4.22K Ohm 0.1W 0603 1% SMD Resistor

 

If the board list calls for a 4.22k resistor in a small 0603 footprint, and the old part is a 1% chip resistor, this is the part to order. It is a 4.22k 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 4.22 kΩ. It does not fit a larger footprint, a through-hole board, or any circuit that puts more than about 20.5 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 4.22k resistor passes only a 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 4.178 kΩ and 4.262 kΩ, which keeps sensing, timing, 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 4.22k 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

• 4.22 kΩ resistance, ±1% tolerance
• 0.1 W power rating at 70 °C
• Maximum working voltage 75 V (series limit — the 0.1 W rating caps this value at about 20.5 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 4.22 kΩ. A 422 Ω part or a 42.2 kΩ part is a different part, even though the digits look close. If the old part is marked 61B in the EIA-96 system, or 4221 in the 4-digit system, that is the same 4.22 kΩ value.
• Size: the pads on your board must be for a 0603 body (about 1.6 × 0.8 mm, 1608 metric). A larger part will not sit right on 0603 pads — do not order a larger size as a swap for this footprint.
• Voltage: the voltage across this part must stay at or below about 20.5 V in steady use. At this value the power rating is the real limit: at 75 V the part would use about 1.33 W, far above its 0.1 W rating, even though 75 V is the series voltage limit. Work out the voltage from your circuit before you order.
• 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 an 82k 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.

Type	Thick-film chip resistor, surface mount
Resistance	4.22 kΩ (4,220 Ω)
Tolerance	±1% (4.178 kΩ to 4.262 kΩ)
Power rating	0.1 W at 70 °C
Maximum working voltage	75 V (series limit; the 0.1 W rating caps this value at about 20.5 V)
Maximum overload voltage	150 V
Temperature coefficient	±100 ppm/°C
Package	0603 (1608 metric)
Body size	1.60 × 0.80 × 0.45 mm
Body marking	EIA-96 code 61B where a code is printed (4-digit code 4221)
Operating temperature	−55 °C to +155 °C

Other names for the same part (good to know)

Shoppers and repair techs call this same part by a few names. 4.22k ohm is the short name from its value with the unit spelled out. 4.22k resistor is the shortest name buyers use. 4.22k 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. 4220 ohm resistor is the plain name from the resistance written out in ohms. If you see 61B on a small 0603 body, and your board list says 4.22 kΩ at 1%, this page is the right match. Do not judge by size alone — check the value too.

Frequently Asked Questions

What does 4.22k mean?

It means 4,220 ohms of resistance. The “k” stands for kilo, or one thousand, so 4.22k is 4.22 × 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. In metric terms 0603 imperial is 1608 metric. Your board pads must match this size.

What is the 61B marking on the body?

Under the EIA-96 marking system for 1% parts, the code 61 stands for the digits 422, and the letter B means multiply by 10, so 61B means 422 × 10 = 4,220 ohms. Some makers print the 4-digit code 4221 instead, and some print no marking on a body this small, so the board list is the final check.

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

No. At 4.22 kΩ the 0.1 W rating is the limit that matters: it caps the steady voltage at about 20.5 V. At 75 V this part would use about 1.33 W, far above its rating. The 75 V figure is the series voltage limit, not a voltage you can use at this value.

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 compact and reliable precision surface-mount resistor for accurate, stable circuit designs, in a small surface-mount package for modern PCB assemblies and space-sensitive circuits, used in industrial applications, consumer electronics, smartphones, computers, and other electronics — and that use still stands.