1K Ohm Resistor (1kΩ) 1/4W 1% – Pack of 10

1K Ohm Resistor (1kΩ) 1/4W 1% Metal Film – Pack of 10

These 1kΩ 1/4W metal-film resistors have a tight ±1% tolerance and are supplied as a pack of 10. Metal-film construction gives better stability and lower noise than carbon-film resistors, so the value stays accurate across temperature changes.

They are most commonly used for transistor base resistors, LED current limiting at higher voltages and general signal conditioning. The axial through-hole leads fit standard breadboards, perfboards and PCBs with 0.1″ (2.54mm) spacing.

Features

• Resistance: 1kΩ with ±1% tolerance
• Metal-film construction for low noise and good stability
• 1/4W (0.25W) power rating
• Axial through-hole leads — breadboard and PCB friendly
• 5-band colour code for easy identification
• Pack of 10 pieces

Specifications

• Resistance: 1kΩ
• Tolerance: ±1%
• Power rating: 1/4W (0.25W)
• Type: Metal film
• Temperature coefficient: ±100 ppm/°C
• Colour code (5-band): Brown – Black – Black – Brown – Brown
• Mounting: Through-hole, axial leads
• Pack size: 10 pieces

Quick Calculation

• At 5V a 1kΩ resistor limits current to 5 mA; with a 12V supply and a red LED it gives about 10 mA.
• Formula: R = (Supply voltage − LED forward voltage) ÷ desired current.
• Keep power below 0.25W: P = I² × R.

Applications

• Transistor base resistor (e.g. BC547 driving a relay)
• LED current limiting on 9V–12V supplies
• Signal conditioning and RC filters
• Voltage dividers
• Op-amp gain setting

Package Includes

• 10 x 1kΩ 1/4W 1% metal-film resistors

Frequently Asked Questions

How do I identify a 1kΩ resistor by colour code?
These are 5-band 1% resistors. The bands read Brown – Black – Black – Brown – Brown (the last brown band means ±1% tolerance).

What is the difference between metal-film and carbon-film resistors?
Metal-film resistors have tighter tolerance (±1% vs ±5%), lower noise and better temperature stability. They work as a drop-in replacement anywhere a carbon-film resistor is used.

Can I use a 1/4W resistor with Arduino or ESP32?
Yes. In typical 3.3V and 5V microcontroller circuits the power dissipated is far below 0.25W.

Do you sell other resistor values?
Yes — we stock 220Ω, 330Ω, 1kΩ and 10kΩ packs. Contact us for bulk quantities or other values.