ReddRadar
Agent skill
resistor
Use when working with resistor components - adding resistor patterns, parsing resistor MPNs, extracting resistance values, tolerance, or package codes from resistor part numbers.
Install this agent skill to your Project
npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/data/resistor
SKILL.md
Resistor Component Skill
Guidance for working with resistor components in the lib-electronic-components library.
Supported Manufacturers & Patterns
| Manufacturer | Handler | MPN Patterns | Example |
|---|---|---|---|
| Vishay | VishayHandler |
CRCW####..., RCG#..., WSL#... |
CRCW060310K0FKEA |
| Yageo | YageoHandler |
RC####..., RT####..., RL####... |
RC0603FR-0710KL |
| Panasonic | PanasonicHandler |
ERJ..., ERJP..., ERJG... |
ERJ-3EKF1001V |
| Bourns | BournsHandler |
CR..., CRM..., CRH... |
CR0603-FX-1001ELF |
ComponentTypes
// Base type
ComponentType.RESISTOR
// Manufacturer-specific types
ComponentType.RESISTOR_CHIP_VISHAY
ComponentType.RESISTOR_THT_VISHAY
ComponentType.RESISTOR_CHIP_YAGEO
ComponentType.RESISTOR_THT_YAGEO
ComponentType.RESISTOR_CHIP_PANASONIC
ComponentType.RESISTOR_CHIP_BOURNS
MPN Structure
Vishay CRCW Series
CRCW 0603 10K0 F K EA
│ │ │ │ │ │
│ │ │ │ │ └── Packaging (EA=Tape & Reel)
│ │ │ │ └──── Termination (K=Standard)
│ │ │ └────── Tolerance (F=1%, J=5%)
│ │ └─────────── Value (10K0 = 10kΩ)
│ └──────────────── Size (0603)
└───────────────────── Series
Yageo RC Series
RC 0603 FR -07 10K L
│ │ │ │ │ │
│ │ │ │ │ └── Packaging (L=7" Reel)
│ │ │ │ └────── Value (10K = 10kΩ)
│ │ │ └───────── TCR Code (07=±100ppm)
│ │ └───────────── Tolerance (F=1%, J=5%)
│ └────────────────── Size (0603)
└───────────────────── Series (RC=Thick Film)
Key Handler Methods
Extract Package Code
// Returns "0603" from "CRCW060310K0FKEA"
handler.extractPackageCode("CRCW060310K0FKEA");
// Returns "0805" from "RC0805JR-0710KL"
handler.extractPackageCode("RC0805JR-0710KL");
Extract Series
// Returns "CRCW" from Vishay
handler.extractSeries("CRCW060310K0FKEA");
// Returns "RC0603" from Yageo (includes size)
handler.extractSeries("RC0603FR-0710KL");
Adding New Resistor Patterns
- In the manufacturer handler's
initializePatterns():
registry.addPattern(ComponentType.RESISTOR, "^NEWPFX[0-9]{4}.*");
registry.addPattern(ComponentType.RESISTOR_CHIP_MANUFACTURER, "^NEWPFX[0-9]{4}.*");
- Add to
getSupportedTypes():
types.add(ComponentType.RESISTOR);
types.add(ComponentType.RESISTOR_CHIP_MANUFACTURER);
- Implement
matches()for direct pattern matching (faster than regex fallback)
Similarity Calculation
ResistorSimilarityCalculator compares:
- Resistance value (extracted from MPN)
- Package size (0402, 0603, 0805, etc.)
- Tolerance class (1%, 5%, etc.)
- Power rating (if determinable)
Common Package Sizes
| Code | Metric | Size (mm) |
|---|---|---|
| 0402 | 1005 | 1.0 x 0.5 |
| 0603 | 1608 | 1.6 x 0.8 |
| 0805 | 2012 | 2.0 x 1.25 |
| 1206 | 3216 | 3.2 x 1.6 |
| 2512 | 6332 | 6.3 x 3.2 |
Learnings & Quirks
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