Lib-electronic-components similarity-diode

Use when working with diode similarity calculations - comparing signal/rectifier/zener/Schottky diode MPNs, understanding equivalent groups like 1N4148/1N914, or diode-specific similarity logic.

install

source · Clone the upstream repo

git clone https://github.com/Cantara/lib-electronic-components

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/Cantara/lib-electronic-components "$T" && mkdir -p ~/.claude/skills && cp -r "$T/.claude/skills/similarity-diode" ~/.claude/skills/cantara-lib-electronic-components-similarity-diode && rm -rf "$T"

manifest: .claude/skills/similarity-diode/SKILL.md

source content

Diode Similarity Calculator Skill

Guidance for working with

DiodeSimilarityCalculator

in the lib-electronic-components library.

For metadata-driven similarity architecture, see

/similarity-metadata

SpecImportance levels (CRITICAL, HIGH, MEDIUM, LOW, OPTIONAL)
ToleranceRule types (exactMatch, percentageTolerance, minimumRequired, etc.)
SimilarityProfile contexts (DESIGN_PHASE, REPLACEMENT, COST_OPTIMIZATION, etc.)
Calculator integration patterns and gotchas

Overview

The

DiodeSimilarityCalculator

compares diodes based on:

Diode type - Signal, rectifier, zener, Schottky
Equivalent groups - Known interchangeable parts
Voltage ratings - For rectifier and zener diodes

Applicable Types

ComponentType.DIODE
// Any type starting with "DIODE_"

Returns

false

for

null

type.

Similarity Thresholds

HIGH_SIMILARITY = 0.9;   // Equivalent parts
MEDIUM_SIMILARITY = 0.7; // Same family, compatible
LOW_SIMILARITY = 0.3;    // Same type, different specs

Signal Diode Equivalents

Group	Members	Notes
1N4148/1N914	1N4148, 1N914	Classic signal diodes, equivalent

calculator.calculateSimilarity("1N4148", "1N914", registry);
// Returns 0.9 (equivalent signal diodes)

Rectifier Diode Equivalents

1N400x Series (1A Rectifiers)

Part	Voltage	Equivalent
1N4001	50V	RL201
1N4002	100V	RL202
1N4003	200V	RL203
1N4004	400V	RL204
1N4005	600V	RL205
1N4006	800V	RL206
1N4007	1000V	RL207

// Same voltage equivalents
calculator.calculateSimilarity("1N4007", "RL207", registry);
// Returns 0.9 (both 1000V rectifiers)

// Same family, different voltage
calculator.calculateSimilarity("1N4001", "1N4007", registry);
// Returns 0.9 (same family, all rectifiers)

calculator.calculateSimilarity("1N4001", "1N4004", registry);
// Returns >= 0.7 (same family)

Zener Diode Rules

Zener diodes are compared by voltage rating:

Part	Voltage
1N4728	3.3V
1N4733	5.1V
1N4742	12V
1N4744	15V

// Same voltage zener
calculator.calculateSimilarity("1N4733", "1N4733", registry);
// Returns 0.9

// Different voltage zeners
calculator.calculateSimilarity("1N4733", "1N4742", registry);
// Returns 0.3 (5.1V vs 12V - not interchangeable)

Schottky Diode Equivalents

Group	Members
BAT54	BAT54, BAT54S (series dual)

calculator.calculateSimilarity("BAT54", "BAT54S", registry);
// Returns 0.9 (same Schottky, different configuration)

Test Examples

// Equivalent signal diodes
calculator.calculateSimilarity("1N4148", "1N914", registry);
// Returns 0.9

// Same rectifier diode
calculator.calculateSimilarity("1N4007", "1N4007", registry);
// Returns 0.9

// Cross-manufacturer rectifier
calculator.calculateSimilarity("1N4007", "RL207", registry);
// Returns 0.9

// Same zener voltage
calculator.calculateSimilarity("1N4733", "1N4733", registry);
// Returns 0.9

// Different zener voltage
calculator.calculateSimilarity("1N4733", "1N4742", registry);
// Returns 0.3

// Non-diode parts
calculator.calculateSimilarity("LM358", "LM324", registry);
// Returns 0.0

Learnings & Quirks

1N400x Series Pattern

1N = JEDEC prefix
400x = 1A rectifier series
x = voltage code (1=50V through 7=1000V)

Zener Voltage Codes

1N47xx series: xx roughly indicates voltage
Need lookup table for exact voltage

Schottky Configurations

BAT54 = Single diode
BAT54S = Series dual (2 diodes in series)
BAT54A = Common anode
BAT54C = Common cathode
These are same diode, different configurations

Signal vs Rectifier

Signal diodes (1N4148): Fast switching, low current
Rectifier diodes (1N4007): Higher current, slower