10pcs 1.2k ohms 5 band resistor 1/4w

🔹 10PCS 1.2k Ohm (1.2kΩ) Metal Film Resistor – 1/4 Watt, 5-Band

High-precision metal film resistors with a 1.2k ohm value and 1% tolerance. Identified by a 5-band color code, these components are essential for precision analog circuits, sensor interfaces, and voltage dividers where stable and accurate resistance is critical.

✅ Specifications:

• Resistance: 1,200 Ohms (1.2kΩ)

• 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: Red (2)

  • 3rd Band: Black (0)

  • 4th Band: Brown (Multiplier x 10)

  • 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 1.2kΩ (range: 1,188Ω to 1,212Ω).

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

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

• Clear 5-Band Coding: Allows precise identification of value and tolerance.

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

📦 Typical Applications:

• Precision Voltage Dividers: Used with sensors (e.g., thermistors, photoresistors) and in reference voltage circuits where ratio accuracy is paramount.

• Op-amp & Instrumentation Amplifier Circuits: Setting precise gain, feedback, and offset values.

• Analog-to-Digital Converter (ADC) Scaling Networks: Creating precise input scaling for accurate sensor measurement.

• Current Sensing: As a precision shunt resistor in low-side current measurement circuits (for very small currents).

• Filter & Timing Circuits: In active/passive filters and RC networks where the cutoff frequency or time constant depends on precise resistance.

• 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=0.25/1200≈0.0144AImax​=P/R​=0.25/1200​≈0.0144A or 14.4mA.

  • Max Voltage Drop: Vmax=P×R=0.25×1200≈17.3VVmax​=P×R​=0.25×1200​≈17.3V.

• 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 and to minimize self-heating, which can affect the precise value.

• Tolerance Impact: For a 5V voltage divider using two 1.2kΩ 1% resistors, the mid-point voltage will be 2.5V ± ~0.5% due to tolerance stacking.

⚠️ 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, measure and select matched resistors or use precision resistor networks.

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