Datasheet WSHP2818 Specification

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Power Metal Strip® Resistors, High Power (10 W),

Low Value (Down to 0.001 Ω), Surface-Mount

FEATURES

• Improved thermal management incorporated into design

• All welded construction of the Power Metal Strip resistors are ideal for all types of current sensing, voltage division, and pulse applications

• Proprietary processing technique produces extremely low resistance values

• Sulfur resistance by construction that is unaffected by high sulfur environments

• Very low inductance (< 5 nH)

• Low thermal EMF (< 3 μV/°C)

LINKS TO ADDITIONAL RESOURCES

Notes

• Follow link to Overview of Automotive Grade Products for more details: www.vishay.com/doc?49924

(1)

Flame retardance test may not be applicable to some resistor technologies

• Solid metal nickel-chrome or manganese-copper alloy resistive element with low TCR (< 20 ppm/°C)

• AEC-Q200 qualified

(1)

• PATENT(S): www.vishay.com/patents

• Material categorization: for definitions of compliance please see

www.vishay.com/doc?99912

WSHP2818

Vishay Dale

STANDARD ELECTRICAL SPECIFICATIONS

POWER RATING

GLOBAL MODEL SIZE

WSHP2818 2818 10

Note

(1)

The WSHP2818 is rated at 10 W with maximum surface temperature of 200 °C based on 70 °C ambient temperature

70 °C

(1)

RESISTANCE VALUE RANGE

TOL. ± 0.5 % TOL. ± 1.0 %

0.010 to 0.1 0.001 to 0.1 167.8

WEIGHT

(typical)

g/1000 pieces

GLOBAL PART NUMBER INFORMATION

Global Part Numbering: WSHP2818R1000FEA (visit www.vishay.net Vishay Dale parts numbering manual for all options)

W S H P 2 8 1 8 R 1 0 0 0 F E A

GLOBAL MODEL

(8 digits)

WSHP2818 L = mΩ*

Notes

• SMD Power Metal Strip marking (www.vishay.com/doc?30327)

(1)

EB (lead (Pb) free) is a non-standard packaging code designated for 1000 piece reels. The non-standard packaging code is identical to our standard EA (lead (Pb) free), except that it has a package quantity of 1000 pieces

RESISTANCE VALUE

(5 digits)

R = decimal

4L000 = 0.004 Ω

R0100 = 0.01 Ω

* Use “L” for resistance

values < 0.01 Ω

TOLERANCE CODE

(1 digit)

D = ± 0.5 % F = ± 1.0 %

PACKAGING CODE

(2 digits)

EA = lead (Pb)-free, tape/reel (dash number)

(1)

SPECIAL

(up to 2 digits)

from 1 to 99 as

applicable

PATENT(S): www.vishay.com/patents This Vishay product is protected by one or more United States and international patents.

Revision: 14-Feb-2022

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

Document Number: 30347

Page 2

WSHP2818

www.vishay.com

TECHNICAL SPECIFICATIONS

PARAMETER UNIT RESISTOR CHARACTERISTICS

(4)

± 200

Component temperature coefficient (including terminal)

Element TCR

(2)

(1)

ppm/°C

ppm/°C < 20

for 1 mΩ to 5.99 mΩ

(4)

± 75

for 6 mΩ to 100 mΩ

Inductance nH < 5

Operating temperature range °C -65 to +170

Maximum working voltage

(3)

V(P x 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 WSHP is not voltage sensitive, but is limited by power / energy dissipation and is also not ESD sensitive

(4)

Typical TCR is positive, for more details contact factory

DIMENSIONS in inches (millimeters)

Vishay Dale

Notes

• 3D models available: www.vishay.com/doc?30349

• Surface-mount solder profile recommendations: www.vishay.com/doc?31052

MODEL

RANGE

WSHP2818 0.001 to 0.1

RESISTANCE

LWHTabl

0.280 ± 0.010 (7.1 ± 0.25)

DIMENSIONS SOLDER PAD DIMENSIONS

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)

TYPICAL SENSING LAYOUT SENSING WITH VIA LAYOUT (best performance)

abc l

0.138 (3.51)

0.210 (5.33)

0.020 (0.51)

0.024 (0.61)

abde f l

0.143 (3.63)

0.210 (5.33)

0.026 (0.66)

0.105 (2.67)

Ø 0.020

(0.50)

0.024 (0.61)

Note

• Sensing locations are based on the construction of the part; terminals are wrapped from the outside to underneath. These options place the sensing location nearest the temperature stable resistance element, which minimizes contact resistance and optimizes TCR

Revision: 14-Feb-2022

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

For technical questions, contact: [email protected]

Document Number: 30347

Page 3

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DERATING PULSE CAPABILITY

WSHP2818

Vishay Dale

120

100

2nd line

Rated Power (%)

-65 -50 -25 0 25 50 100 125 150 170

Axis Title

Ambient Temperature (°C)

10000

1000

100

1st line

2nd line

www.vishay.com/resistors/power-metal-strip-calculator

PERFORMANCE

TEST CONDITIONS OF TEST TEST LIMITS

Thermal shock -55 °C to +150 °C, 2000 cycles, 15 min at each extreme ± 0.5 %

Short time overload

Low temperature operation -65 °C for 24 h ± 0.5 %

High temperature exposure 2000 h at +170 °C ± 1.0 %

Bias humidity +85 °C, 85 % RH, 10 % bias, 1000 h ± 0.5 %

Mechanical shock 100 g’s for 6 ms, 5 pulses ± 0.5 %

Vibration Frequency varied 10 Hz to 2000 Hz in 1 min, 3 directions, 12 h ± 0.5 %

Load life 2000 h at 70 °C, 1.5 h “ON”, 0.5 h “OFF” ± 1.0 %

Resistance to solder heat +260 °C solder, 10 s to 12 s dwell, 25 mm/s emergence ± 0.5 %

Moisture resistance MIL-STD-202, method 106, 0 % power, 7b not required ± 0.5 %

Refer to link for short time overload performance and pulse capability;

www.vishay.com/resistors/power-metal-strip-calculator/

± 1.0 %

PACKAGING

MODEL

WSHP2818 16 mm/embossed plastic 330 mm / 13" 3500 EA

Notes

• Embossed carrier tape per EIA-481

• Additional packaging details at www.vishay.com/doc?20051

TAPE WIDTH DIAMETER PIECES/REEL CODE

ADDITIONAL RESOURCES

Video: Power Metal Strip Short Time Overload

Revision: 14-Feb-2022

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

www.vishay.com/videos/resistors/vishay-dale-power-metal-strip174-wshmwshp.html

For technical questions, contact: [email protected]

REEL

Document Number: 30347

Page 4

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Revision: 01-Jan-2023

Document Number: 91000