Series 1 BetaCurve Bare leaded Thermistors
Introduction
The BetaCURVE Thermistor Series I are small epoxy coated devices with solid tin plated lead
wires. The series offers a choice of precision temperature tolerance classifications for a wide
variety of customer applications, such as temperature measurements, temperature indication,
temperature control, and thermal compensation.
The BetaCURVE Series history of "long term" stability and reliability performance have been
demonstrated in critical medical, scientific instrumentation, military/aerospace and industrial
applications.
Thermistor interchangeability has become an important factor for cost efficiency in advanced
thermal performance applications. The need for expensive individual thermistor calibration is not
necessary. The BetaCURVE Series interchangeability means that each device will match the
published Resistance−Temperature Characteristics for a given thermistor and will be within the
specified deviation (tolerance, ie. ±0.1°C, ±0.2°C, ±0.5°C and ±1.0°C) limits over the
temperature range 0°C to 70°C.
Shape and Dimensions
Features
Fast time response (1 second typical in
liquids).
DC (Dissipation Constant) = 0.75 mW/o
C typical in still air at 25ºC.
Available in custom probe assemblies.
Tight tolerance available − +/− 0.1oC
from oC to 70oC.
Proven Stability and Reliability.
Min./Max Temperature Exposure =
−80ºC to +150ºC.
Alloy lead wires for reduced thermal
conductivity ("stem effect").
Applications
Temperature sensing, control and
compensation.
Medical equipment and patient
monitoring.
Aerospace instrumentation and crystal
oscillator compensation.
Liquid or gas temperature control and
monitoring.
Assembly into probes for a wide variety
of applications.
Part Numbering System
Electrical Specifications
Part
Number
Color Code Resistance @
25°C (Ohms)
Resistance
Tol. @ 25°C
Temperature Tolerance and Range Alpha
@ 25°C
0/50 °C
Beta Value
Curve #
Number 25°C (Ohms) Tol. @ 25°C @ 25°C Beta Value
2.2K3A1A Brown 2252 ± 0.25% ± 0.1 °C (0 to 70 °C) −4.39 %/°C 3892 3
2.2K3A1B Brown 2252 ± 0.50% ± 0.2 °C (0 to 70 °C) −4.39 %/°C 3892 3
2.2K3A1C Brown 2252 ± 1.00% ± 0.5 °C (0 to 70 °C) −4.39 %/°C 3892 3
2.2K3A1D Brown 2252 ± 2.00% ± 1.0 °C (0 to 70 °C) −4.39 %/°C 3892 3
3K3A1A Red 3000 ± 0.25% ± 0.1 °C (0 to 70 °C) −4.39 %/°C 3892 3
3K3A1B Red 3000 ± 0.50% ± 0.2 °C (0 to 70 °C) −4.39 %/°C 3892 3
3K3A1C Red 3000 ± 1.00% ± 0.5 °C (0 to 70 °C) −4.39 %/°C 3892 3
3K3A1D Red 3000 ± 2.00% ± 1.0 °C (0 to 70 °C) −4.39 %/°C 3892 3
5K3A1A Orange 5000 ± 0.25% ± 0.1 °C (0 to 70 °C) −4.39 %/°C 3892 3
5K3A1B Orange 5000 ± 0.50% ± 0.2 °C (0 to 70 °C) −4.39 %/°C 3892 3
5K3A1C Orange 5000 ± 1.00% ± 0.5 °C (0 to 70 °C) −4.39 %/°C 3892 3
5K3A1D Orange 5000 ± 2.00% ± 1.0 °C (0 to 70 °C) −4.39 %/°C 3892 3
10K3A1A Yellow 10000 ± 0.25% ± 0.1 °C (0 to 70 °C) −4.39 %/°C 3892 3
10K3A1B Yellow 10000 ± 0.50% ± 0.2 °C (0 to 70 °C) −4.39 %/°C 3892 3
10K3A1C Yellow 10000 ± 1.00% ± 0.5 °C (0 to 70 °C) −4.39 %/°C 3892 3
10K3A1D Yellow 10000 ± 2.00% ± 1.0 °C (0 to 70 °C) −4.39 %/°C 3892 3
10K4A1A Black 10000 ± 0.25% ± 0.1 °C (0 to 70 °C) −4.04 %/°C 3575 4
10K4A1B Black 10000 ± 0.50% ± 0.2 °C (0 to 70 °C) −4.04 %/°C 3575 4
10K4A1C Black 10000 ± 1.00% ± 0.5 °C (0 to 70 °C) −4.04 %/°C 3575 4
10K4A1D Black 10000 ± 2.00% ± 1.0 °C (0 to 70 °C) −4.04 %/°C 3575 4
30K5A1A White 30000 ± 0.25% ± 0.1 °C (0 to 70 °C) −4.30 %/°C 3811 5
30K5A1B White 30000 ± 0.50% ± 0.2 °C (0 to 70 °C) −4.30 %/°C 3811 5
30K5A1C White 30000 ± 1.00% ± 0.5 °C (0 to 70 °C) −4.30 %/°C 3811 5
30K5A1D White 30000 ± 2.00% ± 1.0 °C (0 to 70 °C) −4.30 %/°C 3811 5
30K6A1A Green 30000 ± 0.25% ± 0.1 °C (0 to 70 °C) −4.68 %/°C 4143 6
30K6A1B Green 30000 ± 0.50% ± 0.2 °C (0 to 70 °C) −4.68 %/°C 4143 6
30K6A1C Green 30000 ± 1.00% ± 0.5 °C (0 to 70 °C) −4.68 %/°C 4143 6
30K6A1D Green 30000 ± 2.00% ± 1.0 °C (0 to 70 °C) −4.68 %/°C 4143 6
50K6A1A Blue 50000 ± 0.25% ± 0.1 °C (0 to 70 °C) −4.68 %/°C 4143 6
50K6A1B Blue 50000 ± 0.50% ± 0.2 °C (0 to 70 °C) −4.68 %/°C 4143 6
50K6A1C Blue 50000 ± 1.00% ± 0.5 °C (0 to 70 °C) −4.68 %/°C 4143 6
50K6A1D Blue 50000 ± 2.00% ± 1.0 °C (0 to 70 °C) −4.68 %/°C 4143 6
100K6A1A Violet 100000 ± 0.25% ± 0.1 °C (0 to 70 °C) −4.68 %/°C 4143 6
100K6A1B Violet 100000 ± 0.50% ± 0.2 °C (0 to 70 °C) −4.68 %/°C 4143 6
100K6A1C Violet 100000 ± 1.00% ± 0.5 °C (0 to 70 °C) −4.68 %/°C 4143 6
100K6A1D Violet 100000 ± 2.00% ± 1.0 °C (0 to 70 °C) −4.68 %/°C 4143 6
For details on the minimum order quantity (MOQ) of this product, please contact BetaTHERM or your local BetaTHERM representative.
Sales:
sales@betatherm.com
Tel: +353 91 753238/753612
Fax: +353 91 770789/753615
Sales:
sales@betatherm−usa.com
Tel: 508 842 0516
Fax: 508 842 0748
