12
Quality Thermistor’s QT0805 Surface Mount
Thermistors are the ideal solution for tempera-
ture sensing functions found
in temperature compensation networks.
QT0805 Series
The patented design features Leach Guard™terminations
which are able to withstand many of today’s modern
automated assembly and soldering processes. Standard
EIA sizing allows for tape and reel packaging designed for
automated placement equipment. Contact Technical Support
for information regarding our SMD engineering kit.
Engineering Information
Thermal Time Constant:* 8 seconds (max.) - Still Air
Dissipation Constant:* 2 mW/°C (min.) - Still Air
Temperature Range: –65°C – 150°C
Power Rating: 1/8 w (max.)
NTC Surface Mount Thermistors
Dimensions QT0805 Style
L = .078" +/– .008"
W = .049" +/– .008"
T = .055" Max
BW = .016" +/– .010"
PATENT #5,257,003
Other sizes and values available. Contact factory for details.
-Optional Termination Finishes*:
T = Pure Tin
G = Gold
-Standard Termination Finishes: Solder Tin/Lead (not RoHS compliant)
PART NUMBER RESISTANCE @ 25°C (OHMS) R-T CURVE BETA (ß) 75/25
QT0805K-500 50 K 2282
QT0805K-101 100 K 2282
QT0805X-102 1,000 X 3000
QT0805T-202 2,000 T 3181
QT0805Y-502 5,000 Y 3513
QT0805Y-103 10,000 Y 3513
QT0805Y-203 20,000 Y 3513
QT0805Z-503 50,000 Z 3966
QT0805Z-104 100,000 Z 3966
QT0805P-685 6.8 Meg P 4829
QT0805P-106 10 Meg P 4829
Ordering Information
QT0805Z-104K-?
Typical installation in TCXO
(temperature compensated
crystal oscillator) application
Surface Mount
NTC THERMISTORS
* Depends on mounting
Optional Termination Finish
Tolerance Code
Number of Zeros
1st and 2nd Resistance Digits
R/T Curve
Tolerance Options:
M+/- 20%
K +/- 10%
J +/- 5%
*Optional Termination Finishes
are RoHS compliant
