A SIM socket is chosen on card size, mechanism and profile height. KINGCONN publishes Nano SIM sockets at 1.24mm to 1.4mm profile, Micro SIM at 1.34mm to 1.5mm and Mini SIM from 1.8mm, in push-push, hinge and push-pull mechanisms with or without a card-detect pin. Card dimensions follow the ETSI specifications; KINGCONN values come from the part drawings.
Card sizes: 2FF, 3FF and 4FF
| Card | Dimensions | KINGCONN profile | Where it is used |
|---|---|---|---|
| Mini SIM (2FF) | 25.0 × 15.0 mm | from 1.8 mm | industrial routers, telematics, installed equipment |
| Micro SIM (3FF) | 15.0 × 12.0 mm | 1.34–1.5 mm | transition-era equipment, some industrial modules |
| Nano SIM (4FF) | 12.3 × 8.8 mm | 1.24–1.4 mm | phones, IoT modules, new designs |
The 3 sizes are not interchangeable in a socket — an adapter is a mechanical shim, not a conversion. New designs are almost always Nano; Mini SIM stays in production because industrial routers and telematics units in the field still use it.
Mechanism and card detect
| Mechanism | How it works | When to use it |
|---|---|---|
| Push-push | insert to latch, push again to eject | equipment where the user swaps the SIM |
| Hinge / flip | a lid folds down onto the card | factory-configured, rarely changed; short body |
| Push-pull (no push) | card pulled straight out | fewest moving parts, least space |
| With CD pin | any mechanism plus a card-detect contact | firmware needs to know whether a SIM is present |
The card-detect pin is the one that gets forgotten. Connected equipment without it can only infer a missing SIM from a failed connection, which is indistinguishable from a network outage. It changes the terminal count, so decide before layout.
KINGCONN SIM sockets
7SIMC-F0-0043Nano SIM Card Push Socket 7-Pin 1.37H with CD Pin
7SIMC-FA-0021SIM Card Push-Push Socket 1.35H with CD Pin
7SIMC-F0-0023Nano SIM Flip-Type Socket 1.4H
7SIMC-F0-0030Nano SIM Card Socket Non-Push H1.35
7SIMC-F0-0014NANO SIM 6PIN H:1.25mm
7SIMC-FA-0004Micro SIM Flip-Type Socket 1.5H
7SIMC-AA-0006Micro SIM Card 8-Pin Socket 1.5H (Flip-Type 8×1 Pin)
7SIMC-F0-0041Micro sim push H:1.42mm
7SIMC-FA-0006SIM CARD PUSH PUS(6+2PIN) H=1.8mm
7SIMC-FA-0013SIM card 6pin H:1.8mmNano, Micro and Mini SIM sockets: push-push with CD pin, hinge, push-pull and 6- and 8-position versions.
| Part number | Height (mm) | Drawing |
|---|---|---|
| 7SIMC-F0-0043 | 1.37 | 7SIMC-F0-0043-C |
| 7SIMC-FA-0021 | 1.35 | 7SIMC-FA-0021 |
| 7SIMC-F0-0023 | 1.40 | 7SIMC-F0-0023 |
| 7SIMC-F0-0030 | 1.35 | 7SIMC-F0-0030 |
| 7SIMC-F0-0014 | 1.25 | 7SIMC-F0-0014 |
| 7SIMC-FA-0004 | 1.50 | 7SIMC-FA-0004-A |
| 7SIMC-F0-0041 | 1.42 | 7SIMC-F0-0041-C |
| 7SIMC-FA-0013 | 1.8 | 7SIMC-FA-0013-A |
Materials and RFQ
Housings are LCP or high-temperature thermoplastic rated UL94V-0 with copper alloy contacts, RoHS compliant, and each published value carries its source drawing number. For the SIM pinout and the electrical interface see the SIM card pinout guide. Send your card size, mechanism and height limit to service@kingconn.com.tw.