Thyristor Latching Current Calculator
Audit actual anode current at gate-pulse end against supplied latching current and independent gate-rating evidence; differs from post-trigger holding waveform and does not verify reliable device latching or safe drive.
Description
Thyristor latching depends on anode current when gate drive ends.
Thyristor latching depends on anode current when gate drive ends. Gate-rating evidence is a separate necessary input.1
Enter aligned nonnegative current/time observations with at least two strictly increasing times, gate end within coverage, positive threshold and gate-rating boolean. Linearly interpolate gate-removal current; return current, signed margin and inclusive combined gate.
When to use Thyristor Latching Current Calculator
Use Thyristor Latching Current Calculator when you need to evaluate the supplied records under the calculation and evidence rules below. No device latching guarantee, gate circuit design or safe drive certification is supplied.
Prepare measured device or circuit evidence with matched frequency, temperature, waveform and calibration conditions. Supply explicit caller ratings and limits.
How to use Thyristor Latching Current Calculator and understand its results
- Prepare measured device or circuit evidence with matched frequency, temperature, waveform and calibration conditions. Supply explicit caller ratings and limits.
- Enter observationTimesUs, anodeCurrentsA, gatePulseEndUs, callerLatchingCurrentA, callerGatePulseRatingSatisfied using the field table and calculation rules, then run the tool.
- Read observedAnodeCurrentAtGateRemovalA, signedLatchingCurrentMarginA, idealLatchingCurrentConditionSatisfied. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| observationTimesUs | Observation times us | list of number | Required |
| anodeCurrentsA | Anode currents a | list of number | Required |
| gatePulseEndUs | Gate pulse end us | number | Required |
| callerLatchingCurrentA | Caller latching current a | number | Required |
| callerGatePulseRatingSatisfied | Caller gate pulse rating satisfied | boolean | Required |
Enter aligned nonnegative current/time observations with at least two strictly increasing times, gate end within coverage, positive threshold and gate-rating boolean. Linearly interpolate gate-removal current; return current, signed margin and inclusive combined gate.
margin=interpolatedCurrent−latchingCurrent; gate=ratingEvidence and margin≥0 Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| observedAnodeCurrentAtGateRemovalA | Observed anode current at gate removal a | number |
| signedLatchingCurrentMarginA | Signed latching current margin a | number |
| idealLatchingCurrentConditionSatisfied | Ideal latching current condition satisfied | boolean |
{
"input": {
"observationTimesUs": [
0,
10,
20
],
"anodeCurrentsA": [
0,
0.2,
0.3
],
"gatePulseEndUs": 10,
"callerLatchingCurrentA": 0.15,
"callerGatePulseRatingSatisfied": true
},
"output": {
"observedAnodeCurrentAtGateRemovalA": 0.2,
"signedLatchingCurrentMarginA": 0.05000000000000002,
"idealLatchingCurrentConditionSatisfied": true
}
}Limitations and assumptions
No device latching guarantee, gate circuit design or safe drive certification is supplied.
Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Numeric lists are limited to 10,000 entries; string lists to 128 strings of at most 128 characters each. The rules above may impose smaller limits. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors. A successfully returned false flag is an evaluated outcome; its meaning is explained above.
Alternative or Complementary methods
Use Thyristor Holding Current Calculator: A holding-current model stays released after its first drop below threshold. A later current rise does not automatically retrigger the device. For a complementary task, use Hall Sensor Switch Point Calculator: A Hall Schmitt switch keeps state between operate and release thresholds. Initial state therefore matters.
References
-
Thyristor Latching Current Calculator — tool.io
Similar or alternative tools
- Thyristor Holding Current Calculator
A holding-current model stays released after its first drop below threshold. A later current rise does not automatically retrigger the device.
- Hall Sensor Switch Point Calculator
A Hall Schmitt switch keeps state between operate and release thresholds. Initial state therefore matters.