Agent skill

onsemi

ON Semiconductor (onsemi) MPN encoding patterns, package codes, and handler guidance. Use when working with onsemi MOSFETs, diodes, transistors, voltage regulators, or OnSemiHandler.

View SKILL.md on GitHub Repository
Stars 163
Forks 31

Install this agent skill to your Project

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

SKILL.md

ON Semiconductor (onsemi) Manufacturer Skill

Company Overview

ON Semiconductor (onsemi) is a major semiconductor manufacturer that acquired Fairchild Semiconductor in 2016. The company inherited multiple part numbering conventions from various acquisitions including Fairchild, Motorola Semiconductor Products Sector, and others.

MPN Structure by Product Family

MOSFETs - NTD/NTB/NTS Series (ON Semiconductor Native)

NT[PKG][VOLTAGE][CURRENT/RDS][CHANNEL][SUFFIX]
 |   |      |         |         |        |
 |   |      |         |         |        +-- L=Logic level, blank=standard
 |   |      |         |         +-- N=N-channel (may be embedded)
 |   |      |         +-- Current capability or RDS identifier
 |   |      +-- Voltage class
 |   +-- Package: D=DPAK, B=D2PAK, S=SO-8, R=SOT-23
 +-- NT = ON Semiconductor power MOSFET

Examples:

  • NTD20N06L = N-channel, DPAK, 60V, 20A, Logic Level
  • NTD2955 = P-channel equivalent of 2N2955 in DPAK
  • NTD4809N = N-channel, DPAK, 30V, 88A
  • NTB60N06 = N-channel, D2PAK, 60V, 60A

MOSFETs - FQP/FQD/FQB Series (Legacy Fairchild)

FQ[PKG][CURRENT][CHANNEL][VOLTAGE][SUFFIX]
 |   |     |        |        |       |
 |   |     |        |        |       +-- L=Logic level, blank=standard
 |   |     |        |        +-- Voltage / 10 (e.g., 06=60V, 20=200V)
 |   |     |        +-- N=N-channel, P=P-channel
 |   |     +-- Current rating (A)
 |   +-- Package: P=TO-220, D=DPAK, B=D2PAK, A=TO-3P
 +-- FQ = Fairchild QFET series

Examples:

  • FQP50N06L = TO-220, 50A, N-channel, 60V, Logic Level
  • FQP27P06 = TO-220, 27A, P-channel, 60V
  • FQP4N20L = TO-220, 4A, N-channel, 200V, Logic Level
  • FQD13N10 = DPAK, 13A, N-channel, 100V

MOSFETs - FDP/FDB/FDD Series (Legacy Fairchild PowerTrench)

FD[PKG][CURRENT/CODE][RDS][VOLTAGE][SUFFIX]
 |   |        |        |      |       |
 |   |        |        |      |       +-- Technology suffix (optional)
 |   |        |        |      +-- Voltage class
 |   |        |        +-- RDS identifier (mOhm related)
 |   |        +-- Device code or current
 |   +-- Package: P=TO-220, B=D2PAK, D=DPAK
 +-- FD = Fairchild PowerTrench MOSFET

Examples:

  • FDP3680 = TO-220, PowerTrench, 100V
  • FDD3680 = DPAK, PowerTrench, 100V
  • FDB3632 = D2PAK, 100V, 73A

Transistors - 2N Series (JEDEC Standard)

2N[SEQUENCE][SUFFIX]
 |    |        |
 |    |        +-- A/B/C = grade improvement
 |    +-- JEDEC registration number (no encoded meaning)
 +-- 2N = JEDEC transistor prefix

Examples:

  • 2N2222A = NPN general purpose
  • 2N3904 = NPN general purpose
  • 2N3906 = PNP general purpose
  • 2N7000 = N-channel enhancement MOSFET
  • 2N7002 = N-channel SMD MOSFET

Transistors - MMBT Series (Surface Mount)

