LEAG3W Datasheet, PDF (5/19 Pages) OSRAM GmbH – Lead (Pb) Free Product - RoHS Compliant

LE A G3W, LE T G3W, LE B G3W
SMD NTC Thermistors
SMD NTC Thermistors
R₂₅
No. of R/T
B_25/50
B_25/85
Resistance
characteristic
Tolerance
[Ω]
s*
[K]
[K]
Δ R_N/R_N
10k
EPCOS 8502 3940
3980
± 5%
* for further information please visit www.epcos.com
B value
Tolerance
Δ B/B
± 3%
P_NTC,max,25
[mW]
180
R_T
=
R_N
⋅
B
e
⋅
⎛
⎝
-¹--
T
–
-_T-¹--_N--_⎠⎞
R_T = NTC resistance in Ω at temperature T in K
R_N = NTC resistance in Ω at rated temperature T_N
in K (T_N = 298 K for test condition)
T, T_N = temperature in K
e = base of the natural logarithm (e = 2.71828)
B = B value, material specific constant of the NTC
thermistor
B
=
B_{N ⁄ T}
=
-^T-----^â‹---^T----^N--- ⋅ ln -^R----^N-
T – T_N R_T
Typische Thermistor Kennlinie^{2) 5) Seite 19}
Typical Thermistor Graph^{2) 5) page 19}
I_F = f (V_F); T_board = 25 °C
10000
OHL02609
Ω
R
7000
6000
5000
4000
3000
2000
1000
0
0 10 20 30 40 50 60 70 ˚C 90
T_NTC
2010-03-03
5