Generic PH-4H High Current Probe, Crown Tip

A PH-4 series high-current test probe. High-current probes exist because an ordinary ICT probe is a poor conductor: a thin plunger, a spring in the current path and a small contact footprint together add tens of milliohms and heat up under load. A PH-4 probe uses a heavier barrel and a broader contact to carry supply-level current into the DUT — power rails, charger and battery contacts, motor drives and load test — without the voltage drop and temperature rise that a signal probe would suffer.

In a fixture these are normally deployed sparingly: a handful of high-current contacts on the power nets alongside a field of ordinary probes on the signal nets. Because they are coarser and stiffer than a signal probe, allow for their larger keep-out and their higher individual spring force when laying out the probe plate.

• PH-4 series high-current spring probe, H tip variant
• Sold per unit

Detailed stroke, spring force, current rating and tip dimensions are not recorded against this part number. Confirm them with FixturFab before designing this part into a fixture.