MMBT[BASE][SUFFIX]
  |    |      |
  |    |      +-- Grade suffix (L=low, T1=tape & reel)
  |    +-- Equivalent 2N or base number
  +-- MMBT = Motorola Miniature Bipolar Transistor (SOT-23)

Examples:

  • MMBT2222A = SMD equivalent of 2N2222A (SOT-23)
  • MMBT3904 = SMD equivalent of 2N3904 (SOT-23)
  • MMBT3906 = SMD equivalent of 2N3906 (SOT-23)
  • MMBT4401 = NPN 40V transistor (SOT-23)
  • MMBT4403 = PNP 40V transistor (SOT-23)

Transistors - MPS/MPSA Series

MPS[A][CODE]
 |   |   |
 |   |   +-- Device code
 |   +-- A = variant designation
 +-- MPS = Motorola Plastic Small (signal transistor)

Examples:

  • MPSA42 = NPN high voltage (300V)
  • MPSA92 = PNP high voltage (300V)
  • MPS2222A = Plastic equivalent of 2N2222A

Voltage Regulators - MC78xx/MC79xx Series

MC78[VOLTAGE][GRADE][PACKAGE]
  |     |       |       |
  |     |       |       +-- Package suffix (CT=TO-220, CD=DPAK, etc.)
  |     |       +-- Grade: blank=std, A/B/C=improved
  |     +-- Output voltage (05=5V, 12=12V, 15=15V, etc.)
  +-- MC78 = Motorola positive regulator / MC79 = negative regulator

Examples:

  • MC7805CT = +5V, 1A, TO-220
  • MC7812ACT = +12V, 1A, improved, TO-220
  • MC78L05ACP = +5V, 100mA, plastic
  • MC7905CT = -5V, 1A, TO-220
  • MC79M12CT = -12V, 500mA, TO-220

Voltage Regulators - MC33xx Series (Switching)

MC33[CODE][VARIANT][PACKAGE]
  |    |      |        |
  |    |      |        +-- Package designator
  |    |      +-- Variant/feature code
  |    +-- Device code
  +-- MC33 = Motorola switching regulator family

Examples:

  • MC33063AD = DC-DC converter, SOIC
  • MC34063A = 1.5A switching regulator
  • MC33167T = 5A switching regulator, TO-220

Voltage Regulators - NCP Series (Newer ON Semi)

NCP[CODE][VARIANT][PACKAGE]
  |   |      |        |
  |   |      |        +-- Package designator
  |   |      +-- Feature/variant code
  |   +-- Device family code
  +-- NCP = ON Semiconductor power IC

Examples:

  • NCP1117ST33T3G = 3.3V LDO, SOT-223, tape & reel
  • NCP1117DT33G = 3.3V LDO, DPAK
  • NCP5500 = Ultra-low Iq LDO

Diodes - RL Series (Standard Rectifiers)

RL20[VOLTAGE CODE]
  |        |
  |        +-- 1=50V, 2=100V, 3=200V, 4=400V, 5=600V, 6=800V, 7=1000V
  +-- RL20 = 2A standard recovery rectifier series

Examples:

  • RL201 = 50V, 2A rectifier (DO-41)
  • RL204 = 400V, 2A rectifier (DO-41)
  • RL207 = 1000V, 2A rectifier (DO-41)

Diodes - MUR Series (Ultra-Fast Recovery)

MUR[CURRENT][VOLTAGE]
  |     |       |
  |     |       +-- Voltage rating / 10 (e.g., 20=200V)
  |     +-- Current rating in Amps
  +-- MUR = Motorola Ultra-fast Recovery

Examples:

  • MUR120 = 1A, 200V ultra-fast
  • MUR460 = 4A, 600V ultra-fast
  • MUR1520 = 15A, 200V ultra-fast

Diodes - MBR/MBRS Series (Schottky)

