---
title: "Magnetics Module (for Ethernet NICs)"
industry: "Computer, Electronic and Optical Product Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:MAGNETICS_MODULE_FOR_ETHERNET_NICS"
  data_integrity_hash: "8b35577029ad8000120f51589eee6c0b"
  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:MAGNETICS_MODULE_FOR_ETHERNET_NICS"
  data_source_uri: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/magnetics-module-for-ethernet-nics.md"
  official_resource_url: "https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/magnetics-module-for-ethernet-nics"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.8-1.2 V differential signal voltage, 100 Ω differential impedance ±10%, -40°C to +85°C ambient temperature"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 1.5
    unit: "V"
    consequence: "Ferrite core saturation due to excessive differential current exceeding 100 mA, insulation breakdown at 2500 V/mm electric field strength, thermal degradation of epoxy encapsulation above 150°C"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Common-mode transient exceeding 25 kV/μs slew rate"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Multi-layer insulation with 8 kV dielectric strength, reinforced creepage distance of 8 mm"
  - node_2:
      trigger: "Sustained differential current exceeding 120 mA at 125 MHz"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "High-permeability MnZn ferrite core with 5000 μ initial permeability, current-limiting series resistance of 2.2 Ω"
bom_nodes:
  pulse-transformer:
    type: "part"
    urn: "URN:CNFX:ME:PULSE_TRANSFORMER"
    interface_type: "physical-logic-coupled"
  common-mode-choke:
    type: "part"
    urn: "URN:CNFX:ME:COMMON_MODE_CHOKE"
    interface_type: "physical-logic-coupled"
  termination-resistors:
    type: "component"
    urn: "URN:CNFX:ME:TERMINATION_RESISTORS"
    interface_type: "physical-logic-coupled"
  protective-housing:
    type: "part"
    urn: "URN:CNFX:ME:PROTECTIVE_HOUSING"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
  - standard: "CE MARKING - EMC DIRECTIVE 2014/30/EU"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/magnetics-module-for-ethernet-nics.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "1d710e52da839741b018433c03b240e1c44be8f21cc2e0f30aa0f15f5b794c70"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Magnetics Module (for Ethernet NICs)

## 1. Technical Definition
A magnetic component that provides signal isolation, impedance matching, and noise filtering for Ethernet network interface cards.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.8-1.2 V differential signal voltage, 100 Ω differential impedance ±10%, -40°C to +85°C ambient temperature**. Failure boundary: **Signal voltage exceeding 1.5 V peak-to-peak, common-mode voltage exceeding 1500 Vrms for 60 seconds, core saturation at 0.35 T magnetic flux density**, Mechanism: **Ferrite core saturation due to excessive differential current exceeding 100 mA, insulation breakdown at 2500 V/mm electric field strength, thermal degradation of epoxy encapsulation above 150°C**.

### 2.1 Analytical Physics Model
Governed by the **EMI Shielding Effectiveness (SE)**:

> **Primary Equation**: $SE = 20 \log(\frac{E_{in}}{E_{out}})$  
> **Engineering Impact**: Ensures control stability in high-frequency inverter zones.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| E_{in} | Incident Field | Engineering Constant |
| E_{out} | Transmitted Field | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Common-mode transient exceeding 25 kV/μs slew rate | 8 | Insulation breakdown between primary and secondary windings | Multi-layer insulation with 8 kV dielectric strength, reinforced creepage distance of 8 mm |
| Sustained differential current exceeding 120 mA at 125 MHz | 8 | Ferrite core saturation causing signal distortion exceeding 3 dB insertion loss | High-permeability MnZn ferrite core with 5000 μ initial permeability, current-limiting series resistance of 2.2 Ω |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | mm | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Pulse Transformer](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/pulse-transformer.md) `(Standalone System)`
- [Common Mode Choke](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/common-mode-choke.md) `(Standalone System)`
- [Protective Housing](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/protective-housing.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **SMT Pick-and-Place Machine**, **Reflow Soldering Oven**, **Automated Optical Inspection System**  
**Downstream Applications**: Ethernet Network Interface Cards, Network Switches, Industrial Ethernet Gateways  

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

### Q: What is the primary function of a magnetics module in Ethernet NICs?
**A**: The magnetics module provides electrical isolation between the network interface card and the Ethernet cable, preventing ground loops and protecting sensitive electronics from voltage surges while ensuring proper signal integrity.

### Q: How does this module improve Ethernet network performance?
**A**: It performs impedance matching to minimize signal reflections, filters out common-mode noise and electromagnetic interference, and provides galvanic isolation to maintain signal quality and network reliability.

### Q: What materials are used in these magnetics modules and why?
**A**: Ferrite cores provide high magnetic permeability for effective filtering, copper wire ensures efficient signal transmission, epoxy resin offers environmental protection and stability, and plastic housing provides mechanical protection and insulation.

## 6. Manufacturing Compliance
- ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS
- CE MARKING - EMC DIRECTIVE 2014/30/EU

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Magnetics Module (for Ethernet NICs)](https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/magnetics-module-for-ethernet-nics)**

### 🌐 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**: MAGNETICS_MODULE_FOR_ETHERNET_NICS | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: b261f561
