These PC-Mount Economy Audio Transformers are competitively priced when compared with other offshore products and carry Prem's 100% tested and inspected quality assurance. Although not manufactured by Prem, these units still undergo our stringent testing procedure where each part is individually tested to our specifications. Prem also carries stock on these units, so you won't have the wait often associated with offshore sources. All units have a dielectric strength (HIPOT) rating of 1,000 Vac which makes them usable in a number of applications. When combined with their other basic electrical characteristics (impedance tolerances of ±10% at 1KHz and DCR tolerances of ±20%) these units are an exceptional value. Available in four metric sizes for power requirements of 75mW, 100mW, 200mW, and 460mW, these units have tinned copper wire (TCW) leads and a printed circuit mount channel frame to secure the part to the pc-board.

	Size	Description	Impedance (Ohms)		DC Resistance (Ohms)
			PRI	SEC	PRI	SEC
SPT-201	1	Output	500 C.T.	8 C.T.	35	0.8
SPT-130		Coupling	600 C.T.	600 C.T.	45	40
SPT-202		Output	1K C.T.	8 C.T.	60	0.8
SPT-203		Coupling	10K C.T.	600 C.T.	450	100
SPT-204		Driver	10K C.T.	2K C.T.	500	200
SPT-301	2	Output	500 C.T.	8 C.T.	22	0.8
SPT-302		Interstage	500 C.T.	500 C.T.	30	28
SPT-303		Output	1.2K C.T.	8 C.T.	80	0.8
SPT-304		Output	48 C.T.	8 C.T.	2.5	0.5
SPT-305		Output	200 C.T.	8 C.T.	12	0.8
SPT-400	3	Output	200 C.T.	8 C.T.	12	0.8
SPT-401		Output	500 C.T.	8 C.T.	26	0.8
SPT-129		Coupling	600 C.T.	600 C.T.	65	55
SPT-402		Output	800 C.T.	8 C.T.	40	0.8
SPT-403		Output	1.2K C.T.	8 C.T.	80	0.8
SPT-404		Interstage	1.5K C.T.	500 C.T.	120	50
SPT-405		Coupling	10K C.T.	600 C.T.	600	100
SPT-406		Driver	10K C.T.	2K C.T.	600	155
SPT-500	4	Output	48 C.T.	8 C.T.	2.5	0.5
SPT-501		Output	120 C.T.	8 C.T.	7	0.7
SPT-502		Output	200 C.T.	8 C.T.	12	0.5
SPT-503		Output	500 C.T.	8 C.T.	18	0.7
SPT-504		Interstage	500 C.T.	500 C.T.	35	28
SPT-505		Driver	10K C.T.	2K C.T.	600	155
SPT-506		Output	1.2K C.T.	8 C.T.	75	0.8
SPT-507		Coupling	600 C.T.	600 C.T.	65	55

Dimensional Drawing

			"P" designates primary side. Dielectric strength 1000 Vac (PRI-SEC-CORE) Resistances ±20% Impedances ±10% (at 1KHz) All dimensions nominal
			Schematic Note: Pin numbers are for reference only
Dim.	Size 1	Size 2	Size 3	Size 4
	EI-14	EI-16	EI-19	EI-24
L (Overall)	15.2mm (.599")	17.7mm (.697")	20.3mm (.800")	25.3mm (1.00")
H	11.0mm (.433")	14.0mm (.551")	16.2mm (.640")	19.0mm (.750")
W (Between rows)	12.0mm (.473")	16.0mm (.630")	14.5mm (.571")	16.9mm (.666")
TW	2.0mm (.079")	2.2mm (.086")	2.2mm (.086")	2.6mm (.102")
TL	3.8mm (.150")	4.0mm (.157")	4.2mm (.165")	4.8mm (.189")
BT	2.5mm (.098")	2.8mm (.110")	3.0mm (.118")	4.5mm (.177")
Watts (max)	.075	.100	.200	.460
Leads	.40mm (#26AWG)	.43mm (#25AWG)	.43mm (#25AWG)	.48mm (#24AWG)