Transistor AF127 PNP, Germanium TO-72

Transistor AF127 PNP, Germanium TO-72

Transistor AF127 PNP, Germanium TO-72

Transistor AF127 PNP, Germanium TO-72

Transistor AF127 PNP, Germanium TO-72

Transistors

Reference: TRAF127

Part.No: AF127

€1.40

In Stock

Immediate Dispatch

The AF127 is a vintage PNP germanium transistor in a TO-72 package with shield lead. Engineered as a direct replacement for the AF117, it eliminates tin whisker risk while delivering identical RF and IF amplification performance for radio restoration and vintage audio circuits.

Add to cart

Subscribe To When In Stock

You have successfully subscribed to this product

Description
Product Details

AF127 Germanium PNP Transistor – Direct AF117 Replacement, Tin Whisker Free

The AF127 is a reliable vintage PNP germanium transistor, purpose-built for IF and RF amplification in radio and audio equipment. As a direct replacement for the notorious AF117, it eliminates the tin whisker failure mode while preserving identical electrical characteristics, making it the preferred choice for restoring vintage radios and amplifiers.

Functions & Applications

Direct AF117 Replacement: Identical performance, zero tin whisker risk—the modern solution for vintage radio restoration.
Shielded TO-72 Package: 4-lead design with integrated shield for minimal noise and optimal RF isolation.
Germanium Construction: Delivers the warm, low-noise characteristics prized in classic audio and radio circuits.
IF/RF Optimized: Engineered for intermediate and radio frequency amplification in vintage equipment.

Technical Specifications

Parameter	Value / Specification
Transistor Type	BJT (Bipolar Junction Transistor)
Polarity / Channel	PNP
Package / Case	TO-72
Mounting Type	Through-Hole (THT), 4-lead with shield
Primary Application	IF & RF Amplification

Frequently Asked Questions

Q: Is AF127 a direct drop-in for AF117?
A: Yes. The AF127 was designed as a direct replacement for the AF117, with identical electrical characteristics and pinout. It eliminates the tin whisker failure mode that plagued the original AF117.

Q: What makes the AF127 different from other AF12x series transistors?
A: The AF127 shares close tolerances across the AF12x family (AF125, AF126, AF127), so substitution is often possible. However, the AF127 specifically replaces the AF117 to avoid tin whisker defects.

Notes

Vintage germanium transistor. Original AF117 parts are prone to tin whisker shorts; AF127 is the modern, whisker-free alternative. Requires proper heatsinking if dissipating significant power.

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-72

16 other products in the same category:

Transistor BC516 PNP, 30V, TO-92

Transistors

Transistor BC516 PNP, 30V, TO-92

Reference:

TRBC516

In Stock

Transistor AC116K PNP Germanium

Transistors

Transistor AC116K PNP Germanium

Reference:

TRAC116K

The AC116K is a PNP Germanium audio frequency transistor. The "K" suffix denotes its built-in metal heatsink block.

Last items in stock

Power Transistor BF457 NPN, 160V TO-126

Transistors

Power Transistor BF457 NPN, 160V TO-126

Reference:

TRBF457

The BF457 is a high-voltage NPN power transistor in a TO-126 package, purpose-designed for video output stages and CRT display drivers. Rated for 160V, it handles the demanding switching and amplification requirements of color cathode (RGB) circuits in television and monitor neck boards.

Last items in stock

Transistor 2N2222

Transistors

Transistor 2N2222 NPN, 0.8A TO-18

Reference:

TR2N2222

The 2N2222 is a classic NPN Bipolar Junction Transistor (BJT) in a TO-18 metal-can package. Designed for high-speed switching and general-purpose linear amplification in hobbyist, educational and vintage-style circuits.

In Stock

Power Transistor BD243 NPN, 6A TO-220

Transistors

Power Transistor BD243 NPN, 6A TO-220

Reference:

TRBD243

The BD243 is a high-current NPN Power Transistor in a TO-220 package, engineered for audio power amplifiers, voltage regulators, and motor control circuits. Renowned for reliability and thermal stability in demanding applications.

