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Use when working with MOSFET similarity calculations - comparing MOSFET MPNs, understanding N-channel/P-channel matching, equivalent groups like IRF530/STF530, or MOSFET-specific similarity logic.
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
SOC 職業分類に基づく
Use when refactoring, cleaning up, or enhancing the lib-electronic-components codebase. Provides guidance on architecture patterns, known issues, duplication hotspots, and recommended improvements.
Base skill for working with electronic components in this library. Use when adding new component types, manufacturer handlers, or working with MPN (Manufacturer Part Number) operations, BOM entries, or component classification.
Use this skill BEFORE creating a PR to ensure all documentation, skills, and learnings are updated. Critical for preserving institutional knowledge and preventing documentation drift.
Use when working with component similarity calculations - comparing MPNs, finding equivalent parts, implementing new similarity calculators, or understanding how component matching works.
Use when working with capacitor similarity calculations - comparing ceramic/electrolytic/film capacitor MPNs, understanding value/voltage/dielectric matching, or capacitor-specific similarity logic.
Use when working with connector similarity calculations - comparing connector MPNs, understanding pin count/pitch/family matching, or connector-specific similarity logic.
| name | similarity-mosfet |
| description | Use when working with MOSFET similarity calculations - comparing MOSFET MPNs, understanding N-channel/P-channel matching, equivalent groups like IRF530/STF530, or MOSFET-specific similarity logic. |
Guidance for working with MosfetSimilarityCalculator in the lib-electronic-components library.
For metadata-driven similarity architecture, see /similarity-metadata:
The MosfetSimilarityCalculator compares MOSFETs based on:
ComponentType.MOSFET
ComponentType.MOSFET_INFINEON
ComponentType.MOSFET_ST
ComponentType.MOSFET_NXP
// Any type starting with "MOSFET_"
Note: Returns true for null type to handle unrecognized MOSFETs.
HIGH_SIMILARITY = 0.9; // Equivalent parts
MEDIUM_SIMILARITY = 0.7; // Similar specs
LOW_SIMILARITY = 0.3; // Different channel type or specs
The calculator knows these cross-manufacturer equivalents:
| IRF Part | Equivalents |
|---|---|
| IRF530 | STF530, IRF530N, STF530N |
| IRF540 | STF540, IRF540N, STF540N |
| IRF9530 | STF9530, IRF9530N (P-channel) |
| IRF9540 | STF9540, IRF9540N (P-channel) |
N-channel and P-channel MOSFETs always return LOW_SIMILARITY (0.3)
| Part | Channel | Note |
|---|---|---|
| IRF530 | N-channel | Standard power MOSFET |
| IRF9530 | P-channel | The "9" indicates P-channel |
| IRF540 | N-channel | Higher current than IRF530 |
| IRF9540 | P-channel | Higher current P-channel |
calculator.calculateSimilarity("IRF530", "IRF9530", registry);
// Returns 0.3 (N vs P channel)
The calculator normalizes manufacturer prefixes:
| Manufacturer | Prefix | Example |
|---|---|---|
| International Rectifier | IRF | IRF530 |
| STMicroelectronics | STF | STF530 |
| Vishay | IRF, SIF | SIF530 |
| Infineon | IPD, IPB | IPD530 |
calculator.calculateSimilarity("IRF530", "STF530", registry);
// Returns 0.9 (same part, different manufacturer)
Common suffixes that don't affect equivalence:
N - Updated version (IRF530N ≈ IRF530)PBF - Lead-freeL - Logic level gatecalculator.calculateSimilarity("IRF530", "IRF530N", registry);
// Returns 0.9 (same MOSFET, N is just version)
// Cross-manufacturer equivalent
calculator.calculateSimilarity("IRF530", "STF530", registry);
// Returns 0.9
// N-channel vs P-channel
calculator.calculateSimilarity("IRF530", "IRF9530", registry);
// Returns 0.3
// Different current ratings
calculator.calculateSimilarity("IRF530", "IRF540", registry);
// Returns < 0.9 (14A vs 28A)
// Non-MOSFET parts
calculator.calculateSimilarity("LM358", "LM324", registry);
// Returns 0.0
9 in part number typically indicates P-channelsim(A,B) == sim(B,A)