Product Overview
Philips ECG-94 NPN Silicon High-Voltage Power Transistor 100W TO-3
Condition
New old stock. Package includes factory-supplied mica insulator. Transistor can is marked P312 ECG94 C8732.
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Product Overview
The Philips ECG-94 is a silicon NPN high-voltage power transistor housed in a standard TO-3 metal package. Engineered for high-voltage general purpose amplifier stages and linear power regulation, it handles collector-emitter voltages up to 300V with a continuous collector current rating of 5A and 100W total power dissipation. It serves as an exact service replacement for vintage audio amplifiers, industrial power supplies, deflection circuits, and bench test equipment.
Key Features
- Polarity: NPN Silicon
- Package Type: TO-3 metal can
- Collector-Emitter Voltage (VCEO): 300V
- Collector-Base Voltage (VCBO): 300V
- Emitter-Base Voltage (VEBO): 5V
- Continuous Collector Current (IC): 5A
- Total Power Dissipation (PD): 100W
- Transition Frequency (fT): 2.5 MHz
- DC Current Gain (hFE): 30 minimum
- Pinout: Base and emitter lead pins, case-connected collector
Applications
- Replacing failed output and driver transistors in vintage solid-state audio amplifiers and receivers
- Servicing linear DC power supply regulator stages and CRT deflection circuits
- Bench power supply builds and high-voltage hobbyist bench regulator circuits
Frequently Asked Questions
What hardware is included with this transistor?
This unit includes the mica mounting insulator.
Is the collector pin isolated from the metal case?
No. On standard TO-3 transistors of this type, the collector is electrically tied directly to the metal casing. The included mica insulator provides the necessary electrical isolation when mounting to a grounded heatsink.
Why purchase an individual piece instead of sourcing an assorted surplus lot?
Assorted surplus lots often contain pulled, counterfeit, or misidentified TO-3 transistors with questionable lineage. Sourcing a verified, photographed Philips ECG component guarantees the exact physical pinout and specifications needed to complete your repair without gambling on unknown silicon. Shipping is a flat $8 rate, free on orders over $28, and packages ship from our Idaho warehouse the same or next business day.
Solid metal-can silicon from the golden era of repairable electronics, ready to put an honest circuit back to work. Mount it up with the insulator, torque down the screws, and let the music play.
