💡 Industrial 3020 (PFCP202) Phenolic Bakelite Specification

Our 3020 (PFCP202) Phenolic Paper Laminated Sheet is a time-tested electrical insulation composite (SRBP – Synthetic Resin Bonded Paper) manufactured by impregnating premium cellulose fiber paper with high-purity phenolic resin, consolidated under intensive thermal heat and high pressure.

Equivalent to the international NEMA Grade XX / XXP standard, this material exhibits elite dielectric properties in liquid dielectrics, making it the premier choice for oil-immersed transformers and heavy electrical switchgears.

As a volume-driven factory, Wuxi Shangjue Technology provides wholesale master panels along with precision custom CNC milling and punching based on your CAD drawings or physical reference samples.

⚙️ Section 1: Our B2B Core Advantages & Custom Capabilities

• Wholesale Full Master Sheets: We stock international regular sizes including 1020×2040 mm, 1220×2470 mm, and 1020×1220 mm. Thickness ranges dynamically from 1.6mm up to heavy-duty 50mm (or expanded from 0.5mm to 100mm for specific grades).

• Processing by Drawings & Samples: Phenolic paper laminates are excellent for stamping and machining. Send us your blueprints (.DXF, .DWG, or .STEP) or physical components, and our automated workshop will handle the profiling, drilling, and multi-axis routing seamlessly.

• Premium Oil-Immersed Reliability: Our 3020 sheets boast specialized chemical tolerance against transformer oil, ensuring zero structural degradation, zero leaching, and long-term mechanical stability inside power grid equipment.

🌟 Section 2: Certified Technical Properties & Highlights

• High Dielectric Strength in Oil: Engineered specifically for power frequency and high-voltage environments, delivering maximum electrical safety when submerged in transformer oil.

• Stable Ambient Insulation: Provides excellent electrical shielding and high dielectric resistance under normal humidity and air exposure conditions.

• Class E Thermal Resistance: Fully rated under continuous Class E thermal service envelopes, retaining rigid mechanical support and structural integrity without delamination.

• Strict Quality Compliance: Manufactured and tested in rigorous accordance with international standards IEC60893-3-4:2003, Chinese standard GB/T1303.6-2009, and JB/T8149.1—2000.

  🔍 Section 3: Technical Selection Guide (Phenolic Paper Grades Comparison)

  To help our global B2B procurement managers find the exact material variant, we supply the full spectrum of industrial SRBP grades:

  IEC Grade	China / NEMA Grade	Primary Processing Characteristics & Ideal Applications
  PFCP201	Grade 3022 / NEMA X	Mechanical Grade. Elite structural strength. Designed for Hot Punching components with basic insulation needs under regular humidity.
  PFCP202	Grade 3020 / NEMA XXP	High-Voltage Power Frequency. Elite dielectric strength in transformer oil and high air-insulation properties. Our core featured product.
  PFCP203	Grade 3021 / NEMA XP	Mechanical & Electrical Dual Grade. Well-balanced electrical reliability under normal ambient moisture. Fully optimized for Hot Punching.
  PFCP204	Electrical Grade	Electronic & Electrical Grade. Offers high-stability dielectric profiles under elevated humidity. Supports both Cold and Hot Stamping.
  PFCP205	Flame Retardant	Similar to PFCP204, but modified with low-flammability chemistry for enhanced fire protection.
  PFCP206	NEMA XXXP	High-Humidity Electrical Grade. Retains superior insulation resistance even after total immersion/submergence in water. Suited for Hot Punching.
  PFCP207	NEMA XPC	Cold Stamping Bakelite Sheet. Similar to PFCP201 but highly optimized for low-temperature punching and stamping without cracking. Low electrical specs.
  PFCP308	FR Mechanical	Similar to PFCP206, but upgraded with specialized low-combustion and flame-retardant properties.

