elna

name	elna
description	Elna Company MPN encoding patterns, suffix decoding, and handler guidance. Use when working with Elna audio-grade aluminum electrolytic capacitors and supercapacitors.

Elna Company Manufacturer Skill

MPN Structure

Elna MPNs follow this general structure for capacitors:

[SERIES]-[VOLTAGE]V[CAP_CODE][TOL][PACKAGE]#[SUFFIX]
   |         |        |       |      |        |
   |         |        |       |      |        +-- Optional suffix (P, etc.)
   |         |        |       |      +-- Package code (H3, F5, etc.)
   |         |        |       +-- Tolerance (M=20%)
   |         |        +-- Capacitance code (101=100uF or R notation)
   |         +-- Voltage rating
   +-- Series prefix (RFS, ROA, RE3, etc.)

Example Decoding

RFS-25V101MH3#P
|   | |  | | |
|   | |  | | +-- P suffix (packaging option)
|   | |  | +-- H3 = 5x11mm package
|   | |  +-- M = +/-20% tolerance
|   | +-- 101 = 100uF (10 x 10^1)
|   +-- 25V
+-- RFS = Silmic II (premium audio grade)

ROA-50V4R7MF3#
|   | |  | |
|   | |  | +-- F3 = 5x7mm package
|   | |  +-- M = +/-20% tolerance
|   | +-- 4R7 = 4.7uF (R notation)
|   +-- 50V
+-- ROA = TONEREX Type A (audio grade)

DB-5R5D105T
|  | | |  |
|  | | |  +-- T = Radial THT package
|  | | +-- 105 = 1F (10 x 10^5 = 1,000,000uF = 1F)
|  | +-- D suffix (EDLC type)
|  +-- 5R5 = 5.5V (R notation)
+-- DB = Dynacap Standard (supercapacitor/EDLC)

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Series Reference

Audio Grade Series

Series	Name	Description
RFS	Silmic II	Premium audio-grade, silk fiber separator
ROA	TONEREX Type A	High-quality audio capacitor
ROB	TONEREX Type B	High-quality audio capacitor
CE-BP	CE-BP Audio Crossover	Bi-polar for speaker crossovers

Standard Aluminum Electrolytic

Series	Name	Description
RE3	RE3 Standard	General purpose aluminum electrolytic
RJ3	RJ3 Standard	Standard aluminum electrolytic
RJH	RJH High Temp	High temperature (105C)

Specialized Series

Series	Name	Description
RBD	RBD Bi-Polar	Non-polar electrolytic
RBI	RBI Bi-Polar	Non-polar electrolytic
RSE	RSE Super Low ESR	Ultra-low ESR
RVD	RVD Low Leakage	Low leakage current
RVE	RVE Low Leakage	Low leakage current

Dynacap (EDLC/Supercapacitors)

Series	Name	Description
DB	Dynacap Standard	Standard EDLC
DX	Dynacap Low Profile	Low profile EDLC
DZ	Dynacap Ultra-Low Profile	Ultra-low profile EDLC

Legacy/STARGET Series

Series	Name	Description
LAO	STARGET Audio	Legacy audio series
LAS	STARGET Standard	Legacy standard series

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Capacitance Codes

EIA 3-Digit Code

Code	Value	Calculation
100	10uF	10 x 10^0
101	100uF	10 x 10^1
221	220uF	22 x 10^1
471	470uF	47 x 10^1
102	1000uF	10 x 10^2

R Notation (decimal placement)

Code	Value
1R0	1.0uF
2R2	2.2uF
4R7	4.7uF
10R	10uF
R47	0.47uF

Dynacap (high values)

Code	Value
105	1F (10 x 10^5 uF)
225	2.2F
475	4.7F
106	10F

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Package Codes

Dimension Codes (R-series)

First letter indicates diameter range, digit indicates height:

