Part Number: BT145-800R

Manufacturer: WeEn Semiconductors

Description: SCR 800V 25A TO220AB

Shipped from: Shenzhen/HK Warehouse

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Technical Specifications of BT145-800R,127

Datasheet  BT145-800R,127 datasheet
Category Discrete Semiconductor Products
Family Thyristors – SCRs
Manufacturer NXP Semiconductors
Packaging Tube
Voltage – Off State 800V
Voltage – Gate Trigger (Vgt) (Max) 1V
Current – Gate Trigger (Igt) (Max) 35mA
Voltage – On State (Vtm) (Max) 1.5V
Current – On State (It (AV)) (Max) 16A
Current – On State (It (RMS)) (Max) 25A
Current – Hold (Ih) (Max) 60mA
Current – Off State (Max) 1mA
Current – Non Rep. Surge 50, 60Hz (Itsm) 300A, 330A
SCR Type Standard Recovery
Operating Temperature -40°C ~ 125°C
Mounting Type Through Hole
Package / Case TO-220-3
Supplier Device Package TO-220AB

BT145-800R,127 Introduction

The BT145-800R (SCR 800 V 25 A Standard Recovery Through Hole TO-220AB) is a silicon-controlled rectifier that works well and is reliable. It is used in a variety of industrial settings. It is made to control high voltage and current levels, making it an important part of many electronic systems. In this full guide, we’ll talk about the BT145-800R in detail, including its features, specifications, applications, installation, usage, maintenance, and troubleshooting. By the end of this guide, readers will know everything there is to know about BT145-800R and how to get the most out of it. Whether you have used silicon-controlled rectifiers before, this guide will help you get the most out of this powerful one.


The BT145-800R (SCR 800 V 25 A Standard Recovery Through Hole TO-220AB) can be used in various industrial and commercial settings where high voltage and current control are needed. Here are some examples of how it can be used:

● Motor Control:

The BT145-800R can control the speed and direction of AC and DC motors in industrial and household appliances. For example, it can be used to control the speed of the motors in washing machines, air conditioners, and refrigerators so that they work well and reliably.

● Lighting Control:

The BT145-800R can be used to dim, switch, and control the phase of lights. For example, it can be used to control the brightness and timing of lights in streetlights, stadium lights, and industrial lighting systems so that they use less energy and cost less to run.

● Power Supplies:

The BT145-800R can be used for power supply tasks like rectifying and regulating voltage. For example, it can control the voltage and current in UPS systems, welding machines, and battery chargers to ensure they work in a stable and reliable way.

● Heating Control:

The BT145-800R can be used for heating tasks like controlling the temperature and the amount of power. For example, it can control the temperature and power of industrial ovens, heaters, and boilers so that they can work well and safely.

● Automotive Applications:

The BT145-800R can be used in cars to control motors, lights, and power. For example, it can control the speed, brightness, and amount of power used in electric vehicles, hybrid vehicles, and car lighting systems to make them run more efficiently and reliably.

The BT145-800R is a silicon-controlled rectifier that can be used in many situations where high voltage and current control are needed. Its high performance, reliability, and unique features make it a great choice for many industries, including automotive, industrial, and home appliances.

Installation and Setup

Here are the steps to install and set up the BT145-800R (SCR 800 V 25 A Standard Recovery Through Hole TO-220AB):

Material Needed:

BT145-800R (SCR 800 V 25 A Standard Recovery Through Hole TO-220AB) (SCR 800 V 25 A Standard Recovery Through Hole TO-220AB).

  • Soldering Iron.
  • Solder Wire.
  • Heat Sink.
  • Thermal Compounds.


Prepare the work area. Ensure the work area is clean, dry, and free of any static charges that could damage the device.

Prepare the heat sink. If you plan to use a heat sink, put a small amount of thermal compound on the bottom of the heat sink.

Put the BT145-800R in place:

Put the BT145-800R on the PCB or where it will be mounted. Ensure the device faces the right way, with the anode lead facing the positive voltage and the cathode lead facing the negative voltage.

Solder the wires:

Solder the wires of the BT145-800R to the PCB or the place where it will be mounted. Put the soldering iron on both the leads and the PCB/mounting spot simultaneously. Do not use too much heat or solder because it could hurt the device.

Attach the heat sink. If you want to use a heat sink, you can screw or clip it to the BT145-800R. Ensure the heat sink is attached well and the thermal compound is spread out evenly.

Test the device. Before you connect a load to the device, you should test it to ensure it works properly. Measure the device’s resistance with a multimeter and ensure it matches its specifications.

Connect the load:

Connect the load to the device, ensuring that the voltage and current ratings of the load are within the device’s specifications.

By following these steps, you can quickly install and configure BT145-800R (SCR 800 V 25 A Standard Recovery Through Hole TO-220AB) in your electronic system.

Maintenance and Care

Follow these maintenance and care guidelines to keep the BT145-800R (SCR 800 V 25 A Standard Recovery Through Hole TO-220AB) operating effectively and safely:

● Keep it tidy:

Maintaining the equipment clean is crucial because dirt, dust, and other impurities might impair its effectiveness. Use a soft-bristled brush or a can of compressed air for any debris that may have gathered on the device.

● Prevent moisture:

Moisture might harm the equipment and make it inoperable. Avoid exposing the gadget to water or other liquids, and keep it in a dry place.

● Storage technique:

To avoid electrostatic discharge, place the gadget in an antistatic bag or container when not in use (ESD). ESD damage may cause the gadget to malfunction or fail.

Use caution when handling the device because it is sensitive to vibration and shock. Keep the device from being dropped or experiencing any other mechanical shocks.

routine testing To ensure it is operating according to expectations, test the gadget with a multimeter regularly.

Employ a heat sink to help heat dissipation while the device runs. High temperatures can damage the gadget. Thus, it’s crucial to employ a heat sink or thermal compound to keep it cool.

You may assist in ensuring that the BT145-800R (SCR 800 V 25 A Standard Recovery Through Hole TO-220AB) runs effectively and safely by adhering to these maintenance and care recommendations.


In conclusion, the BT145-800R is a strong and dependable SCR that may be applied in various industrial electronics applications. It is a great option for design engineers looking for a dependable and effective solution for their electronic systems due to its strong surge capability, low on-state voltage drops, and quick switching speed.

Correct installation, maintenance, and care instructions will ensure maximum performance and lifespan. The gadget should be kept clean, moisture should be avoided, a heat sink should be used, and regular testing should be done.

Consider contacting ICRFQ, China’s leading distributor of electronic parts, if you’re interested in buying the BT145-800R or any other electronic component. They provide premium products at affordable pricing, making them a fantastic option for your technological needs. Please get in touch with them right away to learn more.

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