Panjit

Panjit International Manufacturer Skill

Overview

Panjit International is a Taiwanese semiconductor manufacturer producing discrete semiconductors including diodes, transistors, and MOSFETs. They are known for industry-standard compatible parts as well as their proprietary PJ MOSFET series.

MPN Structure

Panjit MPNs follow industry-standard patterns with package suffixes:

Standard Diode Pattern

[SERIES][RATING][SUFFIX]
   |       |       |
   |       |       +-- Package code
   |       +-- Voltage/specification
   +-- Series prefix (1N, SS, SK, BAV, etc.)

PJ MOSFET Pattern

PJ[SERIES][SUFFIX]
   |        |
   |        +-- Package code
   +-- 4-digit series number

Example Decoding

1N4007G
|  |  ||
|  |  |+-- G = DO-41 package
|  |  +-- 7 = 1000V rating
|  +-- 400 = Rectifier series
+-- 1N = Standard diode prefix

MMBT3904LT
|   |  | |
|   |  | +-- LT = SOT-23 package
|   |  +-- NPN transistor number
|   +-- 3904 series
+-- MMBT = SMD transistor prefix

PJ2308N
| |  ||
| |  |+-- N = TO-92 package
| |  +-- Series number
| +-- 23 series
+-- PJ = Panjit proprietary MOSFET

Product Lines

Standard Rectifier Diodes (1N4xxx)

Signal Diodes

Power Rectifiers (1N5xxx)

Fast Recovery Diodes

Schottky Diodes (SS Series)

Schottky Diodes (SK Series)

Schottky Barrier (SB Series)

Schottky Barrier (MBR Series)

Signal Diodes (BAV/BAS/BAT Series)

Zener Diodes (BZX Series)

TVS Diodes

SMD Transistors (MMBT Series)

MPSA Series Transistors

2N Series Transistors

BC Series Transistors

PN Series Transistors

MOSFETs (BSS Series)

MOSFETs (PJ Series - Panjit Proprietary)

MOSFETs (SI/AO Series)

Package Codes

Comprehensive Package Suffix Table

Default Packages by Series

Handler Implementation Notes

Pattern Matching

// Standard rectifiers
"^1N4[0-9]{3}.*"        // 1N4001-1N4007
"^1N5[0-9]{3}.*"        // 1N5xxx series

// Signal diodes
"^1N4148.*"
"^1N914.*"

// Fast recovery
"^ES[1-3][A-Z].*"
"^RS[1-3][A-Z].*"
"^US[1-3][A-Z].*"
"^UF[0-9]{4}.*"

// Schottky
"^SS[1-3][0-9].*"
"^SK[3-5][0-9].*"
"^SB[1-5][0-9]{2}.*"
"^MBR[0-9]{3,4}.*"

// Signal diodes
"^BAV[0-9]{2}.*"
"^BAS[0-9]{2}.*"
"^BAT[0-9]{2}.*"

// Zener
"^BZX[0-9]{2}.*"

// TVS
"^SMB[AJ][0-9].*"
"^SMA[J][0-9].*"

// Transistors (exclude 2N7002)
"^MMBT[0-9]{3,4}.*"
"^MPSA[0-9]{2}.*"
"^2N[0-9]{4}.*"         // But NOT 2N7002
"^BC[0-9]{3}.*"
"^PN[0-9]{4}.*"

// MOSFETs
"^2N7002.*"
"^BSS[0-9]{2,3}.*"
"^PJ[0-9]{4}.*"
"^SI[0-9]{4}.*"
"^AO[0-9]{4}.*"

Series Extraction

// Signal diodes (specific before generic)
"1N4148W" -> "1N4148"
"1N914" -> "1N914"

// Rectifiers
"1N4007G" -> "1N4000"
"1N5408" -> "1N5400"
"1N5819" -> "1N5800"  // Schottky series

// Fast recovery
"ES1J" -> "ES"
"RS1M" -> "RS"
"US1M" -> "US"
"UF4007" -> "UF"

// Schottky
"SS14" -> "SS"
"SK34" -> "SK"
"SB160" -> "SB"
"MBR1045" -> "MBR"

// Signal
"BAV99" -> "BAV"
"BAS16" -> "BAS"
"BAT54S" -> "BAT"

// Zener
"BZX84C5V1" -> "BZX"

// TVS
"SMBJ15A" -> "SMBJ"
"SMAJ24CA" -> "SMAJ"

// Transistors
"MMBT3904" -> "MMBT"
"MPSA42" -> "MPSA"
"2N3904" -> "2N"
"BC547B" -> "BC"
"PN2222A" -> "PN"

// MOSFETs
"BSS138" -> "BSS"
"PJ2308" -> "PJ"
"SI2301" -> "SI"
"AO3400" -> "AO"

Replacement Logic

// 1N400x: higher voltage can replace lower
"1N4007" can replace "1N4001" through "1N4006"

// 1N540x: higher voltage can replace lower
"1N5408" can replace "1N5400" through "1N5407"

// SS series: higher current can replace lower
"SS34" can replace "SS14" (same voltage, higher current)

// Signal diode equivalents
"1N4148" == "1N914"

// MMBT equivalent to 2N
"MMBT3904" == "2N3904" (different package)

// Transistor base number match
"MMBT2222" base = "2222"
"2N2222" base = "2222"
"PN2222" base = "2222"
// All three are equivalent electrically

Component Types

Related Files

• Handler: manufacturers/PanjitHandler.java
• Component types: ComponentType.DIODE, ComponentType.TRANSISTOR, ComponentType.MOSFET

Learnings & Edge Cases

• 2N7002 is MOSFET: The 2N prefix usually indicates transistors, but 2N7002 is specifically an N-channel MOSFET. Handler explicitly excludes it from TRANSISTOR type.
• PJ series proprietary: PJ series MOSFETs are Panjit's proprietary line. Package code typically follows 4-digit series number.
• 1N4148 vs 1N914: These are equivalent signal diodes. Handler returns true for isOfficialReplacement().
• 1N5817-1N5819 are Schottky: Unlike 1N5400-1N5408 which are standard rectifiers, 1N58xx in this range are Schottky diodes with lower forward voltage.
• Package suffix order matters: Check longer suffixes (WS, GP, FL, NL, TP, LT, WT) before shorter (W, G, F, N, T, L). Otherwise "WS" matches "S" first.
• MMBT base extraction: Extract base number for equivalence: MMBT2222A -> "2222", 2N2222A -> "2222". Both are electrically equivalent.
• SS/SK current encoding: First digit is current (1-5A), second is voltage code. SS14 = 1A/40V.
• BAT54 variants: BAT54S = series pair, BAT54C = common cathode. Different pinouts, not interchangeable.