24V 1N4749 1 Watt Zener Diode
A Zener diode works like a normal diode in the FORWARD direction, but when voltage is applied in the REVERSE direction it does something really useful. At a specified reverse voltage, it starts to conduct. In other words, if you apply, say 12V (for a 12V Zener) across the diode it will start to conduct current. When the Zener starts to draw current this has the effect of regulating the positive (+) voltage. Jaycar carries a range of Zener diodes from 3.3V to 75V.
Features:
| VOLTS | TYPE | WATTS |
24V |
1N4749 | 1 |
A Zener diode works like a normal diode in the FORWARD direction, but when voltage is applied in the REVERSE direction it does something really useful. At a specified reverse voltage it starts to conduct. In other words, if you apply, say 12V (for a 12V Zener) across the diode it will start to conduct current. See diagram: When the Zener starts to draw current, this has the effect of regulating the positive (+) voltage. Note: As the Zener draws current, this will turn into heat. The Zener therefore has a wattage rating (as well as its Zener voltage rating) this may not be exceeded. Jaycar carries a range of Zener diodes from 3.3V to 75V.Fig 1. As positive (+) voltage climbs up to 12 volts the 12V Zener starts to conduct, drawing current 
Packaged Dimensions
| Packaged Volume | 0l |
| Packaged Weight | 0.001kg |
| Packaged Length | 0.2cm |
| Packaged Width | 0.2cm |
| Packaged Height | 6.5cm |
Zener Diodes
| Power Dissipation | 1W |
| Derate above 50°C | 6.67mW/°C |
| Storage Temperature Range | -65°C, 200°C |
| Operating Junction Temperate | 200°C |
| Thermal resistance junction to lead | 53.5°C/W |
| Thermal resistance junction to ambient | 100°C/W |
| Lead temperature (1/16" from case for 10 seconds) | 230°C |
| Surge power | 10W |
Product Availability
| Availability | Stocked item |