28Pin Natural Wire Harness Connector with Terminals – Automotive Connector with TPA for Select Toyota Models

The TS30101-28P-21-4 is a 28-pin natural-colored female automotive connector designed specifically for seamless integration into select Toyota vehicle platforms. Featuring an integrated Terminal Position Assurance (TPA) system, this housing ensures secure terminal retention, minimizing the risk of signal loss or disconnection caused by vibration, thermal cycling, or mechanical stress. As a key component in factory audio and control wire harness systems, it enables reliable, non-invasive upgrades for car stereos, navigation units, and auxiliary electronics in cars, yachts, UTVs, and off-road vehicles.

This connector is the female counterpart to the mating plug TS30101-28P-11-4, allowing for clean, plug-and-play compatibility with original equipment configurations. The natural (beige/light gray) housing color provides a clean, OEM-matching appearance and simplifies identification during complex harness installations or repairs.

Product Specifications Overview

TPA vs Non-TPA Series – Key Design Differences

Zhejiang Tongsheng Electronic offers two distinct versions of the TS30101-28P connector series: one with Terminal Position Assurance (TPA) and another without. The TPA-equipped model (TS30101-28P-21-4) includes a secondary locking mechanism that slides into place after terminal insertion, ensuring long-term reliability in high-vibration environments. The non-TPA version lacks this feature, making it suitable only for low-stress applications. Additionally, the physical dimensions and internal locking geometry differ slightly between the two series, meaning they are not interchangeable. Always verify your vehicle’s harness requirements before selection.

High-Strength Materials for Automotive Durability

The connector housing is precision-molded from either PBT+GF15% or PA66+GF30%, both engineered to withstand extreme temperatures (-40°C to +120°C), UV exposure, and chemical contact. These glass-fiber-reinforced plastics resist warping and cracking, ensuring a secure fit over time. The internal terminals are crafted from high-conductivity copper alloy, brass, or phosphor bronze, delivering excellent signal transfer and corrosion resistance for long-term audio and data integrity.

Custom Solutions for Brand Integration

We support full OEM and ODM manufacturing for companies developing branded wire harness kits or requiring custom connector modifications. Our services include mold creation, private labeling, technical documentation, and packaging design. Whether you need a small prototype batch or large-volume production, we provide scalable, quality-assured solutions tailored to your project’s needs.

Rigorous Quality Standards and Compliance

All connectors are manufactured under strict IATF 16949 (automotive quality), ISO14001 (environmental management), and RoHS (hazardous substance restrictions) standards. Each unit undergoes 100% inspection prior to dispatch, including checks for terminal alignment, TPA functionality, housing integrity, and mating compatibility. This ensures every TS30101-28P-21-4 meets the high reliability expected in modern automotive electronics.

About TSCN – Your Trusted Automotive Connector Partner

Zhejiang Tongsheng Electronic Co., Ltd. (TSCN) has specialized in Automotive Electrical Connectors since 1998. With decades of experience, we deliver durable, precision-engineered components trusted by installers, distributors, and OEMs worldwide. Our product line supports a wide range of vehicle integration projects, from factory audio upgrades to marine and off-road control systems.

Get in Touch for Technical Details

For pinout diagrams, sample requests, compatibility verification, or bulk pricing, please contact us at mandy@tscn.com.cn. Our technical team is ready to assist with product selection, customization options, and engineering support for your next automotive wiring project.

Discover Our Full Range of Automotive Connectors

Explore our complete catalog to find compatible housings, terminals, and harness solutions for Toyota, Lexus, and other vehicle platforms. Whether you need TPA-equipped connectors or custom designs, TSCN provides reliable, high-performance components for every stage of vehicle electronics integration.