Approval sheet

Page 3 of 7

WR18-20-25X(W)_V17

DEC - 2016

QUICK REFERENCE DATA

Item

General Specification

Series No.

WR18X(W)

WR20X(W)

WR25X(W)

Size code

1218(3248)

2010 ( 5025 ),

2512(6432)

Resistance Tolerance

5% (E24); 1% (E24+E96)

Resistance Range

1

 ~ 10M, Jumper (0)

TCR (ppm/

C) : 10< Rn  10M

1

 Rn  10

 100 ppm/C

 100 ppm/C

 100 ppm/C

 200 ppm/C

 200 ppm/C

 200 ppm/C

1W

0.75 W

1W

Max. Operation Voltage (DC or RMS)

200V

200V

250V

Max. Overload Voltage (DC or RMS)

400V

400V

500V

Operation temperature

-55 ~ +155

’C

Storage temperature

5 ~ 40

’C

Test conditions for jumper ( 0 ohm )

Type

WR18X(W)

WR20X(W)

WR25X(W)

Power Rating At 70C

1 W

3/4 W

1 W

Resistance

Max. 50mR

Max. 50mR

Max. 50mR

Rated Current

4.5 A

3.8 A

4.5 A

Peak Current

11 A

9 A

11 A

Operating Temperature

-55C ~ 155C

-55C ~ 155C

-55C ~ 155C

Note :

1.

This is the maximum voltage that may be continuous

ly supplied to the resistor element, see “IEC publication

60115-

8”

2.

Max. Operation Voltage : So called RCWV (Rated Continuous Working Voltage) is determined by

Value

Resistance

Power

Rated

RCWV





or Max. RCWV listed above, whichever is lower.

3.

Max. Operation Current : So called RCWC (Rated Continuous Working Current) is determined by

4.

Value

Resistance

/

Power

Rated

RCWC 

MECHANICAL DATA (unit : mm)

TYPE

WR18

WR20

WR25

L

3.05

0.15

5.00

0.20

6.40

0.20

W

4.60

0.20

2.50

0.20

3.20

0.20

T

0.55

0.10

0.55

0.10

0.60

0.10

Tt

0.45

0.25

0.65

0.25

0.65

0.25

Tb

0.50

0.25

0.60

0.25

0.90

0.25