ALPS EC25 SRGP200200 Hollow Shaft Encoder 20-Position Volume Knob

ALPS EC25 SRGP200200 10-Pulse Hollow Shaft Rotary Encoder — 20-Position Car Audio Volume Control Switch

Upgrade or replace your car audio volume control with this precision ALPS EC25 SRGP200200 Hollow Shaft Rotary Encoder. Featuring 10 pulses per revolution and 20 detent positions, this encoder delivers smooth, accurate volume adjustment for automotive head units, aftermarket stereos, and a wide range of electronics projects. Built to ALPS' renowned quality standards, it offers reliable tactile feedback and consistent performance — exactly what audiophiles and DIY electronics enthusiasts demand.

Key Features

• Model: ALPS EC25 SRGP200200
• Type: Hollow shaft incremental rotary encoder
• Pulse Count: 10 pulses per revolution
• Positions: 20 detent positions for precise control
• Application: Car audio volume control, automotive electronics, DIY audio builds
• Material: Durable PVC construction
• Condition: Brand new, high quality
• Package Includes: 1 × ALPS EC25 SRGP200200 Hollow Shaft Encoder

Why Choose This Rotary Encoder?

ALPS is a globally recognized manufacturer of high-quality electronic components trusted by OEM automotive and consumer electronics brands worldwide. The EC25 series encoder is widely used in head units and audio mixing equipment for its long service life and smooth rotational feel. Whether you're repairing a factory stereo, building a custom car audio system, or prototyping an electronics project, this encoder is a drop-in solution that delivers professional-grade results.

Compatibility & Applications

• Car stereo head units & infotainment systems
• Aftermarket audio amplifiers and receivers
• DIY audio control panels
• Arduino, Raspberry Pi, and maker board projects
• General electronics volume/parameter control

Made in Mainland China.

Important Notes

• Due to manual measurement, please allow a tolerance of 1–3 mm.
• Colors may vary slightly from product images due to different monitor settings.

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External Resource

For guidance on safe handling of electronic components in automotive applications, refer to the U.S. Consumer Product Safety Commission (CPSC) for consumer electronics safety information.

Learn more: Encoder

Frequently Asked Questions

Q: What is the ALPS EC25 SRGP200200 hollow shaft encoder used for?

A: The ALPS EC25 SRGP200200 is a rotary encoder primarily used as a volume control switch in car audio systems, automotive head units, and aftermarket stereos. It is also suitable for DIY electronics projects, Arduino/Raspberry Pi builds, and any application requiring precise incremental rotary input with 20 detent positions.

Q: What does "10-pulse, 20-position" mean for this encoder?

A: This means the encoder generates 10 electrical pulses per full 360° revolution, and has 20 physical detent (click) positions. Each detent step represents one increment of adjustment, giving you smooth, tactile control over volume or other parameters.

Q: Is this encoder compatible with my car stereo or head unit?

A: The ALPS EC25 SRGP200200 is a widely used standard component found in many OEM and aftermarket car audio head units. It is best to verify your specific unit's encoder specifications (shaft diameter, pin configuration, and pulse count) before ordering to ensure compatibility.

Q: How many encoders are included in one order?

A: Each order includes 1 × ALPS EC25 SRGP200200 Hollow Shaft Rotary Encoder.