- Sierra IC Inc. will be closed for the holiday season from December 20, 2025 through January 4, 2026, and will resume normal business operations on January 5, 2026.

» Home » buy_online » datasheet » Products UnCategorized » Misc-Switch » BF4

Datasheet

Sierra IC©'s Datasheet Search Tool makes it easy to find electronic components and semiconductors, integrated circuits, diodes, triacs, connectors, and passive and active components. Obsolete to current datasheets are available for free download. The information presented in Sierra IC©'s Datasheet Search Tool is based on the manufacturers' published information at the time the information was collected.

PDF

Part Number	Manufacturer	Page 1 of 1
BAF-4 BF-4	Cooper/Bussmann
BF4142-20B BF4142-20B	JKL Components Corp.
BF4183-20B N/A	JKL Components Corp.
BF420 NPN Silicon Transistor with high Reve...	NXP Semiconductors
BF420/D High Voltage Transistors NPN Silicon	ON Semiconductor
BF420-AP	STMicroelectronics
BF420 T/R TRANS NPN 300V 50MA SOT54	NXP Semiconductors
BF420ZL1	ON Semiconductor
BF420ZL1G TRANS NPN GP SS 300V 50MA TO-92	ON Semiconductor
BF421 PNP Silicon Transistor with high Reve...	NXP Semiconductors
BF421/D High Voltage Transistors PNP Silicon	ON Semiconductor
BF421-AP	STMicroelectronics
BF421ZL1 High Voltage Transistor PNP	ON Semiconductor
BF421ZL1G TRANS PNP GP SS 300V 50MA TO-92	ON Semiconductor
BF422 NPN Silicon Transistor with high Reve...	ON Semiconductor
15 Results Page 1 of 1

Technical Resources / Inventory Search

Visa Mastercard American Express Open Links

Mobile Version Online Ordering Order Status Products Line Card Site Map Help Center About Sierra Ic Request Quote Blog.sierraic.com

Amplifiers Circuit Protection Communication Data Conversion Filter Inductors Interconnect Passive Components Power Supplies Products UnCategorized Semiconductors and Actives

Copyright © 2003-2025, Sierra IC. All Rights Reserved.

16151 Lancaster Hwy, Charlotte, NC 28277 USA | Phone: 1-866-296-0911 or 704-256-0088 | Fax: 631-207-8305

webmaster@sierraic.com

As an Independent Distributor, Sierra IC Inc. is not affiliated with the manufacturers of the products it sells except as expressly noted otherwise.
Any and all trademark rights associated with the manufacturers' names and products are owned by the respective manufacturers.
As an Independent Distributor No manufacturers warranty is offered except as expressly noted otherwise. Sierra IC is NOT an authorized distributor/dealer or sales representative of ANY manufacturer.
Disclaimer: Though Sierra IC Inc. takes reasonable efforts to maintain material provided by this website, Sierra IC Inc., its employees, content providers or any other party who has contributed makes no claims/warranties that the information herein is in every aspect accurate or complete, and thus are not responsible for any errors or omissions or for the results obtained from the use of such information. This is a comprehensive limitation of liability that applies to all damages of any kind, including (without limitation) compensatory, direct, indirect or consequential damages, financial loss, loss of data, income or profit or claims of third parties.

SIERRA IC INC GIVES A 30 DAY LIMITED WARRANTY ON ALL THE ITEMS (PRODUCTS) IT SELLS , SPECIFICALLY THAT SHOULD ANY PRODUCT SOLD BY SIERRA IC INC FAIL TO MEET THE PERFORMANCE LEVEL SPECIFICATIONS OF THAT PRODUCT UNDER IT�S CORRESPONDING MIL-SPEC OR COMMERCIAL STANDARDS, SIERRA IC WILL ISSUE AN RMA FOR REFUND OR REPLACEMENT OF THE PRODUCT, AND THIS SHALL BE THE SOLE RECOURSE OF THE CUSTOMER TO RESOLVE ANY CLAIMS. THE CUSTOMER/BUYER ACKNOWLEDGES THAT THESE ITEMS OFFERED FOR SALE BY SIERRA IC INC , ARE NOT REPRESENTED AS HAVING ALL ORIGINAL MANUFACTURER CERTIFICATIONS. SPECIFICALLY, IT IS KNOWN THAT �TRACEABILITY� ALL THE WAY BACK TO THE ORIGINAL COMPONENT MANUFACTURER IS NOT AVAILABLE. THE CUSTOMER ACKNOWLEDGES THE PRODUCT MAY NOT BE IN ORIGINAL PACKAGING AND BECAUSE OF LACK OF TRACEABILITY IT IS NOT POSSIBLE FOR SIERRA IC INC THAT THE PRODUCT IS ORIGINAL IN ALL OF ITS SPECIFICATIONS. CUSTOMER AGREES TO PERFORM ALL TESTS TO ASSURE THE PRODUCTS USABILITY. THE ITEMS SHOULD ALSO NOT BE USED IN ANY LIFE SUPPORT OR MISSION CRITICAL APPLICATION WITHOUT RE-CERTIFICATION AND TESTING TO MILITARY/HIGH RELIABILITY SPECS. IN NO CASE SHALL SIERRA IC BE RESPONSIBLE FOR ANY DAMAGES WHATSOEVER, INCLUDING BUT NOT LIMITED TO DIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, OR ANY OTHER CLAIM RESULTING FROM THE USE OF SAID PRODUCT. THE CUSTOMER ASSUMES ALL RESPONSIBILITY AND LIABILITY OF SAID PRODUCT.