The Challenge of Non-Standardized 2-Pin Fan Connectors

Cooling fans are essential in modern electronics, often the only moving parts that maintain functionality in an otherwise solid state device. Despite their importance, these fans are the shorted rated service life components and are frequently the first component to fail. Unlike the standardized 4-pin fans found in desktop ATX computers, the broader electronics market lacks a universal standard for 2-pin fan connectors. This results in a confusing variety of connector types and wiring arrangements, making replacements difficult.

Adding to the frustration, finding the exact fan SKU to replace the original component is often difficult or even impossible. Fan manufacturers often customize their products to specific requirements such as CFM, wire length, and connector type, limiting replacement options. Manufacturers have little incentive to standardize, document, or offer replacement parts, as perhaps they benefit more from customers purchasing entirely new devices once warranties expire. This undermines the right to repair, leaving consumers with few choices but to discard functional electronics due to simple compatibility issues, contributing to unnecessary waste.

Our Solution: Adapter Cables

At CRJ Electronics, we share your frustration with these challenges. That's why we've developed a range of 2-pin fan adapter cables designed to bridge the gap caused by connector incompatibility. Our products enable you to use a wider variety of available cooling fans as replacements, bypassing the limitations set by customized connectors and wiring. With our adapter cables, you can get your electronics back up and running, support your right to repair, and extend the lifespan of your devices without the hassle.

KK 254 Series Connector

Originally designed by Molex under the KK tradename these 0.1" / 2.54mm pitch connectors have become the standard for ATX computer fans.

A specific PC fan variant features a 3-pin locating tab that serves as polarity protection

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SKU 4054

KK 2-Pin to 3-Pin Adapter

Designed to allow 2-pin fans to connect to 3-pin headers, bypassing the physical compatibility issue caused by the locating tab

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XH Series Connector

The XH series connector, originally designed by JST, is the most commonly used connector for 2-pin cooling fans.

With a 2.5mm pin pitch and 3A current rating it's specification meets the requirements for many manufacturers.

SKU 4051

XH 2-Pin to 4-Pin Fan Adapter

Connect standard 3-pin and 4-pin computer fans to XH 2-pin headers

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SKU 4052

3-Pin Header to XH 2-Pin Fan

Connect XH 2-pin fans to standard 3-pin fan headers

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PH Series Connector

The PH series connector, originally designed by JST, is the most common connector used on modern graphics cards.

It's use extends beyond graphics cards as Gigabyte small form factor ITX motherboards now feature this fan connector as well.

Due to its widespread adoption, we have developed several cables for this connector.

SKU 4065

PH 2-Pin to 4-Pin Fan Adapter

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SKU 4072

XH to PH Adapter

Connect XH fans to PH headers

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SKU 4073

PH to XH Adapter

Connect PH fans to XH headers

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