elna

# 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 ```java // 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 ```java // 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 ```java // 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 ```java // 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: 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. --- ## 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: 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 --- ## 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) <!-- Add new learnings above this line -->