---
title: "Precision Current Shunt Resistor"
industry: "Manufacture of Other Electrical Equipment"
verification_protocol:
  urn: "URN:CNFX:ME:PRECISION_CURRENT_SHUNT_RESISTOR"
  data_integrity_hash: "82cdb604200351907c3eb5c904c5969a"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:PRECISION_CURRENT_SHUNT_RESISTOR"
  data_source_uri: "https://cnfx.com/llms/industry/manufacture-other-electrical-equipment/product/precision-current-shunt-resistor.md"
  official_resource_url: "https://cnfx.com/industry/manufacture-other-electrical-equipment/product/precision-current-shunt-resistor"
  is_verified_logic: true
attributes:
  primary_spec:
    status: "config-dependent"
    typical_range: "0.1-100 A continuous current, 0.1-200 mV voltage drop, -55°C to +155°C temperature"
    unit: "mΩ"
  secondary_spec:
    status: "config-dependent"
    typical_range: "0.1-100 A continuous current, 0.1-200 mV voltage drop, -55°C to +155°C temperature"
    unit: "W"
engineering_limits:
  max_safe_operating_point:
    value: 2.5
    unit: "W"
    consequence: "Joule heating (P=I²R) causing thermal expansion mismatch between resistive alloy (Manganin) and substrate (ceramic), leading to mechanical stress and resistance drift beyond ±0.1% tolerance"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Current surge exceeding 150% rated value for &gt;10 ms"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Parallel thermal fuse rated at 125°C mounted on resistor body with thermal epoxy"
  - node_2:
      trigger: "Ambient temperature cycling between -40°C and +125°C at 10°C/min rate"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Copper-molybdenum-copper clad substrate with matched 7 ppm/°C CTE to ceramic base"
bom_nodes:
  resistive-element:
    type: "component"
    urn: "URN:CNFX:ME:RESISTIVE_ELEMENT"
    interface_type: "physical-logic-coupled"
  terminal-connectors:
    type: "component"
    urn: "URN:CNFX:ME:TERMINAL_CONNECTORS"
    interface_type: "physical-logic-coupled"
  insulating-substrate:
    type: "component"
    urn: "URN:CNFX:ME:INSULATING_SUBSTRATE"
    interface_type: "physical-logic-coupled"
  protective-coating:
    type: "component"
    urn: "URN:CNFX:ME:PROTECTIVE_COATING"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015: QUALITY MANAGEMENT SYSTEMS - REQUIREMENTS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/manufacture-other-electrical-equipment/product/precision-current-shunt-resistor.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "5853a9ed28eae4c63cf3126b4032543a93c3b243e1033dc23ebcfb4f57e1ac64"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Precision Current Shunt Resistor

## 1. Technical Definition
Low-resistance precision resistor for accurate current measurement in electrical circuits.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.1-100 A continuous current, 0.1-200 mV voltage drop, -55°C to +155°C temperature**. Failure boundary: **Power dissipation exceeding 2.5 W for 1 mΩ resistor, temperature rise above 155°C, voltage drop exceeding 200 mV**, Mechanism: **Joule heating (P=I²R) causing thermal expansion mismatch between resistive alloy (Manganin) and substrate (ceramic), leading to mechanical stress and resistance drift beyond ±0.1% tolerance**.

### 2.1 Analytical Physics Model
Governed by the **Joule Heating & Thermal Resistance**:

> **Primary Equation**: $P = I^2 R = \frac{V^2}{R}$  
> **Engineering Impact**: Governs heating element sizing for shrink tunnels/sealers.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| I | Current | Engineering Constant |
| R | Resistance | Engineering Constant |
| V | Voltage | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Current surge exceeding 150% rated value for &gt;10 ms | 8 | Resistance element thermal runaway causing permanent &gt;5% resistance increase | Parallel thermal fuse rated at 125°C mounted on resistor body with thermal epoxy |
| Ambient temperature cycling between -40°C and +125°C at 10°C/min rate | 8 | Solder joint fatigue cracking due to CTE mismatch (ceramic: 7 ppm/°C vs solder: 25 ppm/°C) | Copper-molybdenum-copper clad substrate with matched 7 ppm/°C CTE to ceramic base |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| primary_spec | Config-dependent | mΩ | Verified |
| secondary_spec | Config-dependent | W | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Precision Resistance Measurement System**, **Temperature-Controlled Solder Reflow Oven**, **Automated Laser Marking Machine**  
**Downstream Applications**: Power Supply Units, Battery Management Systems, Industrial Motor Drives  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What materials are used in this precision current shunt resistor?
**A**: This resistor uses Manganin alloy or Copper-nickel alloy for the resistive element, a ceramic substrate for insulation, and nickel-plated copper terminals for reliable connections.

### Q: What are the key specifications for this current shunt resistor?
**A**: Key specifications include current rating (A), power rating (W), resistance value (mΩ), temperature coefficient (ppm/°C), thermal resistance (°C/W), and tolerance (%).

### Q: How does this resistor ensure accurate current measurement?
**A**: The low-resistance design, stable temperature coefficient, and precision materials like Manganin alloy minimize measurement errors, providing reliable current sensing in electrical circuits.

## 6. Manufacturing Compliance
- ISO 9001:2015: QUALITY MANAGEMENT SYSTEMS - REQUIREMENTS

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### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Precision Current Shunt Resistor](https://cnfx.com/industry/manufacture-other-electrical-equipment/product/precision-current-shunt-resistor)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **4** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: PRECISION_CURRENT_SHUNT_RESISTOR | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 857d3337
