Product Overview
STMicroelectronics TIP31C silicon NPN power transistor, 100 V 3 A 40 W, TO-220 tab-mount case
Condition
Unused new old stock (NOS). Markings legible: ST logo, TIP31C.
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Product Overview
A silicon NPN power transistor in the three-lead TO-220 package, marked TIP31C with the ST logo. STMicroelectronics rates it at 100 V collector-emitter, 3 A continuous collector current and 40 W dissipation with the case at 25 C, built on its base island process.
Key Features
- Polarity: NPN, silicon
- Collector-base voltage (VCBO): 100 V
- Collector-emitter voltage (VCEO): 100 V
- Emitter-base voltage (VEBO): 5 V
- Collector current (IC): 3 A continuous, 5 A peak (ICM)
- Total dissipation: 40 W at case temperature 25 C
- Package: TO-220, three leads, metal tab with mounting hole
Applications
- Low-side switch for relay coils, solenoids, lamps and small DC motors driven from a logic or microcontroller pin through a base resistor
- Output and driver stages in linear audio amplifiers
- Pass element in a discrete linear power supply, bolted to a heatsink
Frequently Asked Questions
Is this the 100 V version of the TIP31?
Yes. The TIP31C is rated 100 V collector-emitter and 100 V collector-base, with 3 A continuous and 5 A peak collector current.
Does it need a heatsink?
For anything near its power rating, yes. The 40 W figure holds with the case at 25 C, so the heatsink under the tab sets how much it can really dissipate.
What is the PNP complement to the TIP31C?
The TIP32C. It is the PNP partner for push-pull output stages built around the TIP31C.
ST logo, TIP31C, three leads and a tab with a hole in it: the TO-220 NPN that has been clicking relays and driving speakers on workbenches for decades. Bolt it to some aluminum and hand it a load.
