NJ Semi-Conductors reserves the right to change test conditions, parameters limits and package dimensions without notice information ftirnished by NJ. BRX49 datasheet, BRX49 pdf, BRX49 data sheet, datasheet, data sheet, pdf, Boca Semiconductor Corporation, SCRs (Silicon Controlled Rectifiers). Motorola, Inc. BRX44 thru. BRX BRX CASE (TOAA). STYLE 3. WITH TO LEADFORM*. SCRs. AMPERE RMS. 30 TO VOLTS.

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It would be kind of you if you can help to rbx49 a charger to charge AH lead-acid battery via solar cell and alternatively main power line. We are connected 3v red LED. Hi, can you use a higher amp transformer for say a 12AH battery without changing other components?

R7 and R8 also have the same situation with R4 and R5 as they are connected in parallel.

My battery was not dead she have 12,7V. Excuse my bad english!! However if you would like to ask a question it is suggested that you use the forum instead. I am interested in using the circuit for charging my 12V battery. I have’t checked if there’s something else broken yet, just wanted to get this clear to me. Do keep this in mind. The owner of this site generally does not answer questions in comments.


I dont understand the early circuit topology enough to attempt to modify the design. Please stop posting comments hoping someone will write you back. OK, I understand – continue.

Please help me out.

You mentioned in the notes that the transformer could be changed to 18V output for charging larger batteries. Is this circuit workable for batteries from 50 to AHr? Well modern substitutes have a reverse pinout as well.

BRX49 Datasheet pdf – SCRs (Silicon Controlled Rectifiers) – Boca Semiconductor Corporation

What is the minimum charging voltage for a 12V SLA battery? Can I use circuit for three phase delta connections: In collaboration with Intertek, Distrelec is offering a calibration service for brx9 electronic test and measurement instruments. See this forum topic. Please enter your name and your e-mail address.

Fabian Enterprises Ltd MALTA

In this case, no fan is needed. The circuit is good or what?? Chris Van Der Westhuizen.

Altered the schematic from Larry Pina’s book to the international version of the analog board. If only it was so simple Gate Trigger Voltage Vgt.

May the Force be with you Ferrix! Posted February 12 edited.

New Jersey Semiconductor

The highest voltage the circuit can achive is More about lead time. I have a 24 volt charger no longer used to charge power wheelchair batteries. Seems like it should be reasonably straightforward. Currently I’m looking for at charger to small motocycles, as it is over charging the battery.


For starters, I substituted the 4×2 watt resistors,for 5watt ceramic type, added adjustable fan cooling using separate power supply. If you would like to leave a comment, you can do so using the form below. Please suggest the componenent value changes.

Posted February 25, Thank you for your message. If better to add meter and display to indicated the charge voltage and current Do you have any suggestion? In this circuit you suggested 12V ac Transformer, not to mention that the diodes will lower the output voltage also lead acid battery isn’t at 12V even when discharged, its around somewhat After calibration is performed, you will receive an ISO certificate from Intertek, which is valid for 12 months.

Thanks in advance Ramesh.