User Manual: Sourcingmap 5W 700V 68 Ohm Metal Oxide Film Resistors

1. Introduzzjoni

This manual provides essential information for the Sourcingmap 5W 700V 68 Ohm Metal Oxide Film Resistors. These resistors are designed for various electronic applications, offering stable performance, low noise, and high precision. They are characterized by a 68 Ohm resistance, 5W rated power, 700V withstand voltage, and a +/-5% resistance tolerance. Featuring an axial lead design and 4-band color coding, they are suitable for through-hole mounting. Metal oxide film resistors are known for their higher operating temperature capability and enhanced stability compared to metal film resistors, and are ideal for applications requiring high endurance.

2. Prodott Aktarview

The Sourcingmap Metal Oxide Film Resistors are supplied in a pack of 10. Key features include:

• Isem tal-Prodott: Metal Oxide Film Resistor
• Karatteristiċi: Axial lead design
• Qawwa Rated: 5 W
• Tolleranza tar-reżistenza: ± 5%
• Jiflaħ Voltage: 700V
• Reżistenza: 68 Ohm
• Lead Size (each end): 30 x 0.5 mm / 1.18" x 0.019" (L * D)
• Daqs tal-ġisem: 24 x 7.3 mm / 0.94" x 0.287" (L * D)
• Total Weight (10 pcs): 35 g
• Kontenut: 10 x Metal Oxide Film Resistors

Figure 1: A set of ten Sourcingmap 5W 700V 68 Ohm Metal Oxide Film Resistors, each with an axial lead design and color bands indicating their resistance value. The resistors are light grey with blue, black, and gold bands.

3. Setup u Installazzjoni

These metal oxide film resistors are designed for through-hole mounting on printed circuit boards (PCBs) or for use in breadboards and prototyping. Follow these general steps for installation:

1. Identify Resistance: Before installation, verify the resistance value using the color code bands or a multimeter. For 68 Ohm, 5% tolerance resistors, the bands are typically Blue, Grey, Black, Gold.
2. Ipprepara l-Kuntatti Potenzjali: Gently bend the axial leads to fit the spacing of the holes on your PCB or breadboard. Avoid sharp bends near the resistor body to prevent damage.
3. Insert Resistor: Insert the leads into the designated holes. Ensure the resistor body is flush with the board surface if required by your design.
4. Solder (for PCBs): If installing on a PCB, carefully solder the leads to the copper pads on the underside of the board. Use appropriate soldering techniques to ensure a strong electrical and mechanical connection. Trim any excess lead length after soldering.
5. Ivverifika l-Konnessjoni: After installation, visually inspect the connections for proper soldering and ensure no short circuits are present.

Nota tas-Sigurtà: Always ensure power is disconnected from the circuit before installing or removing components. Wear appropriate safety gear, such as safety glasses, when soldering.

4. Prinċipji Operattivi

Resistors are passive two-terminal electrical components that implement electrical resistance as a circuit element. In a circuit, they reduce current flow, adjust signal levels, divide voltages, bias active elements, and terminate transmission lines, among other uses. The 5W 68 Ohm metal oxide film resistor functions by dissipating electrical energy as heat, according to Ohm's Law (V=IR) and Joule's Law (P=I²R).

• Resistance (68 Ohm): Determines the opposition to current flow.
• Rated Power (5W): Indicates the maximum power the resistor can safely dissipate without damage. Exceeding this rating will cause the resistor to overheat and fail.
• Jiflaħ Voltage (700V): Il-vol massimutage that can be applied across the resistor without causing dielectric breakdown.
• Tolerance (±5%): The permissible deviation from the stated resistance value.

Metal oxide film resistors are particularly suited for applications requiring high stability and reliability under varying temperature conditions, and where higher power dissipation is needed compared to standard metal film resistors.

5. Manutenzjoni u Immaniġġjar

Metal oxide film resistors are generally robust and require minimal maintenance. However, proper handling and environmental conditions are crucial for their longevity and performance.

• Ħażna: Store resistors in a dry, cool environment, away from direct sunlight and corrosive substances. Keep them in their original packaging or in anti-static bags to prevent physical damage and contamination.
• Immaniġġjar: Avoid excessive bending or pulling of the leads, especially close to the resistor body, as this can cause internal damage. Handle components by their body rather than their leads when possible.
• Tindif: If cleaning is necessary, use a soft, dry brush or compressed air to remove dust. Avoid using liquid cleaners unless specifically designed for electronic components and ensure the component is completely dry before use.
• Ġestjoni Termali: Ensure adequate ventilation around resistors in operation, especially when dissipating significant power, to prevent overheating.

6 Issolvi l-problemi

While resistors are simple components, issues can arise. Here are common troubleshooting steps:

• Incorrect Resistance Value:
  • Sintomu: Circuit not functioning as expected, or multimeter reading differs from marked value.
  • Azzjoni: Double-check the color code against a resistor color code chart. Measure the resistance with a calibrated multimeter. Ensure the resistor is not damaged.
• Overheating/Burning:
  • Sintomu: Resistor becomes excessively hot, discolors, or emits smoke/odor.
  • Azzjoni: This indicates the power dissipation exceeds the resistor's 5W rating. Verify circuit calculations for current and voltage. Replace with a resistor of higher power rating if necessary. Ensure proper ventilation.
• Open Circuit (Resistor Failure):
  • Sintomu: No current flow through the resistor, or infinite resistance reading on a multimeter.
  • Azzjoni: The resistor has likely failed internally, often due to excessive power or physical stress. Replace the resistor.
• Konnessjoni Fqira:
  • Sintomu: Intermittent circuit operation or incorrect readings.
  • Azzjoni: Inspect solder joints for cold joints or breaks. Re-solder if necessary. Ensure leads are securely inserted in breadboards.

7. Speċifikazzjonijiet

8. Garanzija u Appoġġ

Information regarding specific product warranty and customer support for these Sourcingmap Metal Oxide Film Resistors is not provided within this manual. For warranty details, technical support, or further inquiries, please refer to the manufacturer's official website or contact the retailer from whom the product was purchased. Keep your purchase receipt as proof of purchase.