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Johnstech International - Kelvin Series for Pad and Leaded Devices


Pad ROL™200KR Kelvin-Ready Test Contactor
For QFN, DFN, and Other Pad-Style Applications

Ultimate Performance. Configurable Design.

The Johnstech Pad ROL™ 200KR Kelvin-Ready Contactor provides test engineers with unprecedented test objective versatility for their leaded devices. When populated with only force contacts, it has all the high performance features of the industry-leading, standard Leaded ROL™ 200.

But its Kelvin-Ready design accommodates field configurable sense contacts to be used for any given I/O, enabling precision Kelvin measurements and test system monitoring feedback loops to improve a wide variety of test objectives.

Wait, there’s more! All of these advantages come without the requirement to narrow load board traces like other Kelvin technologies do. Standard size load board traces will helps to minimize manufacturing expenses while maintaining production test reliability.

Solid Force Contact and Dual Touch
Sense Design

The Pad ROL™200KR guarantees a perfect, high current, low resistance connection every time. Its design is a unique combination of our traditional high current solid Pad ROL™ 200 Contact (the Force) and a dual touch, flexible Sense Contact that surrounds the Force on both sides. This design ensures a good Kelvin connection regardless of device variations.

Self Cleaning Wipe Action

Two self cleaning features ensure that the Pad ROL™200KR delivers the lowest and most repeatable Kelvin contact resistance available on the market today. The Force Contacts include the oxide removal wipe action of Johnstech’s patented ROL™ technology, which automatically prevents surface debris build-up on the Contact tip. In addition, the Force and Sense work in combination to remove debris between the two Contacts. These inherent wipe functions provide long Mean Time Between Assists (MTBA) and Contact life, lowering the overall cost of test.

Field Configurable Design

With its unique configurable feature, the Pad ROL™200KR Contactor lowers overall acquisition cost and provides the ultimate in customer flexibility and operating value. The “Kelvin-Ready” design allows you to configure and reconfigure your Contactor for standard contacting, “Selective Kelvin” or full Kelvin testing. Parts can be tested with both Kelvin and non Kelvin requirements.

Leaded ROL™200KR Kelvin-Ready Test Contactor
For QFP, SO, SOT, and Other Leaded-Style Applications

Ultimate Performance. Configurable Design.

The Johnstech Leaded ROL™ 200KR Kelvin-Ready Contactor provides test engineers with unprecedented test objective versatility for their leaded devices. When populated with only force contacts, it has all the high performance features of the industry-leading, standard Leaded ROL™ 200.

But its Kelvin-Ready design accommodates field configurable sense contacts to be used for any given I/O, enabling precision Kelvin measurements and test system monitoring feedback loops to improve a wide variety of test objectives.

Wait, there’s more! All of these advantages come without the requirement to narrow load board traces like other Kelvin technologies do. Standard size load board traces will helps to minimize manufacturing expenses while maintaining production test reliability.

Solid Force Contact and Dual Touch Sense Design

The Leaded ROL™200KR guarantees a perfect, high current, low resistance connection every time. Its design is a unique combination of our traditional high current solid Leaded ROL™ 200 Contact (the Force) and a dual touch, flexible Sense Contact that surrounds the Force on both sides. This design ensures a good Kelvin connection regardless of device variations.

Self Cleaning Wipe Action

Two self cleaning features ensure that the Leaded ROL™200KR delivers the lowest and most repeatable Kelvin contact resistance available on the market today. The Force Contacts include the oxide removal wipe action of Johnstech’s patented ROL™ technology, which automatically prevents surface debris build-up on the Contact tip. In addition, the Force and Sense work in combination to remove debris between the two Contacts. These inherent wipe functions provide long Mean Time Between Assists (MTBA) and Contact life, lowering the overall cost of test.

Field Configurable Design

With its unique configurable feature, the Leaded ROL™200KR Contactor lowers overall acquisition cost and provides the ultimate in customer flexibility and operatingvalue. The “Kelvin Ready” design allows you to configure and reconfigure your Contactor for standard contacting, “Selective Kelvin” or full Kelvin testing. Parts can be tested with both Kelvin and non Kelvin requirements.

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