MBR[S][CURRENT][VOLTAGE]
  |  |     |       |
  |  |     |       +-- Voltage rating / 10
  |  |     +-- Current rating
  |  +-- S = Surface mount version
  +-- MBR = Motorola Barrier Rectifier (Schottky)

Examples:

  • MBR1045 = 10A, 45V Schottky (TO-220)
  • MBR2045CT = 20A, 45V dual Schottky (TO-220)
  • MBRS340 = 3A, 40V SMD Schottky (SMC)

Diodes - 1N47xx/1N52xx Series (Zener)

1N[SERIES][CODE][SUFFIX]
 |    |      |      |
 |    |      |      +-- Grade suffix (A, B, C, etc.)
 |    |      +-- Voltage code within series
 |    +-- 47=1W Zener, 52=0.5W Zener
 +-- 1N = JEDEC diode prefix

Examples:

  • 1N4733A = 5.1V Zener, 1W
  • 1N4742A = 12V Zener, 1W
  • 1N5231B = 5.1V Zener, 0.5W
  • 1N5242B = 12V Zener, 0.5W

Op-Amps - MC Series

MC[BASE][VARIANT][PACKAGE]
 |   |      |        |
 |   |      |        +-- Package code
 |   |      +-- Grade variant
 |   +-- Device base number
 +-- MC = Motorola integrated circuit

Examples:

  • MC1458 = Dual op-amp (equivalent to LM1458)
  • MC324 = Quad op-amp (equivalent to LM324)
  • MC741 = Single op-amp (equivalent to LM741)

Package Codes

Through-Hole Packages

Code Package Current Notes
CT TO-220 1A+ Standard power
T TO-220 1A+ Alternate code
ACP TO-92 100mA Plastic small
P DIP - Dual in-line
N DIP - Alternate for DIP

Surface Mount Packages

Code Package Notes
D SOIC Standard SOIC-8/14/16
DT DPAK (TO-252) Power SMD
BD D2PAK (TO-263) High power SMD
DW SOIC-Wide Wide body
PW TSSOP Thin shrink SOP
DGK MSOP Mini SOP
DBV SOT-23 Small outline
T3G SOT-23 Tape SOT-23 with T&R

Diode Packages

Code Package Notes
RL DO-41 Standard axial
G DO-35 Small signal
T TO-220 Power diode
FP TO-220F Fully isolated
SMB DO-214AA Surface mount
SMC DO-214AB Larger SMD

Temperature Grades & Prefixes

Automotive Prefix (NCV)

NCV[BASE PART NUMBER]
  |
  +-- Automotive grade, AEC-Q100/Q101 qualified
      Temperature: -40C to +125C
      PPAP capable

Examples:

  • NCV7805 = Automotive version of MC7805
  • NCV8402 = Automotive power MOSFET

Temperature Suffixes

Suffix Range Application
(none) 0C to +70C Commercial
I -40C to +85C Industrial
E -40C to +125C Extended

Grade Suffixes

Suffix Meaning
A Improved tolerance/specs
B Further improved
C Premium grade
L Logic level (MOSFETs)
G Green/RoHS compliant
T1 Tape & reel (SOT-23)
T3G Tape & reel + Green

Common Series Reference

Popular MOSFETs

Part Number Type Vds Id Package
FQP50N06L N-ch Logic 60V 50A TO-220
FQP27P06 P-ch 60V 27A TO-220
NTD20N06L N-ch Logic 60V 20A DPAK
NTD2955 P-ch 60V 12A DPAK
2N7000 N-ch 60V 200mA TO-92
2N7002 N-ch 60V 115mA SOT-23
FDB3632 N-ch 100V 73A D2PAK

Popular Transistors

Part Number Type Vceo Ic Package
2N2222A NPN 40V 600mA TO-18/TO-92
2N3904 NPN 40V 200mA TO-92
2N3906 PNP 40V 200mA TO-92
MMBT2222A NPN 40V 600mA SOT-23
MMBT3904 NPN 40V 200mA SOT-23
MMBT3906 PNP 40V 200mA SOT-23
MPSA42 NPN 300V 500mA TO-92

