BT151-500R BT151-500 BT151 Thyristor 500V 12A TRIAC BT151 SCR Thyristor TO-220 Package Silicon Control Rectifier Thyristor 3 Pin Leads 

Description: BT151 500V 12A TRIAC SCR Thyristor 

BT151-500R BT151-500 BT151 Thyristor 500V 12A TRIAC BT151 SCR Thyristor TO-220 Package Silicon Control Rectifier Thyristor 3 Pin Leads

The BT-151 is a medium power SCR used for power switching. SCRs are like transistors but have the ability to latch, i.e. stay on once triggered, even if the gate signal is removed. They stay in conduction till the anode-cathode current drops below a certain value called the holding current. SCRs in many ways behave like diodes with similar forward drops, hence the name ‘controlled rectifier

A Thyristor is a solid-state semiconductor device with four layers of alternating N and P-type material. They act as bistable switches, conducting when their gate receives a current trigger, and continue to conduct while they are forward biased. Thyristors are synonymous to Silicon-Controlled Rectifier (SCR).
Glass passivated thyristors in a plastic envelope, intended for use in applications requiring high bidirectional blocking voltage capability and high thermal cycling performance.

Typical applications include motor control, industrial and domestic lighting, heating and static switching.

Specification:

• Color: As shown
• Material: plastic, metal
• Voltage : 500V
• RMS on-state Current : 12A
• Mounting Hole Diameter : 4mm/ 0.16 inch
• Pin Size : 14 x 2.54mm/ 0.55 x 0.1 inch ( L* Pitch)
• Body Dimension : 29 x 10 x 4mm/ 1.1 x 0.4 x 0.16 inch (L*W*T)
• Weight : 19g

Pin configuration

1. Cathode: Conventional current flows out of the cathode.
2. Anode: Conventional current flows into the anode.
3. Gate: Controls conduction between the anode and cathode.
4. Tab: Electrically connected to the anode.

Features of BT151 SCR

• Maximum anode-cathode voltage (off state): 650V
• Maximum RMS current: 12A
• Pulsed DC current: 120A
• Gate trigger current: 15mA max.
• Holding current: 20mA max.
• Latching current: 40mA max.
• Available in the TO-220AB package.

BT151 Equivalent SCRs: 

BT152, TYN208, 2N6508

Other SCRs:

BTA16, BTB12600B, S6010

How to use the BT-151 SCR

The BT-151 can be used as a rectifier to provide pulsed DC current to various appliances. Shown here in the figure below is a simple dimming circuit that controls the brightness of a lamp.

The 10K variable resistor and the 1uF capacitor act like an RC time delay, controlling how much of one AC half cycle is seen by the load. This way, the SCR acts as an efficient power controller.

Applications

• Ignition circuits
• Protection circuits
• Motor control
• Static switching

Note:

Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.

Package Include:

• 1 x BT151-500R BT151-500 BT151 500V 12A TRIAC SCR Thyristor TO-220 Package Silicon Control Rectifier Thyristor