3.3K Ohm 1/8W Through Hole Resistor (Pack of 5000)

The 3.3K Ohm 1/8W Through Hole Resistor is a precision carbon film resistor designed for general-purpose electronic applications requiring stable current limiting and voltage division in circuits operating at low to moderate power levels. Professional electronics engineers, PCB designers, and hobbyists rely on this component for prototyping, production assembly, and circuit repair across consumer electronics, industrial control systems, and educational projects. This resistor solves the critical need for accurate impedance matching and signal conditioning in circuits where component reliability and thermal stability are essential performance parameters.

Product Overview

The 3.3K Ohm 1/8W Through Hole Resistor operates on the fundamental principle of electrical resistance, converting excess electrical energy into heat through the movement of electrons through a resistive medium. The 1/8 watt power rating indicates the maximum continuous power dissipation capability under standard operating conditions, making this component ideal for low-power signal processing circuits. The through-hole design features two axial leads spaced 0.4 inches apart, enabling direct insertion into breadboards, perfboards, and PCB mounting holes without requiring surface mount equipment. Carbon film construction provides excellent frequency response characteristics up to several megahertz, making these resistors suitable for RF applications and high-speed digital circuits where parasitic inductance must be minimized.

This bulk pack of 5000 units represents exceptional value for production environments, educational institutions, and professional repair shops requiring consistent component inventory. The tight tolerance specification of ±5% ensures predictable circuit behavior across temperature variations from -55°C to +125°C, while the color band marking system (orange-orange-red-gold) provides immediate visual identification without requiring measurement tools. Each resistor undergoes rigorous quality control testing to verify resistance value, power rating, and lead integrity before packaging, guaranteeing performance consistency across the entire 5000-unit batch.

Key Specifications

Specification	Details
Product Type	Carbon Film Through Hole Resistor
Resistance Value	3.3K Ohm (3300 Ohm)
Power Rating	1/8 Watt (0.125W)
Tolerance	±5% (Standard)
Temperature Coefficient	±250 ppm/°C
Operating Temperature Range	-55°C to +125°C
Lead Spacing	0.4 inches (10.16mm) Standard
Lead Diameter	0.032 inches (0.8mm)
Color Code	Orange-Orange-Red-Gold
Frequency Response	DC to 5MHz
Quantity Per Pack	5000 Units
Brand	Standard Quality Original
Origin	Original/Authentic
Warranty	7 days on manufacturing defects
Shipping	1-5 days from Bengaluru
Delivery	7-8 days across India
Support	24/7 via Email and WhatsApp

Key Features

• Precision Carbon Film Construction: Provides ±5% tolerance accuracy with excellent stability across temperature ranges, ensuring reliable circuit performance in temperature-sensitive applications from industrial control systems to automotive electronics
• 1/8 Watt Power Rating: Suitable for low-power signal processing, biasing networks, and pull-up resistor applications in microcontroller circuits where thermal dissipation requirements are minimal
• Through Hole Design with Standard Lead Spacing: 0.4-inch axial lead configuration enables direct insertion into standard 0.1-inch breadboard grids and PCB mounting holes, eliminating the need for specialized surface mount assembly equipment
• Color Band Identification System: Orange-Orange-Red-Gold marking provides instant visual verification of resistance value without requiring digital multimeters, accelerating circuit assembly and troubleshooting procedures
• Bulk Pack of 5000 Units: Economical packaging for production environments, educational institutions, and repair facilities requiring consistent component inventory and reducing per-unit costs significantly
• Wide Frequency Response: Operates reliably from DC to 5MHz, making these resistors suitable for both analog signal conditioning and digital logic level shifting applications

Applications and Use Cases

• Microcontroller Pull-Up and Pull-Down Resistors: Essential for GPIO pin configuration in Arduino, Raspberry Pi, and ARM-based development boards where 3.3K Ohm values provide optimal impedance matching for digital signal integrity and noise immunity
• LED Current Limiting Circuits: Calculates precise forward current through LEDs using Ohm's law with 1/8W power rating, protecting semiconductor junctions from excessive current while maintaining desired luminosity in indicator and display applications
• Audio Signal Conditioning and Biasing: Provides impedance matching in pre-amplifier stages, tone control networks, and microphone biasing circuits where 3.3K Ohm values minimize signal loss while maintaining frequency response characteristics
• Voltage Divider Networks: Creates precise voltage scaling ratios in analog-to-digital converter input conditioning, sensor signal processing, and reference voltage generation circuits requiring stable impedance across temperature variations
• RF and High-Frequency Circuit Termination: Implements proper source and load impedance matching in RF amplifier stages, oscillator circuits, and transmission line termination networks where parasitic inductance must be minimized
• Industrial Control System Sensor Interfaces: Connects analog sensors, temperature transducers, and pressure transmitters to PLC and industrial automation controllers with impedance matching that reduces electromagnetic interference

