Top rated zener diodes

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AI-generated summary · updated July 28, 2026 · verify details before purchase.

1. 

   1 Best overall QfUxYYSLD

   ON Semiconductor 1N4733A Zener Diode

   ★★★★★4.7/5 $64.51

   A 5.1V, 1W zener diode with tight voltage tolerance, widely used in voltage regulation and protection circuits.

   • Accurate voltage regulation
   • High power rating
   • Reliable brand

   • Limited voltage selection

   View on Amazon manufacturer site
2. 

   2 Best budget pick VISHAY

   Vishay BZX84C5V1 Zener Diode

   ★★★★☆4.5/5 $16.95 Only 8 left

   A 5.1V, 250mW surface-mount zener diode perfect for low-power applications and compact designs.

   • Low cost
   • Small SMD package
   • Good tolerance

   • Lower power rating

   View on Amazon manufacturer site
3. 

   3 Best temperature stability Juried Engineering

   NXP BZX79-B5V1 Zener Diode

   ★★★★★4.6/5 $10.29 Only 7 left

   A 5.1V, 400mW zener diode with excellent temperature coefficient, ideal for precision applications.

   • Low temperature coefficient
   • Good stability
   • Through-hole package

   • Moderate power

   View on Amazon manufacturer site
4. 

   4 Best value CHANZON

   Diodes Incorporated 1N5229B Zener Diode

   ★★★★☆4.4/5 $4.99

   A 4.3V, 500mW zener diode offering a great balance of performance and price for general purpose use.

   • Cost-effective
   • Widely available
   • Decent power

   • Higher tolerance variation

   View on Amazon manufacturer site
5. 

   5 Best for voltage regulation HUABAN

   STMicroelectronics 1N4742A Zener Diode

   ★★★★☆4.5/5 $5.49

   A 12V, 1W zener diode capable of handling moderate power, often used in shunt regulators.

   • High power handling
   • Stable voltage
   • Popular value

   • Larger size

   View on Amazon manufacturer site
6. 

   6 Best high-power option BOJACK

   Microchip 1N5349B Zener Diode

   ★★★★☆4.3/5 $6.99

   A 12V, 5W zener diode for high-current regulation and surge protection.

   • Very high power
   • Rugged construction
   • Good for power supplies

   • Expensive
   • Bulky

   View on Amazon manufacturer site
7. 

   7 Best surface-mount value AVLIS-CO

   Comchip CDZV5V1BP Zener Diode

   ★★★★☆4.2/5 $2.99

   A 5.1V, 150mW SMD zener diode, ultra-compact for space-constrained designs.

   • Tiny package
   • Very low cost
   • Lead-free

   • Low power
   • Not for high precision

   View on Amazon manufacturer site
8. 

   8 Best for portable devices Generic

   ROHM VDZT5V1B Zener Diode

   ★★★★☆4.4/5 $23.50

   A 5.1V, 200mW miniaturized zener diode with low leakage, ideal for battery-powered circuits.

   • Low leakage current
   • Small footprint
   • Good reliability

   • Limited power

   View on Amazon manufacturer site
9. 9 Best SMA package

   Toshiba 1SMA4733A Zener Diode

   ★★★★☆4.3/5 $0.30-$0.70

   A 5.1V, 1W surface-mount zener diode in a compact SMA package, good for automated assembly.

   • SMA package easy to solder
   • Good power in SMD
   • Widely stocked

   • Slightly higher cost

   View on Amazon manufacturer site

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