BetaTHERM Sensors NTC Disc Thermistor
Ireland 353-91-753238 BetaTHERM Web: http://www.betatherm.com
U.S.A. 508-842-0516 75
Photo
K2M and K3M Configuration
K5M Configuration
Sample Part Number:
NTC Disc Thermistors:
Applications
¥ Temperature Compensation for transistor and
various electronic circuits.
¥ Detection and control of temperatures for air
conditioning equipment.
¥ Delay circuit such as relay.
¥ Automotive Electronics.
Features
¥ Economically priced
¥ Available in tape and reel format.
¥ Max temperature exposure = +130oC.
¥ High D.C. (Dissipation Constant) from 2.0mW/oC to
7.5mW/oC.
¥ Available in tolerances of +/-3%, +/-5% and +/-10%.
¥ Custom resistance values and tolerances available
upon request.
NTC Disc Part Numbers and Specifications:
Part Resistance @ 25/85oC Resistance
Number 25oC Ohms Beta Value K
Tolerance @ 25oC
K2M1KA2 1000 3520 +/-10%
K2M3KA2 3000 3810 +/-10%
K2M5KA2 5000 3910 +/-10%
K2M10KA2 10000 4050 +/-10%
K2M30KA2 30000 4270 +/-10%
K2M50KA2 50000 4330 +/-10%
K3M.5KA2 500 3430 +/-10%
K3M1KA2 1000 3620 +/-10%
K3M3KA2 3000 3880 +/-10%
K3M5KA2 5000 3950 +/-10%
K3M10KA2 10000 4130 +/-10%
K3M30KA2 30000 4240 +/-10%
K5M.05KA2 50 3200 +/-10%
K5M.1KA2 100 3350 +/-10%
K5M.2KA2 200 3500 +/-10%
K5M.3KA2 300 3550 +/-10%
K5M.5KA2 500 3650 +/-10%
K5M1KA2 1000 3800 +/-10%
K5M2KA2 2000 3900 +/-10%
K5M5KA2 5000 4150 +/-10%
K5M10KA2 10000 4200 +/-10%
K5M20KA2 20000 4300 +/-10%
K5M50KA2 50000 4650 +/-10%
K5M150KA2 150000 4900 +/-10%
25/85 Beta tolerance = +/-5%
Type Rated Power Dissipation Time Max Operating
@ 25 oC Constant Constant Temperature oC
K2M 100mW 2.0mw/ oC 10 seconds 130 oC
K3M 250mW 3.0mw/ oC 15 seconds 130 oC
K5M 500mW 7.5mw/ oC 20 seconds 130 oC
Type K2M K3M
D
L
d (0)
3.0mm
25mm
0.3mm
4.5mm
25mm
0.5mm
Dimensions in mm
d (0)
L
Resin Coating
D
K
Tolerance Code
Epoxy Resin Coated
Nominal Resistance Value @ 25oC
Element Dimensions (see chart)
Disc Thermistor
2M A1K 2
Type DTLds
6.5 5.0 28 0.5 3.0
+/-1.0
K5M
Dimensions in mm
Resin
Coating
T
L
Soldered
CP Wire
s
d
D
BetaTHERM Sensors Inrush Current Limit Thermistor
Ireland 353-91-753238 BetaTHERM Web: http://www.betatherm.com
U.S.A. 508-842-0516 76
Photo
Application Circuits:
Part Number Code:
Inrush Current Limiter:
Applications:
¥ Suppressing capacitor induced inrush current.
¥ Surge current to filament bulbs.
¥ Switching mode power supplies.
¥ Inverter for fluorescent lamp.
¥ Heater and control fan motor speed of cooler for
electric circuits.
Features:
¥ Economically priced.
¥ Available in tape and reel format
¥ High quality and high reliability due to superior
manufacturing technology.
¥ Operating temperature range: -40oC to 180oC.
¥ Resistance tolerance at 25oC: +/-20%
¥ 25/85 Beta Value range: 2900 to 3800 (+/-10%).
These NTC Thermistor devices are designed for
suppressing inrush current to electronic circuits.Circuits
that contain components with PTC characteristics (such
as incandescent bulbs or coils) can experience inrush
current more than 100 times the normal current on
"power-up" when the circuit components are cold . The
Power thermistor prevents electronic equipment from
being damaged by limiting the inrush current to the
circuit.
Resistance selection formula (25oC).
Rt : Resistance at 25oC.
E : Line voltage.
Is : Inrush current.
