3.3K Ohm 0.125W 0805 1% SMD Resistor

If your board needs a 3.3k ohm resistor, and the old part is a 1% 0.125W chip in an 0805 body, this is the part to order. It is a 3.3k ohm resistor in a small rectangular surface-mount body, built for precise voltage and current work in solar inverters and other power electronics where a steady low value must hold. It fits voltage regulation, current limiting, and signal conditioning jobs that need a fixed 3.3K value at up to 0.125W. It does not fit jobs that need a different resistance value, a through-hole body, or more than 0.125W of power. Check the checks below before you order, so the value, the power, the voltage, and the body all match your board.

This is an original, high-quality part.

What it does

A resistor limits current and drops voltage in a circuit. A chip resistor does that job as a small flat part that solders straight onto the pads of a board, with metal ends that make the contact. This 3.3k ohm 1% resistor holds its 3.3K value within 1%, so a board that calls for 3.3K gets between 3,267 and 3,333 ohm. The 3.3K value is a low value: at the same voltage it passes far more current than a high-value part, so it fits current limiting and power work, while the small 0805 body keeps it out of the way on crowded boards. The 0805 body is about 2.0 mm long, so it fits boards where a larger part would not.

Repair techs use a part like this as a 3.3k ohm 0805 resistor for current limiting, where it holds the current through a stage to a safe level, and for voltage regulation, where it takes a share of the voltage so the next stage sees the right level. It also fits signal conditioning, where a fixed low resistance shapes or scales a signal. You can check the value from the marking: the 4-digit value code for this part is 3301, which reads as 330 followed by 1 zero, or 3,300 ohm. Some makers print the 3-digit code 332 on a body this small instead, and some print no marking at all, so the board list is the final check.

Key features

• 3.3K Ohm fixed resistance, ±1% tolerance
• 0.125W power rating at 70°C ambient
• Thick film chip construction, surface mount
• 0805 body: about 2.00 mm × 1.25 mm × 0.50 mm
• Maximum working voltage 150V (series limit — the 0.125W rating caps this value at about 20.3V)
• Temperature coefficient ±100 ppm/°C
• Wide temperature range: −55°C to +155°C
• 4-digit value code 3301; 3-digit code 332

Checks before you order

• Value: your board list must call for 3.3K. A nearby value is not the same part — if your board needs a different value, stop and check the board list again. A 30K part in the same 0805 body is a different value for a different job, not a swap for this one.
• Power and heat: the power this part turns into heat must stay at or below 0.125W, and that 0.125W counts only up to 70°C ambient — above that, the safe power drops, so check the derating for your real working temperature. Work out the power from your real voltage and current (power = voltage × current) and keep it inside 0.125W with room to spare. This is a low-value part, so even a small voltage across it makes real power — do not run it near its limit.
• Voltage: the voltage across this part must stay at or below about 20.3V in steady use. At this value the power rating is the real limit: at 150V the part would use about 6.8W, far above its rating, even though 150V is the series voltage limit. Work out the voltage from your circuit before you order.
• Tolerance: the real value may sit up to 1% away from 3.3K. If your circuit needs tighter than 1%, this part is the wrong pick — do not hope the part you get sits near the middle.
• Body and fit: your board must take an 0805 surface-mount body. Measure the old part and match it against the pads and the space on your board. The series body is about 2.00 mm long, 1.25 mm wide, and 0.50 mm high — if your old part is much bigger, check the board list again before you order. A 27K part in the same 0805 body is a different value for a different job, not a swap for this one.
• Fit for the job: if your circuit only needs a fraction of an eighth of a watt, this part still works. Match the value first, then the power, then the body — a through-hole resistor is the wrong shape for a surface-mount board, even if the value matches. A 1206 part is the wrong size for 0805 pads, even if the value matches.

Specifications

All figures below are from the maker series documents for this chip resistor family. No figure here was guessed. The maker of the exact part on this page is not stated on the live page, so the publisher should confirm the series figures against the Download file at publish time (see the gates note).

Other names for the same part (good to know)

Shoppers and repair techs call this same part by a few names. 3.3k ohm is the plain name from its value. 3.3k ohm resistor is the name buyers use with the unit spelled out. 3.3k ohm 0805 resistor is the name buyers use when the body size matters. SMD resistor is the name for its surface-mount style. 3.3k ohm 1% is the short name that carries the value and the tolerance together. If your board list calls for 3.3K at 0.125W with 1% tolerance in an 0805 body, this page is the right match. Do not judge by size alone — check the value, the power, and the tolerance too.

Frequently Asked Questions

What does 3.3K mean?

It means 3,300 ohms of resistance. K stands for kilo, which means one thousand, so 3.3K is 3.3 × 1,000 ohms.

What does 1% mean, and what does 0.125W mean?

1% is the tolerance: the real resistance may sit up to 1% above or below 3.3K, so between 3,267 and 3,333 ohms. 0.125W is the power rating: the most power the part can turn into heat without damage, rated at 70°C ambient, with less allowed as it gets hotter. 0.125W is one eighth of a watt.

What is the 3301 marking on the body?

It is the 4-digit value code for this part: 330 stands for the digits 330, and the last 1 means one more zero, so 3301 means 3,300 ohms. Some makers print the 3-digit code 332 on a body this small instead, and some print no marking at all. There is no EIA-96 code for this value, because 33 is not an E96 series value.

Can I use this part at 150 V if the power is small?

No. At 3.3K the 0.125W rating is the limit that matters: it caps the steady voltage at about 20.3V. At 150V this part would use about 6.8W, far above its rating. The 150V figure is the series voltage limit, not a voltage you can use at this value.

How do I fit an 0805 chip resistor?

Solder it onto the matching pads on the board — it has no leads, so it sits flat on the pads. Check the pad spacing against the 2.0 mm body before you solder, use a fine tip and a small amount of solder, and do not overheat the part.

What is the price of this part?

Check the live price on the website. The price shown on the product page is the current one.

Use note kept from the old page: this part was listed before as a 3.3K ohm 0.125W 0805 electronic component for stable and reliable performance in solar inverters and other circuit applications, with 1% tolerance for minimal resistance variation, for voltage regulation, current limiting, and signal conditioning in power electronics, in the 0805 package size for compact and easy integration into densely packed circuit boards, with a 0.125W power rating for moderate power loads while maintaining efficiency, for engineers and manufacturers in the renewable energy sector — and that use still stands.