By 2020: 8,000 m² production area, automated lines, constant-temperature lab, automatic full-inspection lines, annual capacity up to 15 million sets.
Jiaxing Sanjie Electrical Co., Ltd.
Company Profile
Custom PTC thermal modules — design to in-house mass production
About Us
Jiaxing Sanjie Electrical Co., Ltd.
Founded in 2017 with registered capital of RMB 10 million, we specialize in R&D and manufacturing of heater modules, PTC electric heaters, and wire harnesses. We mainly serve the heating appliance industry, guided by the core values of “quality focus, technology innovation, and dedicated service,” delivering safer and more practical products.
Putting customer needs first, we continue to innovate while expanding in heating appliances. We supply quality products to well-known brands, earn trust across the industry, and build a strong reputation in the heater sector.
Our Goal: Become the most trusted core supplier in the heating appliance industry.
Our Philosophy: “Integrity first, quality foremost, wholehearted service.” With strong technical capability, we ensure products that are safe and reliable.
Our Promise: No shipment without full inspection. Strict production to national standards.
Custom Capability
We partner with OEMs and system integrators on custom PTC thermal modules: joint design support, in-house manufacturing, and a clear path from prototype to mass production.
Partner Customization
We co-develop PTC heating elements and thermal modules to your duty cycle, drawings, or application needs—not only off-the-shelf standard parts.
In-House Mass Production
With our own workshop and automated lines, approved custom designs move directly into pilot runs and volume production for more controllable lead time and quality.
Design to Delivery
From concept discussion and sampling to performance testing and finished packaging, we help partners embed heating parts into complete products or assemblies.
- 01Requirements
Duty cycle, power, size, timeline
- 02Joint Design
Concept and structure together
- 03Sampling
Prototype and performance tests
- 04Mass Production
In-house volume supply
Application Focus
- Appliances & heating: bathroom heaters, fan heaters, air conditioners, robot vacuums, clothes dryers, and related modules
- Industrial & equipment: temperature control, anti-condensation, and custom heating parts for devices
- New energy roadmap: custom parts for EV cabin heating, battery heating, and thermal-management zones (under continuous development)
For drawing review, sampling, or volume supply, please contact us with your requirements.
Products
Bathroom Heater · Fan Heater · Pet Room
Live (energized) PTC heaters
For bathroom heaters, fan heaters, dryers, and similar products
Air Conditioner · Robot Vacuum · Clothes Dryer
Insulated PTC heaters
For air conditioners, electric clothes dryers, robot vacuums, and similar products
Clients
Certificates
Patents
Production Workshop
Live PTC Production Line
Automatic Stacking Line
Automation gradually replaces manual work for gluing and stacking, cutting labor cost, raising efficiency, and improving quality.
Tunnel Furnace
High-temperature constant tunnel furnaces improve quality, reliability, and production efficiency.
Wire Processing Line
To reduce customer process steps, we provide wire processing and solve harness machining needs.
Aluminum Strip Line
In-house aluminum strip production shortens lead time and improves product quality.
Insulated PTC Production Line
Auto Glue & Stacking
More even glue, lower power variance, better consistency. Higher efficiency and stability than manual work, with lower cost and stronger competitiveness.
Auto Die Threading
Precise length positioning with less manual work, ensuring consistency, higher efficiency, and better yield.
Tube Pressing Machine
Pressure equipment with dedicated molds delivers higher precision, stability, efficiency, and quality.
Assembly Line
More automation raises efficiency and quality, lowers cost and labor use, and improves production safety.
Test Equipment
Facilities
Laboratory
Test and verify product performance; provide data for new product R&D and for products entering mass production.
Finished Goods Warehouse
Customer-based product classification to avoid mis-shipment and improve warehouse throughput.
Sample Room
Customer sealed samples stored for traceability and product testing support.
Process Flow
- Aluminum strip
- Heat-sink assembly
- Glue coating
- Auto stacking
- Fixturing
- Tunnel curing
- Performance test
- Marking
- Harness prep
- Terminal crimping
- Harness assembly
- Packaging
Systems & Compliance
ISO 9001
To standardize production, R&D, and sales, control risk, and improve returns, we obtained ISO 9001 certification in 2016.
We continue to strengthen management, raise product and service satisfaction, pursue zero defects, and keep quality at a high level.
RoHS
The EU RoHS Directive (2003) restricts hazardous substances in electrical and electronic equipment. Since 1 July 2006, six categories of hazardous substances have been banned in products entering the EU market.
REACH SVHC
REACH aims to protect human health and the environment and improve chemical safety and transparency. Chemicals imported into or produced in Europe must go through registration, evaluation, authorization, and restriction so that composition is clearly identified and safety is ensured.
Contact Us
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Email xpxyzm@163.com
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Sales Hotline +86 (573) 8328-7912 +86 18857298199
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Address
No. 401 Qingfeng Street, Wangdian Town, Xiuzhou District, Jiaxing, Zhejiang, China
Custom Inquiry
Submit to open your email client and send to our sales inbox (or call the hotline directly).