Hammond 229A120 6VA 120V C.T./60V Low Profile PCB Transformer

The 229A120 is a compact 6 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 120V center-tapped at 50 mA when the windings are connected in series, or 60V at 100 mA when connected in parallel, giving one of the highest secondary voltages in the 229 Series, which spans 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 6 VA frame measures A 1.56” (40 mm), B 1.88” (48 mm) and C 0.85” (22 mm), with D 0.38” (10 mm), D1 0.38” (10 mm) and E 1.60” (41 mm). PC board (card) spacing is 1.00” (25 mm), pins are 0.02” x 0.04” (1 mm x 1 mm), and regulation is 30%. Shipping weight is 0.6 lbs (0.27 kg).

The 229A120 drawing adds toleranced dimensions and factory test limits: excitation current (Iex) of 39.72mA Max., secondary no-load voltage of 81.38V ±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 60V 50mA 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 229A120 when your design calls for 6 VA with a 120V C.T. / 60V secondary on a low profile board-mount footprint.