  JB/T8149.1—2000 IEC60893-3-4 Technical parameters differ by standard. GB/T 1303. 6- 2009

  SRBP – Synthetic Resin Bonded Paper

  Serial number	Indicator name	Unit	Point
  			PFCP201	PFCP202	PFCP203	PFCP204	PFCP205	PFCP206	PFCP207	PFCP308
  				3020	3021
  			X	XXP	XP			XXXP	XPC
  1	Applicable standards	—	GB/T 1303.6—2009
  2	density	g/cm3	1.30～1.45
  3	Bending strength: ≥	MPa	135	120	120	75	75	85	80	85
  4	Apparent bending elastic modulus ≥	MPa	7000	7000	7000	7000	7000	7000	7000	7000
  5	Vertical laminate compressive strength: ≥	MPa	300	300	250	250	250	250	250	250
  6	Parallel lamination shear strength ≥	MPa	10	10	10	10	10	10	10	10
  7	Tensile strength: ≥	MPa	100	100	100	100	100	100	100	100
  8	Adhesion strength: ≥	N	3600	3600	3200	3200	3200	3200	3200	3200
  9	Power frequency dielectric loss factor Power frequency dielectric constant	—	— —	0.05 5.5	— —	— —	— —	— —	— —	— —
  10	1MHz dielectric loss factor, 1MHz dielectric constant	—	— —	— —	0.05 —	0.05 5.5	0.05 5.5	0.05 5.5	0.05 5.5	0.05 5.5
  11	Parallel laminate breakdown voltage, ≥ in oil at 90±2°C	kV	—	35	15	25	20	25	—	25
  12	Vertical laminate electrical strength: in oil at 90±2°C, ≥ plate thickness 0.5mm, plate thickness 1.0mm Plate thickness: 2.0mm, plate thickness: 3.0mm	kV/mm	— — — —	18.2 15.8 13.6 13.0	7.6 7.0 6.2 5.0	14.7 12.10 9.30 8.40	14.7 12.10 9.30 8.40	16.00 12.3 9.10 7.7	— — — —	16 12.3 9.10 7.7
  13	Insulation resistance after immersion ≥	Ω	—	—	5.0×107	5.0×107	1.0×109	1.0×109	—	1.0
  14	Water Absorption ≤ Plate thickness 0.5mm, plate thickness 1.0mm Plate thickness: 2.0mm, plate thickness: 5.0mm	mg	417 450 500 650	167 180 220 342	162 170 190 235	45 48 56 77	45 48 56 77	63 69 80 110	417 450 500 650	63 69 80 110
  15	Electroscracing resistance index	—	—	≥100	≥100	≥100	≥100	≥100	—	≥100
  16	Flammability	Level	—	—	—	—	V-1	—	—	V-1
  17	Temperature index	℃	120	120	120	120	120	120	120	120
  18	Color

  🎯 Section 4: B2B Industrial & Infrastructure Applications

  Our 3020 PFCP202 phenolic components are critical components integrated throughout global power networks:

  1. Oil-Immersed Transformers: Insulation barriers, terminal support blocks, coil structural clamping plates, and oil-channel structural rings.

  2. Heavy-Duty Switchgears: Power frequency terminal blocks, high-voltage mounting switch plates, phase separation boards, and insulating structural spacers.

  3. Rotating Machines: Generator stator insulating liners, electric motor slot insulation, terminal boxes, and carbon brush brackets.

  4. Instruments & Control Gear: Textile machinery structural parts, electrical tester assemblies, and household appliance insulating sub-panels.

     📩 Request a Wholesale Quote & DFM Blueprint Review

     Are you looking to source bulk NEMA Grade XX Phenolic Paper Boards or custom insulation parts from a verified Chinese manufacturer?

     📩 Contact Wuxi Shangjue Technology today! Send us your dimensions, required volume, or CAD schematics (.DXF/.DWG) to receive a transparent B2B wholesale quotation within 24 hours.