DIP 4 High Voltage Transistor

Features

High isolation 5000 VRMS

DC input with transistor output

Operating temperature range - 55 °C to110 °C

REACH compliance

Halogen free

MSL class 1

Regulatory Approvals

UL - UL1577

VDE - EN60747-5-5(VDE0884-5)

CQC - GB4943.1, GB8898

CUL- CSA Component AcceptanceService Notice No. 5A

Switch mode power supplies

Programmable controllers

Household appliances

Office equipment

In terms of performance, it can replace Everlight EL851, Liteon LTV-851, Ctmicro CT851, Sharp PC851, Toshiba TLP628. Renesas PS2513X-1/PS2513L-1, with a current conversion ratio of 50-600%. It is widely used in switch mode power supplies, smart meters, industrial control, measuring instruments, office equipment (copiers), and household appliances (air conditioning, fans, water heaters);TD851 is widely used in various electronic devices due to its excellent isolation performance and high-speed response characteristics, including but not limited to:
Industrial control: In automation control systems, it is used for signal isolation and transmission to improve system stability and safety.
Communication equipment: In communication systems, it can be used for signal isolation, reducing electromagnetic interference, and ensuring clear transmission of signals.
Medical equipment: In medical electronic devices, high isolation voltage helps protect patients and operators from the risk of electric shock.
Household appliances: In household appliances, they can be used as power management modules to achieve isolation and signal transmission between circuits
 

DIP4 High Voltage Transisto

Package Dimensions (Dimensions in mm unless otherwise stated)

Surface Mount Lead Forming & Surface Mount (Low Profile) Lead Forming 

1.Characteristics of 851 optocoupler?

It is a optoelectronic coupling device with high-speed response and high voltage resistance characteristics. It adopts advanced optoelectronic technology, which can operate stably at high frequencies and has high voltage resistance. The optocoupler P851 also has advantages such as small size and low power consumption, making it suitable for isolation and transmission applications in various electronic devices.

2.Working current of 851 optocoupler?

The working current of 851 is usually between a few milliamperes and a few tens of milliamperes. In practical applications, the selection of working current needs to be determined based on specific application scenarios. A larger working current can improve the photoelectric transmission ratio and response speed, but it can also increase power consumption and heat generation. When selecting the working current, it is necessary to comprehensively consider factors such as power consumption, heat generation, and response speed.

3.851 The structure of the photocoupling?

The structure of the 851 optocoupler consists of the light-emitting diode (LED) , which acts as the input part of the OPTOCOUPLER and emits light when a current passes through it. Photodiodes: the output part of a photocoupler that receives light from the light-emitting diode and converts it into electrical signals. Insulation Layer: located between the light-emitting diode and the phototransistor, it acts as electrical insulation to ensure the signal transmission between the two without external interference. Housing: encapsulates the entire optocoupler, protects the internal components and provides electrical connections to the interface.

4.Whether the sample for 815 photocoupling is free?

Yes, we can send the samples for free.

5.The meaning of the Darlington triode?

The Darlington transistor is a special type of transistor that consists of two transistors, usually of the NPN or PNP type, connected in series. Its main feature is that it has very high current magnification, so it has advantages in some applications.

6.How the Darlington triode works?

The input current IB1 flows into the base of the first triode, causing the first triode to turn on, thus generating current IC1 at the collector of the first triode. The collector current IC1 of the first triode flows as input current IB2 to the base of the second triode, enabling the second triode to conduct, thereby generating current IC2 at the collector of the second triode. Because the Darlington transistor consists of two transistors in series, its current magnification is the product of the magnification of each transistor, so the total magnification is very high, usually over 10,000. This gives Darlington transistors good performance in applications where driving current is weak. However, the Darlington transistor also has some disadvantages, such as high output voltage drop, vulnerable to interference and so on. In practical applications, Darlington transistors may or may not be used on demand.

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