What is the mechanical strength of the insulator?

It has a cantilever strength of 4kN, tension strength of 38kN, and torsion strength of 800N.m.

How is the product quality controlled?

We perform 100% functional inspection on finished products with instructions uniformly followed.

What is the electrical withstand voltage?

The impulse withstand voltage is 125kV and the power frequency flashover wet voltage is 50kV.

Durable C4-125 IEC Approved Porcelain Insulator for Electrical Use

Name: Durable C4-125 IEC Approved Porcelain Insulator for Electrical Use
Brand: Jiangxi Johnson Electric Co., Ltd.
SKU: 1908467585

Jiangxi, ChinaJiangxi Johnson Electric Co., Ltd.

US$3.99-8.00

1,880 Pieces

Sample price:US$1.00/piece.Request sample

Product profile

Customization

Available

Application

High-voltage

Material

Porcelain

Model NO.

C4-125

Structure

Post Insulator

Type

A Type Insulator

Usage

High Voltage Power Transmission, Insulation, Electrical Installation

Connection Method

Trough Type

Certification

ISO9001

Color

White

MOQ

1000

Transport Package

Wooden Box

Trademark

PAC

Origin

China

HS Code

8546209090

Production Capacity

5000PCS/ Month

Key features

IEC Standard Compliance: C4-125 porcelain insulator meets IEC standards for high-voltage applications.

High Mechanical Strength: Features 38kN tension strength and 800N.m torsion strength for durability.

Superior Electrical Performance: Provides 125kV impulse withstand voltage and 50kV power frequency flashover.

Full Customization Support: Offers full, minor, and flexible customization from samples or designs.

100% Quality Inspection: Every finished product undergoes strict 100% functional inspection.

ISO9001 Certified Quality: Manufactured under ISO9001 certification ensuring consistent high quality.

Fast Lead Time: Average lead time is one month for both peak and off-peak seasons.

Direct Manufacturer Supply: Sold directly by manufacturer with three factories and local labs.

Company profile

Exhibition ExperienceExperienced TeamProduction Process VisualizationCustomization from Samples

Jiangxi Johnson Electric Co., Ltd.

Jiangxi, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 8 Years CertifiedNearest Port: Ningbo PortAverage Response Time: ≤3.30h CertifiedTerms of Payment: T/T, LC, D/P, etc.

AI-Powered supplier vetting

SummaryJiangxi Johnson Electric Company manufactures a broad range of electrical insulators and related fittings, with three production lines and 41–50 quality-control staff. It supports extensive customization, including customization from samples and designs, and follows uniform finished-product inspection instructions. However, the supplier reports no certification of management systems, no written procedures for service assessment, corrective actions, complaints, or quality assurance, and no overseas agents, warehouses, showrooms, or in-stock service. Its R&D evidence is limited: one year of R&D engineer experience is reported, with no new products in the past year, no ODM, 3D software design, SDK, or popular-brand OEM capability. Export sales account for 51%–70%, and the supplier has participated in one named offline trade show. Financial records are referenced for 2022–2024, but the provided slices do not establish financial strength.

Supplier typeThe supplier is an electrical-insulator manufacturer offering glass, porcelain, composite polymer insulators, transformer bushings, and end fittings. Its listed combined facilities include molding, drying, glazing, kiln, and related production equipment, supporting classification as a specialized manufacturing supplier.

CertificationsThe supplier reports no certification of supplier management systems. It also reports no written quality-assurance procedures or records, although finished-product inspection instructions are stated to be available and uniformly followed.

After-Sales capabilityThe supplier has no overseas agents or branches, overseas warehouse, showroom, inventory service, or written procedures and records for complaint handling, service assessment, or corrective and preventive actions. It does accept several quotation and payment terms and reports a one-month average lead time in both peak and off-season, but the documented after-sales infrastructure is deficient.

R&D capabilityInnovation evidence is weak: the supplier reports one year of total R&D-engineer experience, no new products in the past year, no 3D software design service, no ODM service, and no available SDK. It does offer several forms of design customization, but this does not establish strong product innovation capability.

Production capacityThe supplier operates three production lines, has 41–50 quality-control staff, and lists facilities covering molding, drying, glazing, kiln, and related processes. It also states that finished products are inspected under instructions that are uniformly followed; however, it reports no in-stock capacity and no valid manufacturing contract with associated subcontractors.

Customization capabilityThe supplier explicitly accepts customer designs and provides full, minor, flexible, sample-based, and design-based customization. This is direct evidence of broad customization capability, although 3D software design services are not provided.