
Allicdata Part #: | P123616-ND |
Manufacturer Part#: |
ERZ-U21JP112B |
Price: | $ 589.65 |
Product Category: | Circuit Protection |
Manufacturer: | Panasonic Electronic Components |
Short Description: | DELTATRANSIENT/SURGE ABSORBERS10 |
More Detail: | Varistor 3 Circuit Chassis Mount Module |
DataSheet: | ![]() |
Quantity: | 1000 |
Lead Free Status / RoHS Status: | Lead free / RoHS Compliant |
1 +: | $ 536.03600 |
10 +: | $ 527.78900 |
Series: | ZNR® |
Part Status: | Active |
Lead Free Status / RoHS Status: | -- |
Maximum AC Volts: | 528V |
Energy: | -- |
Number of Circuits: | 3 |
Operating Temperature: | -40°C ~ 70°C (TJ) |
Mounting Type: | Chassis Mount |
Package / Case: | Module |
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TVS (transient voltage surge suppressor) varistors, also known as surge absorbers, are non-linear components designed to absorb short-term energy and release it harmlessly in the form of heat. MOVs (metal oxide varistors) have been used extensively in AC power distribution networks to suppress or limit transient overvoltages. This article will explain the application field and working principle of the ERZ-U21JP112B.
ERZ-U21JP112B Application Field
The ERZ-U21JP112B is designed for transient voltage suppressor (TVS) applications, which protect circuits from overvoltage, electrostatic discharges (ESD), and other transients. This part can be used in a wide range of applications, such as:
- Lighting control systems
- Telecommunication systems
- Automotive electronics
- Power supplies
- Test and measurement equipment
- Industrial control systems
ERZ-U21JP112B Working Principle
The ERZ-U21JP112B is a bidirectional, nonlinear, metal-oxide varistor (MOV). It is designed to clamp, absorb, and reduce transients by lowering the voltage level. The device redirects excessive voltages above the clamping voltage and dissipates the energy associated with them. The device also blocks DC and low frequency signals, thus providing increased protection against surges, ESD, and EMI.
When the voltage across the MOV is below its rated maximum clamping voltage, the MOV acts as an open circuit and provides high impedance. When the voltage exceeds the maximum clamping voltage, the resistance of the MOV drops dramatically. Current is then allowed to pass through it, resulting in a rapid voltage decrease. The energy resulting from the excessive voltage is then dissipated as heat.
When the stress is removed from the MOV, the device resumes its nonlinear, high impedance state. It should be noted that the device will deteriorate each time it absorbs a transient, resulting in a decrease of clamping voltage. As such, periodic checking of the clamping voltage of the MOV is recommended.
Conclusion
In conclusion, the ERZ-U21JP112B is an MOV designed for TVS applications. It works by redirecting excessive voltages above the clamping voltage, dissipating the energy associated with them, and providing increased protection against surges, ESD, and EMI.
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