Popular Regulators

Part Number Output Current Package
MC7805CT +5V 1A TO-220
MC7812CT +12V 1A TO-220
MC78L05ACP +5V 100mA TO-92
MC7905CT -5V 1A TO-220
NCP1117ST33T3G +3.3V 1A SOT-223
MC33063AD Variable 1.5A SOIC-8

Popular Diodes

Part Number Type Vrrm If Package
RL207 Rectifier 1000V 2A DO-41
MUR460 Ultra-fast 600V 4A TO-220
MBR1045 Schottky 45V 10A TO-220
MBRS340 Schottky 40V 3A SMC
1N4733A Zener 5.1V 1W DO-41
1N4742A Zener 12V 1W DO-41

Handler Implementation Notes

Issues Found in Current OnSemiHandler

  1. HashSet usage (line 39): Uses mutable HashSet instead of Set.of() or EnumSet for immutability
  2. Limited MOSFET patterns: No patterns for NTD, FQP, FDP series MOSFETs
  3. Limited transistor patterns: No patterns for 2N, MMBT, MPSA series transistors
  4. Missing NCP regulator patterns: Only covers MC78xx/MC79xx, missing NCP series
  5. Package extraction logic: Only handles diode packages, missing MOSFET/transistor package codes
  6. Series extraction incomplete: Does not extract series for MOSFETs or transistors

Recommended Pattern Additions

java
// MOSFETs - ON Semi native
registry.addPattern(ComponentType.MOSFET, "^NT[DBSR][0-9]+.*");
registry.addPattern(ComponentType.MOSFET_ONSEMI, "^NT[DBSR][0-9]+.*");

// MOSFETs - Fairchild legacy
registry.addPattern(ComponentType.MOSFET, "^FQ[PDBA][0-9]+.*");
registry.addPattern(ComponentType.MOSFET_ONSEMI, "^FQ[PDBA][0-9]+.*");
registry.addPattern(ComponentType.MOSFET, "^FD[PDB][0-9]+.*");
registry.addPattern(ComponentType.MOSFET_ONSEMI, "^FD[PDB][0-9]+.*");

// Small signal MOSFETs
registry.addPattern(ComponentType.MOSFET, "^2N7[0-9]{3}.*");
registry.addPattern(ComponentType.MOSFET_ONSEMI, "^2N7[0-9]{3}.*");
registry.addPattern(ComponentType.MOSFET, "^BSS[0-9]+.*");
registry.addPattern(ComponentType.MOSFET_ONSEMI, "^BSS[0-9]+.*");

// Transistors
registry.addPattern(ComponentType.TRANSISTOR, "^2N[0-9]{4}.*");
registry.addPattern(ComponentType.TRANSISTOR, "^MMBT[0-9]+.*");
registry.addPattern(ComponentType.TRANSISTOR, "^MPS[A]?[0-9]+.*");
registry.addPattern(ComponentType.TRANSISTOR, "^BC[0-9]{3}.*");

// NCP voltage regulators
registry.addPattern(ComponentType.VOLTAGE_REGULATOR, "^NCP[0-9]+.*");
registry.addPattern(ComponentType.VOLTAGE_REGULATOR_LINEAR_ON, "^NCP[0-9]+.*");

Package Extraction Improvements

java
// MOSFET package extraction
if (upperMpn.startsWith("FQP") || upperMpn.endsWith("CT")) return "TO-220";
if (upperMpn.startsWith("FQD") || upperMpn.matches(".*DT$")) return "DPAK";
if (upperMpn.startsWith("FQB") || upperMpn.matches(".*BD$")) return "D2PAK";
if (upperMpn.startsWith("NTD")) return "DPAK";
if (upperMpn.startsWith("NTB")) return "D2PAK";

