---
title: "Thyristor/Triac"
industry: "Electrical Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:THYRISTORTRIAC"
  data_integrity_hash: "c8a4a9caf923836461c7c593747f2349"
  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:THYRISTORTRIAC"
  data_source_uri: "https://cnfx.com/llms/industry/electrical-equipment-manufacturing/product/thyristortriac.md"
  official_resource_url: "https://cnfx.com/industry/electrical-equipment-manufacturing/product/thyristortriac"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "600-1600 V blocking voltage, 8-40 A RMS current, -40 to 125 °C junction temperature"
    unit: "A"
engineering_limits:
  max_safe_operating_point:
    value: 150
    unit: "°C"
    consequence: "Thermal runaway due to positive temperature coefficient of leakage current, exceeding silicon's intrinsic carrier concentration threshold of 1.5×10¹⁰ cm⁻³ at 150 °C"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Voltage transient exceeding 2000 V with rise time &lt; 1 μs"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "RC snubber circuit with 47 Ω resistor and 0.1 μF capacitor parallel to device"
  - node_2:
      trigger: "Junction temperature cycling between -40 °C and 125 °C at 10 Hz"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Copper-clad aluminum bond wires with 50 μm diameter and active thermal management maintaining ΔT &lt; 50 °C"
bom_nodes:
  semiconductor-wafer:
    type: "component"
    urn: "URN:CNFX:ME:SEMICONDUCTOR_WAFER"
    interface_type: "physical-logic-coupled"
  gate-terminal:
    type: "component"
    urn: "URN:CNFX:ME:GATE_TERMINAL"
    interface_type: "physical-logic-coupled"
  anodecathode-terminals:
    type: "component"
    urn: "URN:CNFX:ME:ANODECATHODE_TERMINALS"
    interface_type: "physical-logic-coupled"
  packagecase:
    type: "component"
    urn: "URN:CNFX:ME:PACKAGECASE"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
url: "https://cnfx.com/llms/industry/electrical-equipment-manufacturing/product/thyristortriac.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "048faeb7015059bf0fdec03a178f645cba5432aac843435626ae2391c1edffd4"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Thyristor/Triac

## 1. Technical Definition
A semiconductor switching device used for controlling AC power in solid state relays.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **600-1600 V blocking voltage, 8-40 A RMS current, -40 to 125 °C junction temperature**. Failure boundary: **Junction temperature exceeds 150 °C, dv/dt &gt; 1000 V/μs, di/dt &gt; 100 A/μs**, Mechanism: **Thermal runaway due to positive temperature coefficient of leakage current, exceeding silicon's intrinsic carrier concentration threshold of 1.5×10¹⁰ cm⁻³ at 150 °C**.

### 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 |
| :--- | :--- | :--- | :--- |
| Voltage transient exceeding 2000 V with rise time &lt; 1 μs | 8 | Gate oxide breakdown causing permanent conduction state | RC snubber circuit with 47 Ω resistor and 0.1 μF capacitor parallel to device |
| Junction temperature cycling between -40 °C and 125 °C at 10 Hz | 8 | Thermal fatigue cracking of aluminum bond wires at 5000 cycles | Copper-clad aluminum bond wires with 50 μm diameter and active thermal management maintaining ΔT &lt; 50 °C |

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

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

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Wafer Dicing Saw**, **Wire Bonding Machine**, **Encapsulation Press**  
**Downstream Applications**: Solid State Relay, Motor Speed Controller, Light Dimmer Switch  

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

### Q: What is the difference between a thyristor and a triac in electrical equipment?
**A**: A thyristor (SCR) conducts current in one direction only, while a triac can conduct in both directions, making triacs ideal for AC power control applications in solid state relays and electrical equipment.

### Q: What materials are used in thyristor/triac manufacturing?
**A**: Thyristors/triacs are primarily made from silicon semiconductor wafers, with copper terminals for electrical connections, and housed in ceramic or plastic packaging for insulation and protection.

### Q: How do I select the right thyristor/triac for my electrical equipment application?
**A**: Consider voltage/current ratings, switching speed, thermal characteristics, and packaging type. For AC power control in solid state relays, triacs are typically preferred, while thyristors are used for DC or half-wave AC applications.

## 6. Manufacturing Compliance

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### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Thyristor/Triac](https://cnfx.com/industry/electrical-equipment-manufacturing/product/thyristortriac)**

### 🌐 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**: THYRISTORTRIAC | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 98324174
