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Who published Similarity Mosfet?

majiayu000 (@majiayu000) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Similarity Mosfet by majiayu000 — Agent Skill

Name: Similarity Mosfet
Rating: 4.2 (5 reviews)
Author: majiayu000

File contents

MOSFET Similarity Calculator Skill

Guidance for working with MosfetSimilarityCalculator in the lib-electronic-components library.

Overview

The MosfetSimilarityCalculator compares MOSFETs based on:

Equivalent groups - Cross-manufacturer equivalents
Channel type - N-channel vs P-channel
Electrical characteristics - Voltage, current ratings

Applicable Types

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.

Similarity Thresholds

HIGH_SIMILARITY = 0.9;   // Equivalent parts
MEDIUM_SIMILARITY = 0.7; // Similar specs
LOW_SIMILARITY = 0.3;    // Different channel type or specs

Equivalent Groups

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)

Channel Type Rules

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)

Manufacturer Prefix Handling

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)

Suffix Handling

Common suffixes that don't affect equivalence:

N - Updated version (IRF530N ≈ IRF530)
PBF - Lead-free
L - Logic level gate

calculator.calculateSimilarity("IRF530", "IRF530N", registry);
// Returns 0.9 (same MOSFET, N is just version)

Test Examples

// 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

Implementation Notes

Returns 0.0 for non-MOSFET MPNs
The 9 in part number typically indicates P-channel
Symmetry: sim(A,B) == sim(B,A)

Learnings & Quirks

Part Number Patterns

IRF5xx/IRF6xx: N-channel power MOSFETs
IRF95xx/IRF96xx: P-channel equivalents
The xx number often indicates Vds rating (e.g., 530 ≈ 100V)

Cross-Manufacturer Equivalence

STF = ST equivalent to IRF
Many manufacturers make "drop-in" replacements
Check Vds, Rds(on), and Id specs for true equivalence

Package Variants

TO-220: Standard through-hole
TO-220F: Isolated tab
D-PAK: Surface mount
Same electrical part in different package = HIGH_SIMILARITY

---name: similarity-mosfet-2description: 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.---# MOSFET Similarity Calculator SkillGuidance for working with `MosfetSimilarityCalculator` in the lib-electronic-components library.## OverviewThe `MosfetSimilarityCalculator` compares MOSFETs based on:- **Equivalent groups** - Cross-manufacturer equivalents- **Channel type** - N-channel vs P-channel- **Electrical characteristics** - Voltage, current ratings## Applicable Types```javaComponentType.MOSFETComponentType.MOSFET_INFINEONComponentType.MOSFET_STComponentType.MOSFET_NXP// Any type starting with "MOSFET_"```Note: Returns `true` for `null` type to handle unrecognized MOSFETs.## Similarity Thresholds```javaHIGH_SIMILARITY = 0.9; // Equivalent partsMEDIUM_SIMILARITY = 0.7; // Similar specsLOW_SIMILARITY = 0.3; // Different channel type or specs```## Equivalent GroupsThe 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) |## Channel Type Rules**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 |```javacalculator.calculateSimilarity("IRF530", "IRF9530", registry);// Returns 0.3 (N vs P channel)```## Manufacturer Prefix HandlingThe calculator normalizes manufacturer prefixes:| Manufacturer | Prefix | Example ||--------------|--------|---------|| International Rectifier | IRF | IRF530 || STMicroelectronics | STF | STF530 || Vishay | IRF, SIF | SIF530 || Infineon | IPD, IPB | IPD530 |```javacalculator.calculateSimilarity("IRF530", "STF530", registry);// Returns 0.9 (same part, different manufacturer)```## Suffix HandlingCommon suffixes that don't affect equivalence:- `N` - Updated version (IRF530N ≈ IRF530)- `PBF` - Lead-free- `L` - Logic level gate```javacalculator.calculateSimilarity("IRF530", "IRF530N", registry);// Returns 0.9 (same MOSFET, N is just version)```## Test Examples```java// Cross-manufacturer equivalentcalculator.calculateSimilarity("IRF530", "STF530", registry);// Returns 0.9// N-channel vs P-channelcalculator.calculateSimilarity("IRF530", "IRF9530", registry);// Returns 0.3// Different current ratingscalculator.calculateSimilarity("IRF530", "IRF540", registry);// Returns < 0.9 (14A vs 28A)// Non-MOSFET partscalculator.calculateSimilarity("LM358", "LM324", registry);// Returns 0.0```## Implementation Notes- Returns 0.0 for non-MOSFET MPNs- The `9` in part number typically indicates P-channel- Symmetry: `sim(A,B) == sim(B,A)`---## Learnings & Quirks### Part Number Patterns- IRF5xx/IRF6xx: N-channel power MOSFETs- IRF95xx/IRF96xx: P-channel equivalents- The xx number often indicates Vds rating (e.g., 530 ≈ 100V)### Cross-Manufacturer Equivalence- STF = ST equivalent to IRF- Many manufacturers make "drop-in" replacements- Check Vds, Rds(on), and Id specs for true equivalence### Package Variants- TO-220: Standard through-hole- TO-220F: Isolated tab- D-PAK: Surface mount- Same electrical part in different package = HIGH_SIMILARITY

Frequently asked questions

Similarity Mosfet