BT149D Thyristor 400V 0.5A TO-220
Prices updated: 13 Oct 2026
Compare prices
| Store | product | Price | View in store |
|---|---|---|---|
 Makers Electronics | BT149D Thyristor 400V 0.5A Through Hole TO-220 | 9 EGP | View in store |
Price history
Lowest daily price, last 90 days
Lowest price recorded: 9 EGP
About this product
The BT149D is a 400 V, 0.5 A thyristor (silicon-controlled rectifier) in a through-hole TO-220 package. It acts as a latching switch for controlling power in small-load switching and control circuits.
Specifications
- Device Type
- Thyristor (SCR)
- Voltage
- 400 V
- Current
- 0.5 A
- Package
- TO-220
- Mounting Style
- Through hole
Frequently asked questions
What is the price of BT149D Thyristor 400V 0.5A TO-220 in Egypt?
BT149D Thyristor 400V 0.5A TO-220 currently costs 9 EGP in Egypt.
Where can I buy BT149D Thyristor 400V 0.5A TO-220 in Egypt?
BT149D Thyristor 400V 0.5A TO-220 is available from Makers Electronics. Compare the offers above to find the best price.
How is a thyristor turned on and off?
A gate current pulse turns it on, and it stays conducting after the gate signal is removed. It turns off only when the anode current drops below the holding current, typically when the load current reaches zero in AC circuits.
Can this thyristor switch AC directly?
A thyristor conducts in one direction only. For full-wave AC control, use a triac, or two thyristors connected back to back, or a bridge rectifier arrangement.
