Resistor 12K Ohm 5% 1/4W (25-Pack)

12K Ohm 1/4W 5% Carbon Film Resistor — 25-Pack

A 25-piece pack of 12KΩ (12,000 ohm) carbon film resistors rated at 1/4W (0.25W) with ±5% tolerance. The 12KΩ value is widely used in pull-up and pull-down resistor networks, voltage divider circuits, RC timing circuits, and general-purpose signal conditioning in Arduino, ESP32, and embedded electronics projects. Carbon film construction provides stable resistance over temperature and good noise performance for general-purpose analogue and digital circuit applications.

Technical Specifications

Parameter	Value
Resistance	12KΩ (12,000Ω)
Tolerance	±5% (J grade)
Power Rating	1/4W (0.25W)
Type	Carbon film (through-hole, axial)
Temperature Coefficient	±200ppm/°C (typical for carbon film)
Operating Temperature	−55°C to +155°C
Colour Code	Brown-Red-Orange-Gold (12KΩ ±5%)
Pack Quantity	25pcs
Certification	RoHS

Colour Code Reference

Band 1	Band 2	Band 3 (Multiplier)	Band 4 (Tolerance)	Value
Brown (1)	Red (2)	Orange (×1000)	Gold (±5%)	12,000Ω = 12KΩ

Typical Applications

• Pull-Up / Pull-Down: 12KΩ pull-up resistor on I²C SDA/SCL lines, GPIO inputs, and open-collector/open-drain outputs for reliable logic level definition
• Voltage Divider: 12KΩ resistor in voltage divider networks for ADC input scaling, battery voltage monitoring, and sensor signal conditioning
• RC Timing Circuit: 12KΩ resistor in RC timing circuits for NE555 timer, RC oscillator, and debounce filter applications
• LED Current Limiting: 12KΩ current-limiting resistor for very low-brightness LED indicator applications (e.g., 5V supply: I = (5−2) / 12000 = 0.25mA)
• Base Resistor: 12KΩ base resistor for NPN/PNP transistor switching circuits with low-current GPIO drive

FAQ

Q: What is the maximum voltage for a 1/4W 12KΩ resistor?
A: Maximum voltage = √(P × R) = √(0.25 × 12000) = 54.8V. Do not exceed this voltage across the resistor to avoid exceeding the power rating.

Q: Is 12KΩ a standard E24 resistor value?
A: Yes. 12KΩ is a standard E24 series value (12, 13, 15, 16, 18, 20, 22, 24, 27, 30, 33, 36, 39, 43, 47, 51, 56, 62, 68, 75, 82, 91 × multiplier).

Package Contents

• 25 × 12KΩ 1/4W ±5% carbon film resistor (through-hole, axial)

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