3T3900A2 [VISHAY]

RESISTOR, TEMPERATURE DEPENDENT, NTC, 390 ohm, CHASSIS MOUNT, RADIAL LEADED;


型号：	3T3900A2
厂家：	VISHAY
描述：	RESISTOR, TEMPERATURE DEPENDENT, NTC, 390 ohm, CHASSIS MOUNT, RADIAL LEADED
文件：	总4页 (文件大小：48K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

M, C, T

Vishay Dale

NTC Thermistors,Coated

FEATURES

• Small size - conformally coated.

• Wide resistance range.

• Available in 11 different R-T curves.

DESCRIPTION

Models M, C, and T are conformally coated, leaded

thermistors for standard PC board mounting or assembly in

probes. The coating is baked-on phenolic for durability and

long-term stability. Models M and C have tinned solid copper

leads.

Model T has solid nickel wires with Teflon^®insulation to

provide isolation when assembled in metal probes or

housings.

DIMENSIONS in inches [millimeters]

1/4 NOM.

TEFLON INSULATED NICKEL WIRE

TINNED COPPER WIRE

BODY DIA.

MAX.

BODY DIA.

MAX.

24 ± 0.5 [609.6 ± 12.7]

1.5 [36.1] MIN.

CLEAN LEAD LENGTH

LD DIAMETER

Type M

WIRE SIZE

AWG 30: 0.0100 [0.254]

AWG 28: 0.0126 [0.320]

AWG 30: 0.0100 [0.254]

Type C

Type T

ORDERING INFORMATION

2001

CURVE NUMBER

MODEL

VALUE

TOLERANCE

First three digits are

significant. The last

digit is the multiplier.

(2000 ohm is illustrated.)

Point Match Tolerances

Curve Track Tolerances

F = ± 1%

G = ± 2%

H = ± 3%

J = ± 5%

@ 25°C

A3 = ± 1°C

0°C to + 70°C

B3 = ± 0.5°C 0°C to + 70°C

C3 = ± 0.2°C 0°C to + 70°C

A2 = ± 1°C

- 20°C to + 50°C

K = ± 10% @ 25°C

B2 = ± 0.5°C - 20°C to + 50°C

C2 = ± 0.2°C - 20°C to + 50°C

A4 = ± 1°C

B4 = ± 0.5°C 0°C to + 100°C

A5 = ± 1°C + 25°C to + 90°C

0°C to + 100°C

B5 = ± 0.5°C + 25°C to + 90°C

C5 = ± 0.2°C + 25°C to + 90°C

See following pages for Tolerance

explanation and details

A8 = ± 1°C

0°C to + 50°C

B8 = ± 0.5°C 0°C to + 50°C

C8 = ± 0.2°C 0°C to + 50°C

www.vishay.com

Document Number: 33003

Revision 11-Feb-02

For technical questions, contact thermistor1@vishay.com

M, C, T

NTC Thermistors, Coated

Vishay Dale

SELECTION GUIDE FOR TYPE M, C, AND T THERMISTORS

R₂₅

CURVE NUMBER

(Ohms)

MAXIMUM BODY DIAMETER

0.125 [3.2]

0.110 [2.8]

0.095 [2.4]

100

120

150

180

220

270

330

390

470

500

DISSIPATION CONSTANT

2 - 3 mWatts/°C

560

680

820

THERMAL TIME CONSTANT

6 - 14 Seconds

1.2K

1.5K

1.8K

2.2K

2.7K

3.3K

3.9K

4.7K

5.6K

6.8K

8.2K

10K

12K

15K

18K

22K

27K

33K

39K

47K

50K

56K

68K

82K

100K

120K

150K

180K

220K

270K

330K

390K

470K

500K

560K

680K

820K

1 Meg

NOTE:

1. Intermediate resistance values between

the standard value series are available.

Size would be the same as the color

grouping.

2. Other body diameters available. Bead

diameter increases as Res. decreases.

