Gradual Cooling

Within 3secs.

Figure 2. Wave Soldering

SUPERWORLD ELECTRONICS (S) PTE LTD

Figure 1. Re-flow Soldering

Within 10secs.

Over

1min.

NOTE : Specifications subject to change without notice. Please check our website for latest information.

Over

1min.

Over 1min.

Within 3secs.

Figure 3. Hand Soldering

Gradual Cooling

Soldering

Preheating

230

150

280

Gradual Cooling

Natural

cooling

Over 2mins.

PG. 6

31.07.2008

wave and re-flow soldering systems. If hand soldering cannot be avoided, the preferred technique is the utilization of hot

by the difference in coefficients of expansion between solder, chip and substrate. Our terminations are suitable for all

Mildly activated rosin fluxes are preferred. The minimum amount of solder can lead to damage from the stresses caused

products, wave soldering of large size products is discouraged. Recommended temperature profile for wave soldering

seen by the circuit when immersed in the molten solder wave, typical at 240°C. Due to the risk of thermal damage to

Wave soldering is perhaps the most rigorous of surface mount soldering processes due to the steep rise in temperature

Products attachment with soldering iron is discouraged due to the inherent process control limitations. In the event that

is shown in Figure 2.

Soldering

a soldering iron must be employed the following precautions are recommended.

7-2.3 Soldering Iron (Figure 2) :

Note :

230

150

Preheating

c) Never contact the ceramic with the iron tip

e) Use a 20 watt soldering iron with tip diameter of 1.0mm

cooling

Natural

f) Limit soldering time to 3 secs.

d) 1.0mm tip diameter (max)

230

250

150

Preheating

Soldering

b) 280°C tip temperature (max)

a) Preheat circuit and products to 150°C.

7-2.2 Solder Wave :

Recommended temperature profiles for re-flow soldering in Figure 1.

7-2.1 Solder Re-flow :

air soldering tools.

7-2. Soldering

Natural

cooling

7-1. Recommended PC Board Pattern

7. SOLDERING AND MOUNTING :

WIREWOUND CHIP INDUCTORS

SDI322520 SERIES

1.50

1.50

1.00