499k Ohm 0.1W 0603 1% Smd Resistor

If the board list calls for a 499k resistor in a small 0603 footprint, and the old part is a 1% chip resistor, this is the part to order. It is a 499k ohm resistor rated at 0.1 W with ±1% tolerance, in a 0603 body about 1.6 mm long. It fits compact boards where a larger part will not fit, and where the resistance must stay close to 499 kΩ. It does not fit a 1206 footprint, a through-hole board, or any circuit that puts more than 75 V across it. Check the checks below before you order, so the value, the size, and the voltage all match your board.

This is an original, high-quality part.

What it does

A resistor limits current and sets a voltage in a circuit. A 499k resistor is a high-value resistor, so it passes only a very small current and is often used where a circuit must sense, divide, or bias a voltage without loading it down. The 1% tolerance means a new part measures between 494.01 kΩ and 503.99 kΩ, which keeps timing, sensing, and divider circuits close to their design values. The ±100 ppm/°C temperature coefficient means the value moves only about 0.01% per degree, so it stays steady as the board warms up.

This 499k 0603 resistor is a thick-film chip resistor with wraparound ends that solder flat onto the board. Its small 0603 SMD resistor 1% body suits dense boards with parts packed close together, and it works with normal reflow soldering.

Key features

• 499 kΩ resistance, ±1% tolerance
• 0.1 W power rating at 70 °C
• Maximum working voltage 75 V
• Temperature coefficient ±100 ppm/°C
• 0603 (1608 metric) body, 1.60 × 0.80 × 0.45 mm
• Thick-film chip resistor, surface mount, no polarity — fits either way round
• Working temperature −55 °C to +155 °C, with power derated above 70 °C

Checks before you order

• Value: the board list must say 499 kΩ. A 49.9 kΩ part or a 4.99 kΩ part is a different part, even though the digits look close. If the old part is marked 68D under the EIA-96 system, that is the same 499 kΩ value.
• Size: the pads on your board must be for a 0603 body (about 1.6 × 0.8 mm). A 1206 part is larger and will not sit right on 0603 pads — do not order the larger size as a swap for this footprint.
• Voltage: the voltage across this part must stay at or below 75 V. At this high value the voltage limit matters more than the power rating: at 75 V the part uses only about 0.011 W, well inside 0.1 W, but above 75 V it is the wrong pick even though the power looks small.
• Tolerance: your circuit must accept ±1%. If the old part was 5%, this 1% part still works in its place, because it is tighter. If the old part was 0.1% or 0.5%, do not swap down to 1% without checking the circuit.
• Fit for the job: a different value on the same board, such as a 68k part, is a different job, not a swap for this one. Match the value first, then the size, then the voltage.

Specifications

All figures below are series-level figures for a 0603, 1% thick-film chip resistor from the maker series documents. No figure here was guessed.

Other names for the same part (good to know)

Shoppers and repair techs call this same part by a few names. 499k resistor is the short name from its value. 499k ohm resistor is the plain name with the unit spelled out. 499k 0603 resistor is the name buyers use when the small size matters. 0603 SMD resistor 1% is the name buyers use when they search by size and tolerance. EIA-96 68D is the three-character code printed on the body under the EIA-96 system, where 68 stands for 499 and D means ×1000. If you see 68D on a small 0603 body, and your board list says 499 kΩ at 1%, this page is the right match. Do not judge by size alone — check the value too.

Frequently Asked Questions

What does 499k mean?

It means 499,000 ohms of resistance. The “k” stands for kilo, or one thousand, so 499k is 499 × 1000 ohms.

What does the 0603 size mean?

It is the chip size code. A 0603 body is about 1.6 mm long and 0.8 mm wide, which is smaller than a 0805 or 1206 part. Your board pads must match this size.

What is the 68D marking on the body?

Under the EIA-96 marking system, 68 stands for the digits 499 and D means ×1000, so 68D means 499,000 ohms. Some makers use a different marking, so the board list is the final check.

Can I use this part above 75 V if the power is small?

No. The maximum working voltage is 75 V, and it applies even when the power is tiny. At 499 kΩ the current is always small, so voltage, not power, is the limit to watch.

Does this resistor have a polarity?

No. A chip resistor works either way round. You can solder it in either direction and the circuit works the same.

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 high-precision surface-mount resistor for compact electronic circuits, used in electronic devices, PCB assemblies, communication equipment, power control circuits, and industrial electronics, where its small size, stable performance, and reliable construction suit high-density circuit board work — and that use still stands.