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DZD 35.00
Diodes
231 results
Rectifier diodes, Schottky, Zener, TVS, bridge rectifiers and signal diodes, in through-hole packages (DO-41, DO-35, DO-15) or SMD, for power supplies, repair boards and electronic projects.
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231 results
89 available
New
DZD 35.00
DZD 65.00
DZD 50.00
P2026090714
Power Zener Diode BZY91 C43R, DO-5
DZD 280.00
P2026090694
Zener Diode, BZX84C10 10V 300mW SOT–23 SMD
DZD 50.00
DZD 50.00
DZD 35.00
DZD 25.00
P2026090645
Schottky Diode 1N5817 - SS12 (SMD), 1A / 20V
DZD 15.00
DZD 50.00
DZD 50.00
P2026080608
Bridge Rectifier, GBJ3510 35A 1000V
DZD 280.00
P2026080558
Schottky Barrier Diode, D3S4M 3A -40V
DZD 35.00
DZD 25.00
DZD 10.00
Choosing the right diode for your project
A diode is chosen first on its function. To rectify mains or transformer output, take a rectifier diode like the 1N4007 (1 A / 1000 V) or, for more current, a 1N5408, an RL207, or even a 6A10 or 10A10. If the project calls for bridge rectification, an integrated package such as the DB104, DB107s, MB10S or KBPC3512 replaces four diodes and simplifies wiring.
Two parameters not to overlook: the maximum reverse voltage (VRRM), with a margin of at least twice the peak voltage, and the average current, taking the package's cooling into account.
- Schottky (1N5819, SS14, SK34A): low voltage drop and fast switching — switch-mode power supplies, DC-DC outputs, reverse-polarity protection.
- Zener (BZX85C, BZV55C, 1/2 W and 1 W series): voltage reference or limiting; choose the Zener voltage, then the power dissipated.
- Signal and fast switching (1N4148, 1N4148W, LL4148): logic, detection, small signals.
- Fast / ultra-fast (UF4007, FR207, FFPF06U20S): high-frequency switching, freewheeling.
- TVS: surge clamping on inputs and data lines.
The rest of the semiconductors can be found in the Components category.
Frequently asked questions
What is the difference between a 1N4007 and a 1N4148?
The 1N4007 is a rectifier diode rated 1 A / 1000 V, made for mains and power supplies. The 1N4148 is a fast signal diode (75 V, 200 mA) intended for logic and small signals; it cannot handle the current of a power supply.
Why use a Schottky diode rather than a standard diode?
A Schottky such as the 1N5819 or SS14 has a forward drop of about 0.3 to 0.5 V instead of 0.7 V, and switches much faster. This reduces losses in switch-mode power supplies and DC-DC converters, but its leakage current is higher and its reverse voltage is often lower.
How do you choose the voltage of a Zener diode?
You pick the Zener voltage equal to the voltage to be stabilized or limited (for example 5.1 V, 12 V, 18 V), then the power rating according to the current flowing through it: 1/2 W for a simple reference, 1 W or more if it needs to absorb current. A series resistor is always required.
Can a diode bridge replace four separate diodes?
Yes, a bridge such as the DB104, MB10S or KBPC3512 contains the four diodes already wired as a Graetz bridge. You just need to respect the current and reverse voltage ratings, and provide cooling for high-current models.
What makes the price of a diode vary?
The current and reverse voltage rating, the type (standard, Schottky, ultra-fast, precision Zener), the package (through-hole or SMD) and the manufacturer. A signal diode remains far more affordable than a high-current bridge or a high-voltage module.