THERMAL SENSORS / CIRCUIT PROTECTORS
TECHNOLOGY OF TOMORROW
THERMAL SENSORS
NTC THERMISTOR
THICK FILM
STRUCTURE
1 Ceramic substrate
2 Top termination (Ag Pd)
3 Bottom termination (Ag)
4 Resistor element
5 Glass layer
NT73
6 Protective layer
7 End termination (Ni Cr)
8 Diffusion barrier (Ni)
9 Solder plating
IDENTIFICATION
PRODUCT CODE
COATING COLOR
MARKING
Products with Pb-free terminations
meet RoHS requirements
NT73
Pink
Black, 3 digits (1J has no marking)
TYPE DESIGNATION (HOW TO ORDER)
Old Part No.
NT73
NT73
2A
2A
K
TD
TD
33K
333
New Part No.
(Pb-free)
K
3800
J
T
TAPING*
RESISTANCE
NOMINAL
B CONSTANT
PRODUCT CODE
STYLE
TERMINATION
RESISTANCE
NOM. RESISTANCE
TD, BK
3 digits
TOLERANCE B CONSTANT TOLERANCE
SURFACE MATERIAL TOLERANCE
H( 3ꢀ)
J( 5ꢀ)
K( 10ꢀ)
*Please see “PACKAGING”
L( 15ꢀ), K( 10ꢀ)
J( 5ꢀ)
T: Sn
L: Sn/Pb
FEATURES
DIMENSIONS (mm)
■
■
■
■
■
SMD style thick film NTC thermistor
■
■
Operating temperature range:
- 55° C ... + 125° C
TYPE
L
W
H
c
d
Anti leaching nickel barrier terminations
Thermal time constant ~ 2 sec.
Power rating: 5 mW
Suitable for reflow and wave soldering
NT73 1J
NT73 2A
NT73 2B
1.6 0.2 0.80 0.1 0.5 0.1 0.3 0.1 0.3 0.1
2.0 0.2 1.25 0.1 0.5 0.1 0.4 0.2 0.3 0.2
3.2 0.2 1.60 0.2 0.6 0.1 0.5 0.3 0.4 0.1
+0.2
–0.1
+0.2
–0.1
+0.2
Meets or exceeds IEC 60115-1, JIS C 5201-8, JIS C 2570
–0.1
RATING
THERMAL**
POWER
RATING
NOM. RESISTANCE
AT 25°C*
RESISTANCE
B CONSTANT
AT 25° C / 75° C
3500K
B CONSTANT
TOLERANCE
SIZE
TYPE
DISSIPATION CONSTANT
TOLERANCE
6.8 kΩ
10 kΩ
10 kΩ
15 kΩ
20 kΩ
22 kΩ
30 kΩ
33 kΩ
47 kΩ
47 kΩ
68 kΩ
100 kΩ
1 kΩ
K ( 10ꢀ)
J( 5ꢀ)
H( 3ꢀ)
3700K
J( 5ꢀ)
K( 10ꢀ)
J( 5ꢀ)
0603
NT73 1J
2 mW/K
(ref.)
5 mW
3800K
4100K
H( 3ꢀ)
J( 5ꢀ)
3800K
3200K
2 kΩ
K( 10ꢀ)
L( 15ꢀ)
K( 10
ꢀ)
2.2 kΩ
2.4 kΩ
3.3 kΩ
4.7 kΩ
5 kΩ
3500K
J( 5ꢀ)
J( 5ꢀ), K( 10ꢀ), L( 15ꢀ)
K( 10ꢀ), L( 15ꢀ)
6.8 kΩ
10 kΩ
10 kΩ
10 kΩ
15 kΩ
15 kΩ
20 kΩ
20 kΩ
22 kΩ
22 kΩ
30 kΩ
30 kΩ
33 kΩ
33 kΩ
47 kΩ
47 kΩ
50 kΩ
68 kΩ
68 kΩ
100 kΩ
100 kΩ
150 kΩ
150 kΩ
1k Ω
3800K
3500K
3800K
4100K
3800K
4100K
3800K
4100K
3800K
4100K
3800K
4100K
3800K
4100K
3800K
4100K
3950K
3800K
4100K
3800K
4100K
3800K
4100K
3200K
K( 10ꢀ)
J( 5ꢀ)
H( 3ꢀ)
J( 5ꢀ)
H( 3ꢀ)
J( 5ꢀ)
H( 3ꢀ)
J( 5ꢀ)
H( 3ꢀ)
J( 5ꢀ)
H( 3ꢀ)
J( 5ꢀ)
H( 3ꢀ)
J( 5ꢀ)
H( 3ꢀ)
H( 3ꢀ)
J( 5ꢀ)
H( 3ꢀ)
J( 5ꢀ)
H( 3ꢀ)
J( 5ꢀ)
H( 3ꢀ)
0805
NT73 2A
2.8 mW/K
(ref.)
5 mW
J( 5ꢀ)
K( 10ꢀ)
L( 15ꢀ)
2.2 kΩ
3.3 kΩ
4.7 kΩ
6.8 kΩ
10 kΩ
22 kΩ
33 kΩ
47 kΩ
68 kΩ
100 kΩ
K( 10ꢀ)
L( 15ꢀ)
K( 10ꢀ)
3500K
1206
NT73 2B
3.0 mW/K
(ref.)
5 mW
J( 5ꢀ)
K( 10ꢀ)
L( 15ꢀ)
3800K
J( 5ꢀ)
*
Special ohmic values on request.
** Thermal Dissipation Constant – In the atmosphere – (Reference)
EUROPE GmbH • Kaddenbusch 6 • D-25578 Dägeling / ITZEHOE • PHONE: +49 (0) 48 21/89 89-0 • FAX: +49 (0) 48 21/89 89 89 • Internet: www.koaeurope.de
Revision: 26. Oct. 2005