JST PH vs SH: Key Differences, Specs & Which to Choose
The JST PH (2.0mm) and JST SH (1.0mm) are two of the most popular JST connector series in electronics — but they're often confused by beginners. This guide breaks down the key differences in pitch, size, current rating, and application so you can choose the right one for your project.
Quick Comparison Table
| Feature | JST SH | JST PH |
|---|---|---|
| Pitch | 1.0mm | 2.0mm |
| Current rating | 1A | 2A |
| Wire AWG | 28–32 | 24–32 |
| Mount type | SMD | Through-hole |
| Locking | Friction / side latch | Standard latch |
| Common use | Drones, laptops, wearables | LiPo batteries, Arduino, sensors |
| Pin count | 2–15 | 2–16 |
| Size | Ultra-compact | Compact |
JST SH (1.0mm Pitch)
The JST SH is one of the smallest connector series JST manufactures. With a 1.0mm pitch, it is designed for ultra-compact applications where space is critical. See full specs in our JST Connector Models Guide.
Key specs:
- Pitch: 1.0mm
- Current: 1A per contact
- Wire AWG: 28–32
- Mount: SMD (surface mount)
- Locking: Friction lock or side latch (wings)
Common applications:
- FPV drones and quadcopters
- Laptop internal connections
- Wearable electronics
- Compact IoT sensors
- Pixhawk/ArduPilot telemetry ports (UART, I2C, SPI)
JST PH (2.0mm Pitch)
The JST PH is one of the most widely used JST series in hobbyist electronics. Its 2.0mm pitch makes it larger and easier to handle than SH, while still being compact enough for most portable devices.
Key specs:
- Pitch: 2.0mm
- Current: 2A per contact
- Wire AWG: 24–32
- Mount: Through-hole
- Locking: Standard positive latch
Common applications:
- LiPo battery packs (RC hobby, drones)
- Arduino sensor connections
- Small robots and rovers
- Compact consumer electronics
- Battery management systems (BMS)
Key Differences Explained
1. Pitch (Most Important)
SH uses 1.0mm pitch — exactly half of PH's 2.0mm. This means they are physically incompatible and cannot be mated with each other. Not sure which pitch you have? Use our JST connector identification guide to measure and confirm.
2. Current Rating
PH supports 2A per contact vs SH's 1A. For power-hungry applications such as battery wiring, PH or larger series like XH are the safer choice.
3. Wire Gauge
SH requires thinner wire (AWG 28–32). Using thicker wire risks damaging the connector housing. PH accepts a wider range (AWG 24–32), making it more versatile.
4. Mounting Style
SH connectors use SMD mounting — they are soldered directly to PCB pads. PH connectors use through-hole mounting — pins go through the PCB and are soldered on the back. This affects PCB design requirements.
5. Size
SH is significantly smaller than PH. If you're working with a tight PCB layout or miniaturized device, SH is the better choice. For prototyping and breadboard-friendly projects, PH is easier to handle.
Which Should You Choose?
Choose JST SH if:
- You need ultra-compact connections
- Your application is weight-sensitive (drones, wearables)
- You're working with thin wire (AWG 28–32)
- Your PCB uses SMD design
- Current draw is under 1A per pin
Choose JST PH if:
- You need a reliable, easy-to-handle connector
- You're connecting LiPo batteries or sensors to Arduino
- You need up to 2A per contact
- You're prototyping and want easier assembly
- Your PCB uses through-hole design
Are JST PH and SH Interchangeable?
No. JST PH and SH have different pitches (2.0mm vs 1.0mm), different housing sizes, and different mounting styles. They cannot be mated with each other. Always verify the series before ordering replacement cables or connectors. Use our JST connector identification guide if you're unsure which series you have.
Related Guides
- 📌 12 Most Common JST Connector Types: SH, GH, PH, XH, VH & More
- 📌 How to Identify JST Connectors: Pitch, Series & Pin Count Guide
- 📌 JST Connector Models Explained: How to Choose the Right Series
- 📌 JST XH Connector: Complete Guide & FAQ
- 📌 JST VH Connector: Complete Guide to Types, Pinout & Specs
Frequently Asked Questions
What is the difference between JST PH and SH?
JST PH has a 2.0mm pitch and 2A rating, while JST SH has a 1.0mm pitch and 1A rating. They are not interchangeable. For a full series comparison, see our JST Connector Models Guide.
Can I use JST SH instead of JST PH?
No. The pitch difference (1.0mm vs 2.0mm) means the connectors are physically incompatible. Using the wrong connector risks damaging your device.
Which JST connector does Arduino use?
Most Arduino boards use JST PH (2.0mm) for battery connections. The Arduino Nano 33 IoT uses JST SH (1.0mm) for the ESLOV connector.
Where can I buy JST PH and SH connectors?
Browse our JST Connector collection for both PH and SH series, including pre-crimped cables and connector kits. Ships worldwide.