NTC Chip Thermistor


Applications:

  • Temperature Sensing                                         

  • Temperature Compensation                              

Features 

  • Top and Bottom Terminations

  • Solid State Ceramic Composition  

PHYSICAL  SPECIFICATIONS

wpe1.jpg (6324 bytes)

SPECIFICATION  TABLE

Part Number

W @ 25 °C     +/- 10%

Curve

  TCR    @ 25 °C (%/°C)

Dimensions in inches (millimeters)

A  

B 

C    

+/- 0.012" (0.30mm) +/-0.012" (0.30mm)
+/- 0.012" (0.30mm)

WR210

50

D

-3.3

0.075 (1.91)

0.075 (1.91)

0.030 (0.76)

WR220

70

D

-3.3

0.070 (1.91)

0.070 (1.91)

0.030 (0.76)

WR225

80

D

-3.3

0.067 (1.70)

0.067 (1.78)

0.030 (0.76)

WR235

100

D

-3.3

0.065 (1.65)

0.065 (1.65)

0.035 (0.89)

WR245

150

D

-3.3

0.052 (1.32)

0.052 (1.32)

0.035 (0.89)

WR255

200

D

-3.3

0.045 (1.14)

0.045 (1.14)

0.035 (0.89)

WR265

300

D

-3.3

0.037 (0.94)

0.037 (0.94)

0.035 (0.89)

WR270

300

A

-3.9

0.110 (2.79)

0.110 (2.79)

0.030 (0.76)

WR280

500

A

-3.9

0.085 (2.16)

0.085 (2.16)

0.030 (0.76)

WR290

700

A

-3.9

0.070 (1.78)

0.070 (1.78)

0.030 (0.76)

WR295

800

A

-3.9

0.067 (1.70)

0.067 (1.70)

0.030 (0.76)

WR305

1000

A

-3.9

0.060 (1.52)

0.060 (1.52)

0.030 (0.76)

WR315

1500

A

-3.9

0.050 (1.27)

0.050 (1.27)

0.030 (0.76)

WR325

2000

A

-3.9

0.045 (1.14)

0.045 (1.14)

0.035 (0.89)

WR330

2500

A

-3.9

0.040 (1.02)

0.040 (1.02)

0.035 (0.89)

WR340

2500

B

-4.4

0.100 (2.54)

0.100 (2.54)

0.030 (0.76)

WR345

3000

B

-4.4

0.090 (2.29)

0.090 (2.29)

0.030 (0.76)

WR350

5000

B

-4.4

0.070 (1.78)

0.070 (1.78)

0.030 (0.76)

WR360

10000

B

-4.4

0.050 (1.27)

0.050 (1.27)

0.030 (0.76)

WR370

20000

B

-4.4

0.038 (0.97)

0.038 (0.97)

0.035 (0.89)



Options:  

    • Tape and Reeling

    • Special Resistance Values

    • Optional Electrode Materials (Pd-Ag, etc.) 

    • Resistance Tolerance:  +/- 5%  available (add -5 to part number)  

    • example: WM105K502-5

    Terminology

    • TCR (Temperature Coefficient of Resistance) - Defined as a slope parameter using the following equation:  TCR = 1/Rt [(dRt)/(dT)]




Copyright 2008 WECC | All Rights Reserved   Home | Company Overview | Product Info | Contact Us

Factory Direct
Technical Sales - sales@wecc.com Design/Engineering - mrazeggi@wecc.com General Inquiries - info@wecc.com
Western Electronic Components © 2008
521-A Spectrum Circle Oxnard, CA 93030  (805) 988-9888