vikingtech

name: vikingtech description: Viking Tech MPN encoding patterns, suffix decoding, and handler guidance. Use when working with Viking Tech precision resistors including chip, anti-sulfur, and current sense resistors.

Viking Tech Manufacturer Skill

MPN Structure

Viking Tech MPNs follow this general structure:

[SERIES][SIZE]-[TOLERANCE][TYPE]-[VALUE][SUFFIX]
   |      |        |        |       |       |
   |      |        |        |       |       +-- Lead-free suffix (ELF, GLF)
   |      |        |        |       +-- 4-digit value code (1001=1k)
   |      |        |        +-- Type code (X, etc.)
   |      |        +-- Tolerance (F=1%, G=2%, J=5%)
   |      +-- Package size (0402, 0603, 0805, 1206, etc.)
   +-- Series prefix (CR, AR, CSR, PA)

Example Decoding

CR0603-FX-1001ELF
|  |   | |  |   |
|  |   | |  |   +-- ELF = Lead-free suffix
|  |   | |  +-- 1001 = 1k (100 x 10^1)
|  |   | +-- X = Type code
|  |   +-- F = 1% tolerance
|  +-- 0603 = 0603 package (1.6x0.8mm)
+-- CR = Chip Resistor series

AR0603-FX-1002GLF
|  |   | |  |   |
|  |   | |  |   +-- GLF = Lead-free suffix (alternate)
|  |   | |  +-- 1002 = 10k (100 x 10^2)
|  |   | +-- X = Type code
|  |   +-- F = 1% tolerance
|  +-- 0603 = 0603 package
+-- AR = Anti-sulfur Resistor series

CSR0805-0R010F
|   |   |    |
|   |   |    +-- F = 1% tolerance
|   |   +-- 0R010 = 0.010 ohm (R notation)
|   +-- 0805 = 0805 package
+-- CSR = Current Sense Resistor series

Series Reference

Package Sizes

Viking Tech uses standard EIA package codes:

Tolerance Codes

Value Codes

Standard 4-Digit Code (CR, AR series)

Format: ABCD where ABC = significant digits, D = multiplier (10^D)

R Notation (CSR series)

For low-ohm current sense resistors, R indicates decimal point:

Handler Implementation Notes

Pattern Recognition

// CR series - Standard chip resistors
"^CR[0-9]{4}.*"  // CR0603...

// AR series - Anti-sulfur resistors
"^AR[0-9]{4}.*"  // AR0603...

// PA series - Power resistors
"^PA[0-9]+.*"    // PA0805..., PA1206...

// CSR series - Current sense resistors
"^CSR[0-9]{4}.*" // CSR0805...

Package Code Extraction

// CR, AR series: size code starts at position 2
if (mpn.matches("^(CR|AR)[0-9]{4}.*")) {
    String sizeCode = mpn.substring(2, 6);  // "0603"
    return sizeCode;
}

// CSR series: size code starts at position 3
if (mpn.matches("^CSR[0-9]{4}.*")) {
    String sizeCode = mpn.substring(3, 7);  // "0805"
    return sizeCode;
}

// PA series: size code starts at position 2
if (mpn.matches("^PA[0-9]{4}.*")) {
    String sizeCode = mpn.substring(2, 6);  // "0805"
    return sizeCode;
}

Tolerance Extraction

// CR/AR format: CR0603-FX-1001ELF - tolerance after first hyphen
if (mpn.matches("^(CR|AR)[0-9]{4}-[FGJ].*")) {
    int dashIndex = mpn.indexOf('-');
    char toleranceChar = mpn.charAt(dashIndex + 1);
    // F=1%, G=2%, J=5%
}

// CSR format: CSR0805-0R010F - tolerance at end before suffix
// Find F, G, or J after the value

Value Extraction

// CR/AR format: value is in third segment
// CR0603-FX-1001ELF -> 1001
String[] parts = mpn.split("-");
if (parts.length >= 3) {
    String valuePart = parts[2].replaceAll("[A-Z]+$", "");  // Remove ELF
    return decodeResistorValue(valuePart);  // 1001 -> 1k
}

// CSR format: value after hyphen with R notation
// CSR0805-0R010F -> 0R010 -> 0.010 ohm
int dashIndex = mpn.indexOf('-');
String valuePart = mpn.substring(dashIndex + 1).replaceAll("[FGJ].*$", "");
return valuePart.replace("R", ".");  // 0R010 -> 0.010

Value Decoding (4-digit code)

private String decodeResistorValue(String code) {
    if (code.matches("[0-9]{4}")) {
        int significantDigits = Integer.parseInt(code.substring(0, 3));
        int multiplier = Integer.parseInt(code.substring(3));
        double value = significantDigits * Math.pow(10, multiplier);

        if (value >= 1000000) {
            return String.format("%.0fM", value / 1000000);
        } else if (value >= 1000) {
            return String.format("%.0fk", value / 1000);
        } else {
            return String.format("%.0f", value);
        }
    }
    return code;
}

Replacement Rules

The handler supports replacement based on:

1. Same series and size required: CR0603 can only replace CR0603
2. Tolerance must match: F (1%) cannot be replaced by J (5%)
3. Same value required: Resistance value must be identical

// Same series and size
String series1 = extractSeries(mpn1);  // "CR0603"
String series2 = extractSeries(mpn2);  // "CR0603"
if (!series1.equals(series2)) return false;

// Same tolerance
String tolerance1 = extractTolerance(mpn1);  // "F"
String tolerance2 = extractTolerance(mpn2);  // "F"
if (!tolerance1.equals(tolerance2)) return false;

Related Files

• Handler: manufacturers/VikingTechHandler.java
• Component types: RESISTOR
• Supported types: RESISTOR, IC

Application Notes

Anti-Sulfur Resistors (AR series)

AR series resistors use special electrode materials to resist sulfur corrosion. Use in:

• Industrial environments with sulfur gases
• Automotive applications
• LED lighting (near rubber components)
• Any application with potential sulfur exposure

Current Sense Resistors (CSR series)

CSR series are optimized for current measurement:

• Low inductance design
• 4-terminal (Kelvin) sensing available on larger sizes
• Low TCR (Temperature Coefficient of Resistance)
• Typical values: 0.001 ohm to 1 ohm

Learnings & Edge Cases

• Value code position varies: CR/AR use segment-based (third hyphen segment), CSR uses position-based
• R notation for CSR: 0R010 means 0.010 ohm (R is decimal point)
• Suffix meanings: ELF and GLF both indicate lead-free, different internal codes
• Series in extraction: extractSeries() returns series+size (CR0603) not just series (CR)
• 4-digit value code: First 3 digits are significant, 4th is multiplier (1001 = 100 x 10^1 = 1k)
• CSR tolerance position: Tolerance letter comes after value, not in separate segment