Key performance comparison
-Heat resistance level
-GPO-3: F-grade (155 ℃), long-term 120-130 ℃
-Epoxy: FR4/G10 Grade F (155-180 ℃); 3240 Grade B (130 ℃)
-Arc/Leakage Resistance (CTI)
-GPO-3: Excellent, arc resistance>180s, CTI ≥ 600V (strong point)
-Epoxy: Generally, CTI is about 200-400V, and its arc resistance is weaker than GPO-3
-Mechanical strength
-GPO-3: Moderate, slightly brittle, poor impact, prone to edge breakage
-Epoxy: high, good toughness, strong bending/tensile/impact resistance, not easy to crack
-Flame retardant
- GPO-3：UL94 V-0, Comes with flame retardant and low smoke properties
-Epoxy: FR4 is mostly V-0 (containing bromine); G10/3240 non flame retardant
-Moisture absorption/moisture resistance
-GPO-3: Insulation Stability under High Humidity (Polyester Characteristics)
-Epoxy: slightly higher moisture absorption rate, more significant decrease in long-term high humidity insulation
-Processing capability
-GPO-3: Easy to punch and drill, not prone to delamination, suitable for molded parts
-Epoxy: Drilling is prone to heating and delamination, and punching and cutting are prone to cracking, making it suitable for precision machining
-Price
-GPO-3: Low (polyester+fiberglass felt)
-Epoxy: relatively high (epoxy+electronic grade glass cloth)
Typical use
-GPO-3 Main Features: Medium Voltage Switches, Circuit Breakers, Arc Extinguishers, Arc Separations, Busbar Insulation, Motor Slot Wedges
-Keywords: arc resistance, flame retardancy, affordability, high humidity insulation stability
-Epoxy (FR4/G10/3240) specializes in PCB, precision insulation components, structural supports, and transformer skeletons
-Keywords: high strength, stable size, good heat resistance, high processing accuracy
