Industry-Verified Manufacturing Data (2026)

Molded Package

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Molded Package used in the Computer, Electronic and Optical Product Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Molded Package is characterized by the integration of Molded Body and Lead Frame. In industrial production environments, manufacturers listed on CNFX commonly emphasize Epoxy resin construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A protective housing for photocoupler components formed through injection molding processes.

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Product Specifications

Technical details and manufacturing context for Molded Package

Definition
The molded package is the protective enclosure within a photocoupler assembly that houses and insulates the light-emitting diode (LED) and photodetector components. It provides electrical isolation, mechanical protection, and environmental sealing while allowing optical transmission between the internal components.
Working Principle
The molded package is manufactured using injection molding techniques where thermoplastic or thermosetting materials are heated, injected into precision molds, and cooled to form the protective housing. It maintains precise optical alignment between the LED and photodetector while providing electrical insulation and environmental protection.
Common Materials
Epoxy resin, Silicone, Polycarbonate
Technical Parameters
  • Package dimensions including length, width, height, and lead spacing (mm) Standard Spec
Components / BOM
  • Molded Body
    Main protective housing that encapsulates the internal components
    Material: Epoxy resin or silicone
  • Lead Frame
    Metal structure that provides electrical connections and mechanical support
    Material: Copper alloy
  • Optical Window
    Transparent section that allows light transmission between LED and photodetector
    Material: Clear epoxy or polycarbonate
  • Internal Cavity
    Space within the package that houses the LED and photodetector chips
    Material: Air or inert gas
Engineering Reasoning
0-150°C ambient temperature, 0-100% relative humidity (non-condensing), 0-2.5 MPa internal pressure
Glass transition temperature (Tg) of 125°C for epoxy molding compound, 3.0 MPa internal pressure causing delamination, 0.5% moisture absorption by weight leading to popcorning
Design Rationale: Coefficient of thermal expansion (CTE) mismatch between epoxy molding compound (15-20 ppm/°C) and silicon die (2.6 ppm/°C) causing interfacial stress exceeding 50 MPa at 125°C, hydrolytic degradation of epoxy-silicon interface at >85°C/85% RH
Risk Mitigation (FMEA)
Trigger Moisture ingress exceeding 0.3% weight absorption during storage
Mode: Vapor pressure buildup during reflow at 260°C causing package cracking (popcorning)
Strategy: Baking at 125°C for 24 hours prior to assembly, moisture barrier coating with 5μm parylene-C layer
Trigger Thermal cycling between -40°C and 125°C at 10 cycles/hour
Mode: Interfacial delamination at die-attach interface due to CTE mismatch stress accumulation
Strategy: Underfill material with CTE of 25 ppm/°C and elastic modulus of 6 GPa, copper leadframe with 17 ppm/°C CTE

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Molded Package.

injection molded photocoupler package epoxy resin molded housing electronics protective optical window molded package molded lead frame package manufacturing silicone molded cavity for photocouplers

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Photocoupler Assembly
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Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric to 1.5 bar (molded package structural limits)
other spec: Mold flow index: 10-50 g/10min (for injection molding process compatibility)
temperature: -40°C to +125°C (operational range for typical photocoupler applications)
Media Compatibility
✓ Epoxy resin encapsulation ✓ Silicon-based potting compounds ✓ Clean room assembly environments
Unsuitable: High-vibration industrial machinery (due to potential for mechanical stress on molded joints)
Sizing Data Required
  • Photocoupler component dimensions (LxWxH)
  • Required creepage/clearance distances for electrical isolation
  • Number of pins/pads and their pitch/spacing

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Cracking or fracture
Cause: Thermal cycling stress exceeding material fatigue limits, often due to rapid temperature changes during operation or environmental exposure.
Delamination or bond failure
Cause: Moisture ingress or contamination at interfaces, combined with mechanical stress, compromising adhesive or molded bonds.
Maintenance Indicators
  • Visible cracks, crazing, or discoloration on the package surface
  • Audible creaking or popping sounds during thermal cycles, indicating internal stress relief
Engineering Tips
  • Implement controlled thermal ramp rates during operation and maintenance to minimize thermal shock stress on the package material.
  • Apply conformal coatings or sealants at vulnerable interfaces and regularly inspect for moisture ingress using non-destructive testing methods.

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality Management Systems ASTM D3641 - Standard Practice for Injection Molding Test Specimens of Thermoplastic Molding and Extrusion Materials CE Marking - EU Directive 2001/95/EC on General Product Safety
Manufacturing Precision
  • Wall Thickness: +/-0.1mm
  • Dimensional Stability: +/-0.05% of nominal dimension
Quality Inspection
  • Dimensional Verification with CMM (Coordinate Measuring Machine)
  • Visual Inspection for Surface Defects and Flash

Factories Producing Molded Package

Verified manufacturers with capability to produce this product in China

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✓ 93% Supplier Capability Match Found

T Technical Director from Germany Feb 07, 2026
★★★★★
"Impressive build quality. Especially the technical reliability is very stable during long-term operation."
Technical Specifications Verified
P Project Engineer from Brazil Feb 04, 2026
★★★★☆
"As a professional in the Computer, Electronic and Optical Product Manufacturing sector, I confirm this Molded Package meets all ISO standards. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
S Sourcing Manager from Canada Feb 01, 2026
★★★★★
"Standard OEM quality for Computer, Electronic and Optical Product Manufacturing applications. The Molded Package arrived with full certification."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

18 sourcing managers are analyzing this specification now. Last inquiry for Molded Package from Germany (1h ago).

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Frequently Asked Questions

What materials are used in molded packages for photocouplers?

Common materials include epoxy resin for durability, silicone for flexibility and thermal stability, and polycarbonate for impact resistance and optical clarity in electronic applications.

How does the injection molding process benefit photocoupler packaging?

Injection molding ensures precise, repeatable production of molded bodies with integrated features like internal cavities and optical windows, providing consistent protection and alignment for sensitive photocoupler components.

What are the key components in a molded package BOM for photocouplers?

The bill of materials typically includes the molded body (housing), lead frame (for electrical connections), optical window (for light transmission), and internal cavity (to protect the photocoupler chip).

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Specifications verified by CNFX Industrial Index (v2.6.03) for Computer, Electronic and Optical Product Manufacturing sector.

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