DC Switch / Isolator
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This page explains how Arc Chamber is classified within Electrical Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.
A safety component in DC switches/isolators designed to contain, cool, and extinguish electrical arcs during circuit interruption.
Technical details and manufacturing context for Arc Chamber
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Rated voltage | 400–1500 V DC | 400–1500 — Maximum DC voltage the chamber is designed to interrupt.IEC 60947-3 |
| Arc energy withstand | 100–500 kJ | 100–500 — Total energy the chamber can absorb per operation without damage. |
| Operating temperature range | -40–+85 °C | -40 to +85 — Ambient temperature range for normal operation.IEC 60068-2-1 · IEC 60068-2-2 |
| Insulation resistance | ≥100 MΩ | ≥100 — Measured at 500 V DC between live parts and ground.IEC 60243-1 |
| Dielectric withstand voltage | 2.5–10 kV | 2.5–10 — Power frequency withstand voltage for 1 minute.IEC 60243-1 |
| Material of arc chamber body | Alumina (Al2O3) 95–99.5% or DMC/BMC (glass fiber reinforced polyester) | Alumina (Al2O3) 95–99.5% or DMC/BMC (glass fiber reinforced polyester) — High-temperature ceramic or arc-resistant thermoset plastic.ASTM C1161 (for ceramic) · ISO 14530 (for DMC/BMC) |
| Material of arc runners | Copper alloy (e.g., CuCr1Zr, CuW) | Copper alloy (e.g., CuCr1Zr, CuW) — High conductivity and arc erosion resistance.ASTM B187 (for copper) |
| Material of splitter plates | Steel (e.g., DC01, DC04) with optional magnetic coating | Steel (e.g., DC01, DC04) with optional magnetic coating — Ferromagnetic steel for arc splitting.EN 10130 (for cold rolled steel) |
| Arc chamber dimensions | Length 50–300, Width 30–150, Height 30–100 mm | Length 50–300, Width 30–150, Height 30–100 — Overall dimensions, depend on rated current and breaking capacity. |
| Mounting interface | M4–M12 bolt holes, 4–8 holes, pitch 20–100 mm | M4–M12 bolt holes, 4–8 holes, pitch 20–100 mm — Bolt pattern for mounting to switch housing.ISO 273 (for bolt holes) |
| Connection terminals | M8–M16 threaded studs or busbar connections, 10–50 mm width | M8–M16 threaded studs or busbar connections, 10–50 mm width — Electrical connection points for arc runners.IEC 60947-1 |
| Mechanical endurance | 10000–100000 operations | 10000–100000 — Number of no-load operations before mechanical failure.IEC 60947-3 |
| Electrical endurance | 1000–10000 operations | 1000–10000 — Number of load operations at rated current before arc chamber needs replacement.IEC 60947-3 |
| Pollution degree | 3 | 3 — Typical for industrial environments.IEC 60664-1 |
| Ingress protection (IP) rating | IP20–IP54 | IP20–IP54 — IP20 for indoor, IP54 for dust and splash protection.IEC 60529 |
| Flammability rating | UL94 V-0 | UL94 V-0 — For plastic materials.UL 94 |
| Thermal conductivity of ceramic | 20–35 W/m·K | 20–35 — For alumina ceramic.ASTM C408 |
| Ambient temperature | -40–+85 °C | -40 to +85 °C — Outside this window: Below -40°C: materials become brittle, risk of cracking. Above +85°C: thermal degradation of plastics, reduced dielectric strength. |
| Coefficient of thermal expansion | 6–8 x 10^-6 1/K | 6–8 x 10^-6 — For alumina ceramic.ASTM E228 |
| Relative humidity | 5–95% non-condensing | 5–95% non-condensing — Outside this window: Condensation can cause surface tracking, insulation failure. |
| Arc resistance (ASTM D495) | ≥180 s | ≥180 — For plastic materials.ASTM D495 |
| Altitude | 0–2000 m | 0–2000 m — Outside this window: Above 2000 m, dielectric strength decreases, may require derating. |
| Comparative tracking index (CTI) | ≥600 V | ≥600 — For plastic materials.IEC 60112 |
| Rated current | 100–4000 A | 100–4000 A — Outside this window: Exceeding rated current leads to overheating, accelerated wear, possible welding of contacts. |
| Breaking capacity | 10–100 kA | 10–100 kA — Outside this window: Exceeding breaking capacity may cause arc chamber rupture, fire, or explosion. |
| Arc duration | 5–50 ms | 5–50 ms — Outside this window: Longer arc duration increases energy, may cause excessive erosion or thermal damage. |
| Duty cycle | 10–100 ops/h | 10–100 ops/h — Outside this window: Higher frequency leads to overheating, reduced life. |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
Commonly used trade names and technical identifiers for Arc Chamber.
This component is essential for the following industrial systems and equipment:
Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.
Quoted from the published standard.
3 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.
Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.
A practical evidence checklist for RFQ preparation and supplier evaluation.
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The arc chamber contains and extinguishes the electrical arc that forms when contacts open under load. It prevents damage to other components by cooling, lengthening, and splitting the arc into smaller segments, ensuring safe circuit interruption.
Common materials include high-temperature ceramic (alumina) or arc-resistant thermoset plastic (DMC/BMC) for the body, copper alloy for arc runners, and steel for splitter plates. These materials are chosen for their thermal and electrical properties.
Relevant standards include IEC 60947-3 for switches, IEC 60664-1 for insulation coordination, IEC 60529 for ingress protection, and UL 94 for flammability. Always verify compliance with the manufacturer for specific models.
Selection depends on rated voltage, current, breaking capacity, and environmental conditions. Refer to the manufacturer's datasheet for model-specific values and ensure they meet your system requirements. Confirm all parameters with the supplier.
Editorial classification, named public sources where available, and source-reviewed manufacturer records.
Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.
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