Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Voltage - Zener (Nom) (Vz):	4.3V
Tolerance:	±10%
Power - Max:	3W
Impedance (Max) (Zzt):	6 Ohms
Current - Reverse Leakage @ Vr:	5µA @ 1V
Voltage - Forward (Vf) (Max) @ If:	1.2V @ 200mA
Operating Temperature:	-55°C ~ 150°C
Mounting Type:	Surface Mount
Package / Case:	DO-216AA
Supplier Device Package:	DO-216AA
Base Part Number:	1PMT5916

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Diodes - Zener - Single

1PMT5916A/TR7 is a silicon single-chip Zener diode, a unique component type found in circuits in practically all electronics devices. It is commonly employed in low-voltage and switching applications, as well as other functions such as noise suppression, overvoltage protection, and the clamping of unwanted signals.

Application Field

1PMT5916A/TR7 is used to stabilize constant-voltage circuits and prevent over-voltage spikes. It is commonly found as part of power supplies, switching power converters, DC-dc converters, and other power supply components. When used in converters, the 1PMT5916A/TR7 is typically placed in the low-current section of the circuitors. It is also used in low-voltage devices or circuits that require a very stable voltage. 1PMT5916A/TR7 can also be employed to suppress electrical noise. It is used in circuits that require a higher tolerance for interferring signals and in communication devices where a higher signal-to-noise ratio is desired. In addition, 1PMT5916A/TR7 can be used as a protective component, as it will automatically break the current when the voltage spikes.

Working Principle

1PMT5916A/TR7 is composed of a PN junction and an internal dielectric. The PN junction serves to prevent the flow of currents in modes other than a specific, predetermined value. Since the principle of operation is similar to that of a regular diode, the 1PMT5916A/TR7 behaves the same way, except with some additional components the facilitate the regulation of the current flow. At the PN junction, the diode has two states: forward-bias and reverse-bias. When Reverse-biased (negative to positive), the diode\'s inherent resistance is such that the applied voltage must exceed a specific threshold value before any current flow is allowed to occur. The 1PMT5916A/TR7 sets this threshold, or valley voltage, and is expressed by the device\'s specification Zener voltage. When Forward-biased (positive to negative), the current flow is allowed, but will be limited by the internal resistance of the diode. The denser the dielectric layer, the lower the current and the less volatile the voltage. 1PMT5916A/TR7 is designed to provide a stable, constant voltage to its load, regardless of the applied current. The precision of the 1PMT5916A/TR7, as expressed by its tolerance value, is a measure of its accuracy in regulating current. The higher the tolerance, the more accurately it can regulate the current. In addition, the 1PMT5916A/TR7 has a reverse voltage breakdown capability, which is a measure of the maximum voltage that can be applied in reverse bias before current flows. Typical breakdown voltages for the 1PMT5916A/TR7 range from 4V to 36V.

Conclusion

1PMT5916A/TR7 is a versatile silicon single-chip Zener diode, designed to provide a regulated voltage in switching, low voltage, and noise suppression applications. It is composed of a PN junction, an internal dielectric, and has a reverse voltage breakdown capability, which enables it to take in an excessive voltage and break it down into a safe and manageable level. The 1PMT5916A/TR7 is designed to deliver a stable, constant voltage to its load, regardless of the applied current, and provides precision regulation of current flow with its tolerance value.

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