Dale
Revision: 28-Apr-14
Document Number: 30188
1
For technical questions, contact: [email protected]
DIMENSIONS in inches (millimeters)
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
L
H
a
T
b
a
Revision 28-Apr-14
W
MODEL
WSHM2818
RESISTANCE
RANGE

0.001 to 0.1
DIMENSIONS
l
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)
PRODUCT SHEET
Rated Power in %
DERATING
120
100
80
60
2/2
VMN-PT0284-1410
40 NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT
DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
20