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Thermal Management

Dobeckan® FN 3400 LV – Low-viscosity single-component polyester resin for electrical motor and transformer impregnation

Item Name: Dobeckan® FN 3400 LV
Manufacturer: ELANTAS Europe / ELANTAS Italia Quattordio Site
• Technologies: Single-component DAP polyester resin, low VOC, thermal class H, high dielectric and mechanical properties
Color: Yellowish
Cure Type: Heat cure (oven)
Package Size: Contact to Techniq VN for details.
Shelf Life: 12 months

1. Product Overview

Dobeckan® FN 3400 LV is a single-component, low-viscosity impregnating resin based on unsaturated polyester with DAP (diallyl phthalate) reactive thinner. It is designed for electrical insulation systems, offering high winding penetration, minimal drain losses, and excellent long-term thermal stability. The cured resin is tough, mechanically strong, and resistant to chemicals and vapors. Thermal class is H (180 °C), UL approved.


2. Applications

  • Impregnation of small, medium, and large motors (up to sizes 180–190), particularly under reciprocating operation

  • Use in transformers and electrical machines requiring thermal class H

  • Suitable for dipping, dip-rolling, and vacuum processes for compact windings and bandaged components

3. Typical Properties

As Supplied (Uncured)

Property Condition / Method Value Unit
Shelf Life 23 °C 12 months
Appearance / Colour Liquid / Yellowish
Density DIN 51757, 23 °C 1110–1150 g/cm³
Binder Content IEC 464-2 (1.5 g, 1h/150 °C) 100 %
Flow Time ISO 2431, Ford Cup 4, 25 °C 70–100 sec
Flash Point 160 °C
Gel Time (Initial, 100 °C) Deatech test 50–90 min

Curing Conditions

Temperature (°C) 100 110 120 130 140 150
Curing Time (h) 12 8 6 4

Mechanical Properties (Cured)

Property Condition / Method Value Unit
Bond Strength Twisted coil, 23 °C >180 N
155 °C >110 N
180 °C >60 N
Bond Strength (Helical coil) IEC 60290, 199 °C 20–22 N
Bond Strength (Twisted pair) IEC 60172, 188 °C 1000 V

Dielectric Properties (Cured)

Property Condition Value Unit
Volume Resistivity (after water immersion) Initial / 7 d, IEC 60464-2 >10¹⁵ Ω·cm
Volume Resistivity (elevated temp) 155 °C / 180 °C, IEC 60464-2 >10¹¹ / – Ω·cm
Electrical Strength (after water immersion) Initial / 24 h, IEC 60464-2 >120 / >140 kV/mm
Electrical Strength (elevated temp) 155 °C / 180 °C, IEC 60464-2 >100 / – kV/mm
Temperature at εr tan δ = 0.1 IEC 60250, 50 Hz / 1 kHz / 10 kHz >100 / >155 / >155 °C

Chemical Resistance (Cured)

Property Condition / Test Result / Value Unit
Resistance to solvent vapors Acetone, Xylene, Methanol, Hexane, CS₂ Resistant
Water Absorption IEC 62, 23 °C / 0.5 h at 100 °C <5 / <10 mg
Resistance to liquids IEC 175, Ammonia (10%), Acetic acid (5%), NaOH (1%), HCl (10%), H₂SO₄ (30%), Iso-octane, Toluene, Transformer oil, BeckFluid 9902, Detergent solution <5–<50 mg

BERGQUIST microTIM mTIM 1028 Thermal Interface Coating High performance thermal management solution for nickel finished heat sinks, optical transceivers, and data center liquid cooling systems

BERGQUIST microTIM mTIM 1028 is purpose built for riding cage assemblies in servers, switches, and routers, interfacing with electroless nickel plated copper or aluminum heat sinks. It ensures stable operation in high power transceiver modules while also extending applicability to liquid cooling components, heat pipes, and fin based dissipative structures.

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