SMD Resistor 220ohm (221) (0805) (10pcs)

Description

SMD Resistor 220Ω (221) OHM (0805) (10pcs)

The SMD Resistor 220Ω (221) OHM (0805) is a surface-mount device (SMD) resistor with a resistance value of 220 ohms (220Ω). It comes in an 0805 package, which is commonly used in high-density circuit designs. This resistor is supplied in packs of 10 pieces, making it convenient for small-scale applications, repairs, or prototyping.

Key Features:

1. Resistance Value:

   • 220Ω (220 ohms).

   • The “221” code follows the 3-digit resistor code:

     • 22 represents the base value (22).

     • 1 is the multiplier (10¹), so the resistance value is 22 × 10¹ = 220Ω.

2. Package Size:

   • 0805: The 0805 package dimensions are 0.08″ x 0.05″ (2.0mm x 1.25mm). This size is suitable for compact, high-density PCB designs, which are commonly found in modern electronics.

3. Quantity:

   • Supplied in packs of 10 pieces, making it perfect for small projects, repairs, or for use in prototypes that require multiple resistors.

4. Tolerance:

   • Typically ±5%, which means the actual resistance value can vary by 5% from the nominal value. Some manufacturers may offer versions with ±1% tolerance for more precise applications.

5. Power Rating:

   • 0.125W (1/8 watt) is the typical power rating for 0805 resistors. It is suitable for low-power applications but make sure it matches the power requirements of your circuit to avoid overheating.

6. Composition:

   • Commonly made from metal oxide, carbon film, or thick film materials, ensuring stable performance, long-term reliability, and minimal resistance drift over time.

Applications:

1. Current Limiting:

   • The 220Ω resistor is commonly used in current-limiting circuits, for example, to limit current flow through LEDs or sensitive components to prevent damage from excessive current.

2. Voltage Dividers:

   • It can be used in voltage divider circuits to split a voltage into smaller, desired levels for biasing transistors, op-amps, or other analog components.

3. Signal Conditioning:

   • Used in signal conditioning circuits, especially for impedance matching, voltage attenuation, or current sensing.

4. Pull-up/Pull-down Resistors:

   • The 220Ω resistor is often employed in digital circuits as a pull-up or pull-down resistor, ensuring the state of a signal line is defined when no active device is driving it.

5. Filtering Circuits:

   • It can be part of RC (Resistor-Capacitor) or RLC (Resistor-Inductor-Capacitor) filter circuits, where the resistor helps determine the cutoff frequency for low-pass, high-pass, or band-pass filters.

6. Amplification and Biasing:

   • Used in amplification circuits for biasing transistors, where precise resistor values help maintain stable operating points.

Advantages:

• Compact Size (0805): The 0805 package is small and suitable for compact, space-constrained PCB designs in modern electronics.

• Cost-Effective: SMD resistors are inexpensive, making them ideal for both prototyping and high-volume manufacturing.

• High Reliability: These resistors are highly reliable, especially when placed using automated assembly, as they are less prone to damage compared to through-hole components.

• Stable Performance: SMD resistors provide consistent resistance over time and are not affected by vibrations, making them reliable in automotive and industrial applications.