33 kΩ resistor color code
A 33 kΩ resistor is marked orange-orange-orange-gold on a 4-band (±5%) resistor and orange-orange-black-red-brown on a 5-band (±1%) resistor. Its SMD marking is 333 or 3302.
Reading the bands
| Band | 4-band (±5%) | 5-band (±1%) |
|---|---|---|
| 1 | Orange — 1st digit 3 | Orange — 1st digit 3 |
| 2 | Orange — 2nd digit 3 | Orange — 2nd digit 3 |
| 3 | Orange — Multiplier ×1k | Black — 3rd digit 0 |
| 4 | Gold — Tolerance ±5% | Red — Multiplier ×100 |
| 5 | — | Brown — Tolerance ±1% |
Check: 33 ×1k = 33 kΩ; 330 ×100 = 33 kΩ. A ±5% part measures between 31.35 kΩ and 34.65 kΩ.
Codes and series
| Schematic notation | 33k |
|---|---|
| SMD 3-digit | 333 |
| SMD 4-digit | 3302 |
| EIA-96 | none (not an E96 value) |
| E-series | E6, E12, E24 |
| Neighbouring E24 values | 30 kΩ and 36 kΩ |
Typical uses
A 33 kΩ resistor appears in RC filters, 555 timer circuits, op-amp feedback networks and dividers that need little current.
Current and power at common voltages
The current and heat in a 33 kΩ resistor depend on the voltage across the resistor itself (not necessarily the supply voltage). Choose a resistor rated at least twice the power shown.
| Voltage across it | Current | Power | Minimum rating |
|---|---|---|---|
| 3.3 V | 100 µA | 330 µW | 1/8 W |
| 5 V | 152 µA | 758 µW | 1/8 W |
| 9 V | 273 µA | 2.45 mW | 1/8 W |
| 12 V | 364 µA | 4.36 mW | 1/8 W |
| 24 V | 727 µA | 17.5 mW | 1/8 W |
Don't mix it up with
Values with the same digits differ only in the multiplier band, so check that band carefully:
| Value | 4-band code | Multiplier band |
|---|---|---|
| 330 Ω | Orange-Orange-Brown-Gold | Brown ×10 |
| 3.3 kΩ | Orange-Orange-Red-Gold | Red ×100 |
| 33 kΩ | Orange-Orange-Orange-Gold | Orange ×1k |
| 330 kΩ | Orange-Orange-Yellow-Gold | Yellow ×10k |
| 3.3 MΩ | Orange-Orange-Green-Gold | Green ×100k |
FAQ
What color code is a 33 kΩ resistor?
A 33 kΩ ±5% resistor is orange-orange-orange-gold (4 bands). A 33 kΩ ±1% resistor is orange-orange-black-red-brown (5 bands).
What is the SMD code for 33 kΩ?
333 on 3-digit (±5%) parts and 3302 on 4-digit (±1%) parts. It has no EIA-96 code because it is not an E96 value.
Is 33 kΩ a standard resistor value?
Yes, it is in the E6, E12, E24 series.
How much power does a 33 kΩ resistor dissipate at 5 V?
With 5 V across it, 758 µW (P = V² ÷ R). A 1/8 W or larger resistor is enough.
Open 33 kΩ in the calculator →All values
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