240 Ohm 0.25W 1206 1% SMD Resistor

If your board needs a 240 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 240 ohm resistor in a small rectangular surface-mount body, built for stable power regulation in solar inverters and other electronic circuits where a steady low value must hold. It fits current limiting, power regulation, and energy conversion jobs that need a fixed 240 ohm 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 240 ohm 1% resistor holds its 240 ohm value within 1%, so a board that calls for 240 ohm gets between 237.6 and 242.4 ohm. The 240 ohm 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 240 ohm 0805 resistor for current limiting, where it holds the current through a stage to a safe level, and for power regulation, where a steady low value keeps a supply stage stable. It also fits energy conversion work, where a fixed low resistance sets a level without wasting power. You can check the value from the marking: the 4-digit value code for this part is 2400, which reads as 240 followed by no more zeros, or 240 ohm. Never use the code 2401 for this part — 2401 means 2,400 ohm.

Key features

• 240 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 5.5V)
• Temperature coefficient ±100 ppm/°C
• Wide temperature range: −55°C to +155°C
• 4-digit value code 2400

Checks before you order

• Value: your board list must call for 240 ohm. A nearby value is not the same part — if your board needs a different value, stop and check the board list again. A 10K part in a 1206 body is a different value in a bigger body 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 5.5V in steady use. At this value the power rating is the real limit: at 150V the part would use about 94W, 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 240 ohm. 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 665K part in a 1206 body is a different value in a bigger body 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, for the 0805 size. 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. 240 ohm is the plain name from its value. 240 ohm resistor is the name buyers use with the unit spelled out. 240 ohm 0805 resistor is the name buyers use when the body size matters. SMD resistor is the name for its surface-mount style. 240 ohm 1% is the short name that carries the value and the tolerance together. If your board list calls for 240 ohm 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 240 ohm mean?

It means 240 ohms of resistance. Ohm is the unit of resistance, so a 240 ohm part resists current flow by 240 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 240 ohm, so between 237.6 and 242.4 ohm. 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 2400 marking on the body?

It is the 4-digit value code for this part: 240 stands for the digits 240, and the last 0 means no more zeros, so 2400 means 240 ohm. The 3-digit code for the same value is 241. There is no EIA-96 code for this value, because 240 is not an E96 series value. Never use the code 2401 — that means 2,400 ohm, ten times this value.

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

No. At 240 ohm the 0.125W rating is the limit that matters: it caps the steady voltage at about 5.5V. At 150V this part would use about 94W, 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 240 ohm SMD resistor for stable circuit performance, for solar inverter applications, with 1% tolerance for consistent resistance, for power regulation and energy conversion, in an 0805 package for compact PCB layouts — and that use still stands.