40PCS WH148 Rotary Potentiometer Kit B5K-B100K + 20 Knobs
40PCS WH148 Rotary Potentiometer Kit B5K-B100K + 20 Knobs
Get everything you need for precise resistance control in one convenient kit. This 40-piece WH148 rotary potentiometer assortment includes five resistance values — B5K, B10K, B20K, B50K, and B100K — plus 20 colorful knob covers, shaft nuts, and a handy storage box. Whether you're a hobbyist, electronics student, or seasoned engineer, this kit delivers reliable performance for audio circuits, dimmers, signal control, and countless DIY projects.
Why Choose This Potentiometer Kit?
- 5 Resistance Values Included: 4 pcs each of B5K, B10K, B20K, B50K, and B100K — 20 potentiometers total across a wide resistance range (1K–500K Ω).
- 20 Color-Coded Knob Covers: 4 each in black, white, red, yellow, and blue — making it easy to visually organize your builds at a glance.
- Precision Linear Taper (Type B): The B-taper characteristic provides smooth, accurate resistance adjustment for fine-tuned control in your circuits.
- Durable Cermet / Metal Alloy Construction: Built for longevity with a rated rotational life of 10,000 cycles and a robust 300° rotation angle.
- Easy No-Tool Installation: Standard 3-pin through-hole design with a 6mm knurled shaft and 7mm mounting thread — fits most standard panel cutouts without specialized equipment.
- Wide Compatibility: Perfect for audio volume controls, light dimmers, signal generators, Arduino/Raspberry Pi projects, guitar pedals, and general electronic circuits.
Technical Specifications
| Model | WH148 |
| Resistance Range | 1K – 500K Ω |
| Resistance Values Included | B5K, B10K, B20K, B50K, B100K (4 pcs each) |
| Resistance Tolerance | ±20% |
| Taper Characteristic | B (Linear) |
| Max Operating Voltage | AC 150V |
| Rated Power | 0.125W |
| Rotation Angle | 300° ± 5° |
| Rotational Life | 10,000 cycles |
| Rotation Noise | <47mV |
| Residual Resistance | <20Ω (Terminals 1-2 & 2-3) |
| Insulation Resistance | >100MΩ at DC500V |
| Rotating Torque | 20 – 200 gf·cm |
| Shaft Diameter | 6mm (knurled) |
| Mounting Thread Diameter | 7mm |
| Base Size | 16 × 7mm |
| Knob Size | 15 × 17mm |
| Total Shaft Length | 25mm |
| Package Dimensions | 170 × 95 × 23mm (6.69 × 3.74 × 0.91 in) |
| Pin Configuration | 3-Pin |
| Country of Origin | Made in China |
What's in the Box
- 4 × B5K Potentiometer
- 4 × B10K Potentiometer
- 4 × B20K Potentiometer
- 4 × B50K Potentiometer
- 4 × B100K Potentiometer
- 4 × Black Knob Covers
- 4 × White Knob Covers
- 4 × Red Knob Covers
- 4 × Yellow Knob Covers
- 4 × Blue Knob Covers
- Shaft nuts & storage box included
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Frequently Asked Questions
Q: What resistance values are included in the WH148 potentiometer kit?
A: The kit includes 20 rotary potentiometers across five resistance values — 4 pcs each of B5K, B10K, B20K, B50K, and B100K — covering a broad range from 5K to 100K ohms, suitable for a wide variety of electronic circuits and DIY projects.
Q: Are the knobs included and do they fit the WH148 shaft?
A: Yes! The kit includes 20 knob covers (4 each in black, white, red, yellow, and blue) designed to fit the standard 6mm knurled shaft of the WH148 potentiometer. Simply press them onto the shaft for a secure, professional-looking finish.
Q: What applications are these WH148 rotary potentiometers suitable for?
A: These potentiometers are ideal for audio volume and tone controls, light dimmers, signal generators, Arduino and Raspberry Pi projects, guitar effect pedals, and general-purpose electronic circuits requiring variable resistance adjustment up to AC 150V at 0.125W rated power.
Q: What is the difference between the B-taper and A-taper potentiometers?
A: The B-taper (also called linear taper) provides a uniform, proportional change in resistance as you rotate the shaft — making it ideal for precise signal control and measurement applications. The A-taper (audio/logarithmic) is tuned to human hearing perception and is commonly used for audio volume knobs. This kit features B-taper potentiometers for linear, predictable adjustment.