Product Overview
Motorola MJ480 NPN Power Transistor in a TO-3 Metal Can, Date Code 7413
Condition
New, unused old stock. The photographs show the actual parts. The can face carries the Motorola M logo over MJ480 and the date code 7413, read as a 1974 build. The steel mounting flange is stamped with the factory marks 352, 405 and A8. Plating is dull with light surface scuffing from long storage, and the two pins on the underside are straight inside their green glass seals, tarnished a continuous dark brown over the full protruding length with only the extreme tips bright bare metal, and with no solder anywhere on them. Nothing on the flange or the mounting holes suggests the part was ever bolted down. Photographed loose in a molded foam carrier alongside other pieces of the same date code. No mounting hardware, insulator or original box is shown.
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Product Overview
The MJ480 is a Motorola NPN power transistor in the classic TO-3 metal can, listed here at 40V, 4A and 5W. Two leads come through the underside of the diamond-shaped flange, stamped B for base and E for emitter, with the case serving as the collector in the standard two-lead TO-3 arrangement, so the device bolts through its two mounting holes and dumps heat straight into the heatsink. This is a bolt-down part from the years before plastic-package power devices took over the bench, and the markings that matter are all crisp in the photos: Motorola M logo, MJ480, 7413. Ratings beyond the 40V, 4A and 5W carried on this listing are not confirmed here - check the MJ480 datasheet against your design before you commit the part.
Key Features
- Part number: Motorola MJ480, stamped on the can
- Type: NPN bipolar power transistor
- Collector-emitter voltage: 40V as listed
- Collector current: 4A as listed
- Power dissipation: 5W as listed
- Package: TO-3 metal can with two-hole diamond mounting flange
- Pinout: underside stamped B and E, case is the collector per the standard two-lead TO-3 arrangement
- Date code: 7413 on the can face, read as 1974
- Flange marks: factory stamps 352, 405 and A8 visible in the photos
- Condition: New, unused old stock, sold as a single transistor
- Gain, frequency and thermal derating figures: not confirmed - verify against the datasheet before use
Applications
- Audio technician rebuilding a 1970s solid-state output stage that was laid out around an MJ-series TO-3 device
- Bench tech repairing the pass element in a legacy linear supply inside older industrial equipment
- Restorer who wants a period-correct date-coded Motorola part rather than a modern substitute in a display-grade rebuild
- Hobbyist building a discrete power stage who would rather bolt a metal can to a heatsink than trust a plastic tab
Frequently Asked Questions
What do all the numbers stamped on this transistor mean?
MJ480 is the part number and 7413 is the date code, read as the thirteenth week of 1974. The M above them is the Motorola logo. The 352, 405 and A8 stamped into the mounting flange are factory marks, not part of the part number, so do not search on them.
Which lead is which on the underside?
The flange is stamped B next to one pin and E next to the other, and in the standard two-lead TO-3 arrangement the case itself is the collector. Confirm the pinout with a meter and the datasheet before you wire it in.
Are 40V, 4A and 5W the complete ratings?
Those are the ratings this listing carries and all we will state. Gain, switching behavior and thermal derating are not confirmed on our end. If your design lives near a limit, pull the MJ480 datasheet and work from that.
The photos show several transistors. How many do I get?
The pictures were taken with a group of pieces from the same 7413 date code sitting together in their foam carrier. This listing is for one transistor.
Why buy this single MJ480 here instead of chasing a surplus lot or an auction pallet?
Because you can see exactly what you are getting before you spend anything. This is one transistor, photographed close enough to read the part number and the date code, with its condition described the way it actually looks instead of a bag of unmarked pulls you have to sort, test and mostly throw away. One known piece for one repair, no lot to store. Shipping is $8 flat rate and free once your order passes $28, and orders leave our Idaho warehouse the same or next business day.
A 1974 date code under a Motorola M, still sitting in its foam with the plating dull and the pins never soldered. Bolt it to a heatsink and give it the working life it has been waiting half a century to start.