Rt >2E
Is
Resistance in Ohms @ 25oC
Epoxy Coating (A), ÒSÓ for Silicone Coating
Disc Diameter: mmÕs 7
Current Limiter (Disc)
CLK 7M 8 A
NTC
220V
110V
NTC
NTC
BetaTHERM Sensors Inrush Current Limit Thermistor
Ireland 353-91-753238 BetaTHERM Web: http://www.betatherm.com
U.S.A. 508-842-0516 77
I.C.L. Configuration Inrush Current Limiter (I.C.L.) Dimensions:
Disc Disc Element D T L P F d (dia)
Code Diameter (mm) (mm) (mm) (mm)
CLK7M 7mm 9.5 max 5 max 25 min 5 +/-1mm 6 max 0.6mm
CLK9M 9mm 10.5 max 5 max 25 min 5 +/-1mm 6 max 0.6mm
CLK11M 11mm 12.5 max 5 max 25 min 7.5 +/-1mm 6 max 0.8mm
CLK13M 13mm 14.5 max 5 max 25 min 7.5 +/-1mm 6 max 0.8mm
CLK15M 15mm 16.5 max 6 max 25 min 10 +/-1mm 6 max 1.0mm
CLK22M 22mm 24.0 max 7 max 25 min 10 +/-1mm 6 max 1.0mm
Inrush Current Limiter Part Numbers and Specifications:
Part Number Resistance Max Steady Dissipation Time 25/85 Beta Part Number Resistance Max Steady Dissipation Time 25/85 Beta
at 25 oC Current Constant Constant Value K at 25 oC Current Constant Constant Value K
(ohms) (amps) (mW/ oC) (Sec.) (ohms) (amps) (mW/ oC) (Sec.)
CLK7M5A 5 +/-20% 3.0 9 35 3000 CLK13M3A 3 +/-20% 5.0 14 45 3000
CLK7M8A 8 +/-20% 3.0 9 35 2950 CLK13M5A 5 +/-20% 5.0 15 70 3000
CLK7M10A 10 +/-20% 2.3 9 30 3000 CLK13M8A 8 +/-20% 4.0 16 65 3050
CLK7M15A 15 +/-20% 2.0 12 30 3050 CLK13M10A 10 +/-20% 4.0 17 60 2950
CLK7M16A 16 +/-20% 2.0 12 30 3050 CLK13M16A 16 +/-20% 3.0 19 55 3200
CLK7M22A 22 +/-20% 1.5 10 32 3000 CLK13M50A 50 +/-20% 2.0 15 75 3400
CLK7M50A 50 +/-20% 1.5 8 28 3100
CLK9M3A 3 +/-20% 4.0 11 42 2950 CLK15M2.5A 2.5 +/-20% 6.5 20 65 2900
CLK9M5A 5 +/-20% 3.8 11 42 2900 CLK15M3A 3 +/-20% 6.5 20 70 2900
CLK9M8A 8 +/-20% 3.5 12 43 3000 CLK15M5A 5 +/-20% 6.0 20 75 2900
CLK9M10A 10 +/-20% 3.0 12 50 2950 CLK15M8A 8 +/-20% 5.0 20 75 3000
CLK9M12A 12 +/-20% 3.0 12 40 3000 CLK15M10A 10 +/-20% 4.8 19 80 3100
CLK9M16A 16 +/-20% 2.5 11 44 3150 CLK15M16A 16 +/-20% 4.0 17 85 3200
CLK9M18A 18 +/-20% 2.0 10 46 3150 CLK15M20A 20 +/-20% 3.0 15 90 3250
CLK9M22A 22 +/-20% 2.0 10 46 3200 CLK15M25A 25 +/-20% 2.8 15 90 3250
CLK9M50A 50 +/-20% 1.5 10 47 3200 CLK15M30A 30 +/-20% 2.5 16 95 3300
CLK9M400A 400 +/-20% 1.5 9 25 3800
CLK11M3A 3 +/-20% 5.0 12 45 2900 CLK22M2.5A 2.5 +/-20% 7.0 24 100 3000
CLK11M5A 5 +/-20% 4.0 13 45 2950 CLK22M3A 3 +/-20% 7.0 24 100 3100
CLK11M8A 8 +/-20% 3.5 14 45 3000 CLK22M5A 5 +/-20% 6.6 25 85 3150
CLK11M10A 10 +/-20% 3.0 14 45 3000
CLK11M12A 12 +/-20% 3.0 14 48 3100
CLK11M16A 16 +/-20% 2.8 14 50 3150
CLK11M25A 25 +/-20% 2.5 13 53 3200
DDT
L
F
P
d
Soldered
CP Wire
