1SMB5951B-13 Discrete Semiconductor Products

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	120V
Tolerance:	±5%
Power - Max:	3W
Impedance (Max) (Zzt):	380 Ohms
Current - Reverse Leakage @ Vr:	1µA @ 91.2V
Voltage - Forward (Vf) (Max) @ If:	1.5V @ 200mA
Operating Temperature:	-65°C ~ 150°C
Mounting Type:	Surface Mount
Package / Case:	DO-214AA, SMB
Supplier Device Package:	SMB

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Diodes - Zener - Single

The 1SMB5951B-13 is a single, surface mount, Zener diode designed for general purpose applications. Its compact size and low-profile package ensure it offers a higher level of integration into any space-saving design. This device features a wide dynamic range of operating voltages and current ratings, making it suitable for a variety of Zener applications, such as voltage regulation and voltage clamping.

Design and Specifications

The 1SMB5951B-13 is a small, surface mount, Zener diode packaged in a SOT-23 (3 pin) package. Its small size and low-profile package allow for it to be integrated into space-saving designs. It comes with a maximum reverse voltage rating of 13V and an operating junction temperature range of -65ºC to +150ºC. This device also has a maximum thermal resistance of 300K/W. The 1SMB5951B-13 uses a P-type semiconductor, anodized insulation, and an FEED+ passivation layer. It has a low dynamic impedance and an excellent power dissipation capacity. This device has series, multi-device, and reverse polarity protection.

Working Principle

The 1SMB5951B-13 is designed to operate in Zener mode. When the forward voltage is more than the reverse voltage, the diode operates in a semi-conductor forward bias state. The current then will flow through the diode with no restrictions and the voltage across the diode will remain at a constant VZ. When the voltage applied to the diode exceeds the VZ and to a level which is determined by the design of the diode, the diode reverse-biases and only a very small current passes through the diode (known as the Zener current. This current ensures that the voltage across the diode remains uniform and equal to VZ.

Application Field

The 1SMB5951B-13 can be used in various applications such as voltage regulation, voltage clamping, and surge suppression. It is commonly used in low-power electronic devices such as Voltage Regulated Modules (VRMs), Uninterrupted Power Supplies (UPSs), cell phone base stations, wireless data modems and routers, portable devices, and in other automotive applications. In portable devices, the 1SMB5951B-13 is used to keep the voltage steady and to protect the system from overvoltage conditions. In automotive applications, the 1SMB5951B-13 is used for voltage suppression, overvoltage and short circuit protection. It is also used in the power supply and voltage sensing circuits of automotive lighting and control systems.

Conclusion

The 1SMB5951B-13 is a single, surface mount, Zener diode designed for general purpose applications. It is packaged in a low-profile SOT-23 format, with a wide dynamic range of operating voltages and current ratings. This diode can be used in various applications such as voltage regulation, voltage clamping and surge suppression. It is a highly reliable device that offers excellent performance in many low-power electronic equipment and automotive applications.

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