1N5819 Schottky Barrier Rectifier Diode
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1N5819 Schottky Barrier Rectifier Diode
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Product Details
1N5819 Schottky Barrier Rectifier Diode – Technical Specifications:
Component Type – Schottky Barrier Rectifier Diode
Package – DO-41 Through-Hole
Peak Reverse Voltage – 40V
Forward Current – 1A
Forward Voltage Drop – ~0.3–0.4V (Low)
Reverse Recovery Time – Very Fast (Schottky)
Cathode Marking – Stripe Band
1: Schottky diodes have a much lower forward voltage drop (~0.3–0.4V) than standard silicon diodes (~0.7V) — this means less power wasted as heat, making the 1N5819 the preferred choice for efficiency-critical circuits.
2: Commonly used for reverse polarity protection on battery-powered projects — the low forward drop minimises voltage loss compared to a standard diode in the same role.
3: Ideal as a flyback/snubber diode across relay coils and small inductive loads, where its very fast switching helps suppress voltage spikes more effectively than a standard rectifier.
4: The 40V reverse voltage rating means it is suited to low-voltage DC circuits (5V–24V systems) rather than mains-level applications.
5: The cathode (negative leg) is marked with a stripe band — always check orientation before soldering, especially in reverse-protection circuits where polarity is critical.
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