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Yes. Contact our team for datasheets, package information, product specifications, alternative parts and sourcing support related to MJE521.

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Contact our sourcing team for current stock, batch information, lead time, technical documents, alternative parts and volume pricing.

Stock & Batch Verification Confirm available quantity, date code and delivery schedule.

Alternative Part Sourcing Request compatible or replacement parts when stock is limited.

Quality & Packaging Check Confirm product condition, packaging type and shipment protection before dispatch.

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: Supplier Verification
Supplier review and component quality inspection support.

: Technical Documents
Datasheet and specification confirmation for engineers.

: One-Stop BOM Sourcing
Multi-part procurement and shortage sourcing assistance.

STMicroelectronics RFQ AVAILABLE

MJE521

TRANS NPN 40V 4A SOT-32-3

Part Number: MJE521

Manufacturer: STMicroelectronics

Category: Single Bipolar Transistors

Package: TO-225AA, TO-126-3

Datasheet:: MJE521.pdf

Description: TRANS NPN 40V 4A SOT-32-3

Select Quantity Stock: 2,911

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TECHNICAL RESOURCES

MJE521 Technical Information

Specifications
FAQ
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Specifications

Product Attribute: Attribute Value

Part Number: MJE521

Manufacturer: STMicroelectronics

Package: TO-225AA, TO-126-3

Series: -

Package/Case: TO-225AA, TO-126-3

Packaging: Tube

Product Status: Obsolete

Transistor Type: NPN

Current - Collector (Ic) (Max): 4 A

Voltage - Collector Emitter Breakdown (Max): 40 V

Vce Saturation (Max) @ Ib, Ic: -

Current - Collector Cutoff (Max): 100µA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce: 40 @ 1A, 1V

Power - Max: 40 W

Frequency - Transition: -

Operating Temperature: 150°C (TJ)

Grade: -

Qualification: -

Mounting Type: Through Hole

Supplier Device Package: SOT-32-3

Frequently Asked Questions

1. How can I order MJE521 from Haishengye Electronics?

Submit an RFQ directly on this page with your required quantity, target price and delivery requirements. Our sales team will review the request and provide a quotation.

2. How does Haishengye Electronics verify the quality of MJE521?

We work with qualified suppliers and review sourcing channels, traceability, packaging and product condition before shipment.

3. Are the stock and price of MJE521 updated in real time?

Electronic component inventory and prices may change frequently. Displayed values are references, and final stock and pricing will be confirmed in the quotation.

4. Which payment methods are supported?

Wire Transfer, PayPal, Alipay, WeChat, Credit Card, Western Union, MoneyGram and Escrow may be supported depending on the order and destination.

5. How is international shipping arranged?

International shipping may be arranged through DHL, UPS, FedEx, TNT and other logistics channels. Tracking information will be provided after shipment.

6. What is the return or replacement process for MJE521?

Contact our sales team within the agreed period if there are quantity differences, incorrect items or clear external defects. Products should remain unused and in their original packaging.

7. Can I request technical support for MJE521?

Yes. Contact our team for datasheets, package details, product specifications, alternative parts and sourcing assistance.

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Packaging and Shipping Protection

Step 1 Product Inspection

Step 2 Casing & Dry Pipe

Step 3 Anti-static Bags

Step 4 Inner Carton

Step 5 Shipping Label

Step 6 International Delivery

Packaging may be adjusted according to product type, quantity, moisture sensitivity and destination requirements.

MJE521 Procurement and Technical Support

MJE521 is manufactured by STMicroelectronics. This page provides purchasing information including manufacturer, category, package, datasheet, stock reference, price reference and product specifications.

Haishengye Electronics supports customers sourcing MJE521 and related electronic components for prototype development, maintenance, NPI, production preparation and one-stop BOM procurement.

Submit an RFQ to request the latest stock, price, lead time, batch information, alternative parts, package confirmation or technical documents for MJE521.

Part Number: MJE521

Manufacturer: STMicroelectronics

Package: TO-225AA, TO-126-3

Category: Single Bipolar Transistors

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Shipping Method

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Shipped From

Shenzhen warehouse

Dispatch Time

Usually 1–3 business days after confirmation

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