Hammond 229C30 24VA 30V C.T./15V Low Profile PCB Transformer

The 229C30 is a 24 VA low profile power transformer from the 229 Series, built for direct mounting on a printed circuit board. Its universal dual primary accepts 115V or 230V at 50/60 Hz, and its secondary delivers 30V center-tapped at 800 mA when the windings are connected in series, or 15V at 1.6 A when connected in parallel, giving a higher secondary voltage within the 229 Series span of 10V to 230V center-tapped. It suits OEM engineers and electronics designers specifying on-board power for equipment sold into both 115V and 230V markets.

Construction uses a dual split bobbin with balanced windings and a semi-toroidal design. The result is low primary to secondary coupling and low EMF radiation, and no electrostatic shield is required. Insulation is Class B, rated 130 degrees C, and the unit is hipot rated at 1,750V RMS.

Per the specification data, the 24 VA frame measures A 2.25” (57 mm), B 2.87” (73 mm) and C 1.25” (32 mm), with D 0.60” (15 mm), D1 0.53” (13 mm) and E 1.90” (48 mm). PC board (card) spacing is 1.50” (38 mm), pins are 0.04” x 0.04” (1 mm x 1 mm), and regulation is 15%. Shipping weight is 1.02 lbs (0.46 kg).

The 229C30 drawing adds toleranced dimensions and factory test limits: excitation current (Iex) of 60mA Max., secondary no-load voltage of 18.24V ±2% per winding, and a primary to secondary hipot test at 1750V, 60Hz for 1 second. The windings are arranged as two 115V primary windings (pins 1-2 and 3-4); two 15V 800mA secondary windings (pins 5-6 and 7-8).

The transformer is C UL US recognized under UL file E207860 and is listed as RoHS and REACH compliant. Order 229C30 when your design calls for 24 VA with a 30V C.T. / 15V secondary on a low profile board-mount footprint.