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KWX Ceramic Composition Resistor AS and ASH

KWX  Ceramic Composition Resistor AS and ASH

KWX Ceramic Composition Resistor AS and ASH

Product catalog summary
Overview: The document provides technical specifications and usage guidelines for SQH Ceramic Resistors, specifically the AS and ASH series, manufactured by SHENZHEN KWX ELECTRONICS CO., LTD. These resistors are noted for their large thermal capacity, non-inductive properties, and high durability, making them suitable for high-voltage applications.
Features: The resistors are designed to withstand impulse voltages and are durable under various conditions. They are non-inductive, which makes them ideal for applications such as impulse voltage generators, X-ray generators, and high-frequency circuits.
Applications: The resistors are used in a variety of high-voltage applications including impulse voltage generators, charging/discharging of capacitors, protection of electrostatic dust collectors, rectifiers, dummy loads, surge absorption, and other high-voltage circuits.
Specifications: The document lists various models (AS and ASH series) with different power ratings (ranging from 2W to 270W) and resistance ranges (from 0.1Ω to 100KΩ). The maximum operating impulse voltage and allowable energy injected are specified for each model.
Ordering Information: The resistors are categorized by series name, power rating, resistance tolerance, and resistance value. Examples of ordering codes are provided for clarity.
Dimensions: Detailed dimensions for each model are provided, including diameter, length, and terminal fittings. The AS models come with lead wires, while ASH models are solid with terminal fittings.
Performance Characteristics: The maximum operating temperature is 250°C, with a temperature coefficient detailed in Fig. 7. The resistors have a specific heat of 630J/(kg.k) and a thermal expansion coefficient of 5~7x10-6/°C.
Usage Notes: The resistors have hygroscopic characteristics, which can increase resistance. They should be stored in a moisture-free environment. Under high-voltage conditions, resistance may decrease, and specific conditions should be checked before use. The document advises on the potential for sparking under high impulse voltage conditions and provides recommendations for use in oil.
Graphs and Figures: The document includes several figures illustrating derating curves, surface temperature increases versus power, impulse withstand voltage versus specific resistance, and temperature coefficient of resistance versus specific resistance.
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Catalog excerpts

KWX  Ceramic Composition Resistor AS and ASH-1

% Applications 0 Features The large thermal capacity features unsurpassed strength against impulse voltage and as well as higher durability. These non- inductive resistors are ideal for such applications as shown right. • Charging/ discharging of capacitors, • Protection of electrostatic dust collectors, • Dummy loads, • Surge absorption, • Fusion devices • Distributors • Impulse voltage generators, # X-ray generators, • Protection of rectifiers, • High-frequency circuits, • Disconnectors and grounding resistors • Accelerators • Other high-voltage circuits Series Name Power Resistance Resistance Rating Tolerance SHENZHEN KWX ELECTRONICS CO,, LTD Http: //www.kwxcom.com

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KWX  Ceramic Composition Resistor AS and ASH-2

AS and ASH Resistors Dimensions AS with lead wires AS2~AS5 AS without terminal AS10~AS270 coated with insulation coated with insulation wire plated with copper san tin (ASH20~ASH80) Note:Provided with fittings coated with lead-free solder terminal fitting (plated with brass and nickel) coated with insulation M4 tapped hole, 5mm deep Type Power Cross Effective Volume sections length (cm³) (cm²) (cm) .The As2 to As5 models come with lead wires . Upon request, we will attach a standard terminal to any of the As10 to As270 models.(for details, see “standard mounting terminals”on page 14) . All the...

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KWX  Ceramic Composition Resistor AS and ASH-3

AS and ASH Resistors Characteristic Data 100 Sur face temperature increase T (℃) Rated power(%) Ambient temperature(℃) power (w) Fig:4 :Surface temperature increase vs. power for AS(1) Sur face temperature increase T (℃) Sur face temperature increase T (℃) Fig:5: Surface temperature increase vs. power for AS(2) Fig:6 :Surface temperature increase vs. power for ASH -0.01 The maximum operating impulse voltage is 5KV /cm If the entire length exceeds 200mm,the maximum operating impulse voltage is 4kv/cm maximum operating impulse voltage (kv/cm) maximum operating impulse voltage (kv/cm) Fig:7: Impulse...

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KWX  Ceramic Composition Resistor AS and ASH-4

% Notes on using the AS and ASH resistors Note on Using the AS and ASH Resistors .The AS and ASH resistors have hygroscopic characteristics, which result in increased resistance. To minimize the increase in resistance , store resistors at room temperature in an environment with no moisture absorption. .The resistance tends to increase gradually as voltage is applied .To use resistors for long periods of time, you need to set load conditions that ensure the surface temperature of the resistor does not exceed 1000C. .Under high-voltage conditions, the resistance will decrease at a specific resistance...

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