In the world of electronics manufacturing and PCB design, selecting the wrong connector pitch can lead to costly re-works or entire batches of scrapped boards. Two of the most commonly confused series are the JST XH и JST PH. While they look similar at a glance, their technical specifications and physical footprints differ significantly.
At SCONDAR, we provide high-quality, fully compatible alternatives—the SCT2501 (XH compatible) и SCT2001 (PH compatible) series—to help engineers optimize their designs for both performance and cost. This guide breaks down the essential differences to help you make the right choice.
1. The Fundamental Difference: Pitch and Size
The most critical distinction between these two series is the Pitch (the center-to-center distance between adjacent pins).
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Серия JST XH: Features a 2.50mm pitch.
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Note: It is frequently mistaken for 2.54mm (0.1″). While they may fit in small pin counts, the 0.04mm difference accumulates, making them incompatible for larger headers.
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Серия JST PH: Features a 2.0mm pitch.
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It is specifically designed for high-density connections where PCB real estate is limited.
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2. Technical Specifications Comparison
Before finalizing a wire-to-board connection, engineers must evaluate the current-carrying capacity and voltage ratings.
| Характеристика | JST XH (SCT2501) | JST PH (SCT2001) |
| Pitch | 2.50 mm | 2,0 мм |
| Текущий рейтинг | 3A AC/DC (with AWG #22) | 2A AC/DC (with AWG #24) |
| Номинальное напряжение | 250V AC/DC | 100V AC/DC |
| Applicable Wire | AWG #30 to #22 | AWG #32 to #24 |
| Mounting Height | 9.8 mm (Top entry) | 8.0 mm (Top entry) |
3. When to Choose JST XH?
Сайт XH series is considered the “workhorse” of the connector world. You should choose XH when:
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Higher Current is Needed: It safely handles up to 3A, making it ideal for power delivery.
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Standard Applications: It is the industry standard for 3D printers, LiPo battery balance leads, and home appliances.
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Долговечность: The larger size offers better mechanical strength and is easier to handle during manual crimping or assembly.
4. When to Choose JST PH?
Сайт PH series is built for miniaturization. It is the go-to choice when:
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Space is Premium: If your PCB is crowded with components, the 2.0mm pitch saves significant space.
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Low Power Applications: Perfect for sensors, small drones, handheld medical devices, and LED modules.
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Thin Enclosures: The lower mounting height (8.0mm vs 9.8mm) allows for thinner device profiles.
5. SCONDAR’s Quality Assurance: The “Triple No” Philosophy
Reliability is non-negotiable in industrial and automotive applications. Every SCONDAR connector and harness assembly follows our strict quality protocol:
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No Defect Accepted: Rigorous inspection of all raw terminals and housings.
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No Defect Manufactured: 100% automated crimping with integrated pull-force monitoring.
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No Defect Released: Every harness undergoes 100% continuity and high-voltage (Hi-Pot) testing.
FAQ: Common Technical Questions
Q: Can I plug a JST PH wire into a JST XH header?
No. The pitch difference (2.0mm vs 2.50mm) makes it physically impossible to mate them without damaging the pins or the housing.
Q: Is JST XH compatible with 2.54mm (0.1″) headers?
Technically, no. While a 2-pin XH connector might “force” onto a 2.54mm header, the misalignment will prevent proper mating for any connector with 3 or more pins. Always match the pitch precisely.