14

15

WL Series

Miniature Wirewound

Current Sense

F E A T U R E S

• Ultra-low ohmic value series for

Current Sensing applications

• Very low inductance (<1nH at

1MHz Test)

• Miniaturized dimensions, Better

power to dimension ratios

• Use of the highest quality stan-

dard (96% Alumina) ceramic

core

• Manufacturing process–Wire

winding/Spot Welding–by

Computer Numerical Control

(CNC) machine tools to ensure

consistency of product quality.

• Encapsulated by epoxy molding

compound

• Advanced IC encapsulation

mold/die technologies

D E R A T I N G

Power

Resistance

Rating

Range

Dim. L

Dim. D

Dim. d

Type

(watts)

(Ω)

(mm/in)

(mm/in)

(mm/in)

WLA

0.5

0.005-0.100

5.08 / 0.200 2.54 / 0.100

0.60 / 0.024

WLB

1

0.005-0.100

7.00 / 0.276 3.00 / 0.120

0.60 / 0.024

WLC

2

0.010-0.100

11.4 / 0.450 6.86 / 0.270

0.80 / 0.031

S P E C I F I C A T I O N S

Material

Ceramic Core: CeramTec

End Caps: Stainless steel, preci-

sion formed

Leads: Copper wire, 100% Sn

(Lead Free) coated

CN49W alloy resistance wire TC

±20ppm/°C

Encapsulation: SUMICON 1100/

1200 Epoxy molding compound

for IC encapsulation

Electrical

Standard Tolerance: F (1.0%),

J (5.0%)

Temperature Coefficient

(ppm/°C):

±300ppm/°C for ≤0.03Ω

±100ppm/°C for ≥0.033Ω

Maximum Working Voltage:

√PxR

P E R F O R M A N C E C H A R A C T E R I S T I C S

Test

Conditions Of Test

Performance

Thermal Shock

Rated power applied until thermal stability,

-55°C +0°C,-5°C,15min.

±2.0%

Short-time Overload

5 times rated wattage for 5 seconds

±2.0%

Solderability

Method 208 of MIL-STD-202

±2.0%

Terminal Strength

Pull test:10 pounds, 5 to10 seconds, Twist

test: 1080°,5 second/rotation

±1.0%

Dielectric

Withstanding Voltage

500 Volts rms for 1W. 1 minute

±1.0%

High Temperature

Exposure

Exposed to an ambient temperature of 275

+5/-0°C for 250 ±8 hours,

±5.0%

Moisture Resistance

MIL-STD-202 Method 106, 7b not appli-

cable

±2.0%

Low Temperature

Storage

Cold chamber at a temperature of -65

±2°C for 24 ±4 hours

±2.0%

Vibration, High

Frequency

Frequency varied 10 to 2000Hz, 200G

peak, 2 directions 6 hours each

±1.0%

Load Life

1000/2000 hours at rated power, +25°C,

1.5 hours “On”, 0.5 hours “Off”

±5.0%

O R D E R I N G I N F O R M A T I O N

L

D

0.984 /

25

d

�

�

� � � � � � � � � � �

Series

Ohms

Power

A = 0.5

B = 1

C = 2

Tolerance

F = 1%

J = 5%

Package

T = Tape

blank = 25pc Pack

RoHS compliant

S T A N D A R D P A R T N U M B E R S F O R W L S E R I E S

Wattage:

0.5

1.0

2.0

Series:

WLA

WLB

WLC

Ohms

0.005

WLAR005FE

WLBR005FE

0.01

WLAR01FE

WLBR01FE

WLCR01FE

0.015

WLAR015FE

WLBR015FE

WLCR015FE

0.02

WLAR02FE

WLBR02FE

WLCR02FE

0.025

WLAR025FE

WLBR025FE

WLCR025FE

0.03

WLAR03FE

WLBR03FE

WLCR03FE

0.05

WLAR05FE

WLBR05FE

WLCR05FE

0.10

WLAR10FE

WLBR10FE

WLCR10FE

K E Y T O F I V E - B A N D C O D E

Band

1

2

3

4

5

Color

Digit

Multiplier

Tolerance

Black

0

0

0

x

1Ω

Brown

1

1

1

x

10Ω

±

1% (F)

Red

2

2

2

x

100Ω

±

2% (G)

Orange

3

3

3

x

1KΩ

Yellow

4

4

4

x

10KΩ

Green

5

5

5

x 100KΩ

± 0.5% (D)

Blue

6

6

6

x

1MΩ

± 0.25% (C)

Violet

7

7

7

x 10MΩ

± 0.10% (B)

Grey

8

8

8

± 0.05%

White

9

9

9

x 0.001Ω

Gold

x

0.1Ω

±

5% (J)

Silver

x 0.01Ω

± 10% (K)

�

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100

Ambient Temperature,

°C

60

20

0

80

40

25

50

100

175

75

0

125 150