JST Connectors: PH, XH, GH & SH Series Sourcing
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JST is a connector standard, and in China sourcing the practical issue is genuine JST versus clone housings: PH (2.0 mm pitch), XH (2.5 mm), GH (1.25 mm), and SH (1.0 mm) are the workhorse series for battery leads, sensor harnesses, and board-to-wire links. Clone connectors run looser tolerances, so a clone PH housing may not retain a genuine PH crimp reliably, and contact current ratings (typically 1-3 A for PH/XH) drop when the metal stamping is thinner. Match wire gauge to series — XH handles up to 22 AWG comfortably while SH is for fine 28-32 AWG — or you get cold crimps and intermittent contact.
When ordering JST assemblies from China, specify whether you require genuine JST-brand parts or accept compatible equivalents, because most cheap harness shops use clones by default. The common failure mode is mixed mating — a clone plug into a genuine header — causing high contact resistance and connector heating.
Wiki (1)
FAQ
What is the difference between JST PH, XH, GH, and SH?
They differ mainly by pitch: SH is 1.0 mm, GH 1.25 mm, PH 2.0 mm, and XH 2.5 mm. Smaller pitch means finer wires and lower current, so SH/GH suit signal lines while PH/XH handle battery and power leads.
Are Chinese JST connectors genuine or clones?
Most low-cost harness suppliers use clone housings unless you explicitly require genuine JST. Clones usually work but have looser tolerances and thinner contacts, so confirm if your application needs rated retention force and current.
How do I avoid crimp failures with JST harnesses?
Match wire gauge to the series, require machine crimping with pull-test data, and don't mix clone plugs with genuine headers. Ask for a crimp pull-force spec and sample units before mass production.
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