L2-47N Datasheet, PDF (6/9 Pages) Superworld Electronics – FERRITE CHIP INDUCTORS

FERRITE CHIP INDUCTORS
L2 SERIES
9. SOLDERIND AND MOUNTING :
9-1. Recommended PC Board Pattern
2.60
0.60
PC board should be designed so that products are not sufficient
under mechanical stress as warping the board.
Products shall be positioned in the sideway direction against
the mechanical stress to prevent failure.
9-2. Soldering
Mildly activated rosin fluxes are preferred. The minimum amount of solder can lead to damage from the stresses caused
by the difference in coefficients of expansion between solder, chip and substrate. The terminations are suitable for all
wave and re-flow soldering systems. If hand soldering cannot be avoided, the preferred technique is the utilization of hot
air soldering tools.
9-2.1 Lead Free Solder Re-flow :
Recommended temperature profiles for re-flow soldering in Figure 1.
9-2.2 Solder Wave :
Wave soldering is perhaps the most rigorous of surface mount soldering processes due to the steep rise in temperature
seen by the circuit when immersed in the molten solder wave, typical at 230°C. Due to the risk of thermal damage to
products, wave soldering of large size products is discouraged. Recommended temperature profile for wave soldering
is shown in Fig. 2
9-2.3 Soldering Iron (Figure 3) :
Products attachment with soldering iron is discouraged due to the inherent process control limitations. In the event that
a soldering iron must be employed the following precautions are recommended.
Note :
a) Preheat circuit and products to 150°C.
d) 1.0mm tip diameter (max)
b) 350°C tip temperature (max)
e) Use a 20 watt soldering iron with tip diameter of 1.0mm
c) Never contact the ceramic with the iron tip
f) Limit soldering time to 3 secs.
Preheating
250 ~ 260
230
180
150
Soldering
10s max.
Natural
cooling
60~120s
30~60s
Preheating
260
245
150
Soldering Natural
cooling
Time(sec.)
Figure 1. Re-flow Soldering
Preheating
350
330
150
Soldering
3s
(max.)
10s
(max.)
Natural
cooling
Over 2min.
Gradual
Cooling
Within 3s
Figure 2. Wave Soldering
Over 1min.
Gradual
Cooling
Figure 3. Hand Soldering
NOTE : Specifications subject to change without notice. Please check our website for latest information.
01.04.2008
SUPERWORLD ELECTRONICS (S) PTE LTD
PG. 6