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Zener diodes are designed for operation in a reverse-breakdown mode and are characterized according to their behavior when used in this fashion. Useful as a voltage reference or for voltage limiting purposes, they are also capable of functioning as a one-way valve for current flow in the manner of rectifier diodes, though their behavior in this mode is generally less ideal than that of purpose-built devices. Products within this family implement exactly one instance of this function per device package.
| Select products | Mfr | Description | Package | Supplier Device Package | Mounting Type | Series | Operating Temperature |
|---|---|---|---|---|---|---|---|
![]() 1N4988US $9.55 | Microchip Technology | DIODE ZENER 180V 5W D5B | Bulk | Surface Mount | - | -65°C ~ 175°C | |
![]() 1N4988US/TR $10.40 | Microchip Technology | DIODE ZENER 180V 5W E-MELF | Tape & Reel (TR),Cut Tape (CT) | Surface Mount | - | -65°C ~ 175°C (TJ) | |
![]() 1N4989 $7.24 | Microchip Technology | DIODE ZENER 200V 5W AXIAL | Bulk | Through Hole | - | -65°C ~ 175°C | |
![]() 1N4989CUS $19.07 | Microchip Technology | DIODE ZENER 200V 5W E-MELF | Bulk | Surface Mount | - | -65°C ~ 175°C (TJ) | |
![]() 1N4989CUS/TR $20.66 | Microchip Technology | DIODE ZENER 200V 5W E-MELF | Tape & Reel (TR),Cut Tape (CT) | Surface Mount | - | -65°C ~ 175°C (TJ) | |
![]() 1N4989US $9.55 | Microchip Technology | DIODE ZENER 200V 5W D5B | Bulk | Surface Mount | - | -65°C ~ 175°C | |
![]() 1N4989US/TR $10.40 | Microchip Technology | DIODE ZENER 200V 5W E-MELF | Tape & Reel (TR),Cut Tape (CT) | Surface Mount | - | -65°C ~ 175°C (TJ) | |
![]() 1N4990 $9.58 | Microchip Technology | DIODE ZENER 220V 5W E-AXIAL | Bulk | Through Hole | - | -65°C ~ 175°C (TJ) |

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