A786 Aramid Insulation Paper

A786 Aramid Insulation Paper

UL Certification No.: E509207

Aratech® A786 is a high-temperature calendered aramid electrical insulation paper engineered to meet the demands of modern, power-dense electrical systems. Its ability to perform reliably at 200°C makes it a trusted solution for building robust and long-lasting Class H and C insulation systems.

In applications where space is limited and performance is critical, A786 provides the exceptional thermal and dielectric stability required to increase power output without increasing equipment size. It's the frist insulation choice formore compact and efficient systems like new energy EV traction motors, traction transformers, wind power generators and power generators.

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Enabling Next-Generation Power Density

Aratech® A786 Core Performance Features

A786 provides the design freedom and performance headroom that engineers need to push the boundaries of electrical innovation while ensuring long-term operational integrity and safety.

Stable Dielectric Performance

Delivers a stable and high-performance insulation layer that safeguards equipment against partial discharge and electrical stress.

Exceptional Thermal Stability

Engineered for continuous operation at 200°C, guaranteeing long-term performance and reliability in high-heat environments

Unmatched mechanical stability

Offers exceptional tear and tensile strength to resist damage from severe vibration, mechanical shock, and the stresses of continuous.

Superior Flexibility

Combines excellent pliability with high resilience, allowing the paper to conform to complex shapes without fracturing.

Excellent chemical compatibility

Its excellent compatibility with insulating varnishes and oils to create a monolithic insulation structure for enhanced durability.

Fire-Retardant Properties

Offers a fundamental safety advantage by resisting combustion and limiting the spread of fire in case of a system fault.

Where It Works

Main Application Areas

A786 is suitable for a wide range of applications requiring sheet-type electrical insulation materials. It is used for slot, turn-to-turn, layer-to-layer, and end insulation in various electrical machines, including motors, generators, and transformers—notably in EV drive motors, traction motors, and wind turbine motors.

Transformers Insulation

Motors Insulation

Generator Insulation

EV Motor Insulation

Technical Data Snapshot

Items	Unit	TypicalValue									TestMethods
NominalThickness	mm	0.08	0.13	0.18	0.22	0.25	0.3	0.38	0.51	0.76	/
NominalThickness	mil	3.0	5.0	7.0	8.5	10	12	15	20	30	/
TypicalThickness	mm	0.084	0.127	0.180	0.22	0.262	0.31	0.398	0.515	0.784	GB/T451.3
BasisWeight	g/m²	80	125	185	230	270	316	410	535	820	GB/T451.2
Density	g/m³	0.95	0.98	1.03	1.05	1.03	1.02	1.03	1.03	1.04	GB/T451.3
DielectricStrength	kV/mm	22	25	28	32	32	32	31	32	28	GB/T1408.1
DielectricConstant	—	1.6	2.4	2.6	2.6	2.7	2.9	3.2	3.4	3.7	GB/T1409
Dielectric Loss Factor	x 10⁻³	5	6	6	6	6	7	7	7	7	GB/T1409
TensileStrength	MD (N/cm)	85	140	230	295	340	380	460	660	850	GB/T12914
TensileStrength	CD (N/cm)	40.0	70.0	125.0	160	190	200	240	400	635	GB/T12914
Elongation	MD (%)	8.0	11.5	11.5	12	13	11	12	15	14	GB/T12914
Elongation	CD (%)	7.0	9.5	9.5	10.5	10.5	10	10	11	10	GB/T12914
ElmendorfTearStr.	MD.(N)	1.2	2.3	4.1	4.5	5.5	6	8	10.5	16.5	GB/T455
ElmendorfTearStr.	CD (N)	2.0	4.0	6.5	7.5	8.5	11	14.5	N/A	N/A	GB/T455

Notes:

MD: Longitudinal direction
CD: Horizontal direction
Fast boost mode with φ6mm cylindrical electrode.
The test frequency is 50Hz.
The data in the sheet are typical and can not be used as the technical specification. Unless otherwise stated, all data were measured under “Standard Conditions” (with the temperature of 23℃ and the relative humidity of 50% RH).

Global Leader in Paper-Based Electrical Insulation

Why Choose Us

Partnering with Times Huaxian means more than sourcing reliable materials—it means securing a future-ready supply chain and accessing flexible solutions. We combine industrial scale with scientific rigor to support global distributors, OEMs, and service providers in building reliable electrical futures.

Certified Reliability

By using advanced online quality monitoring, we eliminate the human error and variability inherent in older production methods, ensuring that every roll performs exactly as specified.

Competitive Value

By partnering with us, you can integrate world-class, UL-certified insulation into your products at a significantly more competitive price point, directly improving your bill of materials (BOM)

Reliable Global Supply

we offer a more direct, transparent, and stable supply of critical materials. This allows you to reduce costly buffer inventory and insulate your operations from global supply shocks.