sendust cores have significantly lower losess than iron powder cores, but have higher core losses than MPP cores. Compared to iron powder, sendust core losss could be as low as 40% to 50% of iron powder core loss . sendust cores also exhibits very low magnetostriction coefficient , and it is therefore suitable for applications requiring low and audible noise. Sendust cores has a saturation flux density of 10,000 gauss which is lower than iron powder. However , sendust offers high energy storage than MPP or gapped ferrites.

 Sendust cores are available in initial permeabilities(ui) of 60 and 125. Sendust core offer minimal change in permeability or inductance(under 3% for ui=125) under AC excitation. Temperature stability is very good at the high end. Inductance change is less than 3% from ambient to 125 deg C. However, as the temperature decreases to 65 deg C, its inductance decreases by about 15% for UI=125. Also note that as temperature increases, sendust exhibits decrease in inductance versus an increase in inductance for all the other powder materials. This could be a good choice for temperature compensation, when used with other materials in a composite core structure.

 Sendust cores cost less than MPP or high fluxes, but slightly more expensive than iron powder cores. For application involving DC bias conditions, use the following guidelines. To get under 20% decrease in initial permeability under DC bias condition.:

For ui=60 cores, max. DC bias<40 oersted ; ui=125, max. DC bias < 15 oersted.

Unique features:

1. lower core loss than iron powder(400Mw/CM @50KHz/1000gauss)
2. Low magnetostriction coefficient, low audible noise.
3. Good temperature stability. Under 4% from -15 degree C to 125 degree C.
4. Maximum flux density: 10,000 gauss(1.0 tesla)
5. Excellent DC bias characteristic.

Applications:

1. Switching regulars or power inductors in SMPS.
2. Switch mode power supply
3. Power factor correction(PFC) chokes for general applications.
4. Fly-back and Pulse transformers(inductors)
5. In line noise filters
6. Swing chokes.
7. Phase control circuits(low audible noise) light dimmers, motor speed control devices.