8.5X31.5 CERAMIC FUSE 8A

8.5X31.5 CERAMIC FUSE 8A – High-Breaking Capacity gG/gL Cylindrical Cartridge Fuse

The 8.5X31.5 CERAMIC FUSE 8A is an industrial-grade $8text{ A}$ low-voltage cylindrical cartridge fuse designed for full-range overcurrent and short-circuit protection in electrical distribution circuits, control panels, and industrial machinery. Built to the standardized $8.5text{ mm} times 31.5text{ mm}$ physical form factor (CH8 / $8times 31text{ mm}$ class), this ceramic fuse operates at a rated voltage of $400text{ V AC}$ with a high interrupting capacity of up to $100text{ kA}$ .

Utilizing a $gG/gL$ operational characteristic curve (IEC 60269 / VDE 0636 standard), the 8.5X31.5 CERAMIC FUSE 8A provides comprehensive protection against both low-level thermal overloads and extreme short-circuit currents. The high-density steatite ceramic body, filled with fine silica quartz sand and capped with silver-plated copper ferrule terminals, ensures fast arc extinction and long-term thermal stability.

As illustrated in the product image, the fuse features a cylindrical white ceramic tube laser-printed with standard operational markings, including “8.5 x 31.5”, “400V~ 100kA”, “gG/gL”, “IEC 269”, “VDE0636”, and the “CE” mark, fitted with solid metallic end contact caps.

Key Features of the 8.5X31.5 CERAMIC FUSE 8A

High Breaking Capacity ( $100text{ kA}$ at $400text{ V AC}$ ): Safely interrupts high-energy short-circuit fault currents up to $100text{ kA}$ , preventing catastrophic equipment damage or arc flash risks.
Full-Range gG/gL Protection: Engineered to handle both slow thermal overload currents and instantaneous high-magnitude short circuits across general distribution circuits.
Steatite Ceramic Body Construction: High thermal resistance and mechanical strength body withstands extreme internal pressures during fault interruption without fracturing.
Silver-Plated Copper Contacts: Corrosion-resistant ferrule caps maintain low contact resistance, reducing power dissipation ( $I^2 R$ losses) across the fuse disconnect holder.
Quartz Sand Arc Extinguishing Medium: Packed with high-purity silica sand inside the ceramic core to rapidly absorb energy and suppress electrical arcs during element melting.
International Regulatory Compliance: Fully certified to IEC 60269-1 / IEC 60269-2, VDE 0636, and CE standards for global industrial compatibility.

Common Applications and Practical Usage

The high breaking capacity and compact footprint of the 8.5X31.5 CERAMIC FUSE 8A make it a standard protective component across industrial and commercial power distribution setups:

Modular Fuse Disconnect Holders: Mounts into standard rail-mounted $8.5times 31.5text{ mm}$ isolatable fuse carriers (such as Schneider Acti9 STI or Legrand carriers).
Industrial Control Panels & Automation: Protects auxiliary control transformers, relay power feeds, solenoid valves, and PLC power modules.
Lighting & Power Distribution Circuits: Serves as branch-circuit protection for commercial lighting panels, heating circuits, and small power supply lines.
Variable Frequency Drives (VFDs) & Power Supplies: Acts as primary input line protection for low-power motor drives and electronic power converter units.

Technical Specifications

The core electrical, mechanical, and regulatory parameters for the 8.5X31.5 CERAMIC FUSE 8A are summarized below:

Parameter Specification	Technical Details & Operational Values
Component Classification	Cylindrical Ceramic Cartridge Fuse Link
Primary Target Keyword	8.5X31.5 CERAMIC FUSE 8A
Physical Dimensions ( $varnothing times L$ )	$8.5text{ mm} times 31.5text{ mm}$ (Standard CH8 / $8times 31text{ mm}$ )
Rated Current ( $I_n$ )	$8text{ A}$
Rated Voltage ( $U_n$ )	$400text{ V AC}$
Interrupting Capacity ( $I_1$ )	$100text{ kA}$ at $400text{ V AC}$
Utilization Category / Speed	gG / gL (Full-Range General Line Protection)
Body Material	High-Grade Steatite Ceramic
Contact Cap Material	Silver-Plated Copper Ferrules
Internal Filling	Quartz / Silica Sand Arc Suppressor
Applicable Standards	IEC 60269-1 / -2, IEC 269, VDE 0636, CE

Installation Guidelines and Maintenance Tips

SAFETY NOTICE: Always isolate power supplies at the main circuit breaker before inserting or replacing cartridge fuses inside fuse carriers.

Holder Verification: Ensure the target fuse holder is rated for $8.5times 31.5text{ mm}$ cartridges and compatible with $400text{ V AC}$ operational ratings.

Correct Replacement: Replace blown fuses only with the exact same current rating ( $8text{ A}$ ) and characteristic curve ( $gG/gL$ ) to maintain downstream protection integrity.

To review official international standards for low-voltage fuse links and testing requirements, consult the official IEC 60269 Low-Voltage Fuses Standard Directory.

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