General view

2N2891

IPRS Băneasa

Year
Unknown
Category
Components
Type
Transistors
Documentation score
1/5
Last edited
05 OCT 2026

Specifications

Material
Si
Polarity
NPN
Max. power dissipation (Pc, Ptot, Pd)
5 W
Max. collector–emitter voltage |Vce|
80 V
Max. emitter–base voltage |Veb|
5 V
Max. collector current |Ic|
0.8 A
Max. junction temperature (Tj)
200 °C
Transition frequency (ft)
30 MHz
DC current gain (hFE), min
50
DC current gain (hFE), max
100
Collector–emitter saturation voltage (Vce sat)
0.5 V
Collector cut-off current (Icbo)
100 µA
Package
TO-39
Application
low frequency, medium power

Sources: [1]

Description

The 2N2891 is a low-frequency, medium-power silicon NPN transistor listed in the Agenda radioelectronistului (2nd edition, 1989) among the bipolar transistors made in Romania by IPRS Băneasa, in a TO-39 package [1].

Coded as (JEDEC system) [2]:

Part Meaning
2 device with 3 electrodes (transistor, thyristor etc.)
N semiconductor device
2891 identification number (01–9999)

hFE (h21E) measured at IC = 1000 mA; ft at IC = 200 mA; Vce sat at IC = 1000 mA; Icbo at VCB = 100 V; characteristics at Tamb = 25 °C [1].

The Agenda lists the 2N2891 a second time, marked as a CCSIT-CE component (ICCE), in the table of silicon NPN switching transistors, with these values: VCEO = 80 V, Ptot = 500 mW, Vce sat = 0.5 V at IC = 1000 mA, hFE (h21E) = 50…150 at IC = 1000 mA, VCE = 1 V, ton = 300 ns, toff = 1500 ns, TO-39 package (collector connected to the case) [3]. The specifications above are those of the medium-power table.

Gallery

IPRS Băneasa 2N2891: TO-39 pinout (collector connected to the case)No image available
TO-39 pinout (collector connected to the case)

Documents

No documents available yet.

References

  1. [1]N. Drăgulănescu – „Agenda radioelectronistului”, 2nd edition, Editura Tehnică, 1989, section 28.2.8 „Tranzistoare cu siliciu, NPN, de joasă frecvență, medie putere”, p. 527
  2. [2]N. Drăgulănescu – „Agenda radioelectronistului”, 2nd edition, Editura Tehnică, 1989, section 26.3 „Sistemul american JEDEC”, p. 480
  3. [3]N. Drăgulănescu – „Agenda radioelectronistului”, 2nd edition, Editura Tehnică, 1989, section 28.2.18 „Tranzistoare cu siliciu, NPN, de comutație”, p. 541