WH158-4-2

WH158-4-2

Product Overview

The WH158-4-2 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 rotating shaft of a rotary potentiometer with a horizontally extending 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 blindly. 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 a rotary potentiometer, but replaces the conventional long rotating shaft with a horizontally extending flat plastic disc. After installation, the disc’s edge remains visible outside the device housing. Users don’t need to see the potentiometer itself—by simply flicking the disc’s edge with their fingers, they can move the internal sliding contact along the resistor element, precisely adjusting resistance. This design eliminates the traditional protruding long shaft found in conventional potentiometers, achieving both resistance adjustment and maximum height-space reduction, while delivering convenient blind operation.

Key Performance Parameters

1. Resistor Material: Carbon Film
2. Product Thickness: 2mm–4mm, with minimum possible thickness under 2mm
3. Standard Resistance Value: 10kΩ
4. Rated Power: 0.05W
5. Physical Dimensions: Minimum diameter 10mm, thickness 2mm
6. Compliance Standards: Meets biocompatibility requirements for medical-grade hearing aids

Core Advantages

1. Ultra-Thin Design: With a thickness of only 2mm–4mm, and a minimum achievable below 2mm, this product offers exceptional height-space compression, easily fitting into tightly constrained portable electronic housings. It solves the longstanding challenge of traditional long-shaft potentiometers being incompatible with ultra-thin devices.
2. Excellent Blind Operation: Featuring an edge-exposed flat dial design, users can adjust resistance simply by flicking the disc’s edge without visual confirmation, making it especially convenient for devices worn on the ear or carried in pockets.
3. Medical-Grade Compliance: Meeting biocompatibility requirements for medical-grade hearing aids, this product can be safely used in hearing aids and other close-fitting medical electronics, ensuring user safety.
4. Supports Product Miniaturization: With minimum dimensions of 10mm in diameter and 2mm thick, it helps reduce overall product size by up to 20%, significantly improving the comfort and portability of portable devices.
5. Stable and Durable Performance: The carbon film resistor structure ensures stable operation, with a rated power of 0.05W, satisfying the low-power adjustment needs of miniature electronic devices 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 potentiometer integration.
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 use in hearing aids and other close-fitting medical devices without additional regulatory testing.
4. By reducing product volume by up to 20%, it improves the comfort and portability of portable devices, strengthening 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 enterprises 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 operation for adjustment.

Solving Industry Pain Points

In the research and production of miniature, ultra-thin electronic devices, the long rotating shaft of traditional rotary potentiometers has long been a major design bottleneck: the protruding shaft cannot fit into ultra-thin housings, forcing awkward installations that compromise the overall design and sometimes render the device unusable. The WH158-4-2 potentiometer elegantly resolves this issue by adopting a flat dial edge-driven design, completely eliminating the long shaft and compressing the height to just 2mm–4mm, thus fulfilling the “hidden” and “edge-sliding” industrial design requirements of such devices. Meanwhile, its blind-operation feature addresses the challenge of users being unable to operate close-fitting, portable devices visually, and its medical-grade compliance tackles the safety adaptation challenges faced by hearing aids and other medical devices, comprehensively meeting the design and usage needs of miniature ultra-thin electronics.

Frequently Asked Questions (FAQ)

Q1: What is the thickness range of the WH158-4-2 potentiometer?
A: This potentiometer typically measures 2mm–4mm in thickness, 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 standards for hearing aids, making it safe for use in behind-the-ear hearing aid volume adjustment scenarios, while also helping reduce hearing aid volume by up to 20% and 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 the potentiometer—simply flick the disc’s edge with their fingers to adjust 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.