CNC Machined C11000 / C10200 Copper Contactor Terminal Block with 0.02mm Flatness and 5-10 Micron Tin Plating for Reliable Electrical Power Connections
Price:
Negotiable
MOQ:
Negotiable
Delivery Time:
Negotiable
Product Description
CNC Machined Copper Contactor Terminal Block - Custom Electrical Power Connection Components
Product Overview
A contactor terminal block is a critical component that appears simple but requires precise manufacturing to ensure reliable performance. These copper terminals carry significant current and must maintain low contact resistance through thousands of make-break cycles.
We machine contactor terminal blocks from C11000 ETP copper and C10200 OFHC copper, maintaining terminal contact surface flatness to 0.02mm and bolt hole position to ±0.01mm for even contact pressure. Standard tin plating (5-10 micron) provides oxidation protection, with nickel underplating available for harsh environments and silver plating for maximum conductivity.
Key Features
- C11000 / C10200 Copper: 101% IACS (C11000) or 101.5% IACS (C10200 OFHC) conductivity for minimal voltage drop
- Contact Surface Flatness: 0.02mm across terminal mating surface ensures even contact pressure
- Bolt Hole Precision: ±0.01mm positional accuracy for consistent alignment
- Tin Plating Standard: 5-10 micron plating prevents oxidation and maintains stable contact resistance
- Multi-Terminal Configurations: 1-pole through 8-pole blocks with custom spacing and mounting features
Technical Specifications
| Product Name | CNC Machined Copper Contactor Terminal Block |
|---|---|
| Material Options | Copper C11000 (ETP), Copper C10200 (OFHC) |
| Conductivity | 101% IACS (C11000), 101.5% IACS (C10200) |
| Tolerance | ±0.01mm (bolt holes, contact surfaces), 0.02mm (surface flatness) |
| Current Rating | Custom per design (typically 20A to 630A per pole) |
| Surface Treatment | Tin Plating, Nickel Plating, Silver Plating, Passivation |
| Certifications | ISO 9001:2015, IATF 16949, RoHS, CE, REACH |
| Lead Time - Prototype | 3-7 days |
| Lead Time - Production | 7-15 days |
| MOQ | 1 piece (prototype), 100+ (production) |
| Origin | Dongguan, China |
Applications
- Motor Control: Motor starter terminal blocks, contactor power connection terminals, soft starter input/output terminals
- Power Distribution: Circuit breaker terminal blocks, load center connection terminals, power distribution panel bus connectors
- Industrial Controls: PLC power terminals, relay module terminal blocks, industrial automation power connection points
- Heating Systems: Electric heater terminal blocks, thermal cutoff contactor terminals, industrial heating element connection blocks
- Lighting Controls: Lighting contactor terminal blocks, dimmer panel power terminals, stadium lighting power connection blocks
- EV Charging: EV charger contactor terminal blocks, charging station power distribution terminals, battery management system connection blocks
Manufacturing Process
- DFM Review: Terminal block geometry review, current rating verification, bolt specification confirmation, and plating selection
- Material Selection: C11000 ETP standard or C10200 OFHC for maximum conductivity with full material traceability
- Precision Machining: CNC milling for terminal block bodies, precision drilling, chamfering and deburring
- Quality Inspection: CMM dimensional verification, surface flatness measurement, bolt hole position check
- Surface Treatment: Tin plating standard (5-10 micron) with XRF plating thickness verification
- Testing & Packaging: Contact resistance testing available, anti-corrosion packaging with complete documentation
Why Choose Our Precision Manufacturing
- Copper Machining Optimized: Specialized chip breaker tooling and coolant strategies developed over 20+ years
- Flatness Verification: Every production batch measured with precision straightedge and feeler gauge
- Plating Thickness Guaranteed: Tin plating 5-10 micron verified with X-ray fluorescence thickness testing
- Contact Resistance Testing: Milliohm-level testing across bolted terminal joints available on request
- Modular Design Support: Custom multi-pole terminal blocks with interlocking features
- Fast Prototype to Production: 3-7 days for copper machined prototypes, 7-15 days for production with plating
Frequently Asked Questions
What is your minimum order quantity?
1 piece for contactor development prototypes. Production MOQ is typically 100 pieces with volume pricing at 500+.
Can you achieve specific current ratings?
Yes. We verify copper cross-section against your target current rating and allowable temperature rise per IEC 60947 standards.
What copper grade should I use?
C11000 ETP is standard and sufficient for most contactor applications at 101% IACS. C10200 OFHC (101.5% IACS) is worth the premium for high-current applications.
Do you provide tin plating?
Yes. Tin plating 5-10 micron is standard for contactor terminals. Thickness verified with XRF testing, documentation included.
What is the typical lead time?
Prototype: 3-7 days. Small batch: 7-15 days. Mass production: 15-25 days depending on terminal block complexity and plating.
Can you test contact resistance?
Yes. Milliohm-level contact resistance testing across bolted terminal joints, with certified test reports for safety certification submissions.
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Sinbo Precision Mechanical Co., Ltd.
Location
Factory 1: No.7,Mingzhu 2 road,Shebei,Huangjiang,Dongguan,Guangdong,China 523752 Factory 2: No.19,Mingzhu 1 road,Shebei,Huangjiang,Dongguan,Guangdong,China 523752
Contact Person
Yang