Ceramic Terminal Blocks
Material Science & Manufacturing Process Control
Thermal and electrical stability in high-heat zones depends strictly on raw material purity and sintering dynamics.
Steatite C221 Formulation
Composed of high-purity magnesium silicate. It provides superior volume resistivity at elevated temperatures, high mechanical bending strength, and minimal dielectric loss compared to standard electrical porcelain.
Compaction & Forming
Granulated ceramic powder is processed via 100-ton multi-axis hydraulic presses to maintain uniform green-body density, eliminating internal micro-voids that lead to thermal shock fracturing.
Continuous Tunnel Kiln Sintering
Fired in automated tunnel kilns at temperatures exceeding 1350°C for a 24-hour cycle, achieving complete vitrification with a water absorption rate of <0.1% for absolute chemical inertness.
Galvanic Protection
Conductive inserts utilize high-conductivity brass or steel finished with a 3 to 5 um nickel or zinc electroplating layer, preventing high-temperature oxidation and galvanic corrosion when terminating copper or nickel lead wires.
-
![Ceramic Terminal Blocks]()
Ceramic Terminal BlocksCeramic terminal blocks provide secure wire-to-wire connections in environments where standard thermoplastic housings (PA66, PC) fail due to extreme heat or fire hazards. Molded from steatite or...read more -
![Custom Ceramic Terminal Blocks]()
Custom Ceramic Terminal BlocksEngineered for extreme thermal environments (> 600°C), our custom ceramic terminal blocks are manufactured via dry-pressing or isostatic pressing using high-purity steatite (C221) and alumina...read more -
![Ceramic Screw Terminal Blocks]()
Ceramic Screw Terminal BlocksSteatite 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...read more -
![Ceramic Barrier Terminal Blocks]()
Ceramic Barrier Terminal BlocksCeramic barrier terminal blocks provide reliable wire-to-wire connections in environments where standard thermoplastic blocks (PA66, PC) degrade, warp, or carbonize.read more -
![Alumina Ceramic Terminal Blocks]()
Alumina Ceramic Terminal BlocksAlumina ceramic terminal blocks provide stable electrical insulation and mechanical wire retention in thermal and electrical environments exceeding the limits of standard engineering plastics...read more -
![Porcelain Terminal Blocks]()
Porcelain Terminal BlocksIndustrial Porcelain Terminal Blocks are engineered for heavy-duty electrical circuits exposed to continuous thermal stress where standard thermoplastic alternatives (such as PA66 or...read more
Technical Quick-Spec Matrix
|
Engineering Parameter |
Technical Specification |
|
Housing Material |
Steatite Porcelain (Grade C221, Magnesium Silicate - Mg3Si4O10(OH)2) |
|
Continuous Thermal Rating |
-40°C to 350°C (Standard) / Up to 600°C-800°C (Special Alloy Build) |
|
Electrical Ratings |
250V - 750V AC |
|
Conductor Accommodation |
0.5 mm² to 25.0 mm² (20 AWG to 4 AWG) |
|
Dielectric Strength |
Greater than 15 kV/mm |
Standard Product Line Specifications
Engineered for OEM industrial heating systems, furnaces, and high-wattage electrical panel building. Custom hole pitch, extended creepage barriers, and multi-tier layouts are reviewed upon engineering drawing submission.
|
Catalog Model |
Pole Config |
Rated Voltage |
Rated Current |
Wire Gauge Capacity |
Max Operating Temp |
Metal Insert & Hardware |
|
CTB-01-10A |
1P, 2P, 3P |
450V |
10A |
0.5 - 2.5 mm² (20-14 AWG) |
350°C |
Nickel-Plated Brass / Steel Screw |
|
CTB-02-15A |
1P, 2P, 3P |
450V |
15A |
1.0 - 4.0 mm² (18-12 AWG) |
350°C |
Nickel-Plated Brass / Steel Screw |
|
CTB-03-30A |
1P, 2P, 3P |
750V |
30A |
2.5 - 6.0 mm² (14-10 AWG) |
450°C |
Nickel-Plated Brass / Steel Screw |
|
CTB-04-50A |
1P, 2P, 3P |
750V |
50A |
4.0 - 10.0 mm² (12-8 AWG) |
500°C |
High-Temp Alloy / Steel Screw |
Application Engineering & Selection Guide
Selecting the incorrect terminal block results in brittle failures from thermal shock or terminal loosening under mechanical vibration.
Industrial Furnaces and Kilns
Operating under continuous thermal exposure exceeding 300°C requires the structural resilience of Steatite C221 bodies paired with high-temperature steel screws to prevent fastener degradation.
Commercial Heating Units
Facing rapid thermal shock cycling, these applications demand fully vitrified, low-porosity ceramic blocks that resist micro-cracking during abrupt temperature fluctuations.
High-Wattage Lighting Fixtures
Constrained by tight spatial limits and persistent thermal retention, these setups benefit from miniature 1-pole and 2-pole modular ceramic terminal blocks designed for compact integration.
Quality Assurance & Compliance Testing
Each production batch undergoes testing protocols prior to factory release:
Dielectric Withstand Voltage
Tested at 2500V AC for 60 seconds with zero insulation breakdown or leakage current.
Thermal Shock Resistance
Sample lots are cycled rapidly from ambient temperature to 300°C in circulating air ovens to inspect for structural integrity.
Thread Pull & Torque Bench Testing
Terminal screws are evaluated on digital torque benches to verify thread integrity and prevent stripping under high fastening loads.
Dimensional Tolerance
Terminal pitch and mounting hole spacing are monitored via optical projection systems maintaining a strict ±0.1 mm tolerance.
Frequently Asked Questions
Request Engineering Samples or RFQ
To evaluate physical samples or submit custom engineering blueprints for review, contact our application engineering team:
Engineering Sales Email: [Insert Professional Engineering Sales Email]
Required RFQ Information: Operating temperature, maximum current draw, wire gauge size, and estimated annual usage volume.
As one of the most professional ceramic terminal blocks manufacturers and suppliers in China, we also support customized service. Please rest assured to wholesale high quality ceramic terminal blocks in stock here from our factory. Contact us for more details.
ceramic anti arc spacer, ceramic bearing sleeve, ceramic mechanical spacer