Specifications
| Pitch | 2.54 mm |
|---|---|
| Contacts | 1–25 |
| Rows | one |
| Current per contact | 4 A |
| Voltage | 250 V |
| Wire | AWG 30–22 |
| Latch | no, held by friction |
| Mating | wire-to-board |
| Maker | Molex |
| Housing | 2695 · 6471 (22-01-…) · 47054 |
| Contact | 2759 · 4809 |
| Board header | 6373 · 7395 · 47053 |
Standard pinouts
PC fan, 4 pins (Intel spec)
| Pin | Signal | Wire |
|---|---|---|
| 1 | GND | black |
| 2 | +12 V | yellow |
| 3 | sense | green |
| 4 | PWM | blue |
Lookalikes and how to tell them apart
Same 2.54 mm pitch as Dupont, but the header has a friction ramp and a wall, and the housing a polarising rib. JST XH is 2.5 mm.
| Connector | Pitch | Latch | Per contact |
|---|---|---|---|
| Molex KK 254 | 2.54 mm | no, held by friction | 4 A |
| JST XH | 2.5 mm | no, held by friction | 3 A |
| Dupont | 2.54 mm | depends on the version | 3 A |
Before you plug it in
2.5 mm (JST XH, JST SM) and 2.54 mm (Dupont, Molex KK) look the same on a short connector. Measure across ten pins: 22.5 mm against 22.86 mm.
Crimp terminals need the crimper die made for their size: pliers crush them and the contact works loose. Housings and terminals of different series don’t mix, even at the same pitch.
The current rating is a maximum per contact, at the wire size the maker states. With thinner wire, or with every contact carrying current, stay well below it.
Open the connector identifier →Not sure it is this one? Enter the pitch, the contacts and where you found it: the identifier compares 22 connector families.
Other connectors
JST SH JST GH Molex PicoBlade Hirose DF13 JST ZH JST PH Grove JST XH JST SM JST RCY Dupont Servo plug Molex Micro-Fit 3.0 JST VH Molex Mini-Fit Jr XT30 XT60 XT90 Deans (T-plug) Anderson Powerpole DC barrel plug
Frequently asked questions
What is the pitch of the Molex KK 254 connector?
2.54 mm between the centres of two neighbouring contacts.
How much current can a Molex KK 254 connector carry?
4 A per contact, at up to 250 V, according to Molex.
Figures from the makers’ catalogues and datasheets. Ratings are maxima: derate for thin wire and for many loaded contacts.