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)
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 |
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 |
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 |
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"
Replacement Rules
The handler supports these replacement scenarios:
- Silmic II can replace TONEREX: Higher grade audio capacitor
- TONEREX Type A and Type B: Interchangeable within same specs
- Same series: Compatible if voltage and capacitance match
All replacements require matching voltage and capacitance.
Related Files
- Handler:
manufacturers/ElnaHandler.java
- Component types:
CAPACITOR
- Supported types: CAPACITOR, IC
Audio Capacitor Notes
Elna is renowned for audio-grade capacitors. Key characteristics:
- Silmic II (RFS): Uses silk fiber separator, lowest distortion
- TONEREX (ROA/ROB): Good balance of performance and cost
- 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
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)
majiayu000