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NTC Thermistors

NTC & PTC Thermistors

High Precision NTC Thermistors for Extremely Accurate Temperature Measurement The MF51E NTC Thermistors were specially designed for use in electronic thermometers which require better than average accuracy. The extremely small size allows the thermistor to respond very quickly to tiny changes in temperature. The MF51E can be supplied un-calibrated with standard tolerances or calibrated and grouped according to R at 37°C±0.01% for extreme interchangeability so as to eliminate the need for other calibrations.

MF51E

Applications

• Electronic Thermometers
• Medical Equipment and Patient Monitoring

Characteristics

• Small Size and fast response and light weight
• Available tolerances: ±0.5%, ±1%, ±2%, ±3% and ±5%
• B Value tolerances: ±0.5%, ±1.0% and ±2.0%
• Resistance calibration available at 37°C ±0.01% (see table for details of grouping)
• Long-term Stability and Reliability
• Excellent Tolerance and Interchangeability
• Available in all popular resistance values
• Dissipation Constant ≥0.7mW/°C
• Time Constant of ≤3.2 seconds
• Rated Power: 3.5mW
• Operating Temperature Range -40°C to 100°C

Dimensions

Dimension D max L 1 max L 1
+/- 3
L 2
+/- 1
d
+/- 0.05
Normal size 1.6 4.0 100 3 0.2
1.6
Special size Customer Specified Customer Specified Customer Specified Customer Specified Customer Specified

Main Techno Parameter

Part No. Nominal resistance
R 25ƒC
B Value
(R25/50ƒC)
Rated power
(mw)
Dissipation
(mW/ƒC)
Thermal time constant
(S)
Operating
temp.
(ƒC)
Range
(KΩ)
Tolerance
(%)
Nominal value
(K)
Tolerance
(%)
MF51E3270
MF51E3380
MF51E3470
MF51E3600
MF51E3950
MF51E4000
MF51E4050
MF51E4150
MF51E4300
MF51E4500
0.2-20
0.5-50
0.5-50
1-100
5-100
5-100
5-200
10-250
20-1000
20-1000
E+/-0.5

F+/-1

G+/-2

H+/-3

J+/-5

3270
3380
3470
3600
3950
4000
4050
4150
4300
4500
E+/-0.5

F+/-1

G+/-2

3.5 ≥ 0.7 ≤ 3.2 -40ƒ – +100

Specification

Resistance Calibration at 37†C +/- 0.01†C of MF51E503F3950

Group Resistance Group Resistance Group Resistance
min mid max min mid max min mid max
1 29.085 29.111 29.137 12 29.668 29.695 29.721 23 30.264 30.291 30.318
2 29.138 29.164 29.189 13 29.722 29.749 29.775 24 30.319 30.346 30.373
3 29.190 29.216 29.242 14 29.776 29.802 29.828 25 30.374 30.401 30.428
4 29.243 29.269 29.294 15 29.829 29.856 29.883 26 30.429 30.456 30.483
5 29.295 29.322 29.348 16 29.884 29.910 29.936 27 30.484 30.511 30.538
6 29.349 29.375 29.400 17 29.937 29.964 29.991 28 30.539 30.566 30.593
7 29.401 29.428 29.454 18 29.992 30.019 30.045 29 30.594 30.622 30.649
8 29.455 29.481 29.507 19 30.046 30.073 30.100 30 30.650 30.677 30.703
9 29.508 29.535 29.561 20 30.101 30.128 30.154 31 30.704 30.731 30.758
10 29.562 29.588 29.614 21 30.155 30.182 30.209 32 30.759 30.785 30.811
11 29.615 29.641 29.667 22 30.210 30.237 30.263