Products > Discrete Semiconductors > Transistors > BF257
  • BF257
ST

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BF257

Hot Sale

RK Series - Econoline Unregulated DC-DC Converters; Input Voltage (Vdc): 24V; Output Voltage (Vdc): 15V; Power: 1W; Safety standards and approval: EN 60950 certified, rated for 250VAC; Optional Continuous Short Circuit Protected; 3kVDC & 4kVDC Isolat,Bipolar Transistors NPN High Voltage

  • Package/Case :
  • TO 5
  • Product Categories :
  • Bipolar Transistors
  • RoHs Status:
  • Rohs
  • In-stock:
  • 7000

Quantity  

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BF257 Product Details

Technical Parameters

  • Transistor Polarity
  • NPN
  • Collector Base Voltage VCBO
  • 160 V
  • Collector Emitter Voltage VCEO Max
  • 160 V
  • Emitter Base Voltage VEBO
  • 5 V
  • Maximum DC Collector Current
  • 0.1 A
  • Gain Bandwidth Product fT
  • 90 MHz
  • DC Collector/Base Gain hfe Min
  • 25
  • Maximum Operating Temperature
  • + 150 C
  • Mounting Style
  • Through Hole
  • Package / Case
  • TO 5
  • Maximum Power Dissipation
  • 5000 mW
  • Packaging
  • Bulk
  • Factory Pack Quantity
  • 500

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Estimated Delivery Time: May 23 - May 28 days (choose Expedited at checkout).

Shipping & Payment

Shipping

  • Shipping Type
  • Ship Fee
  • Lead Time
  • $20.00-$40.00 (0.50 KG)
  • 2-5 days
  • $20.00-$40.00 (0.50 KG)
  • 3-7 days
  • $20.00-$45.00 (0.50 KG)
  • 2-5 days
  • $25.00-$65.00 (0.50 KG)
  • 2-5 days
  • $25.00-$45.00 (0.50 KG)
  • 5-14 days
  • $2.00-$3.00 (0.10 KG)
  • 7-30 days

Processing Time:Shipping fee depend on different zone and country.


Payment

  • Terms of payment
  • Hand Fee
  • Payment Site
  • charge US$30.00 banking fee.
  • charge 4.0% service fee.
  • https://www.paypal.com/
  • charge 3.5% service fee.
  • charge US$0.00 banking fee.
  • https://www.westernunion.com/
  • charge US$0.00 banking fee.
  • http://global.moneygram.com/

We provide high quality products, thoughtful service and after sale guarantee

  • We have rich products, can meet your various needs.

    We have rich products, can meet your various needs.

  • Minimum order quantity starts from 1pcs.

    Minimum order quantity starts from 1pcs.

  • Lowest international shipping fee starts from US$2.00.

    Lowest international shipping fee starts from US$2.00.

  • 90 days quality guarantee for all products.

    90 days quality guarantee for all products.

Packing

  • Step1:Product

    Step1: Products

  • Step2:Vacuum packaging

    Step2: Vacuum Packaging

  • Step3:Anti-static bag

    Step3: Anti-Static Bag

  • Step4:Individual packaging

    Step4: Individual Packaging

  • Step5:Packaging boxes

    Step5: Packaging Boxes

  • Step6:bar-code shipping tag

    Step6: Bar-Code Shipping Tag

All the products will packing in anti-staticbag. Ship with ESD antistatic protection.

Outside ESD packing’s lable will use ourcompany’s information: Part Mumber, Brand and Quantity.

We will inspect all the goods before shipment,ensure all the products at good condition and ensure the parts are new originalmatch datasheet.

After all the goods are ensure no problems afterpacking, we will packing safely and send by global express. It exhibitsexcellent puncture and tear resistance along with good seal integrity.

Jotrin ESD packing

Guarantees

1.We provide 90 days warranty.

2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.

FAQ:

Q: How does Jotrin guarantee that BF257 is the original manufacturer or agent of ST?
We have a professional business development department to strictly test and verify the qualifications of ST original manufacturers and agents. All ST suppliers must pass the qualification review before they can publish their BF257 devices; we pay more attention to the channels and quality of BF257 products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of BF257 chips? Including ST original factory information, Bipolar Transistors application, BF257 pictures?
You can use Jotrin's intelligent search engine, or filter by Bipolar Transistors category, or find it through STMicroelectronics, Inc Information page.
Q: Are the ST's BF257 price and stock displayed on the platform accurate?
The ST's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for BF257, it is recommended to confirm the order with Jotrin salesperson or online customer service before payment.
Q: Can I place an order offline?
Yes. We accept offline orders.
We can provide order placement service. You only need to log in, click "My Orders" to enter the transaction management, and you will see the "Order Details" interface. After checking it, select all and click "Place Order". In addition, you can enjoy coupons or other selected gifts when placing orders online.
Q: What forms of payment can I use in Jotrin?
TT Bank, Paypal, Credit Card, Western Union, and Escrow is all acceptable.
Q: How is the shipping arranged and track my package?
Customers can choose industry-leading freight companies, including DHL, FedEx, UPS, TNT, and Registered Mail.
Once your order has been processed for shipment, our sales will send you an e-mail advising you of the shipping status and tracking number.
Note: It may take up to 24 hours before carriers will display tracking information. In normal conditions, Express delivery needs 3-5 days, Registered Mail needs 25-60 days.
Q: What is the process for returns or replacement of BF257?
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 BF257 we delivered, we will accept the replacement or return of the BF257 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 BF257.
(3)The BF257 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
More details about return electronic components please see our Return & Change Policy.
Q: How to contact us and get support, such as BF257 datasheet pdf, BF257 pin diagram?
Need any After-Sales service, please feel free contact us: sales@jotrin.com

STMicroelectronics, Inc

ST
ST Microelectronics is a global independent semiconductor company and a leader in developing and delivering semiconductor solutions across the spectrum of microelectronics applications, and that designs, develops, manufactures and markets a broad spectrum of products....
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