---
title: "Feedthrough"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:FEEDTHROUGH"
  data_integrity_hash: "424277c5ba1baf746293df43aac5a5c0"
  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:FEEDTHROUGH"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/feedthrough.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/feedthrough"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "1e-7 to 1e-9 mbar vacuum pressure range, -40°C to 200°C temperature range, 0-600 VDC electrical rating"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 1
    unit: "e"
    consequence: "Metal-to-ceramic brazing failure due to coefficient of thermal expansion mismatch (CTE: Kovar 5.3 ppm/K vs. Alumina 7.2 ppm/K), outgassing of polymer seals above 150°C, electron multipacting at 10^-3 mbar pressure range"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Thermal cycling between -40°C and 200°C at 5°C/min rate"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "CTE-matched material selection (Ni-Fe alloy with 5.5 ppm/K), graded brazing with Ag-Cu-Ti filler, thermal stress relief annealing at 850°C for 2 hours"
  - node_2:
      trigger: "Partial pressure of water vapor exceeding 1e-4 mbar at 300 K"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "RF-sputtered alumina coating with 99.5% purity, bake-out procedure at 350°C for 48 hours, getter material integration (Zr-V-Fe alloy)"
bom_nodes:
  flange:
    type: "component"
    urn: "URN:CNFX:ME:FLANGE"
    interface_type: "physical-logic-coupled"
  conductor-penetrator:
    type: "component"
    urn: "URN:CNFX:ME:CONDUCTOR_PENETRATOR"
    interface_type: "physical-logic-coupled"
  insulator-seal:
    type: "component"
    urn: "URN:CNFX:ME:INSULATOR_SEAL"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/feedthrough.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "56bc354734fb9c8759b664dfcc0be9bafee316426208fc8a6fcf6aa6b6c23234"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Feedthrough

## 1. Technical Definition
A vacuum-tight electrical, fluid, or mechanical connection that passes through the wall of a vacuum chamber.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **1e-7 to 1e-9 mbar vacuum pressure range, -40°C to 200°C temperature range, 0-600 VDC electrical rating**. Failure boundary: **Leak rate exceeds 1e-9 mbar·L/s (helium leak detection threshold), dielectric breakdown at 650 VDC, thermal expansion mismatch exceeding 15 ppm/K differential**, Mechanism: **Metal-to-ceramic brazing failure due to coefficient of thermal expansion mismatch (CTE: Kovar 5.3 ppm/K vs. Alumina 7.2 ppm/K), outgassing of polymer seals above 150°C, electron multipacting at 10^-3 mbar pressure range**.

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Thermal cycling between -40°C and 200°C at 5°C/min rate | 8 | Ceramic-to-metal seal fracture creating 1e-6 mbar·L/s leak path | CTE-matched material selection (Ni-Fe alloy with 5.5 ppm/K), graded brazing with Ag-Cu-Ti filler, thermal stress relief annealing at 850°C for 2 hours |
| Partial pressure of water vapor exceeding 1e-4 mbar at 300 K | 8 | Surface flashover at 450 VDC across 10 mm ceramic insulator | RF-sputtered alumina coating with 99.5% purity, bake-out procedure at 350°C for 48 hours, getter material integration (Zr-V-Fe alloy) |

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

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

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Vacuum Pump System**, **Leak Detection System**, **High Voltage Power Supply**  
**Downstream Applications**: Semiconductor Processing Chambers, Analytical Instrumentation, Research Vacuum Systems  

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

### Q: What materials are commonly used for feedthroughs in vacuum applications?
**A**: Common materials include Stainless Steel (304, 316 grades), Copper for conductivity, Alumina Ceramic for insulation, Glass for viewports, and Viton (FKM) for sealing applications.

### Q: What are the main components of a vacuum feedthrough?
**A**: A typical feedthrough consists of three main components: the Conductor/Penetrator (carries signal or fluid), the Flange (provides vacuum-tight mounting), and the Insulator/Seal (maintains vacuum integrity while isolating components).

### Q: How do I select the right feedthrough for my machinery application?
**A**: Consider your vacuum level, temperature range, media type (electrical, fluid, mechanical), material compatibility with your process, flange size/type, and required certifications for your industry application.

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

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### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Feedthrough](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/feedthrough)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **3** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: FEEDTHROUGH | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 5725ac4e
