2N4948 Datasheet Text
2N4948, 2N4949
High-reliability discrete products and engineering services since 1977
PN UNIJUNCTION TRANSISTORS
Features
- Available as “HR” (high reliability) screened per MIL-PRF-19500, JANTX level. Add “HR” suffix to base part number.
- Available as non-RoHS (Sn/Pb plating), standard, and as RoHS by adding “-PBF” suffix.
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
RMS power dissipation(1)
PD 360 mW
RMS emitter current Peak pulse emitter current(2)
Ie 50 mA ie 1.0 Amp
Emitter reverse voltage
VB2E 30 Volts
Storage temperature range
Tstg -65 to 200 °C
Note 1: Derate 2.4mW/°C increase in ambient temperature. Total power dissipation must be limited by external circuitry. Interbase voltage limited by power dissipation: V B2B1 = √(RBB- PD) Note 2: Capacitance discharge current must fail to 0.37A within 3.0ms and PRR ≤ 10PPS.
ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise specified)
Characteristic
Symbol
Min
Typ
Max Unit
Intrinsic...
