Part Details for MJE521 by STMicroelectronics
Results Overview of MJE521 by STMicroelectronics
- Distributor Offerings: (1 listing)
- Number of FFF Equivalents: (1 replacement)
- CAD Models: (Request Part)
- Number of Functional Equivalents: (6 options)
- Part Data Attributes: (Available)
- Reference Designs: (Not Available)
Tip: Data for a part may vary between manufacturers. You can filter for manufacturers on the top of the page next to the part image and part number.
MJE521 Information
MJE521 by STMicroelectronics is a Power Bipolar Transistor.
Power Bipolar Transistors are under the broader part category of Transistors.
A transistor is a small semiconductor device used to amplify, control, or create electrical signals. When selecting a transistor, factors such as voltage, current rating, gain, and power dissipation must be considered, with common types. Read more about Transistors on our Transistors part category page.
Price & Stock for MJE521
| Part # | Distributor | Description | Stock | Price | Buy | |
|---|---|---|---|---|---|---|
|
|
Bristol Electronics | 2 |
|
RFQ |
Part Details for MJE521
MJE521 CAD Models
MJE521 Part Data Attributes
|
|
MJE521
STMicroelectronics
Buy Now
Datasheet
|
Compare Parts:
MJE521
STMicroelectronics
4A, 40V, NPN, Si, POWER TRANSISTOR, TO-126
Select a part to compare: |
| Pbfree Code | Yes | |
| Rohs Code | Yes | |
| Part Life Cycle Code | Obsolete | |
| Ihs Manufacturer | STMICROELECTRONICS | |
| Reach Compliance Code | not_compliant | |
| ECCN Code | EAR99 | |
| HTS Code | 8541.29.00.95 | |
| Case Connection | ISOLATED | |
| Collector Current-Max (IC) | 4 A | |
| Collector-Emitter Voltage-Max | 40 V | |
| Configuration | SINGLE | |
| DC Current Gain-Min (hFE) | 40 | |
| JEDEC-95 Code | TO-126 | |
| JESD-30 Code | R-PSFM-T3 | |
| JESD-609 Code | e3 | |
| Number of Elements | 1 | |
| Number of Terminals | 3 | |
| Operating Temperature-Max | 150 °C | |
| Package Body Material | PLASTIC/EPOXY | |
| Package Shape | RECTANGULAR | |
| Package Style | FLANGE MOUNT | |
| Polarity/Channel Type | NPN | |
| Power Dissipation Ambient-Max | 40 W | |
| Power Dissipation-Max (Abs) | 40 W | |
| Qualification Status | Not Qualified | |
| Surface Mount | NO | |
| Terminal Finish | MATTE TIN | |
| Terminal Form | THROUGH-HOLE | |
| Terminal Position | SINGLE | |
| Transistor Application | SWITCHING | |
| Transistor Element Material | SILICON |
Alternate Parts for MJE521
This table gives cross-reference parts and alternative options found for MJE521. The Form Fit Function (FFF) tab will give you the options that are more likely to serve as direct pin-to-pin alternates or drop-in parts. The Functional Equivalents tab will give you options that are likely to match the same function of MJE521, but it may not fit your design. Always verify details of parts you are evaluating, as these parts are offered as suggestions for what you are looking for and are not guaranteed.
| Part Number | Manufacturer | Composite Price | Description | Compare |
|---|---|---|---|---|
| MJE521 | TT Electronics Resistors | Check for Price | Power Bipolar Transistor, 4A I(C), 40V V(BR)CEO, 1-Element, NPN, Silicon, Plastic/Epoxy, 3 Pin, TO-127VAR, 3 PIN | MJE521 vs MJE521 |
MJE521 Frequently Asked Questions (FAQ)
-
The MJE521 can operate safely between -65°C to 150°C, but the recommended operating temperature range is -40°C to 125°C for optimal performance.
-
To ensure linear operation, the MJE521 should be biased with a base-emitter voltage (VBE) between 0.6V to 0.8V, and a collector-emitter voltage (VCE) greater than 1V. Additionally, the base current should be limited to prevent overheating.
-
The maximum collector current rating for the MJE521 is 10A, but it's recommended to derate the current to 5A or less for continuous operation to ensure reliability and prevent overheating.
-
Yes, the MJE521 can be used as a switch, but it's essential to ensure the transistor is fully saturated (VCE < 0.5V) to minimize power dissipation. Additionally, consider the switching frequency, as high-frequency switching can lead to increased power losses and reduced reliability.
-
To protect the MJE521 from ESD, handle the device by the body, avoid touching the pins, and use an anti-static wrist strap or mat. Additionally, ensure the PCB design includes ESD protection components, such as TVS diodes or resistors, to prevent voltage spikes.