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BC546 THRU BC549
Small Signal Transistors (NPN)
TO-92
.181 (4.6) min. .492 (12.5) .181 (4.6) .142 (3.6)

♦ NPN Silicon Epitaxial Planar Transistors ♦ These transistors are subdivided into threegroups
A, B and C according to their current gain. The type BC546 is available in groups A and B, however, the types BC547 and BC548 can be supplied in all three groups. The BC549 is a low-noise typeand available in groups B and C. As complementary types, the PNP transistors BC556 … BC559 are recommended.

FEATURES

max. ∅ .022 (0.55) .098 (2.5) C B E

♦ On special request, thesetransistors are also
manufactured in the pin configuration TO-18.

MECHANICAL DATA
Case: TO-92 Plastic Package Weight: approx. 0.18 g

Dimensions in inches and (millimeters)

MAXIMUM RATINGS ANDELECTRICAL CHARACTERISTICS
Ratings at 25 °C ambient temperature unless otherwise specified

Symbol Collector-Base Voltage BC546 BC547 BC548, BC549 BC546 BC547 BC548, BC549 BC546 BC547 BC548, BC549 BC546,BC547 BC548, BC549 VCBO VCBO VCBO VCES VCES VCES VCEO VCEO VCEO VEBO VEBO IC ICM IBM –IEM Ptot Tj TS

Value 80 50 30 80 50 30 65 45 30 6 5 100 200 200 200 5001) 150 –65 to +150

Unit V V V V V VV V V V V mA mA mA mA mW °C °C

Collector-Emitter Voltage

Collector-Emitter Voltage

Emitter-Base Voltage Collector Current Peak Collector Current Peak Base Current Peak Emitter Current PowerDissipation at Tamb = 25 °C Junction Temperature Storage Temperature Range
1)

Valid provided that leads are kept at ambient temperature at a distance of 2 mm from case

4/98

BC546 THRU BC549ELECTRICAL CHARACTERISTICS
Ratings at 25 °C ambient temperature unless otherwise specified

Symbol h-Parameters at VCE = 5 V, IC = 2 mA, f = 1 kHz, Small Signal Current Gain

Min.

Typ.Max.

Unit

Current Gain Group A B C Current Gain Group A Input Impedance B C Output Admittance Current Gain Group A B C
Reverse Voltage Transfer Ratio

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