150 OHM± 5% 1/4W Through Hole Resistance

150 OHM ±5% 1/4W Through Hole Resistor — Carbon Film Axial

The 150 Ohm ±5% 1/4W Through Hole Resistor is one of the most widely used resistor values in electronics — found in everything from beginner Arduino LED projects to professional PCB designs. Built with a carbon film body and axial leads, this resistor is engineered for reliable, consistent performance in through-hole circuit applications.

Whether you’re a student, hobbyist, or professional engineer, this resistor delivers trusted performance at every stage of your project.

Key Specifications

• Resistance Value: 150 Ohm (150 Ω)
• Tolerance: ±5%
• Power Rating: 1/4W (0.25 Watts)
• Type: Carbon Film, Through Hole (THT), Axial Lead
• Color Code (4-Band): Brown – Green – Brown – Gold
• Maximum Operating Voltage: Up to 350V
• Operating Temperature: -55°C to +155°C
• Compliance: RoHS Compliant, Lead-Free

Color Code — Decoded

Reading the bands left to right: Brown (1) → Green (5) → Brown (×10 multiplier) → Gold (±5% tolerance) = 150 Ohms. The clear, easy-to-read color bands let you identify the value instantly without reaching for a multimeter — a feature especially valued for fast breadboarding and prototyping.

Where to Use This Resistor

The 150 Ohm resistor is one of the most versatile values you can stock. Common applications include:

LED current limiting circuits (3.3V and 5V systems), Arduino and Raspberry Pi GPIO pin protection, pull-up and pull-down resistor networks, voltage divider circuits, NE555 timer-based circuits, audio signal attenuation, transistor base bias resistors, and sensor interface circuits.

Why Carbon Film Through Hole?

Carbon film resistors offer the ideal balance of cost, reliability, and performance for general-purpose use. The through-hole (THT) axial lead design ensures secure mechanical stability during soldering, making them excellent for both permanent PCB assemblies and removable breadboard testing. The flame-retardant outer coating adds an extra layer of safety in enclosed PCB environments.

The stout 0.55mm diameter copper-plated steel leads ensure repeated and reliable insertion into solderless breadboards without bending or breaking — a key quality advantage over cheaper alternatives.

Technical Note — Safe Operating Power

While rated at 0.25W (1/4W), best practice for continuous-duty circuits is to derate to 50–70% of the rated power. This means keeping your circuit’s actual power dissipation at or below approximately 0.125W–0.175W, which significantly extends the component’s working lifespan and maintains stable resistance over time.

Frequently Searched — Answered Here

• What is the color code of a 150 Ohm resistor? → Brown, Green, Brown, Gold (4-band)
• What is 150 Ohm resistor used for? → LED limiting, voltage dividers, Arduino GPIO protection
• Is this resistor RoHS compliant? → Yes, fully RoHS and lead-free compliant
• What is the maximum voltage? → Up to 350V