WH158-4

WH158-4

Product Overview

The WH158-4 is an ultra-thin, edge-driven potentiometer featuring a flat dial design with the edge exposed. It’s specifically engineered for miniature portable electronic devices where space is extremely limited. This product replaces the traditional rotary shaft of conventional potentiometers with a horizontally extended flat plastic disc; once installed, the disc’s edge protrudes from the device’s housing. Users can adjust resistance by flicking the disc’s edge, providing excellent tactile feedback even when operating blind. The resistor element typically employs a carbon film structure, with a thickness of only 2mm to 4mm, achieving an exceptionally high degree of height-space compression. It perfectly fits into compact portable electronic enclosures with stringent thickness requirements, while also meeting the biocompatibility and miniaturization standards of medical-grade hearing aids. This design helps reduce product volume by up to 20% and enhances wearing comfort.

Operating Principle

This potentiometer is based on the core principles of rotary potentiometers, but replaces the traditional long shaft with a horizontally extended flat plastic disc. After installation, the disc’s edge remains visible outside the device housing. Users don’t need to see the potentiometer itself—simply flicking the disc’s edge moves the internal sliding contact along the resistor track, precisely adjusting resistance. By eliminating the protruding long shaft found in conventional designs, this approach not only achieves resistance adjustment but also maximizes height-space reduction, all while delivering convenient blind operation.

Key Performance Parameters

1. Resistor material: Carbon film
2. Product thickness: 2mm–4mm, with a minimum achievable below 2mm
3. Standard resistance value: 10kΩ
4. Rated power: 0.05W
5. Physical dimensions: Minimum diameter of 10mm and thickness of 2mm
6. Compliance standard: Meets biocompatibility requirements for medical-grade hearing aids

Core Advantages

1. Ultra-thin design: With a thickness of only 2mm–4mm, and a minimum below 2mm, it offers exceptional height-space compression, easily fitting into tightly constrained portable electronic housings. This solves the longstanding challenge of using conventional long-shaft potentiometers in ultra-thin devices.
2. Excellent blind-operation feel: Featuring an exposed-edge flat dial design, users can adjust resistance simply by flicking the disc’s edge without visual confirmation, making it especially suitable for ear-worn or pocket-sized devices.
3. Medical-grade compliance: Meets biocompatibility requirements for medical-grade hearing aids, allowing safe use in personal medical devices such as hearing aids, ensuring user safety.
4. Supports product miniaturization: With minimal physical dimensions of 10mm diameter and 2mm thickness, it helps reduce overall product volume by up to 20%, significantly improving portability and wearing comfort.
5. Stable and durable performance: The carbon-film resistor structure ensures stable operation, with a rated power of 0.05W, meeting the low-power adjustment needs of miniature electronics and delivering reliable long-term performance.

Core Value Proposition

1. Its ultra-thin structure breaks spatial limitations, enabling ultra-thin industrial designs for miniature portable electronics without requiring extra height space for potentiometers.
2. The blind-operation design enhances user experience, particularly for devices like hearing aids and in-ear headphones that cannot be operated visually, offering greater convenience.
3. Medical-grade compliance ensures safe application, allowing direct integration into personal medical devices such as hearing aids without additional regulatory testing.
4. Helps reduce product volume by 20%, improving portability and wearing comfort, thereby boosting market competitiveness.

Target Customer Base

Hearing aid manufacturers, portable pocket radio producers, handheld gaming peripheral suppliers, over-ear headphone makers, and other companies focused on developing and producing miniature ultra-thin electronic devices. These businesses typically face strict height-space constraints while demanding ease of operation and compliance. This potentiometer perfectly aligns with their product design needs.

Application Scenarios

Specifically designed for miniature ultra-thin electronic devices, this potentiometer is primarily used in the following scenarios: adjusting volume on behind-the-ear hearing aids, leveraging its ultra-thin form factor to integrate seamlessly into the hearing aid housing, allowing users to conveniently control volume through blind operation; controlling volume via wired in-ear headphones, adapting to the ultra-thin design of headphone controls so users can easily adjust volume while wearing them; fine-tuning screen backlight brightness on retro handheld gaming consoles, embedded within the console’s slim body, enabling users to adjust backlight intensity according to ambient lighting conditions for an enhanced user experience. Additionally, it can be applied to other miniature electronic products with limited height space that require blind-adjustment functionality.

Solving Industry Pain Points

In the development and production of miniature, ultra-thin electronic devices, the long shaft of traditional rotary potentiometers has long been a major design challenge: the protruding shaft cannot fit into ultra-thin housings, forcing awkward installations that compromise the overall design and may even render the device unportable. The WH158-4 potentiometer elegantly resolves this issue by adopting a flat dial edge-drive design, completely eliminating the long shaft and compressing the height to just 2mm–4mm, thus satisfying both “hidden” and “edge-sliding” industrial design requirements. Meanwhile, its blind-operation feature addresses the difficulty users face when operating personal, portable devices without visual access, and its medical-grade compliance tackles the safety adaptation challenges of hearing aids and other medical devices, comprehensively meeting the design and usage needs of miniature ultra-thin electronics.

Common Questions FAQ

Q1: What is the thickness range of the WH158-4 potentiometer?
A: The typical thickness of this potentiometer is 2mm–4mm, with a minimum achievable below 2mm, satisfying the space requirements of most ultra-thin electronic devices.
Q2: Is this potentiometer suitable for hearing aid applications?
A: Yes, it meets medical-grade biocompatibility and miniaturization requirements for hearing aids, safely supporting volume adjustment in behind-the-ear hearing aids and helping reduce hearing aid volume by up to 20%, enhancing wearing comfort.
Q3: How do users operate this potentiometer?
A: After installation, the edge of the flat dial protrudes from the device housing. Users don’t need to look directly at it—simply flicking the disc’s edge adjusts resistance, providing excellent tactile feedback during blind operation.
Q4: What is the standard resistance value of this potentiometer?
A: The standard resistance value is 10kΩ, with a rated power of 0.05W, sufficient to meet the low-power adjustment needs of miniature electronic devices.