Chilisin

Series Reference

SQC - Chip Inductors

MHCI - Power Inductors

MHCC - Coupled Inductors

CS - Ferrite Chip Inductors

Inductance Encoding

Chilisin uses standard EIA encoding:

R-Notation (Decimal Point)

3-Digit Multiplier Code

Decoding Algorithm

// R at start (R10, R22, R47)
if (code.startsWith("R") && !code.substring(1).contains("R")) {
    String digits = code.substring(1);
    double value = Double.parseDouble("0." + digits);
    return formatInductance(value);  // Returns "100nH" etc.
}

// R in middle (1R0, 2R2)
if (code.contains("R")) {
    String normalized = code.replace("R", ".");
    double value = Double.parseDouble(normalized);
    return formatInductance(value);  // Returns "1.0uH" etc.
}

// 3-digit code
if (code.length() >= 3 && code.matches("\\d{3}")) {
    int mantissa = Integer.parseInt(code.substring(0, 2));
    int exponent = Integer.parseInt(code.substring(2, 3));
    double microhenries = mantissa * Math.pow(10, exponent);
    return formatInductance(microhenries);
}

Package Size Codes

Size Code to Dimensions

Tolerance Codes

Handler Implementation Notes

Series Extraction

// Returns series + size as the full identifier
// SQC453226T-100M-N -> "SQC4532"
// MHCI0504-1R0M-R8 -> "MHCI0504"

Matcher m = SQC_PATTERN.matcher(upperMpn);
if (m.matches()) {
    return m.group(1) + m.group(2);  // SQC + size
}

m = MHCI_PATTERN.matcher(upperMpn);
if (m.matches()) {
    return m.group(1) + m.group(2);  // MHCI + size
}
// Similar for MHCC, CS

Package Code Extraction

// Extract size code and map to dimensions
String sizeCode = extractSizeCode(mpn);
if (SIZE_CODE_MAP.containsKey(sizeCode)) {
    return SIZE_CODE_MAP.get(sizeCode);  // e.g., "4.5x3.2mm"
}
return sizeCode;  // Return raw code if no mapping

SQC Height Code

SQC series uniquely includes a 2-digit height code:

// SQC453226T -> 4532 (size) + 26 (height = 2.6mm) + T (type)
Matcher m = SQC_PATTERN.matcher(mpn);
if (m.matches()) {
    String size = m.group(2);    // "4532"
    String height = m.group(3);  // "26" = 2.6mm
    String type = m.group(4);    // "T"
}

Pattern Details

SQC Pattern

Pattern.compile(
    "^(SQC)(\\d{4})(\\d{2})([A-Z])?[-]?([0-9R]+)([A-Z])[-]?([A-Z0-9]*)$"
);
// Groups: (1)series (2)size (3)height (4)type (5)value (6)tolerance (7)packaging

MHCI Pattern

Pattern.compile(
    "^(MHCI)(\\d{4})[-]?([0-9R]+)([A-Z])[-]?([A-Z0-9]*)$"
);
// Groups: (1)series (2)size (3)value (4)tolerance (5)packaging

MHCC Pattern

Pattern.compile(
    "^(MHCC)(\\d{4})[-]?([0-9R]+)?([A-Z])?[-]?([A-Z0-9]*)$"
);
// Optional value for coupled inductors

CS Pattern

Pattern.compile(
    "^(CS)(\\d{4})[-]?([0-9R]+)?([A-Z])?[-]?([A-Z0-9]*)$"
);
// CS has only 2-letter prefix

Component Types

Chilisin products map to:

• INDUCTOR - All inductor products
• IC - Also registered for pattern matching compatibility

Common Part Numbers

Related Files

• Handler: manufacturers/ChilisinHandler.java
• Supported types: INDUCTOR, IC
• No manufacturer-specific ComponentType enum entries

Learnings & Edge Cases

• SQC height code: Unique to SQC series. The 2 digits after size encode height in 0.1mm units (26 = 2.6mm).
• CS prefix is short: Only 2 letters (CS), unlike others with 3-4 letters (SQC, MHCI, MHCC).
• Dashes are optional: MPNs may or may not include dashes between fields. Patterns must handle both.
• MHCC value optional: Coupled inductors may not include a value code in the MPN.
• R at start vs middle: R10 = 0.10uH, 1R0 = 1.0uH. Different parsing logic needed.
• Package code returns dimensions: Unlike other handlers, Chilisin handler returns "4.5x3.2mm" format, not imperial code.