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TECHNYL® PROTECT A 50H1 BK

Halogen-Free Flame-Retardant PA66 · Ideal for Connectors & Electrical Applications

UL94 V0
Halogen-Free FR
Heat Stabilized
EN 45545-2 Certified

TECHNYL® PROTECT A 50H1 BK (previously TECHNYL A 50H1 BLACK) is an unreinforced polyamide 66 (PA66) grade based on a non-phosphorus and non-halogenated flame retardant system, heat stabilized, for injection molding. This flame retardant grade offers excellent filling qualities combined with good stiffness, making it an ideal material choice for connectors and electrical/electronic applications.

📋 Product Overview

  • Polymer Type: PA66 (Polyamide 66)
  • Reinforcement: Unreinforced
  • Flame Retardant System: Halogen-free & Phosphorus-free
  • Heat Stabilized: Yes
  • UL94 Rating: V0 at 0.40mm / 0.75mm / 1.5mm / 3.0mm
  • Processing: Injection Molding
  • Colors Available: Black, Natural, White, Grey
  • Certifications: RoHS, REACH, UL Yellow Card, European Railways EN 45545-2
  • Typical Applications: Connectors, Electrical/Electronic Applications

📊 Technical Data Sheet

Physical Properties

Property Standard Value Unit
Density ISO 1183 1.16 g/cm³
Water Absorption (24h, 23°C) ISO 62 0.88 %
Molding Shrinkage (parallel) ISO 294-4 1.3 %
Molding Shrinkage (normal) ISO 294-4 0.95 %

Mechanical Properties (DAM / Conditioned)

Property Standard Value (DAM / Cond.) Unit
Tensile Modulus ISO 527-1/-2 3800 / 1700 MPa
Stress at Break ISO 527-1/-2 75 / 40 MPa
Strain at Break ISO 527-1/-2 9 / >100 %
Flexural Modulus (ISO) ISO 178 3700 / 1700 MPa
Flexural Strength (ISO) ISO 178 130 / 55 MPa
Charpy Impact Strength (+23°C) ISO 179/1eU 80 / No Break kJ/m²
Charpy Notched Impact (+23°C) ISO 179/1eA 3.2 / 7 kJ/m²
Izod Notched Impact (+23°C) ISO 180/1A 3 / – kJ/m²

Thermal Properties

Property Standard Value Unit
Melting Temperature ISO 11357-1 263 °C
HDT (0.45 MPa) ISO 75 237 °C
HDT (1.80 MPa) ISO 75 85 °C

Electrical Properties

Property Standard Value Unit
Volume Resistivity IEC 62631-3-1 3E+013 ohm.m
Surface Resistivity IEC 62631-3-1 3E+015 ohm
Comparative Tracking Index (CTI) IEC 60112 600 V
Dielectric Strength (1 mm) IEC 60243-1 21 kV/mm

Flammability

Property Thickness Standard Rating/Value
UL 94 Flammability 0.40 mm UL 94 V0
UL 94 Flammability 0.75 mm UL 94 V0
UL 94 Flammability 1.5 mm UL 94 V0
UL 94 Flammability 3.0 mm UL 94 V0
GWFI (0.75-3.0 mm) — IEC 60695-2-12 960 °C
GWIT (0.40-0.75 mm) — IEC 60695-2-13 960 °C
GWIT (1.5 mm) — IEC 60695-2-13 775 °C
Oxygen Index — ISO 4589 33%

✅ UL Yellow Card available (QMFZ2.E44716)

⚙️ Processing Conditions

🌡️ Drying Temperature
80°C
💧 Max Moisture
0.2%
🔥 Rear Temperature
260 – 270°C
🔥 Middle Temperature
265 – 275°C
🔥 Front Temperature
265 – 275°C
🏭 Mold Temperature
60 – 80°C
(Up to 120°C for high surface quality)

⚠️ Injection Advice

All reinforced, flame retardant compounds generate some level of abrasion/corrosion to steel processing equipment. DOMO recommends using steel with high chromium and high carbon content (minimum 16% chromium) for equipment in contact with molten flame retardant compounds. Strictly follow recommended processing conditions to prevent corrosion and ensure product performance.

The material is supplied in airtight bags, ready for use. If the virgin material has absorbed moisture, it must be dried with dehumidified air drying equipment (dew point minimum -20°C). Recommended drying time: 2-4 hours.

🎯 Target Applications

🔌 Connectors
⚡ Electrical/Electronic Applications
🚆 Railway Vehicle Components
🏭 Electrical Protection Devices

📌 Special Certification: This grade is certified to European Railways Standard EN 45545-2, suitable for electrical components in railway vehicles.

🌟 Key Advantages

  • ✅ Ultra-Thin Wall V0: UL94 V0 rating achieved at 0.40mm thickness
  • ✅ Halogen & Phosphorus-Free FR: Environmentally friendly, low corrosion, low smoke
  • ✅ Excellent Filling Qualities: Suitable for complex connector geometries
  • ✅ Good Stiffness: Balanced rigidity and toughness in unreinforced system
  • ✅ High CTI (600V): Excellent tracking resistance
  • ✅ Heat Stabilized: Long-term thermal aging resistance
  • ✅ European Railways EN 45545-2 Certified: Suitable for rail applications
  • ✅ RoHS & REACH Compliant: Meets global environmental regulations

Disclaimer: The information provided in this documentation corresponds to our technical knowledge at the date of its publication and does not constitute a specification. DOMO cannot anticipate all conditions under which this information and our products may be used. Users are advised to make their own tests to determine the safety and suitability for their own purposes. Unless otherwise agreed in writing, DOMO sells the product without warranties. Unless specifically indicated, this grade is not suitable for pharmaceutical/medical applications.

Source: DOMO Chemicals Official Technical Data Sheet (TECHNYL PROTECT A 50H1 BK, Document 001615)

Last Updated: May 2026

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