MASMCJ51A

Voltage - Clamping (Max) @ Ipp:	82.4V
Supplier Device Package:	DO-214AB (SMCJ)
Package / Case:	DO-214AB, SMC
Mounting Type:	Surface Mount
Operating Temperature:	-65°C ~ 150°C (TJ)
Capacitance @ Frequency:	--
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	1500W (1.5kW)
Current - Peak Pulse (10/1000µs):	18.2A
Series:	Military, MIL-PRF-19500
Voltage - Breakdown (Min):	56.7V
Voltage - Reverse Standoff (Typ):	51V
Unidirectional Channels:	1
Type:	Zener
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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MASMCJ51A TVS - Diodes The MASMCJ51A is a Transient Voltage Suppression (TVS) diode belonging to the family of JEDEC\'s (Joint Electron Device Engineering Council) tvs devices.typical TVS diode usage is for the suppression and absorption of electrical transients. The MASMCJ51A is categorized within TVS diodes for its wide range of features, affordable costs and high efficiency for various applications. The MASMCJ51A is a two-terminal TVS bi-directional device with an encapsulated silicone body. It is specifically designed to protect sensitive electronic circuits from voltage transients. It provides bidirectional clamping and will protect any electronic system and component up to the rated voltage. The MASMCJ51A also has a low capacitance, which helps reduce noise and disruption when the TVS diode is activated. The MASMCJ51A is also capable of operating in environments up to 175°C. The MASMCJ51A is an ideal device for automotive, industrial and telecom applications, since it provides efficient clamping to voltage transients seen in these environments. Typical applications of this device include industrial control circuits, motor control circuits, telecom protection, and portable/mobile devices. The device is capable of operation in AC and DC circuits and has a wide surge capability. The primary purpose of a TVS diode is its ability to dissipate energy by clamping the large voltage spikes on the circuit and passing it to the ground. When this happens, the MASMCJ51A’s breakdown voltage is used during the overload current flow. This breakdown voltage is determined by the junction breakdown of the device and should correspond with the peak voltage spike which the device is protecting against. The MASMCJ51A works on the principle of avalanche breakdown. This occurs when the electric field strength in the semiconductor junction reaches a critical level at which point the minority charge carriers in the junction are freed from their atoms and become free to contribute to the current flow. This sudden large increase in current is referred to as an avalanche current and causes the voltage drop across the junction to increase rapidly. When the applied voltage is less than the operating voltage, the device operates in a diode rectifier mode. At this point, current will only flow from the anode to the cathode. However, when the potential across the junction exceeds the breakdown voltage of the device, it switches over to avalanche mode like a switch and then behaves like a low-value resistor with a resistance of about 7 ohms. The device will stay in this mode until the voltage across it is below the avalanche voltage. The MASMCJ51A is able to absorb current up to 17.5A at peak transient current without reaching its maximum power dissipation rate. This minimum clamping voltage for a standard 1 watt device is 57 volts with a maximum power rating of 250 watts. The MASMCJ51A is a unidirectional device, meaning it can only be installed one way, with the anode towards the source and the cathode towards the load. The device can also be used in series with a transistor allowing for the activation of a circuit in the event of a surge.In conclusion, the MASMCJ51A is a ubiquitous TVS diode suitable for a wide variety of applications. It is capable of operation at temperatures up to 175°C and possesses a wide range of features such as low capacitance, surge capability, and a wide clamping voltage range. The device works on the principle of avalanche breakdown and provides superior protection for electronic circuits against voltage transients.

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