CAT# DC-4833
$3.50 each
Densei-Lambda PSS6-48-3R3. Input: 48V. Output: 3.3V, 1.5A. 1.12" x 0.8" x 0.31". RoHS, UL.
Spec sheet available in PDF format.
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A customer from GREENWOOD, IN USA
Good Price and seems to work well.
Using this for poor man's version of PoE, but with 48V on additional wires for a RS485 network running small ATMega Microcontrollers and sensors.

From datasheet:
Vin is 36-72V, connect a 10uF cap across input.
Output is 3.3V, connect a 1uF cap across output.

To enable, connect CNT to Vin-.

Switching is around 8 MHz and output noise is reasonable. Reduced if you include the recommended 1uF cap.