Transistor BF127 NPN RF TO-7

Transistor BF127 NPN RF TO-7

Transistor BF127 NPN RF TO-7

Transistor BF127 NPN RF TO-7

Transistor BF127 NPN RF TO-7

Transistors

Reference: TRBF127

Part.No: BF127

€1.20

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The BF127 is an NPN Silicon RF/IF transistor in a TO-7 metal can package, designed for high-frequency amplification in radio receivers and tuner stages.

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Description
Product Details

BF127 RF/IF Transistor - Reliable High-Frequency Amplification

The BF127 is a silicon NPN small-signal transistor built specifically for RF and IF amplifier stages in vintage and classic radio receivers. Its metal TO-7 can helps with thermal and RF shielding characteristics, making it a common choice for restoring or repairing tuner and IF circuits in older telecommunications equipment.

Functions & Applications

High Transition Frequency (ft ≈ 175 MHz): Suitable for RF amplification and local oscillator stages.
Metal TO-7 Can: Offers improved shielding and heat dissipation compared to plastic packages.
Low Collector Capacitance: Reduces signal loss and improves stability at high frequencies.
Restoration-Friendly: A practical silicon replacement for aging germanium RF stages in vintage radios (with re-biasing).

Technical Specifications

Parameter	Value / Specification
Transistor Type	BJT (Bipolar Junction Transistor)
Polarity / Channel	NPN
Package / Case	TO-7
Collector-Emitter Voltage (Vceo)	30V
Collector-Base Voltage (Vcbo)	40V
Max Collector Current (Ic)	25mA
Power Dissipation (Pc)	0.33W
Transition Frequency (ft)	175 MHz
Forward Current Gain (hFE, min)	30

Frequently Asked Questions

Q: What is the BF127 used for?
A: It is a silicon NPN RF/IF transistor intended for high-frequency amplifier and oscillator stages in radio receivers, with a max Ic of 25mA and ft of ~175MHz.

Q: Can the BF127 replace a germanium (AF-series) RF transistor in an old radio?
A: Only after re-biasing the circuit: silicon devices like the BF127 need a Base-Emitter voltage of ~0.6-0.7V, while germanium types need only ~0.2-0.3V.

Notes

Legacy/vintage RF transistor, mainly stocked for repair and restoration of classic radio receivers rather than new designs.

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: NPN
Transistor Case Style: TO-7
TO-72

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