KSC2690/2690A Transistors Pinout, Equivalents, Features, Applications and More

In this post, we are going to discuss about two transistors of same series which are KSC2690 and KSC2690A. Both transistors are almost same and can be used interchangeably in all situations but there are few conditions in which we cannot use them alternatively which we will discuss further in this post. Moreover, we will also discuss KSC2690/2690A transistors pinout, equivalents, features, applications and other useful info about this transistor.

Features / Technical Specifications:

• Package Type: TO-126
• Transistor Type: NPN
• Max Collector Current(IC): 1.2A
• KSC2690 Max Collector-Emitter Voltage (VCE): 120V
• KSC2690A Max Collector- Emitter Voltage (VCB): 160V
• KSC2690 Max Collector-Base Voltage (VCE): 120V
• KSC2690A Max Collector-Base Voltage (VCB): 160V
• Max Emitter-Base Voltage (VBE): 5V
• Max Collector Dissipation (Pc): 20W
• Max Transition Frequency (fT): 155 MHz
• Minimum & Maximum DC Current Gain (hFE): 35 to 320
• Max Storage, Operating & Junction temperature range: -55 to +150 Centigrade

PNP Complimentary:

PNP complimentary of KSC2690/2690A is KSA1220/1220A

Replacement and Equivalent:

MJE340, 2N6557, 2N6558, 2N6559, 2SC1519, 2SC1520, 2SC1521, 2SC1565, 2SC1749, 2SC2068, 2SD668, 2SD668A, BD127, BD128, BD158, BD159, BD232, D40N1, D40N2, D40N3, D40N4, D40N5, MJE340K, MJE344K, NSD131, NSD132, NSD133, NSD134, NSD135.

KSC2690/2690A Transistors Explained / Description:

KSC2690 and KSC2690A both are the same series transistors available in TO-126 package. Both are general purpose transistors having good specs. As mentioned above both the transistors are of same series with almost identical specs due to which they can be used interchangeably in most conditions, but there are minor differences between them due to which we cannot use them interchangeably in all conditions such as the maximum collector to emitter voltage of KSC2690 is 120V and KSC2960A is 160V so the conditions in which the KSC2960A is driving load of more than 100V we cannot use KSC2690 as a replacement because the collector to emitter voltage of KSC2690A is higher than KSC2690. But in opposite conditions, we can use KSC2690A in the place of KSC2690 in almost any condition because KSC2690A collector to emitter voltage is higher than KSC2690. Looking at the other specs of the transistor the maximum pulsed collector current is 2.5A, max base current is 0.3A, DC current gain is 35 to 320, transition frequency is 155MHz and the max collector dissipation is 20 Watt.

Both the transistors are manufactured in three different DC current gain or hFE values that can be determined by looking at the last alphabet after its part number. So if that alphabet is “O” then its DC current gain will be 60 to 120, if that alphabet is “Y” the its hFE will be 100 to 120, and if that alphabet is “Y” then the hFE value will be 160 to 320.

Where We Can Use it & How to Use:

KSC2690 and KSC2690A transistors can be used wide variety of general purpose switching and amplification purpose. As a switch it can drive load of upto 1A and with 1A current you can drive many load such as LEDs, relays, ICs, high power transistors. part of a circuit etc. although the max collector current of the transistor is 1.2A but we cannot use any transistor to its absolute maximum ratings. Using any transistor to its absolute maximum rating may damage it or weakens its performance. So as a rule of thumb we use atleast 20% below from its absolute maximum ratings. Moreover the transistor can also be used in amplifiers.

Applications:

Audio amplifiers

Motor Drivers

Radio and RF Applications under 155MHz

General purpose applications that fall under its ratings

Safe Operating Guidelines / Absolute Maximum Ratings:

Following are the safety guidelines to operate the transistor effectively.

• The max collector to emitter voltage of KSC2690 is 120V therefore do not drive load of more than 96V.
• The max collector to emitter voltage of KSC2690A is 160V therefore do not drive load of more than 128V.
• The max collector current is 1.2A therefore do not drive load of more than 0.96A.
• Always store or operate the transistor at temperatures above -55°C and below +150 °C.

Datasheet:

To Download the datasheet just copy and paste the below link in your browser.

https://z3d9b7u8.stackpathcdn.com/pdf-down/K/S/C/KSC2690_FairchildSemiconductor.pdf