Name: MJE521
Brand: STMicroelectronics
SKU: MJE521_235
Availability: InStock
Rating: 5 (154 reviews)

MJE521

For Reference Only

Part Number	MJE521
Manufacturer	STMicroelectronics
Description	TRANS NPN 40V 4A SOT-32
Datasheet	MJE521 Datasheet MJE521 Specifications
Package	TO-225AA, TO-126-3
ECAD
In Stock	28,560 piece(s)
Unit Price	Request a Quote
Lead Time	Can Ship Immediately
Estimated Delivery Time	Apr 18 - Apr 23 (Choose Expedited Shipping)
Request for Quotation

Payment Methods
Delivery Services

Part Number # MJE521 (Transistors - Bipolar (BJT) - Single) is manufactured by STMicroelectronics and distributed by Heisener. Being one of the leading electronics distributors, we carry many kinds of electronic components from some of the world’s top class manufacturers. Their quality is guaranteed by its stringent quality control to meet all required standards.

For MJE521 specifications/configurations, quotation, lead time, payment terms of further enquiries please have no hesitation to contact us. To process your RFQ, please add MJE521 with quantity into BOM. Heisener.com does NOT require any registration to request a quote of MJE521.

MJE521 Specifications

Manufacturer	STMicroelectronics
Category	Discrete Semiconductor Products - Transistors - Bipolar (BJT) - Single
Package	TO-225AA, TO-126-3
ECAD
Series	-
Transistor Type	NPN
Current - Collector (Ic) (Max)	4A
Voltage - Collector Emitter Breakdown (Max)	40V
Vce Saturation (Max) @ Ib, Ic	-
Current - Collector Cutoff (Max)	100µA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce	40 @ 1A, 1V
Power - Max	40W
Frequency - Transition	-
Operating Temperature	150°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-225AA, TO-126-3
Supplier Device Package	SOT-32-3

MJE521 Datasheet

MJE521 Reviews

Phoe*****elch

April 8, 2023

★ ★ ★ ★ ★

Excellent company. Product as described. Usually fast and well packed.Very nice.

Rive*****ndoza

April 6, 2023

★ ★ ★ ★ ★

★★★★★ Nice Item, Shipped Fast And As Promised! ★★★★★ THANKS!!!!! ★★★★★

Kal*****Greer

March 22, 2023

★ ★ ★ ★ ★

The order process is easy and user friendly, very helpful customer service, always fast shipping.

Kod*****ent

February 24, 2023

★ ★ ★ ★ ★

Quality made product satisfied with my purchase. Thanks.

Devin*****antes

February 23, 2023

★ ★ ★ ★ ★

All OK, fast delivery, good quality. Product works as it should, Nice Seller.

Bran*****Chan

February 21, 2023

★ ★ ★ ★ ★

All items individually packed in anti static bags and properly labeled.

Xavi*****obal

February 19, 2023

★ ★ ★ ★ ★

Worked like it was intended.

Write a Review

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MJE521 Packaging

MJE521 FAQ

1. How to order MJE521 on Heisener?

Currently, Heisener only provide peer-to-peer order processing. While you submit the RFQ, our professional agent will contact you with the competitive prices in the global market, and our agent will prompt you to finish the order if you accept our offers.
2. How does Heisener guarantee that MJE521 is from the original manufacturer or authorized agents?

We have a professional and experienced quality control team to strictly verify and test the MJE521. All suppliers must pass our qualification reviews before they can publish their products including MJE521 on Heisener; we pay more attention to the channels and quality of MJE521 products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
3. Are the MJE521 price and inventory displayed accurate?

The price and inventory of MJE521 fluctuates frequently and cannot be updated in time, it will be updated periodically within 24 hours. And, our quotation usually expires after 5 days.
4. What forms of payment are accepted?

Wire Transfer, PayPal, Alipay, Wechat, Credit Card, Western Union, MoneyGram, and Escrow are all acceptable.

Warm Tips: Some orders in certain payment forms may require handling fee.
5. How is the shipping arranged?

Customers can choose industry-leading freight companies, including DHL, UPS, FedEx, TNT, and Registered Mail. Shipping insurance is also available.

Once your order has been processed for shipment, our salesperson will send you an email advising you of the shipping status and tracking number.

Warm Tips: It may take up to 24 hours for the carriers to display tracking information. Usually, express delivery takes 3-5 days, and registered mail takes 25-60 days.
6. What is the process for return or replacement of MJE521?

All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the MJE521 we delivered, we will accept the replacement or return of the MJE521 only when all of the below conditions are fulfilled:

(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

(2)We are informed of the defect described above within 90 days after the delivery of MJE521.

(3)The PartNo is unused and only in the original unpacked packaging.

Two processes to return the products:

(1)Inform us within 90 days

(2)Obtain Requesting Return Authorizations
7.How to contact us to get technical supports, such as MJE521 pin diagram, MJE521 datasheet?

If you need any after-sales service, please do not hesitate to contact us.

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MJE521 Guarantees

Service Guarantees

We guarantee 100% customer satisfaction.

Our experienced sales team and tech support team back our services to satisfy all our customers.

Quality Guarantees

We provide 90 days warranty.

If the items you received were not in perfect quality, we would be responsible for your refund or replacement, but the items must be returned in their original condition.

