- #TESTING 2N3055 TRANSISTOR HOW TO#
- #TESTING 2N3055 TRANSISTOR PLUS#
- #TESTING 2N3055 TRANSISTOR SERIES#
Another test to see what version you have, look at Q3/Q4 (drivers). Reviewing the parts list of my ST-120 Q5/Q6 were 2N3055 Dynaco Part 571844. The NPN transistor was replaced with a PNP transistor, and the polarity of the Zener diode and 100uF capacitor were reversed. ST-120 has 2n3055 (Really) On many versions of the ST-120 that were kit built, the outputs were indeed 2n3055. 8 we have a Zener diode regulator for a negative polarity power supply. The next question becomes, just how much current can this circuit provide to a load? Let's look at the problem. If Rs is too large then we lack the minimum current Iz to maintain voltage regulation.
The device has good amplifying factor and also the gain is almost linear making 2N3055. 2N3055 is also used in audio power amplifiers. 2N3055 is one of the basic transistors available in the market for cheap and with features being suited for many applications. If Rs is too small excessive current will overheat Z1. 2N3055 is preferred when you want a simple switching device for medium power loads.
#TESTING 2N3055 TRANSISTOR PLUS#
If Vin increases to say 18 volts, then the Zener current Iz increases maintaining the voltage across RL.Īt all times the voltage drop across Z1 plus Rs always equals the supply voltage Vin, while the voltage across RL thus IL is constant.
#TESTING 2N3055 TRANSISTOR HOW TO#
It will be awhile before I will have all of the components to build the target project so I would like to know how to test the 2N3055 transistors. If Vin drops to 14 volts the zener current Iz drops to maintain the voltage on RL. Hello, I purchased some 2N3055 transistors through eBay today and they were manufactured in India by Continental Device India Limited. Z1 at 10.2 volts maintains a steady voltage across RL as the Vin varies over a particular range. Our total current (Is) flows through Rs and divides through Z1 (24mA) and RL (51mA).
#TESTING 2N3055 TRANSISTOR SERIES#
Z1 and Rs are in series while a 200 Ohm load resistor RL is parallel to Z1. Fig.1 illustrates a basic Zener diode connection. Zener diodes are always used in there reverse bias mode designed to breakdown at a particular voltage. Related - Experiments with TL431A Shunt Regulator a type of variable Zener diode.Ī Zener diode is a two terminal solid state device that when forward biased will conduct and act like any other silicon diode. 1 heat sink per 2N3055 in an x pattern under a 125mm 0.5A fan blowing from outside the case down the heat sink fins with a 30mm gap at the bottom. I thought 3A from the transformer a safe limit. The power supply table is designed for stereo. I was considering using 4 x 2N3055s each at about 0.75A at 52V (39W each). Besides the heat sinks presented the 3nos 2N3055 transistors needs to be cooled down by clamping them on the metal cabinet using mica insulating washers. The following is for information purposes only and comes with no warranty. Passive testing of an electronic circuit appears pretty straightforward job. I test Vcb (positive lead to base, negative lead to collector) and get a reading of 1.3 VDC. My test using DMM in diode mode: I test Vbe (positive lead to base, negative lead to emitter) and get a reading of.
They will be used in conjunction with common bi-polar transistors to boost the output current and can used for real-world voltage regulators by students and hobbyists. I am testing different transistors with my DMM in Diode mode with good results until I came to the BC517 NPN Darlington silicon transistor. This will explore the basic operation of Zener diodes and their use as voltage regulators. Inchange Semiconductor Product Specification Silicon NPN Power Transistors 2N6055 2N6056 DESCRIPTION With TO-3 package Low collector saturation voltage DARLINGTON Complement to type 2N6053 2N6054 APPLICATIONS General-purpose power amplifier and low frequency swithing applications PINNING PIN DESCRIPTION1 Base 2 Emitter Fig.Updated, revised October 2016.
designed for genĢN6053 PNP2N6055 NPNCOMPLEMENTARY POWER DARLINGTONThe 2N6053 is a silicon epitaxial base PNP transistor in monolithic Darlington configuration and are mounted in Jedec TO-3 metal case.They are intended for use in power linear and switching applications.The complementary NPN type is the 2N6055ABSOLUTE MAXIMUM RATINGSSymbol Ratings Value Unit2N6053VCEO #Collector-Emitter VoltaĠ.3. Order this documentMOTOROLAby 2N6055/DSEMICONDUCTOR TECHNICAL DATANPN2N6055Darlington Complementary2N6056*Silicon Power Transistors*Motorola Preferred Device.