10pcs 470 ohms 5 band resistor 1/4w

🔹 10PCS 470 Ohm (470Ω) Metal Film Resistor – 1/4 Watt, 5-Band

High-precision, low-noise metal film resistors with a 470 ohm value and 1% tolerance. Identified by a 5-band color code, these components are ideal for precision current limiting, voltage dividers, pull-up networks, and feedback circuits where stable and accurate resistance is essential.

✅ Specifications:

• Resistance: 470 Ohms (470Ω)

• Tolerance: ±1% (Indicated by Brown 5th band)

• Power Rating: 1/4 Watt (0.25W)

• Type: Metal Film (Precision, Low Noise)

• Band Code: 5-Band

  • 1st Band: Yellow (4)

  • 2nd Band: Violet (7)

  • 3rd Band: Black (0)

  • 4th Band: Black (Multiplier x 1)

  • 5th Band: Brown (±1%)

• Package: Axial Leads

• Lead Spacing: Standard ~10mm (0.4″)

• Temperature Coefficient: Typically ±50 to ±100 ppm/°C

• Operating Temperature: -55°C to +155°C

• Quantity: 10 pieces

⚙️ Key Features:

• High Precision: 1% tolerance ensures the actual resistance is tightly centered around 470Ω (range: 465.3Ω to 474.7Ω).

• Low Noise: Metal film construction generates significantly less inherent noise than carbon film, making them perfect for sensitive analog and audio circuits.

• Excellent Stability: Low temperature coefficient means resistance changes very little with temperature fluctuations.

• Clear 5-Band Coding: The extra band allows precise identification of value and tolerance.

• Reliable & Durable: Robust construction for long-term stability in demanding applications.

📦 Typical Applications:

• Precision Current Limiting: For LEDs, laser diodes, or other components requiring exact current control (e.g., (5V – 1.8V)/470Ω ≈ 6.8mA).

• Pull-Up/Pull-Down Resistors: For I2C buses (common value), digital logic inputs, and microcontroller GPIO pins where a specific, stable value is required.

• Voltage Dividers: Used with other precision resistors to create accurate reference voltages for sensors or ADCs.

• Op-amp & Feedback Networks: Setting precise gain or attenuation in amplifier circuits.

• Impedance Matching: In RF and signal line applications where 470Ω is a specified characteristic impedance.

• General High-Accuracy Circuits: Any design where component tolerance directly impacts performance.

🔧 Usage & Calculations:

• Ohm’s Law (for Safe Operation):

  • Max Continuous Current: Imax=P/R=0.25/470≈0.023AImax​=P/R​=0.25/470​≈0.023A or 23mA.

  • Max Voltage Drop: Vmax=P×R=0.25×470≈10.8VVmax​=P×R​=0.25×470​≈10.8V.

• Power Dissipation: Always calculate actual power: P=I2RP=I2R or P=V2/RP=V2/R. Keep dissipation well below 0.25W (e.g., < 0.2W) for reliability.

• Common Use Case: A classic pull-up value for I2C buses, providing a good balance between current draw and rise time.

⚠️ Important Considerations:

• Power Limitation: The 1/4W rating is for low-power, signal-level applications only. For higher power, use resistors with a higher wattage rating.

• Precision Handling: While 1% is precise, for the most critical circuits (e.g., precision voltage references), consider measuring and selecting matched resistors.

• Heat Management: Avoid placing near heat sources to prevent value drift.