Transistor 2SB171 PNP, TO-1

Transistor 2SB171 PNP, TO-1

Transistors

Reference: TR2SB171

Part.No: 2SB171

€1.00

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The 2SB171 is a classic PNP Germanium Bipolar Junction Transistor (BJT) in a TO-1 metal can package. A reliable choice for restoring vintage radios, amplifiers and audio equipment where germanium transistors are original to the design.

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Description
Product Details

2SB171 Germanium PNP Transistor – Classic Component for Vintage Electronics Repair

The 2SB171 is a genuine PNP germanium transistor, recognized by enthusiasts and technicians as an essential replacement component for vintage radios, tube-era amplifiers and retro audio equipment. Its soft gain roll-off and warm signal characteristics make it prized for authentic restoration work.

Functions & Applications

Germanium Technology: Authentic vintage characteristic with warm signal response, ideal for period-correct repairs.
PNP Polarity: Complementary to NPN germanium types; check original circuit polarity before replacement.
TO-1 Metal Can: Sturdy through-hole package typical of 1960s–70s vintage equipment.
Direct Replacement: Suitable as an original-equipment substitute in legacy radio and amplifier designs.

Technical Specifications

Parameter	Value / Specification
Transistor Type	BJT (Bipolar Junction Transistor)
Polarity / Channel	PNP
Package / Case	TO-1
Collector-Emitter Voltage (Vceo)	20V
Transistor Type	PNP Germanium
Mounting Type	Through-Hole (THT)

Frequently Asked Questions

Q: Is the 2SB171 compatible with modern silicon circuits?
A: The 2SB171 is primarily intended for replacement in original germanium designs. It can be adapted to modern circuits with caution, but forward voltage drop and temperature characteristics differ from silicon transistors.

Q: What is the complementary NPN germanium counterpart?
A: The corresponding NPN germanium transistor is the 2SA171 (or 2SA173 for similar specs), commonly paired in push–pull vintage amplifier stages.

Notes

Vintage germanium part (NOS stock). Lower Vceo than modern silicon BJTs; forward voltage drop ~0.2–0.3V (lower than silicon ~0.7V). Temperature coefficient and gain drift differ from silicon; verify circuit tolerance before use in critical applications.

Note: Price refers to one (1) piece. The component is shipped in bulk without individual packaging.

Transistor Type: BJT (Bipolar Junction Transistor)
Transistor Polarity / Channel: PNP
Transistor Case Style: TO-1

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