Agent skill

cosmo

Cosmo Electronics MPN encoding patterns, suffix decoding, and handler guidance. Use when working with Cosmo optocouplers or CosmoHandler.

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npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/data/cosmo

SKILL.md

Cosmo Electronics Manufacturer Skill

Overview

Cosmo Electronics is a Taiwanese manufacturer specializing in optocouplers and photo interrupters. Their product lines use the "KP" prefix family.

MPN Structure

Cosmo MPNs follow these general patterns:

KP Series (Phototransistor Optocouplers)

KP[SERIES][VARIANT][-SUFFIX]
   |         |         |
   |         |         +-- Optional: -1=DIP-4, C/S=SMD
   |         +-- Variant letter (optional)
   +-- 4-digit series (e.g., 1010, 2010, 4010)

KPC Series (High Isolation)

KPC[SERIES][CTR-GRADE][PKG-IND][-SUFFIX]
    |         |          |        |
    |         |          |        +-- Optional suffix
    |         |          +-- Package indicator (S/G=SMD, T=SOP)
    |         +-- CTR Grade: A/B/C/D
    +-- 3-digit series (e.g., 817, 357)

Example Decoding

KP1010-1
|  |   |
|  |   +-- -1 = DIP-4 package
|  +-- 1010 = Single channel phototransistor
+-- KP = Phototransistor optocoupler series

KPC817C-1
|  |  | |
|  |  | +-- -1 = DIP-4 package
|  |  +-- C = CTR grade (200-400%)
|  +-- 817 = General purpose high isolation
+-- KPC = High isolation optocoupler

KPH121S
|  |  |
|  |  +-- S = SMD package
|  +-- 121 = High speed single channel
+-- KPH = High speed optocoupler

Product Lines

KP Series - Phototransistor Optocouplers

Series Description Channels
KP1010 Single channel phototransistor 1
KP1020 Single channel (variant) 1
KP2010 Dual channel phototransistor 2
KP4010 Quad channel phototransistor 4

KPC Series - High Isolation Optocouplers

Series Description Output
KPC817 General purpose, high isolation Phototransistor
KPC357 Darlington output Darlington

Note: KPC817 is functionally equivalent to Sharp PC817.

KPH Series - High Speed Optocouplers

Series Description Channels
KPH121 High speed single channel 1
KPH141 High speed dual channel 2

KPS Series - SMD Optocouplers

Series Description Package
KPS1010 SMD version of KP1010 SMD
KPS2010 SMD version of KP2010 SMD

KPTR Series - Reflective Sensors

Series Description Type
KPTR1200 Reflective photo interrupter Sensor
KPTR1201 Reflective photo interrupter Sensor

CTR (Current Transfer Ratio) Grades

For KPC817 series:

Grade CTR Range Application
A 80-160% Highest gain
B 130-260% High gain
C 200-400% Medium gain
D 300-600% Wide range

Package Codes

Suffix-Based Packages

Suffix Package Notes
-1 DIP-4 Standard 4-pin DIP
C SMD Compact SMD variant
S SMD Surface mount
G SMD SMD variant
T SOP Thin SOP variant
-F Lead-free RoHS compliant
-TR Tape and reel Packaging option

Default Packages by Series

Prefix Default Package
KP DIP-4
KPC DIP-4
KPH DIP
KPS SMD (always)
KPTR SMD (always)

Channel Count by Series

Series Pattern Channels
1010, 1020, 817, 357, 121, 1200, 1201 1
2010, 141 2
4010 4

Handler Implementation Notes

Pattern Matching

java
// KP series: 4-digit series number
"^KP\\d{4}.*"        // KP1010, KP2010, KP4010

// KPC series: 3-digit series number
"^KPC\\d{3}.*"       // KPC817, KPC357

// KPH series: 3-digit series number
"^KPH\\d{3}.*"       // KPH121, KPH141

// KPS series: 4-digit series number
"^KPS\\d{4}.*"       // KPS1010, KPS2010

// KPTR series: 4-digit series number
"^KPTR\\d{4}.*"      // KPTR1200, KPTR1201

Series Extraction

java
// Returns prefix + series number
"KP1010-1" -> "KP1010"
"KPC817C" -> "KPC817"
"KPH121S" -> "KPH121"
"KPS2010C" -> "KPS2010"
"KPTR1200" -> "KPTR1200"

Package Extraction Logic

java
// Check for -1 suffix first
"KPC817C-1" -> "DIP-4"

// KPS series is always SMD
"KPS1010" -> "SMD"

// KPTR series is always SMD
"KPTR1200" -> "SMD"

// Check package indicators for KPC
"KPC817CS" -> "SMD"  // S = SMD
"KPC817CT" -> "SOP"  // T = SOP thin

// Check variant letter for KP/KPH
"KP1010C" -> "SMD"
"KPH121S" -> "SMD"

// Default packages
"KP1010" -> "DIP-4"
"KPC817C" -> "DIP-4"
"KPH121" -> "DIP"

CTR Grade Extraction

java
// KPC series: letter after 3-digit number
"KPC817A" -> "A"
"KPC817B-1" -> "B"
"KPC817CS" -> "C"  // C is CTR, S is package

Component Types

The handler maps to these ComponentTypes:

Prefix ComponentTypes
KP, KPC, KPH, KPS IC, OPTOCOUPLER_TOSHIBA
KPTR IC, SENSOR

Note: Uses OPTOCOUPLER_TOSHIBA as the generic optocoupler type (historical naming).

Cross-Reference / Equivalents

Cosmo Equivalent Notes
KPC817 Sharp PC817 Pin-compatible
KPC817 Toshiba TLP817 Pin-compatible
KPC357 Sharp PC357 Darlington output

Related Files

  • Handler: manufacturers/CosmoHandler.java
  • Component types: ComponentType.IC, ComponentType.OPTOCOUPLER_TOSHIBA, ComponentType.SENSOR

Learnings & Edge Cases

  • CTR grade vs package indicator: For KPC series, the first letter after digits is CTR grade (A-D), subsequent letters may be package indicators (S/G/T). Order matters.
  • KPS always SMD: The KPS prefix indicates SMD package regardless of any suffix.
  • KPTR is a sensor: KPTR series are reflective sensors, not optocouplers. They map to SENSOR type.
  • Channel count from series: 1010/1020 = single, 2010 = dual, 4010 = quad. The first digit often indicates channel count.
  • Replacement compatibility: Same series with different packages (DIP vs SMD) are not direct replacements due to footprint differences.

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