(Consult Factory)

3. Leaded series of thermistors includes

additional styles: (Consult Factory)

Type B: 26AWG lead, .0159 [.40]

Type F: 32AWG lead, .008 [ .20]

Type E: 24AWG lead, .020 [ .51]

Type D: 22AWG lead, .025 [.64]

Type G: 20AWG lead, .032 [ .81]

Type H: 18AWG lead, .040 [1.02]

Document Number: 33003

Revision 11-Feb-02

www.vishay.com

For technical questions, contact thermistor1@vishay.com

M, C, T

NTC Thermistors, Coated

Vishay Dale

TOLERANCES AVAILABLE FOR TYPE M, C AND T THERMISTORS

Description of Thermistor Tolerances

The many applications of thermistors have mandated the need for two basic tolerance schemes for these products - Curve

Tracking and Point Match Thermistors. An example of the resistance tolerance at various temperatures for the two different

tolerancing methods is described in the following graph:

± 5% POINT MATCH CURVE

25°C

± 1°C CURVE TRACK CURVE

TEMPERATURE (°C)

Curve Tracking Tolerance:

Thermistors are calibrated at the high temperature of the curve track range and then final tested at the low temperature of the

curve track range. This ensures that the thermistor will meet the specified temperature accuracy at every temperature within

the desired temperature range. Several temperature ranges are available and the accuracy of the thermistor may be ± 0.2°C,

± 0.5°C, and ± 1.0°C. The Curve Tracking temperature ranges and their code designators are shown in Figure 1 and Table 1.

To specify, add the appropriate suffix from the following table to the part number.

Example: 1M1002-B3 = Curve 1, 10 kilohms at + 25°C, curve tracking to ± 0.5°C from 0°C to + 70°C

STANDARD ELECTRICAL SPECIFICATIONS FOR CURVE TRACKING THERMISTORS

TEMP. RANGE

TOLERANCE

0°C to + 70°C

0.5 0.2

- 20°C to + 50°C

0.5 0.2

- A2 - B2

0°C to + 100°C

0.5 0.2

- A4 - B4

25°C to + 90°C

0.5 0.2

- A5 - B5

0°C to + 50°C

0.5 0.2

- A8 - B8

°C

PART NO. SUFFIX - A3

- B3

- C3

- C2

- C4

N/A

- C5

- C8

www.vishay.com

Document Number: 33003

Revision 11-Feb-02

For technical questions, contact thermistor1@vishay.com

M, C, T

NTC Thermistors, Coated

Vishay Dale

POINT MATCH TOLERANCE

The standard leaded thermistors are calibrated and tested at 25°C to a tolerance of ± 5% or ± 10%; however, tighter tolerance,

point matched thermistors are readily available as are special point match temperatures to fit your application.

Since these thermistors have only one controlled point of reference ( the point match temperature ), the resistance at other

temperatures is given by the "Resistance VS Temperature Conversion Tables" for the appropriate material curve. The resistance

value at any temperature is the ratio factor times the resistance at 25°C.

Example: 1M1002-5, +70°C resistance = (Resistance factor for curve 1 at 70°C is .1990) X (10000 ohm resistance at 25°C)

= 1990 ohms.

The tolerance of the resistance at any temperature is described by Figure 2.

FIGURE 2

POINT MATCH TOLERANCES VS. TEMPERATURE

Point match resistance tolerances at temperatures other than

MAX. R VS. T

25ºC are not the same as the calibration temperature. This

difference is presented in Figure 2.

MIN. R VS. T

The tolerance at any given temperature is the point match

NOMINAL R VS. T

tolerance + the MT ±% (Manufacturing Tolerance).

The MT ±% may be obtained from the R vs. T Conversion

tables and is added to the point match temperature, i.e., ±

1% Tol. at 25ºC + ± 2.6% at -30ºC for Curve 1 equals a total

tolerance of ± 3.6% at -30ºC.

PIVOT POINT

(CALIBRATION TEMPERATURE)

25°C

TEMPERATURE

COMPUTER AIDS FOR THERMISTOR SELECTION

A spreadsheet is available for the Vishay Thermistor Materials that calculates Beta, Steinhart-Hart Equation Constants A, B,

and C, the resistance at any temperature based upon the Steinhart constants or Beta, the temperature equivalent of the

resistance reading, and resistance temperature coefficients.

This spread sheet will also calculate the total resistance tolerance of any point matched thermistor for temperatures in 10ºC

increments, and the resistance tolerance at any temperature within the calibrated range of curve tracking thermistors. Please

contact factory if interested in this Excel™ spreadsheet.

Document Number: 33003

Revision 11-Feb-02

www.vishay.com

For technical questions, contact thermistor1@vishay.com

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