PFCP203 phenolic paper laminate sheet (classified as IEC 60893-3-4 PF CP 203 and equivalent to DIN 7735 Hp 2061.5) is a high-grade electrical insulating composite manufactured from bleached or unbleached cellulose paper impregnated with modified phenolic resin. Specifically formulated for excellent dielectric strength, high insulation resistance under humid conditions, and superior punching workability, PFCP203 is widely specified for low- and medium-voltage switchgear components, insulating washers, terminal boards, and punched transformer barriers.
This dedicated technical reference from RDS Composite provides the complete Technical Data Sheet (TDS) for Grade PFCP203, detailed warm and cold punching processing guidelines, and a direct engineering comparison against other PFCP paper laminate grades.
Technical Data Sheet (TDS): IEC 60893-3-4 PF CP 203 Specifications
The following properties represent nominal laboratory test values for standard PFCP203 sheets tested under IEC and ISO standardized conditions:
| Engineering Property | Test Standard / Method | PFCP203 Specified Value |
|---|---|---|
| Density | ISO 1183 / IEC 60893-2 | 1.30 – 1.40 g/cm³ |
| Flexural Strength (Perpendicular to Laminations) | ISO 178 (≥ 1.6mm thickness) | ≥ 135 MPa |
| Tensile Strength | ISO 527 | ≥ 120 MPa |
| Dielectric Strength (90°C Oil, 2mm Sheet) | IEC 60243-1 (Perpendicular) | ≥ 10.0 kV/mm |
| Parallel Voltage Breakdown (90°C Oil) | IEC 60243-1 (25mm gap) | ≥ 20 kV |
| Insulation Resistance (After 24h Immersion) | IEC 60167 | ≥ 10⁸ Ω (100 MΩ) |
| Thermal Limit (Continuous) | IEC 60216 Thermal Index | 120°C (Class E) |
| Water Absorption (24h at 23°C, 3mm) | ISO 62 / Method 1 | ≤ 220 mg (approx. < 1.5%) |
Punching & Die Stamping Processing Guidelines
PFCP203 is specifically plasticized and formulated for clean blanking, stamping, and punching operations without edge delamination, cracking, or severe micro-fracturing around hole perimeters.
1. Cold vs. Hot Punching Temperature Windows
- Thin Sheets (≤ 1.5 mm): Can be cold-punched at ambient temperature (20°C–25°C) using sharp steel dies with proper clearance.
- Medium to Thick Sheets (1.6 mm – 3.2 mm): Pre-heating is mandatory. Uniformly heat the PFCP203 sheet to 100°C – 120°C for 3 to 5 minutes prior to die stroke. Overheating above 140°C can cause resin darkening and localized thermal deformation, while punching below 80°C risks edge cracking.
2. Tooling Clearance & Die Design Rules
- Die Clearance: Punch-to-die clearance should be kept tighter than standard metal stamping, typically 2% to 3% of sheet thickness per side, to prevent burr formation.
- Hole Diameter Limit: Minimum punched hole diameters should not be smaller than the nominal sheet thickness ($D \ge T$). For holes smaller than sheet thickness, drilling is recommended.
- Hole Spacing: Maintain a minimum distance between hole edges and sheet margins equal to at least twice the sheet thickness ($S \ge 2T$).
Grade Comparison: PFCP203 vs. Other Phenolic Paper Grades
Selecting the correct paper-phenolic designation under IEC 60893 avoids field failures or unnecessary material expense:
| IEC 60893 Grade | DIN 7735 Equivalent | Key Engineering Characteristics | Primary Application Focus |
|---|---|---|---|
| PF CP 201 | Hp 2061 | General mechanical grade; basic electrical properties; economic choice. | Low-voltage structural supports, mechanical backing plates. |
| PF CP 202 | Hp 2061.3 | Improved mechanical strength and good electrical properties in oil. | Oil-filled transformer terminal boards, structural barriers. |
| PF CP 203 (G10/G11 Paper) | Hp 2061.5 | High electrical insulation under humidity; optimized resin plasticization for hot punching. | Precision punched washers, switchgear barriers, terminal strips. |
Order Factory-Direct PFCP203 Sheets or Stamped Components
RDS Composite supplies raw PFCP203 paper phenolic sheets and high-speed punched insulating washers produced to your exact dimensional drawings and tolerances.
Request Quote / Contact Application Engineering