// Transistor package extraction
if (upperMpn.startsWith("MMBT") || upperMpn.matches(".*T1$")) return "SOT-23";
if (upperMpn.startsWith("2N") && !upperMpn.startsWith("2N7")) return "TO-92";
if (upperMpn.startsWith("MPS")) return "TO-92";

Series Extraction Improvements

java
// MOSFET series
if (mpn.matches("(?i)^NTD.*")) return "NTD";
if (mpn.matches("(?i)^NTB.*")) return "NTB";
if (mpn.matches("(?i)^FQP.*")) return "FQP";
if (mpn.matches("(?i)^FQD.*")) return "FQD";
if (mpn.matches("(?i)^FDP.*")) return "FDP";
if (mpn.matches("(?i)^FDD.*")) return "FDD";
if (mpn.matches("(?i)^FDB.*")) return "FDB";

// Transistor series
if (mpn.matches("(?i)^MMBT.*")) return "MMBT";
if (mpn.matches("(?i)^2N[0-9]+.*")) return "2N";
if (mpn.matches("(?i)^MPS[A]?.*")) return "MPS";

// Regulator series
if (mpn.matches("(?i)^NCP[0-9]+.*")) return "NCP";

Related Files

  • Handler: manufacturers/OnSemiHandler.java
  • Component types: MOSFET_ONSEMI, IGBT_ONSEMI, VOLTAGE_REGULATOR_LINEAR_ON, VOLTAGE_REGULATOR_SWITCHING_ON, LED_DRIVER_ONSEMI, MOTOR_DRIVER_ONSEMI, OPAMP_ON, DIODE_ON

Learnings & Edge Cases

  • Fairchild acquisition: ON Semiconductor acquired Fairchild in 2016, inheriting FQP/FDP/FDD nomenclature
  • Motorola heritage: MC78xx, MC79xx, MUR, MBR series come from Motorola semiconductor division
  • JEDEC standards: 2N and 1N prefixes follow JEDEC numbering (no encoded specs in number)
  • Logic level: "L" suffix indicates logic-level gate threshold (~2.5V Vgs max)
  • Automotive grade: NCV prefix indicates AEC-Q100/Q101 qualified automotive parts
  • Cross-reference needed: Many parts have equivalents across ON Semi, Fairchild, and other sources
  • Package suffix variations: CT vs T both mean TO-220; DT means DPAK

Recommended Agent Skills

Expand your agent's capabilities with these related and highly-rated skills.

majiayu000/claude-skill-registry

agent-ops-spec

Manage specification documents in .agent/specs/. Use when user provides requirements, acceptance criteria, or feature descriptions that need to be tracked and validated against implementation.

163 31
Explore
majiayu000/claude-skill-registry

agent-ops-state

Maintain .agent state files. Use at session start, after meaningful steps, and before concluding: read/update constitution/memory/focus/issues/baseline consistently.

163 31
Explore
majiayu000/claude-skill-registry

agent-ops-spec

Manage specification documents in .agent/specs/. Use when user provides requirements, acceptance criteria, or feature descriptions that need to be tracked and validated against implementation.

163 31
Explore
majiayu000/claude-skill-registry

agent-ops-testing

Test strategy, execution, and coverage analysis. Use when designing tests, running test suites, or analyzing test results beyond baseline checks.

163 31
Explore
majiayu000/claude-skill-registry

agent-ops-testing

Test strategy, execution, and coverage analysis. Use when designing tests, running test suites, or analyzing test results beyond baseline checks.

163 31
Explore
majiayu000/claude-skill-registry

agent-ops-state

Maintain .agent state files. Use at session start, after meaningful steps, and before concluding: read/update constitution/memory/focus/issues/baseline consistently.

163 31
Explore

Didn't find tool you were looking for?

Be as detailed as possible for better results