Leading Power Semiconductor Manufacturer
Parameter Symbols

The Ultimate Guide to Decoding Symbolic Parameters in Datasheets


In the world of electronic components and devices, symbols and parameters hold the key to unraveling the intricate details and capabilities of products. At LJ-MD, we recognize the significance of these fundamental elements in enabling a comprehensive understanding of our offerings. In this post, we will delve into how LJ-MD harnesses the power of symbols and parameters to empower our customers with valuable insights and facilitate informed decision-making.


Symbols serve as visual representations, succinctly communicating essential information about the characteristics and features of electronic components. At LJ-MD, we employ standardized symbols across our datasheets, ensuring consistency and clarity. From electrical characteristics to mechanical specifications and environmental ratings, our datasheets utilize symbols to convey vital information in a concise and easily interpretable manner.


Parameters, on the other hand, provide detailed numerical values and measurements, offering precise quantitative information about our products. At LJ-MD, we meticulously define and include a wide range of parameters in our datasheets, covering aspects such as voltage ratings, current ratings, frequency response, and more. By providing comprehensive and accurate parameter data, we enable our customers to evaluate our products’ performance and compatibility with their specific requirements.


At LJ-MD, we understand the importance of transparency and accessibility. We strive to make our datasheets comprehensive resources that empower our customers to make informed decisions. Our dedication to providing detailed symbols and parameters ensures that customers can easily navigate and understand our product offerings, leading to successful project planning and implementation.


With LJ-MD’s commitment to quality and precision, our customers can trust that the symbols and parameters provided in our datasheets are reliable and accurate. We continually update and refine our datasheets to ensure they remain up-to-date with the latest industry standards and specifications.

In conclusion, symbols and parameters play a vital role in enhancing product understanding, and at LJ-MD, we leverage their power to provide our customers with comprehensive and reliable information. By utilizing standardized symbols and providing detailed parameters in our datasheets, we aim to empower our customers to make informed decisions and achieve successful outcomes in their electronic projects. Trust LJ-MD for exceptional products backed by transparent and accessible documentation that utilizes symbols and parameters to unlock the true potential of our offerings.

(diT/dt)critCritical Rate of Rise of On-State Current
(duD/dt)critCritical Rate of Rise of Off-State Voltage
IDRM/IRRMRepetitive Peak Reverse Current/Repetitive Peak Off-State Current
IF(AV)Average Forward Current
IFMPeak Collector Current
IF(RMS)RMS forward current
IFSMSurge forward current
IT(AV)Average on-state current
ITMPeak on-state current
IT(RMS)RMS on-state current
ITSMSurge on-state current
IRRMRepetitive peak reverse current
IDRMRepetitive peak off-state current
IdAverage convertor output current
IGGate current
IGTGate trigger current
IGDGate un-trigger current
IHHolding current
ILLatching Current
I2tMaximum rated value I2T
IrrReverse recovery peak current
QrrReverse Recovery Charge
VRRMRepetitive peak reverse voltage
VDRMRepetitive peak off-state voltage
VFForward voltage
VFMPeak forward voltage drop
VTOn-state voltage
VTMPeak on-state voltage drop
VGOn-state voltage
VGTGate trigger voltage
VGDGate un-trigger voltage
VDAverage convertor output voltage
VisoInsulation voltage
VRMSRMS voltage value
VTOOn-state threshold voltage
VFOForward threshold volate
di/dtRate of rise of on-state current
dv/dtRate of rise of on-state voltage
rTThermal Resistance
rFForward slope resistance
RthThermal resistance
Rth(j-c)Thermal resistance (junction to case)
Rth(j-hs)Thermal resistance (junction to heatsink)
Rth(c-hs)Thermal resistance (case to heatsink)
Rth(hs-a)Thermal resistance (heatsink to ambient)
ZthFlash thermal resistance
TaAmbient temperature
THSHeatsink temperature
TcCase temperature
TstgStorage temperature
TjJunction temperature
TjmMaximum junction temperature
tpPulse time
tdTurn-On Time
tgdGate delay time
tqTurn-Off Time
trRise time
trrReverse recovery time
UDRMRepetitive Peak Reverse Voltage
UFMForward Voltage Drop (maximum)
UGTGate Trigger Voltage
URContinuous Reverse Voltage
URRMRepetitive Peak Off-State Voltage
URSMRepetitive Peak Reverse Voltage (non-repetitive)
URWMRepetitive Peak Reverse Voltage (working)
UTMOn-State Voltage
UT(TO)Threshold Voltage
QrrRecovered charge
M2Mounting power
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