Product Overview
Motorola MPSU10 300V 500mA NPN Silicon BJT Video Amplifier Driver
Condition
Unused new old stock (NOS). Gold-plated leads are straight and untinned, with intact gold plating across the mounting tab. Body markings legible: MMPS U10 with Motorola logo; rear heatsink tab stamped with B and E terminal identifiers.
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Product Overview
Motorola MPSU10 is an NPN silicon bipolar power transistor housed in a TO-202 Uniwatt package, designed for high-voltage audio driver and video amplifier stages. Rated for 300V collector-emitter breakdown and 500mA continuous collector current, it features vintage gold-plated leads and an integral heatsink tab.
Key Features
- Collector-emitter breakdown voltage (VCEO): 300 V
- Continuous collector current (IC): 500 mA (0.5 A)
- Total device dissipation (PD): 10 W at 25°C case temperature
- Transition frequency (fT): 45 MHz
- Package: TO-202 (Motorola Case 152-02 / Uniwatt) with gold-plated tab and leads
- Pinout: Pin 1 Emitter, Pin 2 Base, Pin 3 Collector (collector common to mounting tab)
Applications
- Restoring vintage CRT video drive stages and oscilloscope deflection circuits
- Driver stages in high-voltage solid-state audio power amplifiers
- Custom bench supplies and tube-solid-state hybrid audio builds
Frequently Asked Questions
What is the lead pinout for the MPSU10?
Facing the front marked side with leads pointing down, the pin arrangement from left to right is pin 1 (emitter), pin 2 (base), and pin 3 (collector). The rear of the tab is stamped with B and E over the base and emitter terminals.
Is the heatsink tab electrically isolated on the MPSU10?
The gold-plated mounting tab is electrically connected to pin 3 (collector). Mounting to an external chassis or grounded heatsink requires an insulating washer and bushing.
What parts directly interchange with the MPSU10?
Direct crosses include Central Semiconductor CEN-U10, as well as service replacements ECG191, NTE191, and SK3232.
Gold leads and a solid tab from the golden age of discrete silicon. Drop it into that vintage audio or deflection board and let the circuit run clean.
