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KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com

Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.

12/31/08

NT73

negative tempco thermistor

features

and 2B black three digit on pink body color

requirements. Pb located in glass material, electrode

and resistor element is exempt per Annex 1, exemption

5 of EU directive 2005/95/EC

For further information on packaging,

please refer to Appendix A.

ordering information

J: ±5%

K: ±10%

L: ±15%

3200

3500

3700

3800

3950

4100

T: Sn

(Other termination

styles may be

available, please

contact factory

for options)

2 significant

figures + 1

multiplier

1J: 0603

2A: 0805

2B: 1206

TD: 7"

paper tape

(5,000

pieces/reel)

NT73

Type

B Constant

Nominal

Size

Code

Nominal

Resistance

Resistance

Tolerance

Termination

Material

Packaging

New Part #

2A

TD

103

K

T

3800

Protective

Coating

Inner

Electrode

Resistive

Film

Ceramic

Substrate

Solder

Plating

Ni

Plating

L

c

c

W

t

d

dimensions and construction

L

-.004

-0.1

-.004

-0.1

.063±.008

(1.6±0.2)

.031±.004

(0.8±0.1)

.012±.004

(0.3±0.1)

.012±.004

(0.3±0.1)

.02±.004

(0.5±0.1)

.016±.008

(0.4±0.2)

.049±.004

(1.25±0.1)

.079±.008

(2.0±0.2)

2A

(0805)

-.004

-0.1

.024±.004

(0.6±0.1)

.02±.008

(0.5±0.3)

.063±.008

(1.6±0.2)

.126±.008

(3.2±0.2)

2B

(1206)

Wc

d

t

Dimensions inches

(mm)

Type

1J

(0603)

(Inch Size Code)

H: ±3%

J: ±5%

K: ±10%

B Constant

Tolerance

J

6.8k

Ω

10k

Ω

15k

Ω

10k

Ω

20k

Ω

22k

Ω

30k

Ω

33k

Ω

47k

Ω

68k

Ω

100k

Ω

47k

Ω

Part

Designation

Resistance

@ 25°C

Resistance

Tolerance

applications and ratings

B Constant

Tolerance

B Constant

@ 25°C/75°C

Operating

Temperature

Range

Power

Rating

(mW)

NT731J

5

±5%

±5%

±3%

3500K

3800K

3800K

J: ±5%

K: ±10%

4100K

3700K

±3%

±10%

-55°C

to

+125°C

EU

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