Code	Dimensions	Notes
H3	5x11mm	Small radial
H5	6.3x11mm	Standard radial
H7	8x11.5mm	Medium radial
F3	5x7mm	Low profile
F5	6.3x7mm	Low profile
L5	10x12.5mm	Large radial
L7	10x16mm	Large radial tall
M5	12.5x15mm	Extra large
M8	12.5x20mm	Extra large tall
P5	16x25mm	Power
P8	16x31.5mm	Power tall
Q5	18x25mm	High power
R5	22x25mm	Very high power

Dynacap Package Suffixes

Suffix	Package Type
T	Radial THT
V	Vertical SMD
H	Horizontal SMD
C	Coin Cell

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Handler Implementation Notes

Pattern Recognition

// Silmic II series
"^RFS-[0-9]+V[0-9A-Z]+.*"

// TONEREX series
"^RO[AB]-[0-9]+V[0-9A-Z]+.*"

// Standard R-series (RE3, RJ3, RJH, RBD, RBI, RSE, RVD, RVE)
"^R[A-Z]{2}-[0-9]+V.*"

// Dynacap series
"^D[BXZ]-[0-9]+R[0-9]+[A-Z][0-9]+.*"  // With R voltage notation
"^D[BXZ][0-9]+.*"                      // Alternative format

// Legacy STARGET series
"^LA[OS][0-9]+.*"

// CE-BP bi-polar
"^CE-BP.*"

Voltage Extraction

// R-series: extract digits between hyphen and V
// RFS-25V101MH3#P -> 25
int dashIdx = mpn.indexOf('-');
String afterDash = mpn.substring(dashIdx + 1);
int vIdx = afterDash.indexOf('V');
String voltage = afterDash.substring(0, vIdx);  // "25"

// Dynacap: R notation for voltage
// DB-5R5D105T -> 5.5V (5R5)

Capacitance Extraction

// After V, before M (tolerance)
// RFS-25V101MH3#P -> 101 (100uF)
// ROA-50V4R7MF3# -> 4R7 (4.7uF)
int vIdx = mpn.indexOf('V');
String afterV = mpn.substring(vIdx + 1);
int mIdx = afterV.indexOf('M');
String capCode = afterV.substring(0, mIdx);  // "101" or "4R7"

Package Code Extraction

// R-series: 2-char code after M and before #
// RFS-25V101MH3#P -> H3
int mIdx = mpn.indexOf('M');
String suffix = mpn.substring(mIdx + 1);
int hashIdx = suffix.indexOf('#');
String packagePart = hashIdx > 0 ? suffix.substring(0, hashIdx) : suffix;
String packageCode = packagePart.substring(0, 2);  // "H3"

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Replacement Rules

The handler supports these replacement scenarios:

1. Silmic II can replace TONEREX: Higher grade audio capacitor
2. TONEREX Type A and Type B: Interchangeable within same specs
3. Same series: Compatible if voltage and capacitance match

All replacements require matching voltage and capacitance.

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Related Files

• Handler: manufacturers/ElnaHandler.java
• Component types: CAPACITOR
• Supported types: CAPACITOR, IC

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Audio Capacitor Notes

Elna is renowned for audio-grade capacitors. Key characteristics:

1. Silmic II (RFS): Uses silk fiber separator, lowest distortion
2. TONEREX (ROA/ROB): Good balance of performance and cost
3. CE-BP: Bi-polar design for speaker crossover networks

Audio capacitors are often specified by:

• Low ESR (Equivalent Series Resistance)
• Low distortion characteristics
• High-quality dielectric materials

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Learnings & Edge Cases

• Hash suffix: Many Elna MPNs end with # or #P for packaging options
• R notation: Used for decimal values (4R7=4.7, 5R5=5.5)
• Series pattern: All R-series use R[A-Z]{2}- format
• Dynacap voltage: Uses R notation (5R5=5.5V) not standard format
• Audio grade priority: Silmic II > TONEREX > Standard for audio quality
• Bi-polar types: RBD, RBI, CE-BP are non-polar (no polarity requirement)