Last items in stock

Power Transistor BD646 PNP Darlington, TO-220

Transistors

Power Transistor BD646 PNP Darlington, TO-220

Reference:

TRBD646

The BD646 is a PNP Darlington transistor in a TO-220 package, engineered for high-current switching and motor control applications. Its internal Darlington configuration delivers exceptional current gain, enabling direct load driving from weak logic signals.

Last items in stock

Power Transistor 2SC1173 NPN, 3A TO-220

Transistors

Power Transistor 2SC1173 NPN, 3A TO-220

Reference:

TR2SC1173

The 2SC1173 is a reliable NPN power transistor in a TO-220 package, optimized for low-frequency audio amplification and relay driving applications. Its robust design and easy heatsink mounting make it ideal for continuous-duty power stages.

Last items in stock

Transistor BD137 NPN, 60V, 1.5A, 12W, TO-126

Transistors

Power Transistor BD137 NPN, 1.5A TO-126

Reference:

TRBD137

The BD137 is an NPN power BJT transistor in a TO-126 package, rated for 60V and 1.5A. Commonly used in audio amplifier driver stages, voltage regulators and low-power switching circuits.

In Stock

Transistor BD234 PNP, 45V, 2A, 25W, TO-126

Transistors

Power Transistor BD234 PNP, 2A TO-126

Reference:

TRBD234

The BD234 is a PNP power BJT transistor in a TO-126 package, rated for 45V and 2A. Suited for audio output stages, motor control and general-purpose power switching in DIY and repair projects.

Last items in stock

Transistor BC267 NPN, 45 V, 1A, 375mW, TO-18

Transistors

Transistor BC267 NPN, 1A TO-18

Reference:

TRBC267

The BC267 is an NPN Bipolar Junction Transistor (BJT) in a metal TO-18 package, rated for up to 1A collector current. Suitable for switching and small-signal amplification tasks that require higher current handling than typical small-signal transistors.

Last items in stock

Transistor 2N3709

Transistors

Transistor 2N3709 NPN, 30mA TO-92

Reference:

TR2N3709

The 2N3709 is a silicon NPN Bipolar Junction Transistor (BJT) in a TO-92 package, designed for low-level, high-gain audio-frequency amplification and small-signal switching.

Last items in stock

Power Transistor BD829 NPN, TO-220

Transistors

Power Transistor BD829 NPN, TO-220

Reference:

TRBD829

The BD829 is a robust NPN Power Bipolar Junction Transistor (BJT) in a TO-220 package. Engineered for audio amplifier driver and output stages, linear voltage regulators, and high-current switching applications where thermal management is critical.

In Stock

Power Transistor BD437 NPN, 8A TO-126

Transistors

Power Transistor BD437 NPN, 8A TO-126

Reference:

TRBD437

The BD437 is a high-current NPN Power Transistor in a TO-126 package. With a maximum collector-emitter voltage of 45V and collector current up to 8A, it is ideal for medium-power amplification stages and output drivers in audio and switching applications.

In Stock

Transistor BF257 NPN, 160V TO-39

Transistors

Transistor BF257 NPN, 160V TO-39

Reference:

TRBF257

The BF257 is a high-voltage NPN Bipolar Junction Transistor (BJT) in a TO-39 metal can package. Designed for CRT display driver circuits and other high-voltage switching applications requiring robust thermal management.

In Stock

Power Transistor AD149 PNP, TO-3

Transistors

Power Transistor AD149 PNP, TO-3

Reference:

TRAD149

The AD149 is a classic PNP Germanium Power Transistor in a TO-3 package. Designed for high-current amplification and audio power amplifier output stages where reliability and thermal management are critical.

In Stock

Transistor BC264 NPN, 200mA, 30V, TO-92

Transistors

Transistor BC264 NPN, 200mA TO-92

Reference:

TRBC264

The BC264 is an NPN Bipolar Junction Transistor (BJT) in a TO-92 package, rated for 200mA collector current and 30V. Suitable for small-signal switching and low-power amplification in general-purpose electronics.

In Stock

Product added to wishlist

Product added to compare.