Global Supply Chains - Reliable and Authorized Distributor Resources

Part Number

Manufacturer

Description

Stock

MJE521 PBFREE

D# V36:1790_22997313

Central Semiconductor Corp

Trans GP BJT NPN 40V 4A 40000mW 3-Pin(3+Tab) TO-126

Part Number	Manufacturer	Description	Stock
MJE521G D# MJE521G	ON Semiconductor	TRANS GP BJT NPN 40V 4A 3PIN TO-225 - Bulk (Alt: MJE521G)	0
MJE521 PBFREE D# MJE521 PBFREE	Central Semiconductor Corp	Transistor GP BJT NPN 40V 4A 3-Pin TO-126 Box - Boxed Product (Development Kits) (Alt: MJE521 PBFREE) RoHS: Compliant	0
MJE521 D# MJE521	Central Semiconductor Corp	Silicon Complementary Power Transistor 40V 8A 3-Pin TO-126 - Boxed Product (Development Kits) (Alt: MJE521)	0
MJE521 TIN/LEAD D# MJE521 TIN/LEAD	Central Semiconductor Corp	Transistor GP BJT NPN 40V 4A 3-Pin TO-126 Box - Boxed Product (Development Kits) (Alt: MJE521 TIN/LEAD) RoHS: Not Compliant	0

Part Number

Manufacturer

Description

Stock

MJE521

Motorola Semiconductor Products

Part Number

Manufacturer

Description

Stock

MJE521

Motorola Mobility LLC

Min Qty 7

180

MJE521G

ON Semiconductor

N/A 4 A, 40 V, NPN, Si, POWER TRANSISTOR, TO-225AA LEAD FREE, PLASTIC, CASE 77-09, TO-225, 3 PIN

16890

Part Number

Manufacturer

Description

Stock

MJE521G

D# 2156-MJE521G-ON-ND

Rochester Electronics LLC

TRANS NPN 40V 4A TO225AA

3597

MJE521

D# 497-2583-5-ND

STMicroelectronics

TRANS NPN 40V 4A SOT-32

Part Number

Manufacturer

Description

Stock

MJE521

NEW AND ORGINAL. ISRAEL W.HOUSE

625

Part Number	Manufacturer	Description	Stock
MJE521K	New Jersey Semiconductor Products Inc	OEM/CM QUOTES ONLY \| NO BROKERS	606
MJE521	New Jersey Semiconductor Products Inc	OEM/CM QUOTES ONLY \| NO BROKERS	7280
MJE5210	Motorola Semiconductor Products	OEM/CM QUOTES ONLY \| NO BROKERS	12
MJE521G	Rochester Electronics LLC	OEM/CM QUOTES ONLY \| NO BROKERS	4805

Part Number

Manufacturer

Description

Stock

MJE521G

ON Semiconductor

TRANS NPN 40V 4A TO225AA

RoHS: Compliant

3597

Part Number

Manufacturer

Description

Stock

MJE521G

ON Semiconductor

OEM/CM Immediate delivery

88168

MJE521

Motorola Semiconductor Products

OEM/CM Immediate delivery

Part Number

Manufacturer

Description

Stock

MJE521

D# 34X0712

STMicroelectronics

Bipolar (BJT) Single Transistor, NPN, 40 V, 40 W, 4 A, 40 RoHS Compliant: Yes

RoHS: Compliant

Min Qty: 1

Container: Bulk

Part Number	Manufacturer	Description	Stock
MJE521K D# NS-MJE521K	VARIOUS	OEM/CM ONLY	8492
MJE521-D D# NS-MJE521-D	ON Semiconductor	OEM/CM ONLY	1816
MJE521 D# NS-MJE521	ON Semiconductor	OEM/CM ONLY	6433
MJE521G D# NS-MJE521G	ON Semiconductor	OEM/CM ONLY	5910

Part Number

Manufacturer

Description

Stock

MJE521

National Semiconductor Corporation

Bipolar Junction Transistor, NPN Type, TO-127VAR

MJE521G

ON Semiconductor

4 A, 40 V, NPN, Si, POWER TRANSISTOR, TO-225AA

1273

Part Number

Manufacturer

Description

Stock

MJE521

D# MJE521

Motorola Semiconductor Products

Inventory R

Part Number

Manufacturer

Description

Stock

MJE521G

ON Semiconductor

Power Bipolar Transistor, 4A, 40V, NPN, TO-225AA, 3 Pin

RoHS: Compliant

3597

Part Number	Manufacturer	Description	Stock
MJE521G	ON Semiconductor	OEM/CM ONLY	634
MJE521K	New Jersey Semiconductor Products Inc	OEM/CM ONLY	538
MJE521	STMicroelectronics	OEM/CM ONLY	1012660

Part Number

Manufacturer

Description

Stock

MJE521G

ON Semiconductor

IN stock Immediate delivery

88153

MJE521

Motorola Semiconductor Products

IN stock Immediate delivery

Part Number

Manufacturer

Description

Stock

MJE521

Motorola Mobility LLC

shipping today

Part Number

Manufacturer

Description

Stock

MJE521

Motorola Semiconductor Products

RFQ

12309

Part Number

Manufacturer

Description

Stock

MJE521

D# 1467924

STMicroelectronics

TRANSISTOR, NPN,SOT-32

RoHS: Compliant

Min Qty: 1

Container: Each

Quick Inquiry

MJE521

Certified Quality

Heisener's commitment to quality has shaped our processes for sourcing, testing, shipping, and every step in between. This foundation underlies each component we sell.

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