DuPont Connector vs JST PH 2.0: Pinout, Specs & Which to Use (2026)
Quick Answer
DuPont (2.54mm pitch, no latch) is best for breadboard prototyping and Arduino jumper wires. JST PH (2.0mm pitch, latching) is better for compact, vibration-resistant connections in drones, RC cars, and portable electronics.
Overview: DuPont vs JST PH 2.0
Two of the most common connectors in electronics prototyping are the DuPont 2.54mm and the JST PH 2.0mm. At first glance they look similar — both are small, low-voltage wire-to-board connectors used heavily in Arduino and hobby electronics. But they serve different purposes, and choosing the wrong one can cause loose connections, mating failures, or wasted time re-crimping.
This guide breaks down every key difference so you can pick the right connector the first time.
Specs Comparison Table
| Specification | DuPont 2.54mm | JST PH 2.0mm |
|---|---|---|
| Pitch | 2.54mm (0.1") | 2.0mm |
| Locking Mechanism | None (friction only) | Positive latch |
| Rated Current | 1A per contact | 2A per contact |
| Rated Voltage | 250V AC | 100V AC |
| Wire Gauge | 22–28 AWG | 24–32 AWG |
| Pin Count | 1–40+ | 2–16 |
| Mating Cycles | ~30 | 30+ |
| Polarized | No | Yes |
| Breadboard Compatible | Yes (0.1" grid) | No |
| Typical Application | Jumper wires, Arduino shields | LiPo batteries, drones, RC |
Pinout & Physical Differences
The most obvious difference is pitch: DuPont uses the industry-standard 2.54mm (0.1 inch) spacing, which aligns perfectly with breadboard holes and Arduino headers. JST PH uses a tighter 2.0mm pitch, making it more compact but incompatible with standard breadboards without an adapter.
JST PH housings have a positive locking latch — you press a tab to disconnect. DuPont connectors rely purely on friction, which means they can pull out accidentally under vibration or cable tension. For any mobile or vibrating application, JST PH wins on retention.
JST PH is also polarized — the housing is keyed so it can only mate one way, preventing reverse polarity. DuPont has no polarity key, so incorrect insertion is possible if you're not careful.
When to Use DuPont 2.54mm
Choose DuPont when:
- You need breadboard compatibility — 2.54mm fits standard 0.1" headers directly
- You're building Arduino prototypes with frequent connect/disconnect cycles
- You need custom pin counts — DuPont housings are available in 1–40+ positions
- You want low-cost, fast assembly for lab or development use
- You're using jumper wires between modules on a bench
🛒 Need a complete DuPont kit? Browse our 2.54mm DuPont Jumper Wire Connector Kit — includes male/female housings and pre-crimped wires.
When to Use JST PH 2.0mm
Choose JST PH when:
- You need a secure, latching connection that won't pull out under vibration
- You're connecting LiPo or Li-ion battery packs (JST PH is the standard for small RC and drone batteries)
- You need polarized mating to prevent reverse polarity damage
- Space is limited and you need a more compact connector than 2.54mm
- You're building production-ready or semi-permanent assemblies
🛒 Shop our JST XH 2.54mm Connector Kit or JST GH 1.25mm Kit for compact latching options.
Can You Use DuPont and JST PH Together?
Not directly — the pitch and housing are incompatible. However, you can use adapter cables specifically designed to bridge the two systems. Our JST PH 2.0mm to DuPont 2.54mm Adapter Connector Kit is the perfect solution — it lets you connect JST PH-equipped sensors, batteries, or modules directly to Arduino headers or any DuPont 2.54mm interface without re-crimping.
Crimping: DuPont vs JST PH
Both connectors require crimping tools, but the process differs slightly:
- DuPont: Uses a standard 2.54mm crimp terminal. The Engineer PA-09 or IWISS SN-025 work well. Terminals insert into the housing from the rear.
- JST PH: Uses a smaller 2.0mm crimp terminal. Requires a finer-jaw crimper. The Engineer PA-21 or IWISS SN-2549 are recommended.
For a full step-by-step crimping walkthrough, see our guide: How to Crimp JST Connectors: Step-by-Step Guide for XH, PH & SH.
Frequently Asked Questions
Is DuPont the same as JST?
No. DuPont (2.54mm) and JST are different connector families from different manufacturers. They are not cross-compatible. JST makes many series (SH, GH, PH, XH) at different pitches; DuPont refers specifically to the generic 2.54mm crimp housing widely used in hobby electronics.
Can I plug a DuPont connector into a JST PH socket?
No — the pitch difference (2.54mm vs 2.0mm) means the pins won't align. Forcing them can damage both connectors.
Which connector is better for Arduino?
DuPont 2.54mm is the standard for Arduino because it matches the 0.1" header pitch. JST PH requires an adapter or custom PCB footprint to connect to Arduino headers.
Which is more reliable for permanent installations?
JST PH — the positive latch and polarized housing make it significantly more reliable in permanent or semi-permanent assemblies compared to friction-only DuPont connectors.
Summary
Use DuPont 2.54mm for breadboard prototyping, Arduino development, and any application where breadboard compatibility and easy reconfiguration matter. Use JST PH 2.0mm for compact, secure, polarized connections in drones, RC vehicles, battery packs, and production assemblies.
Both connectors have their place in a well-stocked electronics lab — the key is matching the connector to the application.
Shop · DuPont 2.54mm Kit · DuPont M/F Kit 22AWG · JST PH to DuPont Adapter Kit