20pcs 1.5k ohms resistor 4 band 1/4w

🔹 20PCS 1.5k Ohm (1.5kΩ) Carbon Film Resistor – 1/4 Watt, 4-Band

A high-value, essential through-hole resistor pack ideal for voltage dividers, pull-up/pull-down networks, LED current limiting for higher voltages, and general circuit biasing. The 1.5k ohm value is a common standard resistor used in a wide variety of electronic designs.

✅ Specifications:

• Resistance: 1,500 Ohms (1.5kΩ)

• Tolerance: ±5% (Indicated by Gold 4th band)

• Power Rating: 1/4 Watt (0.25W)

• Type: Carbon Film (General Purpose)

• Band Code: 4-Band

  • 1st Band: Brown (1)

  • 2nd Band: Green (5)

  • 3rd Band: Red (Multiplier x 100)

  • 4th Band: Gold (±5%)

• Package: Axial Leads

• Lead Spacing: Standard ~10mm (0.4″)

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

• Quantity: 20 pieces

⚙️ Key Features:

• Common Value: The 1.5kΩ resistor is a standard E-series value frequently found in schematics for biasing transistors, setting op-amp gain, and creating reference voltages.

• Clear Color Coding: Easy-to-read color bands (Brown, Green, Red, Gold) for quick identification and verification.

• Reliable & Cost-Effective: Carbon film construction provides stable performance for general-purpose applications.

• Standard 1/4 Watt: The most common power rating for signal-level and low-power circuits.

• Prototyping Ready: Long axial leads are perfect for breadboards, perfboards, and through-hole PCBs.

📦 Typical Applications:

• Voltage Dividers: Commonly paired with other resistors (e.g., with a 10kΩ resistor) to create specific voltage points from a supply rail.

• LED Current Limiting: For LEDs running on 12V or higher supplies. (e.g., with a 12V supply and a typical 2V LED: (12V-2V)/0.01A = 1000Ω; 1.5kΩ provides a safe ~6.7mA).

• Pull-Up/Pull-Down Resistors: For digital logic circuits, I2C buses, and microcontroller GPIO pins where a value between 1k and 10k is specified.

• Transistor & Op-amp Biasing: Setting base current or feedback ratios in amplifier stages.

• General Circuit Building & Repair: A versatile value to have in bulk for prototyping, kits, and fixing consumer electronics.

🔧 Usage & Calculations:

• Ohm’s Law (for Safe Operation):

  • Max Continuous Current: I=P/R=0.25/1500≈0.0129AI=P/R​=0.25/1500​≈0.0129A or 12.9mA.

  • Max Voltage Drop: V=P×R=0.25×1500≈19.4VV=P×R​=0.25×1500​≈19.4V.

• Power Dissipation: Always calculate the actual power in your circuit: P=I2RP=I2R or P=V2/RP=V2/R. Ensure it stays well below 0.25W for reliable operation (derate to ~0.2W for safety).

• Tolerance Range: With ±5% tolerance, the actual resistance of any given resistor will be between 1,425Ω and 1,575Ω.

⚠️ Important Considerations:

• Power Rating: The 1/4W (0.25W) rating is for low-power applications only. If your circuit dissipates more than ~0.2W in the resistor, it will get very hot and likely fail. Use a 1/2W or higher wattage resistor for higher power circuits.

• Heat: A resistor operating near its maximum power will be too hot to touch and may drift in value. Provide adequate spacing and ventilation.

• Measurement: For precision circuits, verify the actual resistance with a multimeter, as the 5% tolerance provides a significant range.