10pcs 100k ohms 5 band resistor 1/4w

High-precision, low-noise metal film resistors with a 100k ohm value and 1% tolerance. Identified by a 5-band color code, these components are essential for high-impedance circuits, precision voltage dividers, pull-up networks, and timing applications where stable and accurate resistance is critical.

✅ Specifications:

• Resistance: 100,000 Ohms (100kΩ)

• 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: Brown (1)

  • 2nd Band: Black (0)

  • 3rd Band: Black (0)

  • 4th Band: Orange (Multiplier x 1000)

  • 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 100kΩ (range: 99kΩ to 101kΩ), essential for accurate circuit ratios.

• Low Noise: Metal film construction generates significantly less inherent noise than carbon film, critical for sensitive analog and high-gain amplifier stages.

• Excellent Stability: Low temperature coefficient means minimal resistance change with temperature, ensuring consistent performance.

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

• High-Impedance Design: Ideal for circuits where minimal loading of the signal source is required.

📦 Typical Applications:

• Precision Voltage Dividers: High-ratio dividers for sensor scaling (e.g., with thermistors, photoresistors) and reference circuits.

• Op-amp Feedback & Gain Networks: Setting high gain values in inverting/non-inverting amplifier configurations.

• Pull-Up Resistors: For open-collector outputs, I2C buses, and high-impedance digital logic inputs.

• RC Timing Circuits: Creating long time constants with small capacitors in oscillator, delay, or filter circuits (e.g., with a 1µF capacitor, τ = 0.1 seconds).

• High-Impedance Buffers & Input Stages: In instrumentation amplifiers and comparator circuits.

• General High-Accuracy & Low-Loading Circuits: Any design requiring precise, high-value resistance without drawing significant current.

🔧 Usage & Calculations:

• Ohm’s Law (for Safe Operation):

  • Max Continuous Current: Imax=P/R=0.25/100000≈0.00158A_Imax_​=P/R_​=0.25/100000​≈0.00158_A or 1.58mA.

  • Max Voltage Drop: Vmax=P×R=0.25×100000≈158V_Vmax_​=P_×_R_​=0.25×100000​≈158_V.

• Power Dissipation: Typically very low in high-impedance signal applications. Ensure P=V2/R_P_=_V_2/R remains below 0.25W. At 100V, dissipation would be 0.1W.

• High-Voltage Caution: While the max voltage is high, the resistor’s voltage rating may be lower (typically 200-350V). Do not exceed the manufacturer’s rated working voltage.

⚠️ Important Considerations:

• Power Rating is for Voltage, Not Just Current: In high-voltage circuits, the voltage rating of the resistor body is as important as the power rating. Ensure your operating voltage is within spec.

• Leakage & Contamination: At very high impedances, board contamination and insulation leakage can become significant, potentially paralleling your resistor. Keep the PCB clean.

• Precision Use: For the most critical applications, consider measuring and selecting matched resistors.

• Heat Management: While power is usually low, avoid placing near heat sources to prevent value drift.