on February 16th 656

4.7 kΩ Resistor Guide: Color Code, Uses, Testing & Value Comparison

A 4.7 kΩ resistor is a common electronic part used to control current and set voltage in circuits. This article explains what the value means, how to read its color bands, and what its main specifications are. It also shows where it is normally used, such as pull-up and pull-down signals, transistor control, and voltage dividers. You will also learn how to check it using a multimeter and how it compares with 10 kΩ and 47 kΩ resistors.

Catalog

Figure 1. 4.7 kΩ Axial Resistor

What is a 4.7 kΩ Resistor?

A 4.7 kΩ resistor is a resistor with a resistance value of 4,700 ohms (Ω). The “kΩ” means kilo-ohms, so 4.7 kΩ = 4.7 × 1,000 Ω = 4,700 Ω. In a circuit, this value is commonly used to reduce current to a safer level or to set a voltage level at a node. It helps keep signals stable by controlling how much current can flow through a path. In simple terms, a 4.7 kΩ resistor is a standard value used to control current or shape voltage without letting the circuit draw too much.

Electrical Specifications of a 4.7 kΩ Resistor

A 4.7 kΩ resistor can be made in many types and sizes, so its specifications vary by series and manufacturer. The table below lists common, measurable specs you’ll see on datasheets.

Specifications	Typical Range
Nominal resistance	4.7 kΩ (4,700 Ω)
Tolerance	±0.1%, ±0.5%, ±1%, ±2%, ±5%
Power rating (axial)	1/8 W, 1/4 W, 1/2 W, 1 W, 2 W
Power rating (SMD)	1/20 W, 1/16 W, 1/10 W, 1/8 W, 1/4 W
Temperature coefficient (TCR)	25, 50, 100, 200, 300 ppm/°C
Operating temperature range	−55°C to +155°C (varies by type)
Max working voltage	~50 V to 500 V (depends on package/power)
Max overload voltage	Higher than working voltage (series-dependent)
Package size (SMD)	0201, 0402, 0603, 0805, 1206, 1210
Body size (axial)	Depends on wattage (longer body for higher W)
Resistor technology	Thick film, thin film, metal film, wirewound
Long-term stability	e.g., ±(0.2% to 1%) over 1,000 hrs (type-dependent)
Noise (relative)	Lower in metal/thin film, higher in some thick film
Voltage coefficient	Typically low; specified more in precision types
Moisture / environmental rating	Varies (general-purpose to high-reliability series)

4.7 kΩ Resistor Color Code

Many 4.7 kΩ resistors use color bands so you can identify the value quickly. The band count (4, 5, or 6) mainly changes how many digits are shown and whether extra info like temperature coefficient is included.

4-Band Color Code

Figure 2. 4-Band 4.7 kΩ Color Code

Band Position	Color	Meaning	Value
1st band	Yellow	1st digit	4
2nd band	Violet	2nd digit	7
3rd band	Red	Multiplier	×100 (10²)
4th band	Gold	Tolerance	±5%

The first two bands give the number 47. The third band (red) means multiply by 100, so 47 × 100 = 4,700 Ω. That is 4.7 kΩ. The gold band shows the resistance can vary by ±5% from the stated value.

5-Band Color Code

A 5-band resistor adds an extra digit, so the value uses three significant digits before the multiplier. This is commonly used for tighter tolerance parts.

Figure 3. 5-Band 4.7 kΩ Color Code

Band Position	Color	Meaning	Value
1st band	Yellow	1st digit	4
2nd band	Violet	2nd digit	7
3rd band	Black	3rd digit	0
4th band	Brown	Multiplier	×10 (10¹)
5th band	Brown	Tolerance	±1%

The first three bands form 470. The multiplier band (brown) means ×10, so 470 × 10 = 4,700 Ω. That equals 4.7 kΩ. The last band (brown) indicates ±1% tolerance, which is generally more precise than common 4-band parts.

6-Band Color Code

A 6-band resistor includes a temperature coefficient (tempco) band in addition to tolerance. This is useful when you care about value stability as temperature changes.

Figure 4. 6-Band 4.7 kΩ Color Code

Band Position	Color	Meaning	Value
1st band	Yellow	1st digit	4
2nd band	Violet	2nd digit	7
3rd band	Black	3rd digit	0
4th band	Brown	Multiplier	×10 (10¹)
5th band	Green	Tolerance	±0.5%
6th band	Brown	Tempco	100 ppm/°C

The green band means the resistor is allowed to vary by ±0.5% from 4.7 kΩ. The brown tempco band means the resistance changes about 100 ppm/°C, which is 0.01% per °C (because 100 ppm = 100/1,000,000). Lower ppm/°C values usually mean better stability when temperatures rise or fall. This is why 6-band resistors are often used where consistent resistance matters over temperature.

Applications of a 4.7 kΩ Resistor

A 4.7 kΩ resistor is a “middle” value that fits many practical designs, especially around logic signals and small-signal circuits. Below are common ways it is used in circuits.

