Product Overview
Motorola MJ490 Silicon PNP Power Transistor in a TO-3 (TO-204AA) Case, 40 V, 4 A
Condition
Unused new old stock (NOS). Markings legible: Motorola logo, MJ490. Sold each.
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Product Overview
Motorola's MJ490 is a PNP silicon power transistor in the two-pin TO-3 metal can, rated 40 V collector-emitter and 4 A collector current.
Key Features
- Polarity: PNP
- Material: silicon
- V(BR)CEO: 40 V
- Collector current (IC): 4 A
- Package: TO-3 (TO-204AA) metal can, two pins
- Terminals: emitter and base on the pins, collector on the case
Applications
- Replacing an MJ490 in equipment built around that number
- Bench builds that need a PNP high-side switch or linear pass stage in a bolt-down metal case
Frequently Asked Questions
Which terminal is the collector?
The metal case. The two pins are the emitter and the base, so the heatsink sits at collector potential unless the case is insulated from it.
Is the MJ490 silicon or germanium?
Silicon, PNP. It is not one of the germanium alloy types that share the same TO-3 outline, so it does not take a germanium bias setting unchanged.
A TO-3 can carries its whole identity on the cap, here a Motorola logo and MJ490. The old can's cap settles the match before anything gets unbolted.
