By LEIDITECH | 17 October 2023 | 0 Comments
Leiditehc SMBJ3.3A，SMBJ3.3CADistinctive and worthy of the name
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SMBJ3.3A，SMBJ3.3CABelongs to transient voltage suppressionTVSdiode，Because it's 3.3V，Extremely low voltage，Many factories cannot produce 3.3 ofTVSof。Even if it claims to have done 3.3V，Careful measurementVB、VCWill discover，Significantly higher than 3.3 Product requirements。
Leiditech EMCLittle brother，encounter A customer，Take from other manufacturersSMBJ3.3ATo compare prices，Finally, I chose a cheaper manufacturer。Lei Mao, who is meticulous and highly professional in his workEMCLittle brother，By analyzing and comparing electrical parameters，Discovered significant differences in parameters between the two，To achieve the parameters of Lei Mao，Believe that the cost of the other party's factory will also be high。
How to compareTVSWhat about the parameters？Lei MaoEMCLittle brother, make the following analysis and comparison：
one．TVSSelection Techniques：
1. TVSofVRShould be 10 higher% The maximum DC or continuous operating voltage of the protected circuit mentioned above、The rated standard voltage of the circuit and “high-end”Tolerance。If selectedVrwmToo low，The device may enter an avalanche or affect the normal operation of the circuit due to excessive reverse leakage current。Serial connection voltage sharing，Parallel connection current sharing。
2. TVSofVBThere are minimum, maximum, and typical values，VBnearVRgood，VBThe smaller the better。
3. TVSofVcShould be less than the damaged voltage of the protected circuit。
4. TVSPower ofPppShould be greater than the peak pulse power that may occur in the protected circuit。
5. TVSofIppShould be greater than the transient surge current of the circuit。
6. TVSofIRLeakage current，Xiaohao。
7. TVSofItRefers to the test current，currentxresistance=voltage，So when comparing, we need to use the sameITBetter under conditions。
8. Select according to the purposeTVSPolarity and packaging structure of。Selection of bipolar for AC circuitsTVSRelatively reasonable；Semiconductor selection for multi line protectionESDArrays are more advantageous。
two、 Here are several factoriesSMBJ3.3ASpecification parameters：
1.Leiditech Product Parameters
 2.factoryAProduct parameters
 3.factoryBProduct parameters
 three．EMCLittle Brother, the Three FamiliesSMBJ3.3AThe parameters are compared as follows：
 Comparison Conclusion：
becauseSMBJ3.3APay attention to low voltage，identicalITlowerVBR nearVRgood。factoryBUsing 1matest，Lei Mao is 10matest。factoryBNo writingVBMaximum value，Indicating that they are very high and do not want to write anymore。
fromVBandVCThe test conditions and values indicate that。Lei Mao'sSMBJ3.3AIt's real data，True to its name。
More Leiditech products，Please search for the mini program on WeChat“EMCElectromagnetic Compatibility Community”Or Lei Mao's official websiteleiditech.com Welcome to contactEMCLittle brother。
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