If you are looking for high current transistors in the range of 50 amps with a complementary pair, then you can try these Darlington transistors MJ11032 and MJ11033. The MJ11032 transistor is a Darlington NPN power transistor while the MJ11033 is its complementary PNP transistor which is also a Darlington power BJT.
Main features
The main features of the MJ11032 MJ11033 complementary Darlington pair transistors are as given below:
- High DC current gain of 1000 hFE minimum when the collector is operated at 25 amp DC
- DC current gain capacity may be reduced to 400 hFE, if the collector current rises to 50 amp DC
- The transistor is able to handle up to 100 amp if the current is in the pulsed manner
- Internal protection diode are provided to the transistors for protection against inductive transients.
- The monolithic design of the BJTs also include internal base/emitter shunt resistor to limit maximum base current.
- The 50 amp transistors are rated to handle junction temperatures as high 200 degrees Celsius
- Total power dissipation or power handling capacity without heatsink is 300 watts
Pinout Diagram
The pinout connections for the 50 amp MJ11032, MJ11033 complementary transistors can be seen in the following images:
Maximum Tolerable Rating
The maximum tolerable rating of transistors mainly refers to the maximum amount of voltage and current the devices can tolerate at 25 degrees Celsius ambient temperature. The following table shows the maximum tolerable voltage and current limits of the 50 amp transistors MJ11032, MJ11033.
Complete datasheet can be downloaded from the following link
Hey, I have a project that needs a couple pairs of tilt switches to limit actuators and I’ve been looking at some, mercury and ball and whatever is listed. My problem is most are rated for small currents and I want to be able to handle up to 10 amps so I’ve been trying to figure how to construct a transistor amplifier these tilt switches can turn on and off. Been confusing me as to how this can be down. You have any suggestions?
Hello Bret,
You can check out the following article. The first diagram shows how to use a tilt switch with a transistor to operate the higher current load. The transistor rating can be upgraded as per the load requirement. Let me know if you have any further doubts.
Hi, I was just looking at this component and also looking at the shcematic you post on the 24v to 12v converter using the LM78S40 and considering using a collection of these as the high power switches. My big question is how much current it would take to trigger say 5 of these in parallel from the IC to the base of all the Q’s, since BJT’s are current driven instead of voltage as would be by using MOSFET’s. Am I going to need to add in a current amp and load sharing R’s to get all the Q’s to firing evenly. I need a Vreg that will give me around 50 to 70amps.
Hi, Although I do not know the output current specification of the LM78S40, whatever it is, should be sufficient for switching the above 50 amp transistors since these are are Darlington type with high current gain.
Note that Tc is case temperature, not ambient. So 300 W is good for perfect cooling, not without heat sink.