Bipolar (BJT) Transistor NPN 40V 4A 40W Through Hole SOT-32-3
4A 40V NPN BJT Power Transistor TO-126 Product overview: MJE521 from STMicroelectronics is a Bipolar Transistor for signal amplification, switching, driver stages, discrete power control, and general electronic circuit design. It is useful for engineers and buyers comparing datasheets, replacement parts, BOM lines, package options, lifecycle status, and procurement availability. Key searchable attributes include 4A, 40V. Search-friendly keywords include transistor, BJT, switching, amplification, 4A, 40V, Bipolar Transistor, Single Bipolar Transistors. This listing supports clearer product discovery for industrial, commercial, repair, automation, power, sensing, and embedded system projects. Product number 276-MJE521 can be used for catalog matching and distributor lookup.
Manufacturer: STMicroelectronics
Win Source Part Number: 137681-MJE521
Packaging: Tube/Rail
Mounting: Through Hole
Transistor Polarity: NPN
Categories: Discrete Semiconductor Products
Status: Obsolete(EOL)
Temperature Range - Operating: 150°C (TJ)
Case / Package: SOT-32-3
Maximum Current Collector: 4A
VCEO Maximum Collector-Emitter Breakdown Voltage: 40V
Collector Cut-off Current(Max): 100μA (ICBO)
Typical Gain (hFE) (Min): 40 @ 1A, 1V
Maximum Power Dissipation: 40W
Alternative Parts (Cross-Reference): MJE521G; MJE521; MJE521 Lead Free; MJE521;
Popularity: Medium
Fake Threat In the Open Market: 30 pct.
Supply and Demand Status: Limited
BIPOLAR TRANSISTOR, NPN, 40V; TRANSISTOR POLARITY:NPN; COLLECTOR EMITTER VOLTAGE V(BR)CEO:40V; POWER DISSIPATION PD:40W; DC COLLECTOR CURRENT:4A; DC C. FREE 2 YEAR RADWELL WARRANTY
Bipolar (BJT) Single Transistor, NPN, 40 V, 40 W, 4 A, 40 RoHS Compliant: Yes
TRANS NPN 40V 4A SOT32-3
| DigiKey | ERSAELECTRONICS PTE. LTD. | Win Source Electronics | Radwell International | Newark, An Avnet Company | Shenzhen Shengyu Electronics Technology Limited | |
|---|---|---|---|---|---|---|
| Product Category | Transistors | Bipolar RF Transistors | Transistors | RF Transistors | Bipolar RF Transistors | Bipolar RF Transistors |
| Product Number | 497-2583-5-ND | 276-MJE521 | 137681-MJE521 | 16477301 | 34X0712 | MJE521 |
| Product Name | Single Bipolar Transistors | 4A 40V Bipolar Transistor | TRANSISTORS - Transistors (BJT) - Single - MJE521 | Transistor | Bipolar (Bjt) Single Transistor, Npn, 40 V, 40 W, 4 A, 40 Rohs Compliant Stmicroelectronics | Discrete Semiconductor Products - Transistors - Bipolar (BJT) |
| Polarity | NPN | NPN | NPN; NPN | NPN | ||
| Package Type | TO-225AA, TO-126-3 | SOT3; SOT-32-3 | TO-3 | |||
| IC(max) | 4000 milliamps | 4000 milliamps | ||||
| VCEO | 40 volts | 40 volts |
