Transistors

Germanium Transistor Selection Guide

The development of the germanium transistor in 1948 opened the door to countless applications of solid state electronics. From 1950 through the early 1970s, this area provided an increasing market for germanium, but then high-purity silicon began replacing germanium in transistors, diodes, and rectifiers.

(In Order of Case Style, * T_C = +63°C, ** T_C = +25°C)

NTE Type Number		Application	Maximum Breakdown Voltage (Volts)		Maximum Collector Current (Amps)	Maximum Collector Dissipation (Watts)	Typical Forward Current Gain	Typical Freq (MHz)	Package Style (hover over image for larger view)
NPN	PNP		BV_CBO	BV_CEO	I_C	P_D	h_FE	f_T
103A	102A	Pwr Output, Driver, Sw	32	32	1	0.65	63 Min	2.3	TO1 TO1
-	158	Audio Pwr Amp	32	32	1	1.6	90	1.5	TO1 TO1
-	27	High Current Amp	60	45	60	170	120	2kHz	TO3 TO3
-	104	Audio Pwr Amp	50	35	10	90	90	300kHz
-	121	Audio Pwr Amp	60	45 (CER)	10	90	90	300kHz
-	179	Audio Pwr Amp	90	90 (CEV)	25	106	55 Min	0.35 Min
-	127	Amp, Pwr Output, Horiz & Vert Defl	350	350 (CES)	10	56	15 Min	1
101	100	OSC Mixer for AM Radio Medium Speed Sw	25	25/24	0.3/0.1	0.15	100	-	TO5 TO5
103	102	Pwr Output, Driver, Sw	30/25	16/ 24 (CES)	0.25/0.15	0.15	90	2/-	TO5 TO5
-	126A	RF-IF Amp, Mixer, High Speed Sw	15	15	0.05	300	40	250	TO18 TO18
-	126	RF-IF Amp, TV, Radio, High Speed Sw	25	18	0.2	0.2	60	250	TO18 TO18
-	105	Audio Pwr Amp	40	40 (CES)	15 (I_E)	150 **	20	10kHz	TO36 TO36
-	213	High Pwr, High Gain Amp	75	60	30	170 **	75	2.7kHz
-	330	High Pwr Sw for Motor Drive Controls and Low Loss Reg	50	40	25	87.5 **	15 Min	4kHz
-	176	Audio Pwr Amp	25	25	2	6	110	0.7	TO39 TO39
155	131	Audio Pwr Amp	32	20	3 Peak	6 *	110	1	TO66 (Japanese) TO66 (Japanese)
-	226	AF Pwr Output	35	35	2	12	125	0.45	TO66 (Japanese) TO66 (Japanese)
-	28	High Current Amp	60	45	60	170	120	2kHz	TO68 TO68
-	160	RF-IF Amp, FM Mixer	20 (CES)	15	0.01	0.06	50	700	TO72 TO72

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Transistors

Germanium Transistor Selection Guide