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Professional Grade

Precision Wire
Harness Solutions

Engineered for reliability in the most demanding applications

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Custom Configurations
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Rapid Prototyping
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Tested Reliability
Precision Wire Harness Request Quote
Solutions

Custom Wire Harness for Every Industry

From single prototypes to high-volume production — engineered to your exact specifications

Automotive Wire Harness

Automotive

ECU connections, sensor wiring, infotainment systems, ADAS modules

AEC-Q100
Industrial Wire Harness

Industrial

Control panels, motor wiring, PLC connections, heavy machinery

IP67 Rated
Consumer Electronics Wire Harness

Consumer Electronics

Smart home devices, wearables, gaming systems, audio equipment

RoHS Compliant
Medical Wire Harness

Medical

Diagnostic equipment, patient monitors, imaging systems, surgical tools

ISO 13485
Telecom Wire Harness

Telecom

Base station wiring, server rack installations, network infrastructure

High Frequency
Home Appliance Wire Harness

Home Appliance

White goods, kitchen appliances, HVAC systems, smart home integration

UL Certified
Discuss Your Custom Requirements
Why Choose Us

Why Choose Our Wire Harness Solutions

Three core strengths that set our wire harness solutions apart

01

Certified Excellence

IPC/WHMA-A-620 Class 3 certified manufacturing with full batch traceability from raw material to final delivery. Every harness meets rigorous industry standards.

IPC/WHMA-A-620
02

Advanced Engineering

3D modeling and DFM analysis for optimal designs — our engineers refine your harness before production begins. Prototype to production with zero design surprises.

DFM / 3D Modeling
03

Rapid Turnaround

Prototype to production in as little as 72 hours. Flexible capacity for small batches and high-volume runs — no minimum order constraints.

72h Prototyping
Specifications

Premium Wire Harness Features

Comprehensive capabilities to meet your exact requirements

Technical Specifications

Wire Gauge AWG 40–8 (from ultra-fine to heavy-duty)
Circuit Count 1–256 circuits, custom multi-branch assemblies
Length Tolerance ±0.2 mm for precision applications
Withstand Voltage 500V AC / 700V DC minimum
Insulation Resistance 100 MΩ min at 500V DC
Temperature Range -40°C to +200°C (high-temp options available)
Wire Types UL1007, UL1015, UL1569, UL3271, high-temp, shielded, Teflon
Connectors Molex, JST, TE, Amphenol, Hirose, JAE, custom overmolded
Finishes Gold, nickel, tin, silver plating per specification
Protection Shielding, overbraiding, heat shrink, potting, overmolding

Why Topfast Stands Out

Capability Other Suppliers Topfast
Engineering Support Basic DFM only 3D modeling, DFM/DFA, design optimization
Prototyping Speed 5–7 days standard 72-hour rush available
MOQ Flexibility Minimum 100 pieces 1 piece for prototypes
Certifications Basic UL only IPC/WHMA-A-620 Class 3, ISO 13485, RoHS/REACH
Quality Inspection Spot check only 100% continuity testing, full batch traceability
Volume Scaling Requires new tooling Prototype → production in same facility
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Questions

Frequently Asked Questions

Everything you need to know about our wire harness manufacturing

What certifications do your wire harnesses have?

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Our wire harnesses meet IPC/WHMA-A-620 Class 3 standards with full compliance to UL, CSA, and RoHS certifications. Complete documentation is provided with every shipment. For medical applications, we also hold ISO 13485 certification.

What is your production lead time?

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Standard production takes 2-3 weeks from design approval. Rush services are available with prototype delivery in as little as 72 hours. Complex custom designs may require additional engineering time — we'll provide a clear timeline upfront.

What is your minimum order quantity?

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No MOQ for prototypes — we support single-piece orders for testing and validation. Small batch orders start at 50+ units, with volume discounts kicking in at 1,000 units and above.

How do you ensure product quality?

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Our 5-stage quality process includes: 1) Incoming material inspection, 2) In-process crimp and continuity testing, 3) Automated optical inspection, 4) 100% electrical continuity testing, 5) Final random sampling with pull-force verification.

What customization options are available?

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We customize wire types, gauge, connectors, color coding, harness lengths, shielding, overmolding, and packaging. Our engineers provide free DFM feedback to optimize your design before production begins.

What shipping methods do you offer?

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We provide ESD-safe packaging with moisture barrier protection. Standard shipping via DHL, FedEx, and UPS. Climate-controlled shipping and multi-destination deliveries are available for large orders.

Still have questions? Contact our engineering team

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