Specifications
| Pitch | 2.5 mm |
|---|---|
| Contacts | 2–12 or 18 |
| Rows | one |
| Current per contact | 3 A (AWG 22) |
| Voltage | 250 V |
| Wire | AWG 28–22 |
| Latch | yes, a tab to press |
| Mating | wire-to-wire |
| Maker | JST |
| Housing | SMP-nnV-BC · SMR-nnV-B |
| Contact | SHF-001T-0.8BS · SYM-001T-P0.6 |
In part numbers, n or nn is the number of contacts.
Lookalikes and how to tell them apart
Wire-to-wire with a latch arm, 2.5 mm pitch, from 2 to 12 contacts. JST RCY is 2-pin only, usually red, with the lock hidden inside.
| Connector | Pitch | Latch | Per contact |
|---|---|---|---|
| JST SM | 2.5 mm | yes, a tab to press | 3 A |
| JST RCY | 2.5 mm | depends on the version | 3 A |
| JST XH | 2.5 mm | no, held by friction | 3 A |
Before you plug it in
LED strip leads change colour from one maker to the next: follow the labels printed on the strip (5V, DIN, GND), not the wire colours.
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 RCY Molex KK 254 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 JST SM connector?
2.5 mm between the centres of two neighbouring contacts.
How much current can a JST SM connector carry?
3 A per contact with AWG 22 wire, at up to 250 V, according to JST.
Figures from the makers’ catalogues and datasheets. Ratings are maxima: derate for thin wire and for many loaded contacts.