Electronic Control Unit (ECU) PCB encapsulation with protective potting compound for automotive electronics
Close-up of a technician using a dispensing machine to pot an automotive Electronic Control Unit (ECU) printed circuit board with black epoxy resin for protection.
Electronic Control Unit (ECU) PCB encapsulation with protective potting compound for automotive electronics
Close-up of a technician using a dispensing machine to pot an automotive Electronic Control Unit (ECU) printed circuit board with black epoxy resin for protection.

Industrial control circuit board encapsulation

Core Advantages

Potting Material

3M-DP270

Enclosure Material

POM plastic

Flammability Rating

UL94 HB

Application

Energy Storage Industry​

Consulting

+86 755 2828 2776

Business Hours (Mon.-Sat.)

9:00 - 18:00

Key Specifications & Technical Parameters

3M™ DP270 epoxy potting compound delivers exceptional protection for ECU PCBs in demanding environments. Ideal for applications requiring high reliability, including general industrial electronics, military and government systems, specialty vehicles, transportation infrastructure, and consumer goods. Its low-viscosity formulation ensures complete encapsulation, safeguarding against vibration, moisture, and thermal shock.

Basic Features

Adhesive Type

Epoxy

Bond Flexibility

Rigid

Color

Clear or Black

Typical Value

Full Cure Time

48 hr

Hardness

83 Shore D

Open Time

60 min @ 72 °F (22 °C

Selection Reference

Design Challenges

Noise Vibration & Harshness Control NVH

Smallest Saleable Unit

Pack

Performance Level

Good

Critical Value

Storage Temperature (Celsius)

22 °C

Storage Temperature (Fahrenheit)

72 Degree Fahrenheit

Work Life

60 min

Electrical Performance

Dielectric Constant
(ASTM D-150)

3.5 @ 1 KHz @ 23°C (73°F)

Dielectric Strength
(ASTM D-149)

850 volts/mil

Insulation Resistance

(.8 mm/.8 mm comb

pattern on FR-4)

Initial:3 x 1013 ohm
1000 hrs.:2 x 1011 ohm

Quality Specification

Flammability Rating

UL 94 HB

RoHS Status

Not applicable

REACH Status

REACH Unaffected

Quality Assurance

In the rapidly evolving landscape of heavy-duty vocational truck electrification, the reliability of electronic control unit (ECU) PCBA assemblies is paramount. The 3M™ DP270 epoxy potting compound delivers uncompromising quality assurance for these mission-critical applications, ensuring long-term performance under extreme operating conditions.

RoHS

UL

Low Viscosity

Non-Corrosive to Copper

Overlap Shear Strength (24°C)
0 PSI
Thermal Conductivity
0 W/m·K
Hardness
0 Shore D
UL Flammability Rating
0 HB

Product Details

Discover our material selection, process workflow, and quality control for encapsulated electronic products.

Product Overview

For demanding industrial control applications, this battery pack encapsulant combines a durable POM housing with high-performance 3M™ DP270 epoxy. The system provides superior electrical insulation, vibration dampening, and long-term environmental protection—ensuring reliable operation in harsh conditions.

Core Advantages

Technical Features

We use our self-developed, customized production process, strictly controlling every step from raw material inspection to finished product testing to ensure stable and reliable product quality.

1
POM Housing Preparation

Precision-molded POM enclosures are cleaned and inspected for dimensional accuracy and surface integrity.

2
PCB fab. +assembly+testing

After the PCB is fabricated, assembled, and has passed all foundational tests, it is securely positioned inside the housing, ensuring proper alignment for encapsulation.

3
Pre-Baking (Moisture Removal)

Assembled units are pre-baked in a controlled oven to remove any residual moisture before epoxy application.

4
3M™ DP270 Epoxy Mixing

The two-part epoxy is precisely mixed at a recommended ratio to ensure optimal curing and performance.

5
Vacuum Encapsulation

The mixed epoxy is dispensed under vacuum to eliminate air bubbles and achieve void-free protection.

6
Controlled Curing

Filled units are cured at a specified temperature profile to maximize adhesion and dielectric strength.

7
Visual & Dimensional Inspection

Cured assemblies are inspected for surface defects, epoxy coverage, and housing integrity.

8
Electrical & Environmental Testing

Final products undergo insulation resistance, high-voltage, and thermal shock tests to validate performance.

Leveraging stringent material selection and scientifically engineered processes—from PCB fabrication and SMT assembly to final encapsulation—our electronic devices deliver superior electrical performance and mechanical stability for even the most demanding applications.

High Dielectric Insulation

The 3M™ DP270 epoxy encapsulant provides excellent electrical isolation, preventing short circuits and ensuring safe operation in high-voltage industrial environments.

Multi-Layer Environmental Barrier

The combination of a sealed POM housing and void-free epoxy encapsulation offers robust protection against moisture, dust, chemicals, and thermal shock.

Integrated Vibration & Shock Damping

The encapsulating material absorbs mechanical stress and dampens vibrations, safeguarding sensitive components and solder joints from fatigue and failure.

Application Areas

We utilize advanced manufacturing processes to ensure that every PCB circuit board meets industrial-grade standards.

Industrial Automation & Control Systems

Encapsulated PCBs withstand dust, oil, and vibration in factory environments, ensuring long-term reliability for PLCs, motor drives, and robotic controllers.

Dust-resistant

Oil-proof

Vibration-damping

Automotive & EV Battery Management Systems

Provides high dielectric strength and thermal stability for battery monitoring circuits, protecting against moisture, electrolyte exposure, and mechanical shock.

High-voltage

Thermal-stable

Shock-resistant

Renewable Energy Systems (Solar & Wind)

Protects power conversion and monitoring electronics from extreme weather, UV exposure, and temperature cycling in outdoor installations and operations.

Weatherproof

UV-resistant

Wide-temperatur

Rail Transportation & Infrastructure

 Ensures fail-safe operation of signaling, tracking, and control electronics under continuous vibration, wide temperature ranges, and airborne contaminants.

Vibration-proof

Wide-range

Contaminant-sealed

Medical & Laboratory Equipment

Delivers biocompatible, chemical-resistant protection for sensitive control printed circuit boards used in diagnostic devices and sterilizable instruments.

Biocompatible

Chemical-resistant

Sterilizabl

Outdoor & Remote Monitoring Stations

Seals environmental sensors and communication modules against rain, snow, humidity, and pests, enabling maintenance-free operation in remote locations.

Hermetic

Humidity-proof

Maintenance-free

Project Story

A Canadian industrial automation leader needed a rugged encapsulation solution for motor drives deployed in harsh outdoor factories. Our POM-housed system with 3M™ DP270 epoxy eliminated field failures, ensuring reliable 24/7 operation under extreme dust, vibration, and humidity.

Environmental Protection
IP 0
Electrical Insulation
> 0 kV/mm
Thermal shock cycles
0 +

Heavy-duty vocational trucks

Encapsulated power-pack solutions

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