How to Use

Begin by identifying the correct resistor from the pack using the color band marking system: locate the gold tolerance band at one end, then read the remaining three bands from the opposite end as orange-orange-red, representing 3.3K Ohms. Verify the resistance value using a digital multimeter set to the 20K Ohm range, measuring between the two axial leads to confirm ±5% tolerance compliance. Insert the resistor into your circuit at the designated location, ensuring proper polarity is maintained for circuits with polarized components nearby, though resistors themselves are non-polarized and function identically in either orientation.

For through-hole PCB assembly, insert the resistor leads through the pre-drilled holes aligned with the schematic symbol, ensuring leads pass completely through the board thickness. Solder both leads using a temperature-controlled soldering iron at 350°C for 3-5 seconds, applying rosin-core solder until a shiny cone-shaped joint forms around each lead. Remove excess lead length using diagonal cutters, leaving approximately 1/16 inch above the solder joint to prevent mechanical stress on the connection. For breadboard prototyping, simply push the resistor leads firmly into the breadboard socket until the resistor body sits flush against the board surface, ensuring secure electrical contact without requiring soldering.

Frequently Asked Questions

What is the difference between 1/8W, 1/4W, and 1/2W resistor power ratings?

Power rating indicates maximum continuous power dissipation capacity before the resistor generates excessive heat and fails. The 1/8W rating means this resistor can safely dissipate 0.125 watts continuously; exceeding this limit causes thermal runaway and component failure. Calculate actual power dissipation using P=I²R or P=V²/R to ensure your circuit operates within the 1/8W limit. For example, with 10mA current through 3.3K Ohms, power dissipation equals (0.01)² × 3300 = 0.33W, exceeding the 1/8W rating and requiring a higher-rated resistor. 1/4W and 1/2W resistors accommodate higher power applications but occupy more PCB space and cost more per unit.

Can I use a 3.3K Ohm resistor in place of a 3.9K Ohm resistor in my circuit?

The ±5% tolerance on this 3.3K Ohm resistor means actual values range from 3135 to 3465 Ohms, creating a potential 15% difference from a 3.9K Ohm specification. In non-critical applications like LED biasing or general current limiting, this substitution may work acceptably. However, in precision circuits such as analog filter networks, timing circuits, or sensor signal conditioning, the tolerance mismatch will introduce unacceptable frequency response errors or timing inaccuracies. Always verify circuit tolerance requirements before substituting resistor values; if tolerance is critical, use 1% tolerance precision resistors instead of standard 5% components.

Why do resistors have color bands instead of printed values?

Color band marking provides several advantages over printed text: the marking system remains readable after decades of storage, temperature cycling, and environmental exposure that would fade printed values; the standardized color code system (black=0, brown=1, red=2, orange=3, yellow=4, green=5, blue=6, violet=7, grey=8, white=9) enables rapid visual identification without magnification or measurement tools; and the bands wrap around the cylindrical resistor body, remaining visible from any viewing angle. The gold or silver tolerance band always appears at one end, providing orientation reference for reading the value bands correctly from the opposite end.

How do I verify the resistance value before installation?

Use a digital multimeter set to the appropriate ohms range: for 3.3K Ohm resistors, select the 20K Ohm range to obtain maximum measurement accuracy. Touch the multimeter probes to both resistor leads; the display should show a value between 3135 and 3465 Ohms (±5% tolerance around 3300 Ohms). If the reading shows "OL" (overload), the selected range is too low; switch to the 200K Ohm range. If the reading shows "0.00" or significantly lower values, the resistor may be damaged or defective; discard it and select another unit from the pack. This verification process takes 10 seconds per resistor and prevents circuit failures caused by defective components.

When will I receive my order?

Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.

What is your return and warranty policy?

We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.

Are bulk discounts available?

Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.

Why Buy from The Engineer Store

• Genuine Products: Sourced directly from authorized distribut

Buy 3.3K Ohm 1/8W Through Hole Resistor (Pack of 5000) Online in India

Purchase the 3.3K Ohm 1/8W Through Hole Resistor (Pack of 5000) online at The Engineer Store, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat.

Our team in Bengaluru is available 24/7 to support your journey from product selection to project completion.