Hi,
> 0603 is phenominally small for an rcd clamp network....specially thin film.
The capacitor in parallel to the resistor is a 0603 Kemet 1 kV
> are you sure thats not an active clamp flyback.?
I'm sure ;-)
TDK-LAMBDA for that series of AC/DC flyback converters use an external NEC MOSFET which allows 1.5 A
At a fixed power, high primary current means low primary inductance. P = (1/2 * L * i ^ 2) * f
Since the leakage inductance is low (low losses) they can use a 0603 resistor.
The diode, of the RCD network, has a cylindrical ferrite bead on the cathode lead.
The controller is a Fairchild SO8 very common.
Enrico Migliore