Industrial Ceramic Screw Terminal Blocks | High-Temperature Wire Connectors
Steatite ceramic screw terminal blocks engineered for high-temperature electrical wiring up to 500°C. Built with unglazed C221 steatite ceramic bodies, nickel-plated brass current bars, and zinc-plated steel screws. Designed for direct integration into industrial heating equipment, commercial appliances, and high-wattage lighting systems where standard polymer connectors undergo thermal degradation.
Standard Configurations: 1-pole to 4-pole terminal options.
Electrical Ratings: Up to 450V / 41A (model dependent).
Material Compliance: RoHS and REACH compliant raw material processing.
Engineering Documentation: Complete documentation packages including downloadable PDF Technical Data Sheets (TDS), 2D/3D CAD models, and Mill Test Reports (MTR) available for immediate integration into vendor approval workflows.
Technical Specifications
|
Model / Poles |
Current Rating |
Voltage Rating |
Wire Capacity (Max) |
Body Material |
Operating Temp |
|
CTB-01 (1-Way) |
15A - 30A |
450V |
2.5mm² - 4.0mm² |
C221 Steatite |
Up to 425°C |
|
CTB-02 (2-Way) |
15A - 40A |
450V |
4.0mm² - 6.0mm² |
C221 Steatite |
Up to 425°C |
|
CTB-03 (3-Way) |
30A - 50A |
450V |
6.0mm² - 10.0mm² |
C221 Steatite |
Up to 425°C |
Dielectric Strength: Greater than 2.5 kV / mm
Recommended Screw Torque: 0.5 Nm to 1.2 Nm (calibrated tightening prevents thread damage and ceramic micro-cracking).
Material & Manufacturing Standards
1. Ceramic Body (C221 Steatite)
Formulated from high-purity magnesium silicate (MgSiO3).
Processed via dry-pressing and tunnel kiln firing at 1300°C to achieve low porosity and high mechanical impact strength.
Resistant to thermal shock, chemical corrosion, and high-voltage tracking.
2. Conductive Inserts
Machined from solid brass rod stock (CuZn39Pb3), avoiding internal porosity flaws typical of low-cost castings.
Electroplated with 3um to 5um bright nickel coating to prevent oxidation and galvanic corrosion at elevated operational temperatures.
3. Fasteners
Machine-threaded steel screws treated with blue-white zinc plating.
Threads are rolled rather than cut to increase tensile strength and prevent stripping during high-torque assembly.
Application Guide
These terminal blocks are deployed where organic plastics (PA66, PC) experience embrittlement, structural deformation, or outgassing.
Industrial Electric Furnaces & Kilns: Internal wiring harness connections near heating elements.
Commercial Kitchen Equipment: Commercial ovens, deep fryers, and industrial food dehydrators.
Lighting Systems: High-intensity discharge (HID) fixtures and quartz halogen lamp internal connections.
Laboratory Apparatus: High-temperature test chambers and analytical heating units.
Supplier Evaluation & Quality Control
Dimensional Inspection: CMM (Coordinate Measuring Machine) verification of mounting hole pitches and insert alignments.
Torque Testing: Automated torque-meter testing on production batches to verify screw thread integrity and pull-out resistance.
High-Voltage Breakdown Test: 100% dielectric withstand testing performed on production lines prior to packaging.
Traceability: Laser-etched batch numbers on master cartons mapping directly back to raw material mill test reports (MTR).
Procurement & Ordering Information
Minimum Order Quantity (MOQ): 1,000 pieces per specification (negotiable for standard catalog items).
Packaging: Industrial bulk packaging in export-grade corrugated cartons with individual corrugated dividers to prevent ceramic chipping during transit.
Sample Availability: Engineering samples available for validation testing within 3 to 5 business days.
Frequently Asked Questions
Q: What is the maximum continuous working temperature for C221 steatite ceramic blocks?
A: Steatite ceramic bodies withstand continuous operational temperatures up to 425°C to 500°C without structural deformation or loss of electrical insulation properties.
Q: Can these blocks be used in direct contact with moisture or liquids?
A: The ceramic body is non-porous and moisture-resistant; however, the open screw terminal design is unsealed. Applications exposed to direct moisture require placement inside an IP-rated enclosure.
Q: What precautions should be taken during screw tightening?
A: Use a calibrated torque screwdriver matching the specified torque limits (0.5 Nm to 1.2 Nm). Exceeding torque thresholds may crack the ceramic housing or strip the internal brass threads.
Q: Are custom dimensions or specialized terminal configurations available?
A: OEM manufacturing services accommodate custom ceramic body dimensions, specific hole spacings, and multi-pole configurations based on engineering CAD drawings.
Request a Technical Quote or Sample
To request engineering drawings, material test reports, or volume pricing for your project, please contact our technical sales team:
Direct Engineering Sales Email: 547400318@qq.com
Required RFQ Details: Part number, annual volume projection, target delivery schedule, and destination port.
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