1/2w33R Resistor (4-Band) (Metal oxide film) Code: 63954251

A 1/2W 33-Ohm metal oxide film resistor is an axial-lead electronic component designed to safely dissipate up to 0.5 W of power while offering a stable 33 Ω resistance. It is highly valued for its flame-retardant safety and excellent thermal stability in general-purpose circuits.

Key Specifications

• Resistance:33 Ω (Ohms)
• Power Rating:5 W (1/2 W)
• Technology:Metal Oxide Film (features a thick metal oxide layer deposited on a ceramic core, making it more robust than traditional carbon film)
• Standard Tolerance:Typically ± 5% (represented by a Gold band), though ± 1% or ± 2% is also available.
• Maximum Working Voltage:Usually rated up to 200V–350V (depending on the specific manufacturer’s data sheet).
• Operating Temperature:-55°C to +155°C

Resistor Color Code

For standard 4-band 33 Ω resistors with a ± 5% tolerance, the color rings on the body are:

1. Orange:3
2. Orange:3
3. Black:× 10⁰ (Multiplication factor of 1)
4. Gold:± 5% (Tolerance)

Typical Applications

Because of their flameproof coating and high pulse-handling capacity, these resistors are frequently used in:

• Power Supplies:As safe discharge or bleed resistors.
• Overcurrent Protection:They act as fusible elements in small appliances, intentionally burning out open without catching fire if a surge occurs.
• General Circuitry:Pull-up/pull-down lines or basic voltage dividers.