NTE121
Germanium PNP Transistor
Audio Frequency Power Amplifier
Description:
The NTE121 is a Germanium PNP Alloy Junction transistor in a TO3 type package designed as an
audio frequency power output amplifier.
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Collector−Base Voltage, VCBO 60V.......................................................
Collector−Emitter Voltage (RBE = 68Ω), VCER 45V..........................................
Emitter−Base Voltage, VEBO 10V.........................................................
Collector Current, IC10A................................................................
Emitter Current, IE10A..................................................................
Base Current, IB3A....................................................................
Power Dissipation (TC ≤ +55°C), PD90W.................................................
Operating Junction Temperature, TJ+100°C...............................................
Storage Temperature Range, Tstg −55° to +100°C..........................................
Note 1. Matched pairs are available upon request (NTE121MP). Matched pairs have their gain
specification (hFE) matched to within 10% of each other.
Electrical Characteristics: (TA = +25°C unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Collector−Emitter Breakdown Voltage V(BR)CER IC(peak) = −0.6A, RBE = 68Ω45 − − V
Collector Cutoff Current ICBO VCB = 30V, IE = 0 − − 0.5 mA
DC Current Gain hFE VCE = 2V, IC = 1A 50 90 165
Base−Emitter Input Voltage VBE VCE = 2V, IC = 1A −0.38 −V
Collector−Emitter Saturation Voltage VCE(sat) IC = 10A, IB = 1A −0.3 −V
Transition Frequency fTVCB = 2V, IE = 1A −300 −kHz
Rev. 8−12
1.187 (30.16)
.875 (22.2)
Dia Max
.665
(16.9)
.430
(10.92)
Seating
Plane
.040 (1.02).312 (7.93) Min
.135 (3.45) Max
.350 (8.89)
Emitter
Collector/CaseBase
.215 (5.45)
.525 (13.35) R Max
.156 (3.96) Dia
(2 Holes)
.188 (4.8) R Max
