Los triacs alternistores QJxx16xHx y littelfuse (COMD024S)

Written by: INCB
Category: Nuevos Componentes , Industria y Noticias

Los triacs, que también son conocidos por alternistores, son componentes muy útiles en el control de cargas de corriente alterna. En este artículo destacamos la serie QJxx16Hz de Littelfuse de triacs alternistores 16 A para aplicaciones de hasta 600 V. El artículo se basa en la documentación de Mouser Electronics y del datasheet de Littelfuse, ambos accesibles en los links a continuación.

https://br.mouser.com/new/littelfuse/littelfuse-qjxx16xhx-alternistor-triacs/ 

https://br.mouser.com/datasheet/2/240/Littelfuse-3074937.pdf 

 

Figura 1- Las carcasas
Figura 1- Las carcasas | Clique na imagem para ampliar |

 

 

Los triacs de esta serie están proyectados para proporcionar un fácil manejo térmico y alta capacidad de sobretensión. Aquellos triacs operan en los cuadrantes I, II y III siendo ideales para aplicaciones que requieren alta capacidad de conmutación.

 

Figura 2 - Los cuadrantes operativos
Figura 2 - Los cuadrantes operativos

 

 

La sobrecorriente máxima de estos triacs alcanza los 200 A por medio ciclo y la temperatura máxima de juntura es de 150º C.

La carcasa, como se muestra en la figura 1, es TO-220 lo que garantiza una excelente robustez. Las versiones están aisladas internamente con la opción TO-218.

Entre las aplicaciones sugeridas están:

* Control de calentadores como cafeteras, calentadores de agua sin tanque y

calentadores infrarrojos

* Relés de estado sólido CA

* Dimmers de luz que incluyen iluminación LED e incandescente

* Control de velocidad del motor en electrodomésticos de cocina, herramientas

eléctricas, casa/belleza/electrodomésticos y aplicaciones industriales ligeras

como compresores

*Control de motores.

En la figura 3 tenemos un gráfico que muestra el comportamiento térmico de los dispositivos.

 

Figura 3 - Temperatura máxima permitida en función de la corriente RMS(on)
Figura 3 - Temperatura máxima permitida en función de la corriente RMS(on) | Clique na imagem para ampliar |

 

 

Una información importante para proyectos que se puede encontrar en datasheet de 9 páginas es el referente a las sensibilidades de disparo en los diversos cuadrantes que se muestran en el gráfico a continuación.

 

Figura 4 - Sensibilidad y otras características según el tipo
Figura 4 - Sensibilidad y otras características según el tipo | Clique na imagem para ampliar |

 

 

El datasheet tiene toda la información que el proyectista necesita para elegir el producto adecuado para su aplicación. Vea más en los links.

 

 

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