1. Pull-up resistor for digital inputs

A 4.7 kΩ pull-up helps a digital input read a clean HIGH when the switch or output is open. It gives a strong enough pull-up to fight small noise, but it still keeps current reasonable when the line is pulled LOW. This value is widely seen on microcontroller inputs and open-drain outputs. It is also common on shared signal lines where stability matters.

2. Pull-down resistor for stable LOW state

A 4.7 kΩ pull-down holds a signal at LOW when nothing is driving it. This prevents “floating” inputs that can randomly change state. It is often used with buttons, sensor outputs, and enable pins. The value is strong enough to define a clear level without making the circuit heavy.

3. Transistor biasing in small-signal stages

In BJT or MOSFET driver sections, 4.7 kΩ is often used to set a bias path for a base/gate node. It helps control how strongly a control signal drives the transistor input. Many choose it when they want a firm control path without excessive drive current. It also helps keep the input from staying charged when the driving signal disconnects.

4. Voltage divider for reference or sensing nodes

A 4.7 kΩ resistor is commonly paired with another resistor to form a divider for a predictable node voltage. It is used for input scaling, reference setting, and sensor readout circuits. The value is practical because it does not require very large components and still keeps divider current moderate. It’s also easy to match with many standard resistor values.

5. Signal line damping or mild loading

In some signal paths, 4.7 kΩ is used as a light load to reduce unwanted floating or to shape a node’s behavior. It can help calm small noise pickup on high-impedance lines. This is common around analog inputs and comparator inputs. The goal is a steadier node without turning it into a heavy load.

How to Test a 4.7 kΩ Resistor Using a Multimeter?

Figure 5. Measuring a Resistor Using a Digital Multimeter

A quick multimeter check confirms whether a resistor is near its expected value. This is helpful when troubleshooting or sorting parts.

Step 1: Set up the multimeter correctly

Turn the multimeter on and set it to the resistance (Ω) mode. If your meter is manual-range, select a range above 4.7 kΩ, such as 20 kΩ. Make sure the probes are plugged into the correct ports (COM and Ω). Touch the probe tips together briefly to see that the meter responds normally.

Step 2: Isolate the resistor before measuring

For the most accurate reading, the resistor should be measured out of circuit. If it is still soldered on a board, other parts can create parallel paths that change the reading. If removal is not possible, lift one leg of the resistor so it is no longer fully connected. This step prevents false readings that look too low.

Step 3: Measure the resistance value

Hold one probe on each lead of the resistor. Keep steady contact so the value does not jump due to poor connection. Read the displayed resistance and note whether it is close to 4.70 kΩ. A small drift is normal depending on the resistor’s tolerance.

Step 4: Judge the result using an expected range

Compare the reading to the resistor’s tolerance if you know it. For a common ±5% part, a normal range is about 4.465 kΩ to 4.935 kΩ. For a ±1% part, a normal range is about 4.653 kΩ to 4.747 kΩ. If the meter shows OL (open line) or a value far outside the expected range, the resistor may be damaged or the measurement setup may be wrong.

Comparing 4.7 kΩ vs 10 kΩ vs 47 kΩ Resistors

These three values are often used for the same “jobs” (like pull-ups, bias paths, and dividers), but they behave differently because resistance changes current and loading. The table below shows practical electrical differences and when each value is usually chosen.

Features	4.7 kΩ	10 kΩ	47 kΩ
Current at 5 V (I = V/R)	1.06 mA	0.50 mA	0.106 mA
Current at 12 V	2.55 mA	1.20 mA	0.255 mA
Resistance ratio to 4.7 kΩ	1×	2.13× higher	10× higher
Voltage drop across resistor at 1 mA	4.7 V	10 V	47 V
Power dissipation at 5 V (P = V²/R)	5.32 mW	2.50 mW	0.53 mW
Power dissipation at 12 V	30.6 mW	14.4 mW	3.06 mW
RC time constant with 100 nF capacitor	0.47 ms	1.00 ms	4.70 ms
RC cutoff frequency with 100 nF (fc = 1/2πRC)	339 Hz	159 Hz	33.9 Hz
Current change per 1 V increase	0.213 mA/V	0.100 mA/V	0.0213 mA/V
Output impedance contribution in divider	Low	Medium	High
Charging time to 63% with 100 nF	0.47 ms	1.00 ms	4.70 ms
Charging time to ~99% (≈5τ)	2.35 ms	5.00 ms	23.5 ms
Typical ADC source impedance effect	Minimal error	Acceptable error	Noticeable error possible
Sensitivity to leakage current (1 µA leakage error)	0.47% error	1.0% error	4.7% error
Relative signal settling speed	Fast	Moderate	Slow

Conclusion

The 4.7 kΩ resistor gives a balanced resistance that works well in many circuits. Its color code shows its value and accuracy, and a multimeter test confirms if it still works properly. It is often used to keep signals stable, control transistor inputs, and create fixed voltage levels. Compared to lower or higher values, it draws a moderate current and stays reliable, which is why it is widely used.