Thyristor Holding Current Calculator
Screen measured post-gate-removal thyristor current against caller holding threshold, not relatching automatically when current recovers; ideal sampled threshold model excludes turnoff/recovery time and circuit safety.
Description
A holding-current model stays released after its first drop below threshold.
A holding-current model stays released after its first drop below threshold. A later current rise does not automatically retrigger the device.1
Enter a nonempty nonnegative post-gate-removal current list, positive holding threshold and initial latch boolean. Return binary state history and first releasing sample index, or −1 if none; initially unlatched stays zero with −1.
When to use Thyristor Holding Current Calculator
Use Thyristor Holding Current Calculator when you need to evaluate the supplied records under the calculation and evidence rules below. No recovery time, commutation dynamics or circuit safety is modeled.
Prepare measured device or circuit evidence with matched frequency, temperature, waveform and calibration conditions. Supply explicit caller ratings and limits.
How to use Thyristor Holding 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 postGateRemovalCurrentSamplesA, callerHoldingCurrentA, initiallyLatched using the field table and calculation rules, then run the tool.
- Read idealRemainingLatchedFlags, firstBelowHoldingSampleIndex. 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 |
|---|---|---|---|
| postGateRemovalCurrentSamplesA | Post gate removal current samples a | list of number | Required |
| callerHoldingCurrentA | Caller holding current a | number | Required |
| initiallyLatched | Initially latched | boolean | Required |
Enter a nonempty nonnegative post-gate-removal current list, positive holding threshold and initial latch boolean. Return binary state history and first releasing sample index, or −1 if none; initially unlatched stays zero with −1.
latchedNext=latched and current≥holdingThreshold Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| idealRemainingLatchedFlags | Ideal remaining latched flags | list of number |
| firstBelowHoldingSampleIndex | First below holding sample index | number |
{
"input": {
"postGateRemovalCurrentSamplesA": [
0.2,
0.15,
0.05,
0.2
],
"callerHoldingCurrentA": 0.1,
"initiallyLatched": true
},
"output": {
"idealRemainingLatchedFlags": [
1,
1,
0,
0
],
"firstBelowHoldingSampleIndex": 2
}
}Limitations and assumptions
No recovery time, commutation dynamics or circuit safety is modeled.
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.
Alternative or Complementary methods
Use Thyristor Latching Current Calculator: Thyristor latching depends on anode current when gate drive ends. Gate-rating evidence is a separate necessary input. For a complementary task, use Latchup Holding Voltage Calculator: A descending latchup sweep can bracket a release threshold between samples. Subsample voltage should not be invented.
References
-
Thyristor Holding Current Calculator — tool.io
Similar or alternative tools
- Thyristor Latching Current Calculator
Thyristor latching depends on anode current when gate drive ends. Gate-rating evidence is a separate necessary input.
- Latchup Holding Voltage Calculator
A descending latchup sweep can bracket a release threshold between samples. Subsample voltage should not be invented.