The Sun 270-6920-03 501-6920-03 Power Distribution Board, 270-6920-03 Rev 01 is in in stock at Calhoun Technologies. For over 10 years Calhoun Technologies has been saving companies likes your up to 80% off list price on hard to find computer hardware. Manufacturer: Sun Part Number: 270-6920-03 Details: Sun 270-6920-03 501-6920-03 Power Distribution Board, 270-6920-03 Rev 01